This motor is in the car now, I just wanted to share some pics in sequence as the job progressed and the nearly final results to date so far!
This is a street /track use everyday driver with a LS2 block and a stroked 402 with a ARE dry sump system, electric water pump, TPIS throttle body and their ported out LS6 intake.

Chapter 1
I'm really getting exited now! The motor is together and AFR 225 heads are on.























Chapter 2
Here is a few more pics, we are going to upgrade to a racetronix fuel pump . It sounded wicked when we fired it:cool2: ...




















Chapter 3
The car is working flawlessly and has not had a single code or glitch. FTR built and istalled a LS2 402 stroker motor with hydraulic cam. It feels stronger than the previous 422 and seems to like higher RPM more than the LS1 did.

We strapped her down on the dyno and ran a couple of base line tuning runs...fuel ratio, etc. After sorting that out Wade ran a n/a pass up to 7000RPM, which netted a 485 rwhp and a 440 rwtq, but it fell off sharply at 6500 rpm. It was still climbing up to this point so the new aluminum BBK air bridge may be restricting air flow into the TPIS throttle body, the BBK has a smaller diameter opening on both ends of the bridge due to the more than 1/4 inch thickness of the aluminum. That was a concern that Wade mentioned previously so we will do a few more tweaks and put on the old carbon fiber air bridge and try again later this week. It may also be that the M.A.F. is maxed out. We need to fool around with a few things to get that sorted out.

According to the dyno chart it is up 25 to 30 h.p. right across the board over the 422. On a comparision graph the new motor gets up to well over 400 hp almost immediately and goes on a nice up hill incline until 6500 rpm where it dives quickly...the problem area. This motor seems to want to pull all of the way up to 7000 rpm. We may see over 500 hp at the rear wheels after changing the air bridge and some more tuning, 15 hp is not that far off.

Surprisingly even the torque is up over what it was. We expected the smaller displacement motor (402) to have less torque but it is over the top of the old chart by about 20 ft lbs. across the graph and like the h.p. it gets up quicker and stays flatter across the top for longer.

All in all a good day with promising results. Ultimately the track will show the benefits of these results, I'm looking forward to that, but for an everyday street car I'm happy with the results.

 

Nice. I'm anxiously waiting to install my LS2 402 soon. What MAF are running and have you though of the FAST 90mm setup?

 

It has the SLP MAF.
Yes I am seriously concidering switching to the FAST 90mm throttle body and intake. I ordered the TPIS set up last season and it was still up in the air which setup worked better. I picked the wrong one, oh well back to the drawing board. I think I may see a gain of 15 rwhp with the FAST set up. Would you agree?

 

Yes


Nice numbers

 

Definitely so. But order the Nick Williams TB, much nicer than the others and cheaper with no core charge. It's odd you think the 85mm MAF is maxed out. I will be running a 01 ZO6 MAF that is descreened and it should not max out. Did you use Cometic head gaskets?

 

Yes to the Cometic head gasket. I'm not sure about the MAF, it seems that the motor is choking out at 6500, thats why I concidered it.

 

What injectors are you running and what duty cycle are they at at WOT?

 

Not necessarily. You would have the first engine ever to pick up a reasonable amount of power using the FAST 90/90 over the TPiS Oval setup. Not impossible, but certainly the first Ive seen (and I pay attention )

 

Delphi 36 lb/h, the white ones. I have a racetronix fuel pump and wiring harness. I was using 42 lb injectors untill we upgraded the pump, then we went back to the Delphi's. I'm not sure of the duty cycle but Wade said that they were in a good range so that he can adjust them properly. I guess he meant that they are at a level that can be controlled up and down sufficiently.

 

Hi Don

Great numbers!!

I think you should look at the FAST intake and ditch the MAF altogether. Go with a speed density tune, use a different air bridge and you'll have better drivability and make even more power

 

what cam do you have?

 

Nice! A few more tuning tweaks and you will be right at 500 to the wheels. I hope I get numbers I am happy with when I get my stroker in my LT1!

 

Thanks Chris, these are options that we are looking into but we are just taking one step at a time. The motor has not even been broken in yet, it has 600 miles on it, even just braking in may make a difference. I think when all is said and done and we have played around with a few of the options and tweaked the tuning etc, we will be well over 500 rwhp. Not to bad for an everyday driver that still gets almost 25 mpg on the highway.

 

Congrats on the numbers...

Seems like the new package is very efficient considering the smaller displacement etc.

I'm curious what cam you are running and what ICL you installed it on?
Also, I am curious if you are running stock or aftermarket rocker arms....You MIGHT be experiencing valve float at 6500 if you are running heavy aftermarket rockers...it is very common.

Regarding the intake, I have had quite a few conversations with Myron at TPIS....He says his Oval TB ported LS6 intake will make significantly more TQ in the middle of the curve versus a FAST 90, but the FAST 90 makes more HP upstairs and is a better piece for drag racing (versus road racing) due to that fact. I have a feeling the FAST 90 on that cubic inch with a high flowing cylinder head could be worth 10+ more RWHP upstairs and perhaps over 15 if you had it ported. (Also, I question how much TQ you may or may not lose in the middle of the curve). Thats getting to be a sizable gain and worthy of consideration seeing as you could always sell whichever set-up didn't work as well.

Anyway....good luck, keep us posted as to your results, and congrats once again on what sounds like a very nice package.

Tony M.

 

Great results..

 

what cam!?!?!?

 

Clean set up, I especially like those valve covers!

 

I'm not sure exactly. The performance shop picked it out and I don't really remember the exact numbers so I wouldn't want to hazard a guess.

 

I want one of those.

 

is this a SLP 402