my dyno, does this sound right??
Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
*sigh* +1 for catching it -2 for being an idiot 
12 Second Club
Joined: Jun 2005
Posts: 509
Likes: 0
From: Warner Robins Ga
Dyno #s mean **** to me. I'm sure I don't put down over 275 to the wheels but I have smoked many a car that that has over 300. Take it to the track where ETs and Mph really matter.
My car put down like 260/300ish stock motor/intake/exhaust with a built transmission. I'd have to dig up the sheet to know the exact numbers. Mine's an A4.
Edit: I had a delteq too so maybe that helps a little???
Edit: I had a delteq too so maybe that helps a little???
Last edited by sweet-94z28; Feb 12, 2009 at 07:14 AM.
TECH Apprentice
Joined: Oct 2008
Posts: 324
Likes: 0
From: Aurora Ill
I thought all F-bodies from 93-97 had alum heads and that the B-bodies had the iron heads?
Dyno #s mean **** to me. I'm sure I don't put down over 275 to the wheels but I have smoked many a car that that has over 300. Take it to the track where ETs and Mph really matter.
Dyno #s mean **** to me. I'm sure I don't put down over 275 to the wheels but I have smoked many a car that that has over 300. Take it to the track where ETs and Mph really matter.
TECH Apprentice
Joined: Oct 2008
Posts: 324
Likes: 0
From: Aurora Ill
I thought all F-bodies from 93-97 had alum heads and that the B-bodies had the iron heads?
Dyno #s mean **** to me. I'm sure I don't put down over 275 to the wheels but I have smoked many a car that that has over 300. Take it to the track where ETs and Mph really matter.
Dyno #s mean **** to me. I'm sure I don't put down over 275 to the wheels but I have smoked many a car that that has over 300. Take it to the track where ETs and Mph really matter.
OP ditch the flowmaster!!! Or atleast get a cutout because the flomaster is a proven piece of crap! I remember when i had the flow as my first mod, thought it wasnt loud enough and muffler shop told me to go with the Dynomax Ultra Flo. In the same weather i consistently dropped almost a tenth of e.t. over the flow! Not sayin get the ultra flo but get rid of flowmaster!
Also 248hp isnt to bad with what few mods are done... Headers and CAI (not even gonna count the flowmaster) Check my sig... Ive dyno'd exactly 265hp on two different dynos, lets see what i have more... airfoil(2hp maybe?) dumped after y-pipe(10hp) also my tire and wheel combo is lighter than yours wich takes less power to turn and results in higher dyno numbers(5hp?) and there ya go par on with me!
You should also look into getting a knock module since you have the headers... knock sensor will pick up the noise and confuse it as false knock and retard your timing, could be losing you a few there.
Umm NO! All Camaro and Corvette LT1's have the aluminum heads, impalas had the steel! And also he had to have been given the right one since he didnt have to mess with the pin on the cam. 92-94 had different dowel pin lengths on the cam for the opti. Also another reason the 96-97's were rated higher is because they had a better flowing exhaust from the factory.(2 catalytic converters vs trying to flow through one on the 93-95)
OP ditch the flowmaster!!! Or atleast get a cutout because the flomaster is a proven piece of crap! I remember when i had the flow as my first mod, thought it wasnt loud enough and muffler shop told me to go with the Dynomax Ultra Flo. In the same weather i consistently dropped almost a tenth of e.t. over the flow! Not sayin get the ultra flo but get rid of flowmaster!
Also 248hp isnt to bad with what few mods are done... Headers and CAI (not even gonna count the flowmaster) Check my sig... Ive dyno'd exactly 265hp on two different dynos, lets see what i have more... airfoil(2hp maybe?) dumped after y-pipe(10hp) also my tire and wheel combo is lighter than yours wich takes less power to turn and results in higher dyno numbers(5hp?) and there ya go par on with me!
You should also look into getting a knock module since you have the headers... knock sensor will pick up the noise and confuse it as false knock and retard your timing, could be losing you a few there.
OP ditch the flowmaster!!! Or atleast get a cutout because the flomaster is a proven piece of crap! I remember when i had the flow as my first mod, thought it wasnt loud enough and muffler shop told me to go with the Dynomax Ultra Flo. In the same weather i consistently dropped almost a tenth of e.t. over the flow! Not sayin get the ultra flo but get rid of flowmaster!
Also 248hp isnt to bad with what few mods are done... Headers and CAI (not even gonna count the flowmaster) Check my sig... Ive dyno'd exactly 265hp on two different dynos, lets see what i have more... airfoil(2hp maybe?) dumped after y-pipe(10hp) also my tire and wheel combo is lighter than yours wich takes less power to turn and results in higher dyno numbers(5hp?) and there ya go par on with me!
You should also look into getting a knock module since you have the headers... knock sensor will pick up the noise and confuse it as false knock and retard your timing, could be losing you a few there.
I've heard that they flow a little better stock for stock, but they are harder to port and can't be taken as far,maybe they're significantly cheaper, but I really don't know the reason, I'd like to know also, hopefully someone that does know can chime in. to the OP, those number sound a little low, but not by a whole lot. I;d like to dyno my car, just to see what it says the ol bird is puttin down.
TECH Apprentice
Joined: Oct 2008
Posts: 324
Likes: 0
From: Aurora Ill
I aswell am curious to know more about the impala heads. Not that id ever run a steel head when I all ready have aluminum heads,but just for future reference. Now that I think back,I had a guy with a red z try to race me last year and his lt1 had steel heads on it. Hmmmmmm ....wonder if they were ported impala heads?!