Potential horsepower??
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 31,950
Likes: 27
From: Columbus OH
Elite Member
Cruise-In III Veteran
St. Jude Donor '09
Potential horsepower??
If I stroked my LT4 to 383, ported the heads and intake, bigger TB, and headers, what do you think the RWHP would be?
Melting Slicks
Joined: Aug 2000
Posts: 2,009
Likes: 1
From: Springfield MO
Re: Potential horsepower?? (NotSlo)
anywhere from 250 to 500. It depends on many many other aspects. Comp ratio, cam, tranny, exhaust, tune, ect ect ect. Can you give us any more info. I know guys with 355's making close to 400 at the wheels.
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 31,950
Likes: 27
From: Columbus OH
Elite Member
Cruise-In III Veteran
St. Jude Donor '09
Re: Potential horsepower?? (AS84)
It's already dynoed around 320 at the wheels with minor mods. For the most part it's a stock LT4.
[Modified by NotSlo, 4:17 PM 2/6/2003]
[Modified by NotSlo, 4:17 PM 2/6/2003]
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 31,950
Likes: 27
From: Columbus OH
Elite Member
Cruise-In III Veteran
St. Jude Donor '09
Re: Potential horsepower?? (vader86)
Not sure I guess. I was thinking about the hotcam. I called an engine shop today and they get approx 2500 to stroke it. I guess that the cam would be based on that. I need to learn more about this so I go in there educated.
Here's the shop I'm looking at http://www.fowlerengines.com/index.htm
Here's the shop I'm looking at http://www.fowlerengines.com/index.htm
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Potential horsepower?? (NotSlo)
Well a 383+ci engine usually likes a cam with around 220 degrees of duration on both sides, so id say the hotcam would be the minimum cam id run with (218/228).
I dont remember GlockLT4s combo when he had a 383 with Hotcam, you might want to run a couple searches for his old Tech engine threads and read that stuff.
But i would imagine you would be in the 400rwhp range.
I dont remember GlockLT4s combo when he had a 383 with Hotcam, you might want to run a couple searches for his old Tech engine threads and read that stuff.
But i would imagine you would be in the 400rwhp range.
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 31,950
Likes: 27
From: Columbus OH
Elite Member
Cruise-In III Veteran
St. Jude Donor '09
Re: Potential horsepower?? (vader86)
Cool. So that's the bottom end work. With ported heads, ported intake and a bigger TB along with headers, whattya think?
Well a 383+ci engine usually likes a cam with around 220 degrees of duration on both sides, so id say the hotcam would be the minimum cam id run with (218/228).
I dont remember GlockLT4s combo when he had a 383 with Hotcam, you might want to run a couple searches for his old Tech engine threads and read that stuff.
But i would imagine you would be in the 400rwhp range.
I dont remember GlockLT4s combo when he had a 383 with Hotcam, you might want to run a couple searches for his old Tech engine threads and read that stuff.
But i would imagine you would be in the 400rwhp range.
Racer
Joined: Aug 2001
Posts: 488
Likes: 0
From: Rockwall TX
Re: Potential horsepower?? (NotSlo)
I have: 383 Lt-1
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Team Owner
Joined: Aug 2000
Posts: 31,950
Likes: 27
From: Columbus OH
Elite Member
Cruise-In III Veteran
St. Jude Donor '09
Re: Potential horsepower?? (Kehrer923)
Nice! That would certainly be plenty of power! Thanks!
I have: 383 Lt-1
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
Drifting
Joined: Dec 2002
Posts: 1,861
Likes: 4
From: Houston TX
Re: Potential horsepower?? (Kehrer923)
Ok, a few things first...
1) cam lift is determined by a combination of engine displacement, engine speed at peak HP, and head flow.
2) cam duration is determined by a combination of engine displacement and engine speed at peak HP.
3) cam lobe separation angle is chosen to determine the rpm spread between peak TQ and peak HP (there is no real formula for it though)
4) not knowing what cam, what engine speed, what head flow, what intake flow, what exhaust size, what compression ratio, what weight crank, rods, pistons, flywheel, etc makes it impossible to say what kind of power the engine will make. I've worked on 350's that can only flow 205 cfm on the intake side but make 410 flywheel HP. I have also worked on 350's that flow 390 cfm on the intake side and make 850 HP @ 9700 rpm.
I would assume this 500 HP estimate from the computer program is flywheel horsepower.
1) cam lift is determined by a combination of engine displacement, engine speed at peak HP, and head flow.
2) cam duration is determined by a combination of engine displacement and engine speed at peak HP.
3) cam lobe separation angle is chosen to determine the rpm spread between peak TQ and peak HP (there is no real formula for it though)
4) not knowing what cam, what engine speed, what head flow, what intake flow, what exhaust size, what compression ratio, what weight crank, rods, pistons, flywheel, etc makes it impossible to say what kind of power the engine will make. I've worked on 350's that can only flow 205 cfm on the intake side but make 410 flywheel HP. I have also worked on 350's that flow 390 cfm on the intake side and make 850 HP @ 9700 rpm.
I have: 383 Lt-1
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
AFR 195 heads
TPIS ZZ-x cam .558 .558 238 238 112
long tubes
and i havent had a chance to put mine on the dyno but the laptop says it should have around 500
More than anything is getting it tuned right witch i am having trouble with due to my 93 ECM
