emmett77

Could you please PM the tuner you used....for future reference.

philadd

The problem is not with the bolt-ons that you've installed. I would consider other factors. As mentioned, the tune or dyno could be at fault. But unless you did a base run, you don't know if your car was already suffering from this problem before the headers and tune.

dbgoodwin

I used mayhem motorsports in Raleigh nc for the tune. I didn't do any base run prior to this, it just seems odd that the car made so much torque but no power at all

PEETYZ

Have you had it to track or another dyno by chance?

Even a chance to see how it compares to another local car that is similar mods or stock?

Our local Dyno is a dynocom that is about 7% lower than the dynojets in the area.

Cheesecake 07

Zachly.

How's the car feel? After I did Kooks 1 7/8" LT's, OR X, CAI and tune…first on-ramp I mashed it on, it blew off the tires and gave me a holy sh*t second. Super noticeable difference the way it pulled through the gears. My 04's numbers..

363rwhp/355rwtq Bone stock
394rwhp/377rwtq Bolt ons

Same dyno(Dynojet). Under the curve numbers matched or bettered the peak numbers for most of the power band.

04silverZ06

Is it just me or os there a pattern of stock '04's dynoing higher than other year C5Z's?

Toque

Here is my 04 Z06 stock Dyno sheet from April 2004.
I don't think its any different than any 2002-2004 Z06.

ZFORME

2004 Z06 w/ 1 3/4 LG Super Pro headers and a Calloway Honker with a conservative tune made 392 rear wheel hp. It was at 360 hp stock.

04silverZ06

When you guys say you changed the headers - are you all also changing the cats and X pipe or just the headers?

I'm wondering how much of a gain the cats and X pipe are worth.

thanks

C5Dobie

He was on a mustang brand dyno which typically is the lowest of them all fwiw

philadd

Long-tube headers won't bolt up to the stock cats and H-pipe, so they usually come with their own X-pipe, in either catted or non-catted form. You'd be hard-pressed to find someone with LT headers mated to the stock H-pipe, since it would not be a bolt-on affair.

TGO

01 Z06. Kooks 1 7/8, honker, no cats, FAST, TPIS TB, tune 403.x rwhp and 406.x tq.

dbgoodwin

Dyno jet?

TGO

I have to check the sheet, which is in the car which I am not doing right now...but I don't believe it was a DJ.

bada

On a mustang dyno mine made 355Hp. 1-3/4 headers, Varaam CAI, and tune. Car runs great & pulls hard.

Supercharged111

Don't overlook the FAST, good for 13whp on a stock LS6.

http://www.cadillacforums.com/forums...ke-w-90mm.html

Thread is old, used to have dyno sheets posted.

D. Lil

Search my thread for my dyno numbers.

I think a little has to do with how many miles are on your engine. I have Vararam, Kooks 1 7/8s headers, Kooks 3" catless X, and B&B Bullet exhaust. Made 415 to the wheels and correction factor was almost 0 that day. 407tq I think. 2004 z06 with 16.5k miles

C5Dobie

You think higher miles hurts the engine? No way! Not as long as the proper maintenance was done, some - like my G8 - gain some hp, I ran 3whp & 2rwtq higher on a dyno. @ 110,000 miles as I did @ 72,000 miles when I had headers installed

TGO

Don't get all worried about dyno numbers. They all read differently. **** I've seen them read differently on the same car without any changes other than rolling it off, and then back on the machine later on.

It's a tool to measure gains. Nothing more. There's way too many variables to consider any reading truly accurate and the machines themselves aren't even 100% accurate.

Get a stock baseline, add mods, measure difference. If you want numbers that really count, take it to the track and get some timeslips.

philadd

While this is 100% true, his dyno results indicate that there is some kind of problem somewhere, as he made 360whp/385wtq. If those numbers were reversed and he made 385whp/360wtq, I would think that it was perfectly normal.