98 Z28 BONE STOCK dyno #s
Thread Starter
Registered User
Joined: Feb 2003
Posts: 159
From: utah
98 Z28 BONE STOCK dyno #s
tested on a dynojet dyno. my bone stock 98Z28 A4 2.73 made 285hp and 312 torque. pretty average numbers. Im going to do some cold air mods and a cutout and try again.
Registered User
Joined: Sep 2002
Posts: 25
From: Las Vegas, Nevada
Originally posted by stik6shift98
nice
cutout will defintly give u ome more hp about 5rwhp
nice
cutout will defintly give u ome more hp about 5rwhp
More than that! My '99 Z28 put down (on a DynoJet)
290.29 RWHP
303.36 RQTQ
With just a Whisper lid & K&N filter with the electric 3" cutout in the CLOSED position.
Then made two more pulls with the electric cutout OPEN and the results below:
306.28 RWHP
317.27 RWTQ
A 16 RWHP gain just from the 3" cutout! Similar results have been documented before with other LS1 cars. This was here in Las Vegas where the elevation is 2300 ft so the numbers are nothing to brag about, but that cutout is the best bang for the buck I ever purchased. (electrically operated is the shiznitz)
Banned
Joined: Mar 2002
Posts: 4,254
From: Darien, IL, usa (Chicago W.Suburbs)
Originally posted by ChevyGoldfinger
Oh, forgot to mention mine is an A4 too.
Cutout= great value for the HP gain.
Oh, forgot to mention mine is an A4 too.
Cutout= great value for the HP gain.
byt anyways yes u defitnly want to get a cutout
Registered User
Joined: Apr 2003
Posts: 5
From: Houston, TX
Originally posted by stik6shift98
nice
cutout will defintly give u ome more hp about 5rwhp
nice
cutout will defintly give u ome more hp about 5rwhp
a cutout will give you ATLEAST 15RWHP...hell my dynomouth exhaust gave me 15RWHP...here is a dyno comparing my car with all my mods before and after the dynomouth.
http://www.planetcpp.com/~adrian/ls1/dynocompare.jpg
Registered User
Joined: Dec 2002
Posts: 134
From: California
ok...
Why is it our cars, z28/SS is rated at above 300 hp, and when dyno'd BELOW IT?
It's starting to get on my nerves, I see it more and more...someone told me he saw a stock ss pull 280hp on dyno. That is pretty sad considering SS's stock are supposed to be pulling in '325'.
That's a different of almost 50 hp.
I have an ss, and I like to think of my car being above 300... but it probably isn't.
Dissapointing...
Why is it our cars, z28/SS is rated at above 300 hp, and when dyno'd BELOW IT?
It's starting to get on my nerves, I see it more and more...someone told me he saw a stock ss pull 280hp on dyno. That is pretty sad considering SS's stock are supposed to be pulling in '325'.
That's a different of almost 50 hp.
I have an ss, and I like to think of my car being above 300... but it probably isn't.
Dissapointing...
Registered User
Joined: Apr 2003
Posts: 28
Originally posted by tainted
ok...
Why is it our cars, z28/SS is rated at above 300 hp, and when dyno'd BELOW IT?
It's starting to get on my nerves, I see it more and more...someone told me he saw a stock ss pull 280hp on dyno. That is pretty sad considering SS's stock are supposed to be pulling in '325'.
That's a different of almost 50 hp.
I have an ss, and I like to think of my car being above 300... but it probably isn't.
Dissapointing...
ok...
Why is it our cars, z28/SS is rated at above 300 hp, and when dyno'd BELOW IT?
It's starting to get on my nerves, I see it more and more...someone told me he saw a stock ss pull 280hp on dyno. That is pretty sad considering SS's stock are supposed to be pulling in '325'.
That's a different of almost 50 hp.
I have an ss, and I like to think of my car being above 300... but it probably isn't.
Dissapointing...
If the Z28 pulled 285 rwhp through an A4 then that's about 15 hp more at the fly wheel than the factory's claim.
Registered User
Joined: Mar 2001
Posts: 404
From: rochester,MI, US
When GM claims 305 hp on a Z28, that means that GM is 100% sure that every single Z28 that leaves the assembly line will put 305 to the flywheel. This is where Ford got busted when they claimed certain horsepower, but the production variances caused some to dip below claimed hp #s.........and this is very bad business.
Registered User
Joined: May 1999
Posts: 302
From: Pittsburgh, PA
Originally posted by guywidiroc
This is where Ford got busted when they claimed certain horsepower, but the production variances caused some to dip below claimed hp #s.........and this is very bad business.
This is where Ford got busted when they claimed certain horsepower, but the production variances caused some to dip below claimed hp #s.........and this is very bad business.
IE. 99 Cobra
Thread
Thread Starter
Forum
Replies
Last Post