Mark's LS2 2nd Gen Camaro build by Marktainium

6 minute(s) of a 242 minute read

Been a while since my last post. Alot has been done. I've put about 600 miles on the car and have had a few bugs to work out. The interior is all done. I've had one fuel pump go bad, so since I don't like just doing straight repairs, I dropped the tank, cut it open, and welded in some baffles and made proper mounts for the pumps. I also had a weird braking issue. After a right hand turn, I would lose a bit of brake pedal. It was like the next brake application had more freepedal than before. Only after a right turn though. I thought it through like a detective and figured it out. The rear axle end play is set by a bushing that is held between the axles in my true trak posi. I found that the spacer allowed 25 thou' of end play. Enough for the axles to shift thereby pushing the pads back in my calipers and giving that extra travel on my brake pedal. Took it apart, measured the end play with a feeler gauge, then just made a new spacer on the lathe out of stainless. Problem solved.

The big news!!!

Removed my FMU (rising rate fuel pressure regulator) installed 52# injectors, and DYNO tuned.

On a conservative Mustang Dyno, the car put out 462rwhp, and 459ft-lbs torque.

5/19/2010

Took it to the track this weekend...

6/1/2010

Well the procharger is coming off, and the Twin Turbo's are going on. I'm going to sell my Procharger setup, headers, maybe even the injectors and tune. If anyone is interested, PM me, details of the parts are all in this thread. -make an offer-.

7/7/2010

Enough said?!?!?!?

7/24/2010

Started the next stage of my build this week. Gotta say sorry to frojoe for taking back the manifolds I gave him.
Building all forged 402, low compression, Precision hp 6265's w/.82 ar. Using 'vette manifolds.

7/25/2010

Just ordered my ARP main cap and head studs today along with an oil pump and oil filter sandwich plate for my oil cooler...$684... man the little things kill ya!!!

10/22/2010

I finally found the info I was looking for for a TMAP sensor for my Turbo build...

Cobalt ss TMAP sensor number 90423637 (2.5 BAR)
Pigtail for TMAP sensor number 88988320

Wiring Diagram

Borrowed this from NJHK at cobaltss.net.....

11/4/2010

I'm assembling, or trying to assemble, the new motor. I got a Scat 4" stroker with H beam rods and -32cc dish racetec forged pistons. I was hanging the rods on the pistons when I ran into a snag. Has anyone ever seen this? The small end of the rod hits the underside of the piston. I measured and found that the clearance between the piston pin and the piston is the same or smaller than the size of the end of the rod. Weird huh? I have calls in to Scat and Racetec to figure this out. I will report back with the findings. Just goes to show that even when you buy all your parts from one place that are supposed to work together without machining, well, they don't. Measure everything!!! FYI there is supposed to be .050" clearance between the rod end and piston.

1/25/2011

Got the call from racetec. It seems somewhere along the line from where I initially ordered my rotating assembly from to actually receiving it someone sold me or included a piston set that was not reccommended for the numbers or boost that I am looking to achieve. Mike at Racetec was vigilant and realized this before sending back the wrong pistons I should be made aware of this. The pistons I had originally got were autotec brand, which are rated to a lower hp rating. He explained to me in great detail the differences and that he was first and foremost concerned that I have the correct parts, not just parts that would work, but parts that would last. Customer service is still alive and kicking in some places. Thanks Mike for showing me that. As far as the last piston issue, the engineers are addressing that as well, so others won't have this issue. He believes there may have been a forging issue there but don't quote me on that.

2/25/2011

I decided to lower my radiator 3" so that I can put my intercooler piping over the top of the radiator and straight into the throttle body. On the procharger setup I used a side to side intercooler, but with the twin turbo's I decided to go with 2 seperate top to bottom 12"x12"x4" intercoolers (core size). I hope this doesn't end up getting filed under the "seemed like a good idea at the time" section. I've been taking lot's of pic's for this and will add them asap.