I've got a 01 camaro with a 402 stroker turbo 400 trans only a 3200 converter ford 9" rearend 370 gears. First we'll start out as it's a ls2 block eagle crank eagle rods diamond pistons afr 225 heads fast 90 intake holley 90 TB, 85mm maf 42 lbs svo injectors kooks 1 7/8 headers y pipe with a cutout. It's about 11.5 to 1 compression texas speed 257/266 113 don't remember the exact lift. My problem is it only made 430 to the tires. I would think it should make more than that, I took it to the track and it went 11.40 at 119 with a 1.6 60 foot on motor and I sprayed a 150 shot it only went 10.70 at 125 with a 1.5 60 foot. Both of these were off the foot brake
On nitrous it only picked up 65 horse on the dyno. The car weights 3650 with me in it. It is pretty much full suspension car. It only has a racetronics fuel pump in it and it seems to drop fuel pressure to about 52 psi why am I losing fuel pressure do I need a inline pump to hold pressure? Why is it not making power it should make any suggestions? do I need better exhoust? tune seems good it drives on the street great. a/f is at 12.9 and total timing is 26 and 6 degrees pulled on nitrous.
Any help would be great
Thanks pete

 

Anyone help

 

what was afr on the spray

 

11.5 on a dyno jet

 

what kind of converter? if its a cheaper run of the mill converter...you may want to step up. But there really isnt any way to verify the converter is the issue unless you swap it.

You could make a case that the motor or tune has issues..and thats why it only made 430 and ran slow. But when you spray a 150 and it doesnt pick up....then thats two areas of poor performance that could be explained by the converter.

Vs two seperate issues motor issue AND nitrous issue.

 

I just tuned a really similar combo from tsp and it didn't make very good numbers either. But I see you have a th400 and a 9inch so it shouldn't make great numbers. I'd try a 4000 stall and see if that helps out at all if not then maybe try changing the cam. But you have to remember that At the flywheel that thing most likely does make 530-540 and your eating it all up in drive line.

So if your car had a stick in it you can add 40-50 over the th400 and 15-20 loss with the 9" over a 10 bolt so on the conservative side you'd be around 485-500 so your not under powered you just have alot of indestructible parts.The th400 uses the most power of any tranny I know of. But I would start with your converter. I would also add another fuel pump or go to a a-1000 aeromotive.

 

It's a vigalante converter but that's what I'm leaning towards

 

If you have a way to send me your tune I can take a look at it for you. If you know anyone with ls1edit, hptuners, or efilive they can pull it and you can email it to me. But I doubt it is in the tune your just eating up alot of hp.

But I would start with your converter. I would also add another fuel pump or go to a a-1000 aeromotive.

 

I will try sending you the tune that would be great. I know some one with hp tuners but will it have to be unlocked with that or can we just pull it out

 

You should be able to just pull it. I've only seen 3 locked cars and they all were tuned by a guy in town here.