01Bird_of_Prey

http://i172.photobucket.com/albums/w...prey/dyno2.jpg I've been chasing this problem for almost 2 years- I can't seem tomake over 700rwhp.

Originally,I spoke to Speed Inc about this issue and theysaid that the stock twin intercooler could be a restriction so I had a custom Spearco made and it didn't fix the problem.

Then it was the springs on the heads - fixed that, but still the same issue.

The problem is that (see below) at the top of the run (after 5800 rpms) it stops making power - there is no belt slippage, at least not enough to create this problem.

I'm beginning to wonder if it is just out of cfm- my set-up is a 410ci, afr 225, FAST intake 90/90 throttle body, cam 224 232 .581 .595 114.

I need some opinions about what the problem could be - It's driving me CRAZY!

ninetres

iTrader: (35)

ahhhhhhhhhhhhhhhhhhhh.....

the graph you posted shows over 700 rwhp. The tq is 69X.

raymond mckinney

iTrader: (4)

Damn its been along time since i've seen u around town!!

raymond mckinney

iTrader: (4)

Someone told me u got a G35, I about cried!

01Bird_of_Prey

My goal has been to make @ or over 800 rwhp but no matter what I do I stay around the low 700's I even tried a 75 shot of nitrous and only picked up 20rwhp (on the old set-up). So somethings wrong.

01Bird_of_Prey

Lies all lies - no just kidding - I was looking at buying one until I test drove it. I told the dealer that it seemed pretty slow and he slammed the hood and went inside - so that was the end of that.

01Bird_of_Prey

btw, the air/fuel on the graph is not exactly right.We were using the wideband on the BS3 the car has a cutout and the wb was in the rear.

Pro Stock John

iTrader: (34)

What tensioner setup are you running?

01Bird_of_Prey

The sdec spring setup with a 3.4 pulley

Blownramair

hmm I made 15psi (d1) with a 3.7 pulley... something not right...

2001WS6Vert

His xtra cubes will swallow a couple #'s. I say you need a bigger blower.

SVC707

iTrader: (33)

that doesnt make sense either. im running a 408 with afr 225's cam motion custom ground. @ 9psi im at 707hp 640tq on a D1SC

98turbls1

iTrader: (17)

How's the tune??? I would say that is probably what's going on unless there is a mechanical issue that we're not seeing...

NoGamesLS1

iTrader: (16)

Your not slipping a clutch are you bro?

cws T/A

iTrader: (3)

Cam looks small for a stroker

edit: Then again you have 600ft/lbs from 3750 - 6250rpms

DeltaT

iTrader: (5)

Looks like you might have a little power left in your upper end by leaning out your AFR to more like 11.6-11.8. I wouldn't be surprised if you picked up another 20HP easily.

You have some good numbers already, though...

Jim

Country Boy

iTrader: (24)

The grapgh doesnt look like its maxing out. I would assume that if the head unit maxed out, you would see a good fall off at some point and the HP and TQ curve look steady. Are you running a 2/ 3 bar speed density setup?

Slowhawk

iTrader: (12)

I'm going to say that the compression is too low.The Cam is too small and the blower is too small.That Cam would peak hp at 5400-5600rpm NA.

SVC707

iTrader: (33)

im with the cam too small. when first getting mine built everyone said my cam was too big. not anymore..... i know the D1 will max out on my setup but be it i see 707 w/ 9psi on the 4.00" pulley im not even gonna worry about it. talk to cam motion about getting yourself a new cam first is what id do. im on a 24x/25x

lasvegasgs

iTrader: (4)

Maybe its time to rebuild the blower? I read that somewhere on corvette forum so guy couldnt make over 480rwhp on 8psi or even on 12psi. ended up selling the blower and getting a new one.