Numbers seem wrong for newly built ls1, Help!!
Thread Starter
Navigator
Joined: Mar 2014
Posts: 9
Likes: 0
Numbers seem wrong for newly built ls1, Help!!
99 corvette with these mods:
Ls6 243 heads, comp cam xer273 224/230 581'/588' 114lsa, lsx FAST intake, slp longtubes, bbk 82mm throttle body, air intake, trans has 3200 stall with shift kit, 3.42 gear
Took it to get it tuned and it only made 355rwhp.
I've seen same setups on here with same cam and heads making over 400rwhp, my question is do the numbers seem right for my setup,something seems off.
Ls6 243 heads, comp cam xer273 224/230 581'/588' 114lsa, lsx FAST intake, slp longtubes, bbk 82mm throttle body, air intake, trans has 3200 stall with shift kit, 3.42 gear
Took it to get it tuned and it only made 355rwhp.
I've seen same setups on here with same cam and heads making over 400rwhp, my question is do the numbers seem right for my setup,something seems off.
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Was it a Mustang or DynoJet? IIRC the Mustangs read much lower.
We made 372 with our stock lift/duration Stocker cam and that was through a Yank SS4000 on a DynoJet. I would think with a H/C you should have been significantly higher.
Scott
We made 372 with our stock lift/duration Stocker cam and that was through a Yank SS4000 on a DynoJet. I would think with a H/C you should have been significantly higher.
Scott
Racer
Joined: Aug 2007
Posts: 311
Likes: 5
From: Montgomery Alabama
My 408 A4 build with a SS4000 stall and 3.42 gears made on conservative tune 471 rwhp and 453 torque. making 605 hp at the flywheel.
Callies Compstar Crank 4340 4.00" ARP Main Bolts
Rods 6.125 ARP bolts
Pistons 4.030 -3cc
247cc Fully CNC Ported Intake Runners
84cc Fully CNC Ported Exhaust Runners
Spring Kit Rated To .675" Lift
68cc CNC Machined Chambers
2.120" Intake / 1.600" Stainless Valve
Hyd Roller Cam 239/242 .649/.610 111.5 LSA
Comp Roller Rockers Arm Ultra Gold 1.72
7.450 Chromemoly Pushrods
Nick Williams 102 TB
Fast 102 Intake
Fast Fuel Rails 60lbs injectors
4L65E Level V RPM tran
Yank SS4000 Stall
Stage II differential, C6 Z06 left and right axles, micropolished gears, HD clutches and springs,
gear ratio: 3.42
ECS trans brace
Callies Compstar Crank 4340 4.00" ARP Main Bolts
Rods 6.125 ARP bolts
Pistons 4.030 -3cc
247cc Fully CNC Ported Intake Runners
84cc Fully CNC Ported Exhaust Runners
Spring Kit Rated To .675" Lift
68cc CNC Machined Chambers
2.120" Intake / 1.600" Stainless Valve
Hyd Roller Cam 239/242 .649/.610 111.5 LSA
Comp Roller Rockers Arm Ultra Gold 1.72
7.450 Chromemoly Pushrods
Nick Williams 102 TB
Fast 102 Intake
Fast Fuel Rails 60lbs injectors
4L65E Level V RPM tran
Yank SS4000 Stall
Stage II differential, C6 Z06 left and right axles, micropolished gears, HD clutches and springs,
gear ratio: 3.42
ECS trans brace
Last edited by 04tripleblkcoupe; Mar 19, 2014 at 05:11 PM. Reason: added parts
Intermediate
Joined: Nov 2013
Posts: 46
Likes: 0
I made 381hp and 381tq with a blackwing, American racing long tube with hi flow cats and I believe the same cam not sure since I got the car with the work done already but those are the specs DRM gave me.
So through an auto with a stall that's not bad. Like has been said. Bring it to the track and see what it does.
So through an auto with a stall that's not bad. Like has been said. Bring it to the track and see what it does.
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
Pro
Joined: Jun 2011
Posts: 556
Likes: 0
I made 348 rwhp back in the day from a 98 Camaro that had hand ported 241 heads(they weren't the 98 castings), 222/226 cam, slp long tubes, borla cat back, FLP built 4l60e, 3.42 gear, yank ss 4000 stall converter, lid, ls6 intake, ported throttle body, slp MAF and im sure there are a couple little boltons i left out.
Best time was 11.6@116 with 245/50 bfg drag radials, with 1.60s 60ft, leaving out the hole off idle, then punching it. Take dyno numbers with a grain of salt. The drag strip is the best dyno.
EDIT: There was a C5 on the same dyno that day getting tuned by the same tuner with a heads and cam package similar to mine, but smaller stall speed that made 2-3 more rwhp than me.
Best time was 11.6@116 with 245/50 bfg drag radials, with 1.60s 60ft, leaving out the hole off idle, then punching it. Take dyno numbers with a grain of salt. The drag strip is the best dyno.
EDIT: There was a C5 on the same dyno that day getting tuned by the same tuner with a heads and cam package similar to mine, but smaller stall speed that made 2-3 more rwhp than me.
Last edited by quickc5zo6; Mar 20, 2014 at 01:34 AM.
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
Are you saying that because it is a BBK or because it is larger than oem? I mean I dynoed at 450rwhp with a stock throttle body on a FAST 78 so Im a little confused why the throttle body would hold something back unless just because it is a BBK a company not known for quality.