posted on May 30, 2011 16:47
Mike Bonanni, Dai Yoshihara win MPTCC Round 3 at Cal Speedway!
MotoIQ Staff Report
Mike Bonanni in the Berk Technology BMW 135i pulled off a threepeat in the third round of the MotoIQ Pacific Tuner Car Challenge. Bonanni won the Tuner Over class which had a light field thinned by the attrition of three entrants in qualifying and practice.
|The green flag falls and Bonanni in the Berk BMW jumps out in the lead!
Bonanni won after a terrific crowd pleasing battle with Formula D drifter Carl Rydqust in the City Tire Nissan 350Z, swapping the lead many times over the duration of the race before gaining control with two laps left for the win.
|The faster more powerful TO cars gap the TU cars quickly.
Current Formula D points leader Dai Yoshihara lead every lap of the Tuner Under race in the Team MotoIQ/GTI Technical Innovations/Technosquare/ Jim Wolf Technology Nissan Sentra. Yoshihara dominated the race despite a brief fight for the lead with the APD Motosports/Honda Racing Development Acura TSX driven by Brian Smith.
|The 4 anticipated favorites to win TU, Mike Kojima in the lead with Team MotoIQ teammate Dai Yoshihara on the inside. Brian Smith in control of third in the APD Motorsports Acura TSX and Richard Ho in the APM Racing Acura RSX in 4th. These 4 were quite a bit faster in practice and qualifying over the other TU entrants.
Tuesday, May 31, 2011 5:05 AM
Sounds like it was a fun event.
Is a rotary powered car considered TO or TU?
Tuesday, May 31, 2011 5:14 AM
It is TU because it is essentially a SCCA T2 or NASA PTD car. The engine is pretty stock. For MPTCC they are allowed aero and lightening mods.
Tuesday, May 31, 2011 5:49 AM
Ah... I saw Robi walking around. Didn't realize he was racing the RX8!
Tuesday, May 31, 2011 6:09 AM
Congrats on the comeback Mike. Do you think you and Dai could've been battling it out had you not suffered the crash incident?
A side note: I met Oscar Jackson Sr. at the PHX event. He was extremely approachable, nice and really cool to learn from. The inside scoop, though, is that Note was a little hard on Oscar in some forums about not developing his supercharger for the gen II Fit yet. I think Note is going to need to extend an Olive Branch or three! I've been thinking that a Kraftwerks supercharger might look nice on Annie's project Civic though!? Really, really impressed by Oscar Sr. Somebody needs to get him on here. He'd be an excellent addition to the Motoiq community!
PS. I thought TO/TU classes were determined by lb/hp?
Tuesday, May 31, 2011 6:20 AM
Wow! What an honor it was to race side by side with you guys! Once we get the gremlins all figured out, I hope to become more competitive the next go around! -- Scott VanderHeide
Tuesday, May 31, 2011 6:42 AM
Yes the classes are determined by power to weight. I think the rotary only needs to make 240 hp as the car weighs 2800 lbs with Robi or something like that.
Robi is a smart guy and I fully expect the car to be a force to be reckoned with. The car was a late entrant and was literally still being built in the pits!
Robi was using some interesting M&H camber tires. M&H is known in the drag world and are now trying to make it in the DOT road racing market. The tires are weird, they have built in negative camber molded into the tire. The compound is very soft but they seem to wear like iron.
Robi reported that they grip and wear really well.
Tuesday, May 31, 2011 6:52 AM
I could not touch Dai. Dai was on Hankook tires that griped like crazy although they completely wore out over the course of the weekend. Dai sat out two practice sessions to save the tires and its a good thing he did. The SR20DE also has more low end torque and with 15" wheels the Dog Car was way faster out of turns.
The Dog II could not match the lateral grip and the 17" wheels were messing up the gear ratio. When combined with the peaky SR20VE, it made for slower lap times. I was faster on the oval but Dai was faster everywhere else.
Dai and I have very different driving styles. Dai brakes sooner and apexes later aiming for good exit speed. I brake later and slide the car through the turn more with an earlier apex. I tired driving his way but he was still faster.
I am going to try to find a 4:40 ring and pinion for the Dog II and discuss how to get more power out of the Dog Car with JWT so Dai can get faster. We will probably go with bigger cams and a higher rev limit. We are also going to make aero changes on both cars. Dai's car will get a rear diffuser and both cars will get minor front aero tweaks for more front downforce and less drag.
Tuesday, May 31, 2011 7:27 AM
Hi guys, do you have any specs, details, or pictures of the RSX? What suspension and tires was he running? I have a RSX too so just curious what the pros are running!
Tuesday, May 31, 2011 7:48 AM
So where would a 13B powered 1982 SA22 RX-7 fit in? Is there hp and weight verification? A stock 6 port 13B makes a measly 135hp from a 1984 GSL-SE.
Tuesday, May 31, 2011 7:53 AM
They have scales and RRE brings a portable dyno for verification.
Are the wheels turning? Something fun planned with a certain 1982 RX7?
Tuesday, May 31, 2011 7:53 AM
Probably TU with a 12:1 power to weight ratio.
Tuesday, May 31, 2011 8:11 AM
So Dai competes in road racing, too? Cool. (I know some of the competitors in Formula D only compete in drifting.)
Tuesday, May 31, 2011 8:21 AM
congrats guys, I had fun spectating this weekend. And who's Steve Rockwood? I thought Martin was driving the g20.
Tuesday, May 31, 2011 8:37 AM
Martin drove the G20 on Saturday to work out the kinks in the car. It was a bit down on power due to a couple issues. Steve raced it on Sunday.
Tuesday, May 31, 2011 9:28 AM
Very Fun race to watch! Wish we had the 5 cars in TO, but I anticipate that being resolved for the next event.
I think we'll come out of this event with some much needed momentum that will build over the next few events. With the cars I know are being built and the teams with cars who have been watching from the outside, I fully anticipate having a combined field of 20-30 cars when we return to Auto Club Speedway in October.
What's so cool about the MPTCC is that you don't have to spend a small fortune on a car to be competitive. And hell, even if you want to spend VERY little money, a car used in HPDEs, but with full cage and safety gear, would be super fun to go race with.
My 170whp Focus with cage won't be competitive as it sits now, but it would be a BLAST to go racing. Getting to 200-210whp won't cost an arm and a leg, and then the car would be capable (in the right hands) of being a Top 5 car.
To be even remotely competitive in Street Tire FWD I'd need at least 300whp and all sorts of other goodies.
The MPTCC will most certainly be the destination for my personal track car, I can assure you that!
Willow is 5 weeks away and I anticipate that event being better yet!
Tuesday, May 31, 2011 9:44 AM
Wheels are definitely turning. Is an IRS conversion possible with a 1982 RX-7 and still run in TU?
Tuesday, May 31, 2011 10:11 AM
Watching Mike Bonanni and Carl Rydquist racing against each other was epic, great race !
Tuesday, May 31, 2011 10:15 AM
That's a shame about the 3 guys that weren't able to make the grid for TO. I need a reminder: who/what would we have seen racing if they hadn't had issues?
Tuesday, May 31, 2011 10:22 AM
Fly'n_Z: We would have seen: Robert Tallini in a Road Race Engineering EVO, Dave Lemon in a Mazdatrix RX-8 and Casey Dennis in his Honda S2000.
Tuesday, May 31, 2011 10:24 AM
Eric, you can't change the rear suspension design. Links are open and you can move suspension pick up points 1". A low stress 13B street port will run all season and cost almost nothing. I think an SA22 would be super competitive and cheap to build.
Tuesday, May 31, 2011 10:27 AM
Nick, you just need to dust the car off and bring it out. A lot of the car are not quite on the power to weight ratio limit. Dai's car for instance was only making mid high 170's in the power range and it can run 210 or so. It what a well sorted car with a good driver can do.
Dai will have more power and better aero for Willow so look out! Hopefuly I can find the gears needed to make my car run like it should as well!
Tuesday, May 31, 2011 10:30 AM
Dai was very consistent and always picked the same lines (Fontana's oval is huge) and a lot of drivers were using many different lines on the outside field. Once turned into the 3rd corner, many used the same lines though.
Mike, get smaller mirrors for both cars, and close up those vents in the front bumper of the Dog Car2 (unless you use duts for the brakes).
Tuesday, May 31, 2011 10:34 AM
Mike like I said, sell those 17'' and downsize to 16''. Get those C51 and slap on Nitto decals :)
Tuesday, May 31, 2011 10:41 AM
This was an exceptionally fun race despite only having one other car in my class. Carl is an excellent driver and both cars had their own little quirks throughout the race. It was a great first match up but I can anticipate it getting only more competitive from here on out. I say bring it on!
Tuesday, May 31, 2011 12:30 PM
We are already working on this.
The cars are getting molds for the opening block offs as we speak. We are reshaping the intakes for the airbox and coolers as well. We did some analysis (but not CFD) and estimate that the mirrors are around 8 percent of the entire drag.
I like big mirrors myself though and have to discuss this with Dai.
We are upping the power on Dai's car and taking some weight off of both cars. We are also going to revalve the shocks and will be talking to KW to see if they are willing to help.
Two of our competitors are getting low pressure turbo systems and I am sure everyone is looking how to step things up so we have to as well.
Tuesday, May 31, 2011 3:22 PM
Hmm..... turbo systems could really beef up the midrange. If done WRC style, that'll create a monster midrange. A simple restrictor would ensure that the HP limit is not exceeded.
Tuesday, May 31, 2011 6:02 PM
Where are the lap times ??
Tuesday, May 31, 2011 6:22 PM
Tuesday, May 31, 2011 6:30 PM
@ Mike (Kojima): I like big mirrors myself too....but drag is drag.
There's a small company in Japan called Juran, they make all kinds of small bits for Japanese cars.
They sell those rubber gurney flap (it comes in a 8ft. roll, then you cut whatever you need). You can find in on Ebay for 30-40 bux. It comes with a double-sticky tape. Here are some pics on my wing:
Tuesday, May 31, 2011 8:17 PM
I have some of that stuff, I bought it in Japan but it's too wide as a gurney. A gurney should be max 5% of the chord. I bought it to use as air trips on high powered cars.
When you wear a HANS device you can't move your head much and I feel much safer with the big mirrors. My time attack car has tiny mirrors and I don't like them.
Wednesday, June 01, 2011 10:08 AM
Pretty sweet breakdown of the race... sounds like lots of fun!! Is the Evora the pace car? Also agree it'd be pretty cool to get a rotrex supercharger into the Honda Fit or Project Civic! I don't think they make a kit for EKs though, so Anne would be on her own to fabricate all the mounting hardware for the pulley & charger. It'd be pretty sweet, but hopefully Kraftwerks makes a kit for both!!
Wednesday, June 01, 2011 3:36 PM
Eric L....the RSX was running on......NT01 tires and the suspension was Tein Mono Flex (singel way adjustable). With the RSX suspension geometry....it is very hard to setup the car. By using the Mono Flex suspension (it is not the best suspension choice since it is consider a street/weekend warrior set up) we did the best that we could for the race. Our normal set up is using the Tein N1 (full race double adjustable suspension), but could not get them re build in time for race. By using the Mono Flex suspension (out of the box spring rates)......we were amazed how well it performed out of its intended use (FULL RACE). Want to thank Philip at Tein for helping us out with the suspension. I am sure that the Mono Flex will work great with a car that is a daily driver and a weekend track car.
Thursday, June 02, 2011 9:01 PM
Richie168: Thanks for the reply! What camber/caster/toe are you guys running? Are you running any custom tie rods (i.e. adjustable, inverted), roll center adjusters, caster plates, etc...? What tire sizes are you running (i.e. reversed staggered)? Thanks!! --Eric
Friday, June 03, 2011 5:06 AM
Excellent race, and the ruleset for TU is just about perfect.
Beware the G, as it was spotting 30-50 whp and 20-40mm of tire on the front runners. All will be remedied by season's end. :)
Friday, June 03, 2011 3:02 PM
Eric L.....sorry.....dont have much info on the suspension set up....the tire size is 245/40/18 all the way around....I just wheel the car....
Friday, June 03, 2011 4:16 PM
I see, regardless, thanks for the info!!
Wednesday, June 08, 2011 9:36 PM
Hey Mike, why not replace it with Ganador mirrors instead of using a smaller mirror?
I'm just not sure if you're familiar with this: Mirror
Thursday, June 09, 2011 7:12 PM
Those probably have more drag than stock
Wednesday, January 18, 2012 10:43 AM
Dear Mike, I'm from Peru and i want to know were can i ask you some questions about my race car (B14 nissan sentra).
My email is firstname.lastname@example.org