16

Was the SR Swap a Mistake?
Or is the GA a hidden gem that was simply overlooked?

By Frank Ewald


Here in Canada our winters can get quite frosty, but during the track season temperatures in the 90's combined with high humidity are common, especially in this era of global warming. For example, the temperature yesterday was 34 degrees Celcius or 93 degrees Fahrenheit.

Overheating is an ongoing issue with an SR20DET stuffed into an NX1600, but the NX GTiR is getting there. A significant addition to combat this challenge is a G-Spec oil cooler. This is a monster and that's what I needed to keep things cool. However, the capacity and size posed its own issues regarding where to locate it. The initial plan was to fit it in the nose where it would be open to new, cool air but that would have require fitting holes into the nose frame. Tough stuff to drill and, based upon Ontario Time Attack's rules would have cost me a performance improvement point that I did not want to spend.

The high temperatures created by the SR20DET mandated an oil cooler.

Removing the windshield washer reservoir and placing it in the right wheel well is another common spot for a normally sized cooler, but since I bought the ginormous version that was out of the question. It would just fit behind the rad, but that led to the ‘borrow from Peter to pay Paul' discussion in that it was just an exchange of heat. For example, in the nose the cool air would hit the oil cooler then the hot air hit the rad. Behind the rad the cool air hits the intercooler first, then the rad, and then the oil cooler. These ideas just do not make sense but in a crowded FWD engine bay they are often compromises that have to be made. With the NX GTiR we came up with an alternative plan – we mounted it horizontally in the stock battery location. This creative location had lots of room, relatively speaking, and provided a clear and easy path to route the braided hoses. This is not to say that it was clear sailing, because if anything has been learned on this conversion from a 1.6 litre economical momentum car to a tire-shredding 2.0 litre turbo it is to expect complications. The hoses with the G-Spec kit simply did not fit this application. The hoses themselves are truly awesome, beefy units, but when you custom mount the cooler in a unique location then expect the need for custom hoses.

Braided steel lines and industrial strength couplers mean my oil cooler hoses could be used on a bulldozer.

Off to my favorite heavy truck mechanic at Platinum Diesel, for some hoses only to find that his supplier could no longer supply the necessary fittings. He sent me off to PACA, an industrial hose supplier, who had almost everything and could make the hoses on the spot.

They just did not have the fittings in stock. That gave me time to get out some short lengths of garden hose to ensure that I knew the needed route for the cooler hose and could get the exact length required. Then I clocked the fittings. This is a new term that I learned is absolutely necessary for braided lines that do not like to twist and flex very much. Unnecessary when you have a hose with a straight end then a 90 degree end; mandatory when your hose requires two 90 degree slow bends. These angles are fixed and your life will be much easier when you clock the ends by having one at 12 o'clock and the other at 9 o'clock. Tight 90 degree bends are flexible and do not require clocking but they create more turbulence in the flow. I used one of those right at the remote oil cooler adaptor as this location already was dealing with impeded flow, turbulence, and I would not need to worry about waiting for back-ordered radius 90s. In other words, it was a faster way to get on track. My choice was validated when I went through scrutineering for the first time. OTA Chief Scrutineer, Derrick Cormier, was blown away by the 2000 lb pressure rated hoses he instantly recognized under the hood. No hesitation about passing that.

Coming down the side straight at Toronto Motorsports Park.  Image courtesy of Change CRAFTER services.


 

Page 1 of 4 Next Page
Bookmark and Share
Comments
sr20freak
sr20freaklink
Friday, August 17, 2012 9:11 AM
YESSSSSSSSS!!!!!!! The GAy16 is GONE!!! WOOO HOOO... oh happy day! :P (that is for you Wes for encourageing a GAy16 build in the first place.)

....on a SERious note, nice write up. I enjoy the read. :)
Long Live the SR20!
Wes Dumalski
Wes Dumalskilink
Friday, August 17, 2012 10:12 AM
George you will be happy to know I no longer OWN a GA16 car;) I am kinda bummed about not having it anymore though because I cannot bring it out to a track near you to kick your ass with it.
sr20freak
sr20freaklink
Friday, August 17, 2012 1:24 PM
Frank, don't mind Wes. This has been our sibling rivarly since the late 90's.... And how happy I am that you are rockin AWD and RWD!! :* XOXOX Love you Wes!!
Me the SR20 Freak------one of the last SR20 FF pureist.
nissannx
nissannxlink
Friday, August 17, 2012 3:07 PM
There is something very satisfying about beating expensive, high HP cars with a GA16 powered vehicle. Due to all kinds of issues, my personal track record at Shannonville is still with the GA16. Try as I might, I could not get the power of the SR20DET to connect! I'm back to CTMP (Mosport) in a couple of weeks where I expect to get my best time ever.
nissannx
nissannxlink
Monday, August 20, 2012 2:41 AM
Since the article was posted I've added the motorcycle rad fan. I was going to place it on top but realized that the way it would sit would push air rather than pull it. There was room, so it's mounted under the G Spec Performance oil cooler to pull air from the wheel well and push it through the oil cooler.

I've also created a vacuum hose header to replace the OEM unit and provide better vacuum to the blow off valve. I think it looks good and, once I hooked everything up properly, it absolutely provides better vacuum.
nissannx
nissannxlink
Thursday, September 06, 2012 3:33 PM
Canadian Tire Motorsport Park - September 1, 2012
1 minute 42.640 seconds

That's 7 seconds faster than the 1.6 litre engine. Top speed on the Andretti straight was GPS indicated 204 kph.

Yes, the swap was worth it. The car will be under 40 seconds in 2013!
sr20freak
sr20freaklink
Thursday, September 06, 2012 7:34 PM
That's what I'm talkin' about!! Good job Frank! It is too bad Wes doesn't have his GAy16 anymore, so you could show him how a real Nissan engine does things. :P
Post Comment Login or register to post a comment.

MotoIQ Proudly Presents Our Partners:



© 2018 MotoIQ.com