Z06Vette.com - Corvette Z06 Forum - My procharged Z went on the dyno....come analyze!!!!

Pakisho · 08-11-2005, 09:43 PM

Mods are Andys forged shortblock, stock heads, stock cam, long tubes with cats, stock exhaust. D1SC blower, ATI twin intercooler setup, but with Andy's upgraded bracket.

Car hit 12lbs of boost at redline, btw.

Seems like the Ati intercoolers arnt cutting it, what do you think? Ambient temps were 95 degrees, intake temps around 150.

My tuner recommended switching to a bigger pulley, would reduce heat and allow him to run more timing, actually making more power with a little less boost. Alternatively, the single intercooler would probably be more efficient.

Comments? Notice it kinda lay down past 5k rpms. It kept pulling timing, probably runs much better on the street where there is more air-flow.

This was done on a dynapack, btw.

The green line shows the after-results, notice how much torque we picked up under the curve. Car is definitely more flexible, pulls great!

Oz

BBaxR6 · 08-11-2005, 10:16 PM

Lol, saw this post on CSI. Yep, ATI twin intercoolers are teh suck. Call Andy and get his front mount STAT! Your car got a cam?? Cause, IT SHOULD!

Pakisho · 08-11-2005, 10:23 PM

Lmao, youre on there too!!! I love that forum.

Cam is stock, reading>Yuo?

And yeah, i think the front mount is good idea.

case2307 · 08-11-2005, 10:25 PM

Swap the stock cam out for a nice blower cam...should see some nice results.

BBaxR6 · 08-11-2005, 10:29 PM

At your power level, you might consider a F.A.S.T. intake manifold as well. I installed mine when my only mod was headers, and it didn't make much difference, but, once you add 10psi of boost, that manifold starts making a lot of sense. I suspect that just the 78mm swapped onto your car would get you at least 20whp (and one hell of a lot easier than a cam install). I'm prolly gonna try to swap to an LS2 throttle body before too long, see if I get any gains from that at my power level or not.

Pakisho · 08-12-2005, 01:24 AM

Well, for now Im going to add dual springs (suspecting valve float past 5k), change the plugs and wires, and re-do it, see what it does. After that, i will look into the fmic.

KCMAGS · 08-12-2005, 08:54 AM

Quote:

Originally Posted by Pakisho

Well, for now Im going to add dual springs (suspecting valve float past 5k), change the plugs and wires, and re-do it, see what it does. After that, i will look into the fmic.

Many cars make 550+ with stock springs. I'd spend the money some place else. ECS has a nice alky set up that is a proven +++.

**FRC Tom** · 08-12-2005, 03:28 PM

Intake air temps are killing you.

At 149 degrees 6 degrees of timing are pulled.

I've installed 7" spal fans on the back of my ICs when I turned my boost up.

I also layed the rad. back so the S/C gets cooler air.

http://www.c5frc.com/photogallery/Pr...procharger.htm

Pakisho · 08-12-2005, 04:43 PM

Nice, Tom, thanks!

I will be addressing the intake temps right after I do the valvesprings.

BBaxR6 · 08-12-2005, 05:36 PM

Quote:

Originally Posted by KCMAGS

Many cars make 550+ with stock springs. I'd spend the money some place else. ECS has a nice alky set up that is a proven +++.

But I bet not boosted cars. Blown cars have extra pressure trying to force the valve open (on the intake at least), so stiffer springs sound like quite a reasonable idea.

Synergy Motorsp · 08-13-2005, 01:54 AM

A stiffer spring is always a good idea. Those twins never do justice to a good blower setup.

Rick

ForceFedZ06 · 08-13-2005, 10:18 AM

Those numbers seem Very Weak. This is a Forged Bottom ened car isn't it? At 12lbs of boost It should be well over 600RWHP. I was making More power than that on a stock bottom ended Car with only 8lbs of boost. The heat is definately a Big issue. I think all of the above mentioned mods are a good idea. Get a front mount Single IC, A nice blower Cam (and springs obviously) and An Alky kit to bring down the IAT, and pull more timing. Good luck.

Synergy Motorsp · 08-13-2005, 10:23 AM

Quote:

Originally Posted by ForceFedZ06

Those numbers seem Very Weak. This is a Forged Bottom ened car isn't it? At 12lbs of boost It should be well over 600RWHP. I was making More power than that on a stock bottom ended Car with only 8lbs of boost. The heat is definately a Big issue. I think all of the above mentioned mods are a good idea. Get a front mount Single IC, A nice blower Cam (and springs obviously) and An Alky kit to bring down the IAT, and pull more timing. Good luck.

I fully agree, I tuned other similar cars on less boost that made well over 600+. ITs just a matter of heat, and until it gets controlled, you cant make power.

Rick

S-TEE · 08-13-2005, 01:12 PM

Quote:

Originally Posted by FRC Tom

I also layed the rad. back so the S/C gets cooler air.

Tom,

Just noticed you have screened cutout holes in the fenderwell. Pros & Cons of that mod? Better cooling? More tire debris? First time I've seen that on one of the Z's...

Scott

Man 'O War · 08-14-2005, 11:12 PM

Did the guys operating the dyno have their large fans turned on higher moving air over your intercoolers as well as the radiator?