posted on February 22, 2012 05:05
Team America World Time Attack - ARK Design's BNR32 Skyline GT-R Part 1
by Eric Hsu
When Richard from Sierra Sierra last year told me that the Sierra Sierra EVO was going to unofficially retire, I knew I had to find a way back to Sydney's World Time Attack Challenge for 2012. Ian Baker, CEO of Superlap Australia which is the promoter of the WTAC, already told me last year at 2011, "Mate, you are coming back in 2012 no matter what. Worse case, we're going to make you an eligibility scrutineer and all the teams are going to fucking hate you because you know your shit!" While happy to be a part of the WTAC staff, I think my home is in the pits with a team. That's not to say I might not take Ian's offer in the future of course.
While the BNR32 Skyline GT-R you see here has been resting underneath a car cover in a warehouse with it's engine turned 60 degrees once a week for the last 5 years, I also saw it as a ticket back to WTAC 2012.
I did pull it the car out of the warehouse once in five years and took the BNR32 to the 2008 IDRC Finals and won the GT-R Challenge. Luckily my competitor in the finals red lit and I took the win. Untouched from time attack form, the car ran a 10.3 second 1/4 mile ET with a mis-shift into 4th. I could not get the thing to shift into 4th gear with the stock transmission mounts moving all over the place. The run above is against Sean Morris in the RB Motoring BNR32.4 GT-R where I ran a 10.48 @ 137. I think this was the only run I didn't mis-shift, but I did short shift it for some reason.
Back to the ticket to WTAC 2012: Coincidentally around October/November of 2011, my friend Andy who is the owner of ARK Design, also asked me about what I thought about him building a Time Attack car to take all over the world for marketing purposes. Naturally being the Time Attack junkie that I am, I loved the idea. You see, the rest of the world outside of the USA actually gives a shit about road racing and people actually attend Time Attack events. If you break it down further: Time Attack is drag racing with turns except it's better. Drag racing is hard on the drivetrain, is ultra expensive to be fast at, and is too short in duration. While I enjoy the occasional drag race myself, I find Time Attack levels the playing field since there's a whole lot more skill involved for drivers, engineers, and mechanics alike. Plus Time Attack naturally filters out the shit talking rednecks who only know how to drive straight or in circles, separates the FFF forum shit talkers from the truly hardcore, and rich Supra/GT-R dynosheet racers all at the same time. An actual road race event is fine, but then there's too many possibilities of running into traffic, crashing etc. So therefore I believe that Time Attack is the ultimate platform to showcase a car, driver, and team's ability since it already includes many aspects of racing within it: drag racing (trap speed on the front straight), road racing with lap times without potential traffic or crashing, driver ability without the torture of an endurance event, tuning with the requirement to lay down full throttle big power for a sustained amount of time, and finally the oval trackish short attention span (it's only one lap).
Anyhow, so Andy and I made a deal where ARK gets the car and I am commissioned to build the car into the ultimate BNR32 Time Attack car within an allotted budget. Of course, a team of people are needed to build a race car so here are the guys I got together:
Posted in: Magazine
, Beyond the Dyno
, Project Cars
, Race Cars
, XS Engineering BNR32 GT-R
, KW Suspensions
, Borg Warner
, Vibrant Performance
, Time Attack
, Project Nissan Skyline GT-R (BNR32)
, Time Attack Cars
, Skyline GT-R
Wednesday, February 22, 2012 6:47 AM
Eric, if you need a Vietnamese guy on the team, let me know. I can't do shit with engines, but I can draw cars and drink beer like a mofo.
Wednesday, February 22, 2012 6:52 AM
Sounds like the ultimate internship. Too bad I'm on the other side of the country. The old RB26 sounded excellent at the strip. Where's it going to end up?
Good luck to Team America. Sounds like you're all building a dream team and after SSE's showing the last 2 years, America needs a team to defend its honor.
And lastly, I'd love to see a Time Attack live, but the problem is they are all on the West Coast. Get some Time Attacks out in the East and I'm sure people would go.
Wednesday, February 22, 2012 8:12 AM
8695, Global Time Attack is having events all over the East this year. Check out their website for a schedule.
Wednesday, February 22, 2012 8:20 AM
^^So they do! I'm definitely going to NJMP in August. Will Blue Steel be ready by then?
I was skimming this article before class and now that I've had a chance to go through it, this car sounds like it will be epic. Definitely keep us posted on the progress!
Wednesday, February 22, 2012 8:44 AM
This is going to be incredible. Can't wait to see what you guys come up with using all that Pi Research hardware (even though connectors are going to be murderously expensive). Top-notch engine and suspension work makes a great car, but controls, data, and people who know strategies and analysis makes a world-beater. Looking forward to updates if you ever get a chance to catch your breath!
Wednesday, February 22, 2012 8:52 AM
A big huh? when I saw the RB pulled out of the car for ___? Then a big "aaah" when I saw the VQ. The motor is impressively light, looking forward to seeing a real motorsports grade build with a VQ35!
Wednesday, February 22, 2012 8:58 AM
Amazing, I am really looking forward to this build. 8695 beaters, I'm shooting to be at njmp his year as well
Wednesday, February 22, 2012 9:26 AM
Wow, I can't wait to see more of this build.
Wednesday, February 22, 2012 9:52 AM
8695, If this car is going to WTAC this year, it won't be able to make the New Jersey event as it is the week before WTAC.
Wednesday, February 22, 2012 10:18 AM
I am so excited about this effort, the build of the engine and everything involved with reviving the beast. Very very awesome Eric!!!
Wednesday, February 22, 2012 10:42 AM
I think you need a white guy (like me maybe) on your team ;-)
You know we are on board Eric. Kick some ass!
Wednesday, February 22, 2012 11:01 AM
best of luck!!
It's good to see Nissan Motorsports in motorsports again.
Wednesday, February 22, 2012 1:18 PM
So excited that the formerly XS R32 is going to see some action again. I sure miss working on the car! I have fond memories of blasting down West St 'testing' out the Hollinger we borrowed from DSport. If you guys ever find yourselves on the East Coast, be sure to let me know. I will be there! Good Luck!
Wednesday, February 22, 2012 1:56 PM
Sweet! Nice to see some one adopting the VQ AWD setup with GTR transmission. That combo has been banging around in my head for years!
Also looking forward to seeing what Kojima does with the GTR kinematics.
Wednesday, February 22, 2012 2:06 PM
Wednesday, February 22, 2012 2:39 PM
The ultimate car. Happy to see Eric building a VQ, especially one that may potentially destroy the newer AWD cars.
Wednesday, February 22, 2012 2:49 PM
In my top 10 dream cars, the BNR32 falls pretty close to #1. I was also confused when you pulled the RB out, but the VQ is an excellent choice. Any plans to up the displacement? Also, how does the RB Holinger bolt up to the VQ motor? They don't share the same bolt pattern do they?
I also remember this car from its first build on Street Tuner Challenge. This was the first time I had heard of using foam to fill the frame rails for rigidity. I also remember its first track outing was cut short due to a wheel bearing. Ah, the memories. Can't wait to see more memories made with this build.
Wednesday, February 22, 2012 2:52 PM
who's gonna be driving it?
Wednesday, February 22, 2012 3:27 PM
It is going to be very interesting to see how the VQ sits in the engine bay compared to the RB. Going to shift a lot of weight towards the middle i bet! Is the WTAC going to be the only event this car is going to run in?
Wednesday, February 22, 2012 3:48 PM
The VR38 isn't really that expensive. I know you have the VQ35 already, but there is no replacement for displacement. There were those Euro recall engines floating around for a while. Not too over the top. A new VR block is about $2600 - $1100 on a crank. I like the fact that the VR is a closed deck block. Poor RB. They sound great, they work, but are very old technology now.
In that video racing the RB R32, I missed 3rd or 4th gear that time. Damn Getrags, and not enough refresher time in right drive cars. That video is about the last time that car ran too. Its just been sitting a lot of years. I really like that car.
So what are you doing with the all wheel drive system? See the new DoLuck Digital G-sensor? I heard Full Race was working on a ATTESA ECU, perhaps you know more about that than me.
Wednesday, February 22, 2012 4:09 PM
Haha, my Asshat comment about how that VQ would look better in a BNR32 doesn't look so asshat anymore! From this "secret" project Mike had hinted about, I thought you guys were going with an S chassis (maybe even Dai's if they're not using it). I'm so excited for this! Ditto on the questions regarding whether or not we'll see this stateside? If you decide to run Blue Steel at the Nurburgring, my translator services come cheap! Heck, if you decide to run this Stateside I'd probably fly in, I think I still owe you a VQ vs LS burger!
Wednesday, February 22, 2012 4:21 PM
Eric this going to be badass can't wait to see the car running around the track kicking ass and taking names.
Wednesday, February 22, 2012 4:41 PM
I need to find a way to WTAC...still working my way there. Glad to see a plan for you guys to get a car together for this year. I was also wondering what powerplant was going to replace the nose heavy RB.
In for the build :)
Wednesday, February 22, 2012 5:00 PM
What a bummer the two time reigning champ is retired now but this should give team america a legit shot at the title. This is by far the most exciting build of 2012 I have come across I cant wait to see the results.
Wednesday, February 22, 2012 5:45 PM
b.tee: Only if you bring egg rolls and cafe su da.
warmmilk: We are not sure who's going to be driving yet. Andy from ARK is talking to some drivers while I'm talking to others here in the US.
ussil80: Yes, the goal is to shift some of the weight back. I wish we had more time and a transaxle...
Sean: It's not the VR38 block or heads that are expensive, it's the ancillaries. Brand new, the ancillaries excluding the block an heads are about $18k per VR38. The VQ is fractional. And there is a replacement for displacement with race engines: it's RPM.
Yeah that day at the track was fun. We need to do that again when the VQ is up and running after WTAC.
I think the ATTESA mods will be covered in part 4 or so. Read on.
Bruce: I don't think Blue Steel will run at Nurburgring, but I do know of another project that might. My 3 years of high school German won't get me anywhere in rural Germany so maybe I'll need to hit you up!
Everybody: Yes, I believe ARK is planning on running this car at some events in the US. Perhaps season finales of GTA and Superlap, but definitely not an entire series. This car is not about series. It's about going all over the place.
Thank you all for the positive comments. Like they say in the movie Team America World Police, "Team America, FUCK YEAH!"
Wednesday, February 22, 2012 6:41 PM
damn if i was still in LA i would see if you needed help with the soldering of the harness. Good luck and can't wait to see this in time attack.
Wednesday, February 22, 2012 6:45 PM
Looks like such a fun build. I'm jealous that there isn't a lot more of this happening in the US.
While you're bullshitting during the build, convince the ARK guys to make their R8 wheels in 5x100. Or just to make a few sets for me.
Wednesday, February 22, 2012 6:54 PM
Eric, good job! I actually knew it...or I should say, I sensed it.
Last year you've kept mentioning the VQ35HR, and how great it is.
Also, you've kept mentioning that the R32 chassis being fairly light (comparing it to other Skylines, GRB, CT9A and so forth). I thought right away about the XS Engineering Skyline.
So, when I saw the picture of the RB pulled out, I knew it, great choice!
Much more compact than any inline 6, sturdy enough to make reliable power, and MUCH lighter than a closed-deck iron block..
I foresee a VQ35HR built very closely to the Nissan Fontana 350Z Time Attack+ the EFR turbo :)
You guys are going to have some tough competition though and you know it: Nemo Racing, possibly Redbrick Racing, and even the folks at Revolution with their FD (assuming they drop in a 20B instead).
Wednesday, February 22, 2012 7:11 PM
are you gonna do some crazy aero like the indy car bottom on Christine?
Wednesday, February 22, 2012 9:21 PM
Eric, this is awesome....I've been hoping to see some more R32 action. Ditching the RB26 must be bittersweet, but the VQ with all the Cosworth parts and an EFR will be epic. Definitely looking forward to seeing how the project progresses. Best of luck.
Wednesday, February 22, 2012 9:32 PM
what's EMP up to, any chance he is in the running for hot shoe since he has some experience with the track and already came pretty close to inning it for team America last year... also I'm surprised AMB aero wasn't named as a partner for Team America
if Blue Steel does make it to the Nurburgring, it will have the chance to go up against another outrageous Team America build, the P 4/5 Competizione Modificata with F1 KERS developed by Magnetti Marelli, the build is well documented over on Ferrari Chat
Wednesday, February 22, 2012 9:54 PM
This is going to be a low buck build (for umlimited time attack anyway)and we are going to be the underdogs but that's how Eric and I like to roll. Bringing the pain the the better funded.
Wednesday, February 22, 2012 10:00 PM
Wednesday, February 22, 2012 10:07 PM
Fabrik8: I told them to make 5x100 R8's. They didn't listen!
Alex: This year's WTAC 2012 competition is going to be absolutely crazy I think. It's going to be an epic battle among the 10 fastest cars I bet.
M-P: I still have my street RB26 to scream everywhere. I'm cool with that.
warmmilk/henry: Yes, we're going to do some kind of aero. I discussed Andrew doing some aero consulting for us, but due to the project timeline, his workload, and where he is geographically in the world (Japan), we are probably not going to be able to do anything for this build. I think Mike has some ideas up his sleeve and an aero buddy to bounce ideas off of.
I have been talking to Emp of course (although he's Canadian). Still it's North America, right? If Blue Steel goes to Nurburgring, we'll have to triple the size of the fuel cell. It's unlikely it will ever go anyway...
Mike: Pain we will bring.
Wednesday, February 22, 2012 10:09 PM
do you have any pics of the G35 awd system and how it looks on the G?
Wednesday, February 22, 2012 10:20 PM
What kind of weight distribution advantage will the vq35 offer vs the rb in this chassis (estimate). Excited for this build
Thursday, February 23, 2012 12:05 AM
Duuuude! I'll drive for you! I'll pay for my ticket, food, accommodation, everything! And I promise you won't even realize it's my first time on a race track! I'm really good in Forza yo!
Even if you don't let me drive I'll be there this year for support. I went the first year, missed last year and told myself I'll never miss another one!
Good luck with the build. I have no doubts you guys will churn out the most outstanding BNR32 Time Attack car to date. Looking forward to more updates!
Thursday, February 23, 2012 12:29 AM
Hell yeah Eric and Mike! Bring the pain!
....says this SR20 Nerd!
Thursday, February 23, 2012 1:21 AM
Eric, how much does a VQ35 weigh, (long block that is)?
How about a RB26, (also long block)?
Does anyone know?
Thursday, February 23, 2012 3:17 AM
How come no one in JDM land has done this swap? Good ol American ingenuity FTMFW
Thursday, February 23, 2012 9:09 AM
Actually there has been a VQ.dumped into an r32 before. I dont recall who dis it tho.
Thursday, February 23, 2012 9:39 AM
You may be thinking of the Top Secret "VQ32" BNR32 with a VQ35DE swap. Check it out:
Awesome looking car but I've never seen much about it... Would love to see it on the track.
Thursday, February 23, 2012 10:09 AM
@a6killa: actually pyro3113 is right. Top Secret did drop a VQ35 into a BNR32. Along with their own ITB's. Pretty wicked!
Thursday, February 23, 2012 10:42 AM
The VQ35HR long block weighs around 315 lbs with no accessories. I have idea what the RB26 weighs though.
So far all the VQ swaps have been rear wheel drive. I suspect this will be the first AWD swap which is why we are figuring out all this shit on our own. I am learning so much about every Nissan V6 and aWD variant that it's not even funny.
Thursday, February 23, 2012 10:57 AM
FX35 transmission, the transfer should look really familar to you Eric.
Here are some weights I did.
Heads cams /valve covers- 72 lbs
Block bare - 145 lbs
Pistons /rings in box - 8lbs
Front diff/pan - 55 lbs
Rods in box - 11 lbs
HKS 2.8 crank (should be similar to stock) - 60 lbs
Tubular HKS manifolds - 11 lbs
Turbo - 16 lbs each
Cast turbo outlets - 6 lbs.
Total of around 406 lbs . This is still missing lots of bits and pieces . All the intake manifold stuff , the throttle bodies , sensors , oil cooler .Lines , Inlet piping , coil pack , belts , flywheel/clutch.
Block: water pump, ac/ps brackets; 150lbs
Crank: with crank girdle; 65 lbs
head: intake/exhaust manifold, no valve covers and coils; 110lbs
Pistons: with rod bolts and rods; 15lbs
oil pan: 7 lbs
valve covers: both with coil pack cover; 10lbs
Rear oil seal cover,oil pump, crank pulley; 10lbs
Flywheel: with ACT rb25 PP and disk; 35lbs
stock turbo; 15lbs
So that puts the engine at
417 lbs with all major parts.
Thursday, February 23, 2012 12:29 PM
I weighed a fully dressed VR38DETT at 608 lbs on Steve's scales.
Thursday, February 23, 2012 12:44 PM
Was that with the transaxle? If so, that isn't so bad.
Thursday, February 23, 2012 1:46 PM
So sick! Can't wait to see this car back in action! I only wish WTAC would offer up a proper livestream of the event for those sorry saps like me who can't make it to the event! :-( If that won't work, then I'll just have to make it up to SLB again! :-)
Still one of my best memories in Time Attack was standing under the cross-over bridge of the Auto Club Speedway infield road course and watching Tarzan blast by in this car going some INSANE speed! I couldn't have been more than 10 ft away from the car as it blasted by! Oh the sound! :-) Music to my ears!
Thursday, February 23, 2012 3:54 PM
Eric - If I wasn't on my phone, I could give you a better answer but I'm pretty sure a company out of San Diego did an AWD swap on a G35. I remember it from years back in one of the now SourceInterlink mags, so it's probably online (white in color I think). Anyway, might give you ideas for the diffs or might even be a good contact. You know what they say about the path already made, "It's easier not to get lost."
Thursday, February 23, 2012 5:44 PM
There was a white AWD G35 that was supposed to be in the USCC one year. Mike would probably remember, but the shop that ran it didn't show up for the challenge and later were outed for being a chopshop/scammer. I remember reading about it in SCC, screwed the mag over on some work.
Thursday, February 23, 2012 5:45 PM
I found it: http://www.modified.com/features/0711_sccp_2003_infiniti_g35_coupe/viewall.html
Thursday, February 23, 2012 5:46 PM
Whoops, no edit (or is there?) but the shop was VRT, screwed a bunch of people over I think, but don't hold me to it because it's been a long time.
Thursday, February 23, 2012 6:17 PM
On the edge of my seat for this build, and more importantly, what comes of it.
Eric, is this build aiming at being able to run times on par, or quicker, than Christine?
Thursday, February 23, 2012 6:23 PM
It sure would be entertaining/effective to have Hsu as a eligibility scrutineer at WTAC... lol.
Bummer about the conflicting AB schedule/geographic location, but on the flip side, it is cool AB has become so busy with aero! Gotta love his aero and the results.
Thursday, February 23, 2012 7:00 PM
"Was that with the transaxle? If so, that isn't so bad. "
Transaxle weighs another 326 lbs.
Thursday, February 23, 2012 9:09 PM
Oh yeah, VRT. They disappeared in like 2 seconds. That was a G35 AWD conversion, not a Skyline GTR with VQ AWD conversion. I think we still take credit for first on that one.
MrTimeAttack: I believe live streaming is part of Superlap AU's plan.
eeeen: We wouldn't be building this car if we weren't planning on going faster than Christine.
Sean: Damn, the R35 drivetrain is RIDICULOUS heavy.
Thursday, February 23, 2012 11:58 PM
This is freaking incredible. So great to see this car coming back again. You guys are the best. Gaw I love this site.
LOL @ VRT. The bastards.
Friday, February 24, 2012 8:29 AM
Aero, Aero, and more Aero. And put that VQ as low and as far back as you can!
Friday, February 24, 2012 2:12 PM
As soon as I posted that question, I nearly guessed the response headed my direction, lol. Still good to have conformation this beast is aiming at the big dogs.
Really good news that even w/o SSE, Team America will have a DEPENDABLE top tier TA team/car representing them. A few of our other possibilities have been questionable in regards to the team/car dependability/performance, and more importantly professionalism. SSE did a great job representing Team USA, and I wish for a quick return, but more importantly, any return.
Friday, February 24, 2012 4:01 PM
Very cool Eric!
I have joked about the idea of doing this....but there is no way in hell I could afford to do this or have the resources. I'll enjoy following this build though and vicariously live through you!
Best of luck to you! And if you need a home for any RB parts ;)
Friday, February 24, 2012 11:31 PM
great article on selection choice of parts and assembled team. looking forward to discovering new tricks and to further see and understand more about the electronic side of things that you will be doing
Saturday, February 25, 2012 6:13 AM
@ tyndago: thanks for posting the #'s. So it's safe to say that the RB26 is roughly 100-115lbs heavier than the VQ35.
@Eric: I'm not sure you guys will be the first one with a VQ35 AWD.
Mr Koyama, (formerly JUN AUTO honcho) built a Z33 Fairlady with a stroker kit using a Hollinger seq.
I hope it helps you guys figuring things out:
Saturday, February 25, 2012 9:28 AM
JDMized - I totally forgot about that car! Nice find.
Eric - Now that would have been a good resource to draw from. It was an amalgamation of VQ, BNR32 and a few other various Nissan parts. Much better thoughts than my VRT idea.
Saturday, February 25, 2012 1:24 PM
Actually we've already figured our drivetrain out so there's no puzzle that needs to be pieced together, but thanks for the suggestions guys. Both the VRT and the JUN cars are both built from mostly a mixture of factory parts in chassis that already came with VQs. That's easy shit compared to what we're doing. I was aware of the JUN car too and if you've seen how they made the RB bellhousing fit the VQ, you would cringe. You'll see how we did it in the upcoming parts on MotoIQ. Let's just say it's great to have somebody as smart as Tyler as an engineer on your team.
The cool thing about using the Cosworth ECU is we'll have a proper motorsport shift cut strategy for no lift upshifts while minimizing shift times and increasing transmission reliability. Most of the Japanese applications of sequential transmissions completely overlook this. More to come soon...
Saturday, February 25, 2012 2:48 PM
Eric - I hope you are correct about WTAC's intentions to provide a proper livestream of the event. The last time I spoke with Ian about this subject, he said they had no intentions to do so. However, that was about 3-4 months ago. He's well aware of the cost involved to do a proper livestream (HD, 7-10 cameras, full production team, etc.) I've researched what it would take for my own NAFoS event. A ton of $$$ commitment for sure.
Saturday, February 25, 2012 2:56 PM
Eric, you're the man. I keep forgetting you're probably 1/3rd of the way done on this project.
Seeing you guys pull that engine in the wee hours of the night reminds me of my Dad's stories of building engines till 2-3 almost every night, working with the Safeway baja team on the weekends, etc. Keep inspiring!
Sunday, February 26, 2012 9:20 PM
This is going to be good, it's good to see the R32 having another go at time attack : )
Sunday, February 26, 2012 9:46 PM
Man, this makes me happy. I remember seeing a remark on here that you thought the car could be competitive if you and Kojima could get the money to fix the geometry issues, and it's good to see it actually happening.
Monday, February 27, 2012 3:05 AM
Eric at work :)
Monday, February 27, 2012 1:57 PM
Damn that was quick. That was only yesterday at lunch. I took Nakajima, Tarzan, and Daiji for a good old American champagne brunch to show them why Americans are so fat.
Tuesday, February 28, 2012 3:15 PM
Good ol Daiji, I'm still rocking the hypergrounds on the MR-S... which is about to come out of winter storage.
Tuesday, February 28, 2012 5:20 PM
Sounds like the good old days. I wish you guys much success and FUN times. The more Heinekens you feed Gary, the better his work seems to turn out. One of a few asians that can actually put down a decent weld.
Friday, March 23, 2012 5:59 PM
What sort of purple ice/coolant/water mixture would you recommend with a street driven car? bare in mind i live in the UK so temperature can change quite alot
Tuesday, April 17, 2012 6:06 PM
Fantastic! Looking forward to the build details...
Thursday, April 19, 2012 11:12 AM
LeathanE: just run one bottle of purple ice with a 70% water and 30% coolant mixture and you shouldn't have any problems. If you live in freezing temps then you may one to increase the mixture to 50/50.
Thursday, April 19, 2012 11:13 AM
Part 2 off the build is coming next week. Stay tuned on MotoIQ!
Thursday, April 19, 2012 2:29 PM
Thanks for the reply :) also looking very much to part 2
Saturday, April 28, 2012 1:12 AM
Glad for the post Eric. I was beginning to fear something had happened. then again bad ass cars are not built over night!
Friday, May 04, 2012 8:04 PM
Eric: Reading back on this article and noticed a question I had before:
"resting underneath a car cover in a warehouse with it's engine turned 60 degrees once a week for the last 5 years"
Can you explain this? Would it be beneficial for cars stored for roughly a year?
Saturday, May 05, 2012 11:19 AM
I learned this from storing engines at Cosworth. In an engine with heavy valve springs, leaving an engine in storage without rotating it could cause several valve springs to fatigue over time. Rotating the engine regularly simply prevents this from happening.
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