N8Miller

my cousin took his IROC to the track on friday and came up with some "disappointing" numbers. He is not happy with the way his car performed at all. he also said it was "missing" or falling off about 5000-5500 rpms.
here are the numbers:

RT: .683
60': 2.098
330: 6.073
1/8: 9.281
MPH: 76.10
1000:12.08
1/4: 14.42
MPH: 96.85

My cousin and i both feel that the 1/4 time should have been 14.0 or faster and the MPH should have been in the 100s.
the car has Vortec iron heads and a stock chevy crate motor intake. Would the help of an Edelbrock RPM intake and a comp cams camshaft (1500-6500RPM range) help the car much. (Tech at Comp said the cam would match the heads & intake very nicely....what do you think?)
what can you conclude about these numbers....bad for the car or right about where it should be?
thanks for the help eveyon

Mark A Shields

What crate engine is it? I got the base model one, and the cam in it sucks. So yeah a cam change would help a lot in my situation. But what's the specs on that cam?

ME Leigh

For a pretty stock car and motor those numbers are about average.

N8Miller

i am not sure of the cam specs right off hand, but it is the 330 hp motor. the auto will be a lose of power, but we estimate about 270ish to the wheels. (20% drivetrain lose estimate).
so, do you think that a cam will be the way to go?

Joshua Leslie

comp X/E 268 with Vortec heads should get you around 390hp

ME Leigh

I would say that maybe the tune is off but those numbers are still about average.

StngKlr

I think the numbers are not that far off. Maybe some timing adjustment, A/F mix., Jets (carb) etc... What about an altitude correction?

ChrisFormula355

I'd really have to doubt that. Cars in Tucson that are putting 270+HP to the wheels at the Apex dyno are running in the 13's. That is good power. My buddies el Camino dynoed at 350HP at the rear and he runs 11.40 in a 3,100 pound car, and 10.20 on a 150HP shot, and those are uncorrected Tucson times (3,100ft).

You best bet is a 268 cam, "HOT" valve spring kit, headers, RPM intake and a mild stall converter. With decent gears and a posi rear you'll be in the 13's at over 100mph easy. I was getting close to 109mph in my firebird with bone stock vortecs and the 268 cam, RPM intake, 3.73 gears and 5 speed.

five7kid

iTrader: (14)

What do you mean by "stock chevy crate motor intake"? Is it Vortec or not? If not, not good.

Also, what ignition is he using? Cutting out at high RPMs is more often than not an ignition problem.

tpi_roc

Sounds to me like you're making the torque for the ET, but not the HP for the mph...

I've ran higher MPH on a stock 305

N8Miller

ok guys, here we go:
it has an accell distributor in it with Taylor 9mm wires.
the intake just has the chevy logo (i assume its a stock one with the 330 hp motor.
also, the car has a full exhaust on it (headers--hookers, and a flowmaster cat back system.
the cam right now thats in it (again, cam with crate motor), is only geared to about 4800-5000rpms.
do you just think that the car is running out of fuel? it has dosent have a much of a fuel system upgrade on it--no mechanical fuel pump or anything.
let me know

N8Miller

anyone else????