Dyno'd the LT4 yesterday!
Thread Starter
Drifting
Joined: May 2005
Posts: 1,370
Likes: 1
From: Raleigh NC
Dyno'd the LT4 yesterday!
Took her over to Carolina Auto Masters for a dyno tune yesterday. Not the best air for good power...94 degrees and sauna-like humidity. She laid down 304 rwhp ( approx. 353 horsepower at the crank) and 305 rwtq with about as flat a torque curve as you can get. I wish it was more, but for a stock LT4 with only a catback and 77K miles, the numbers are right in line.
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG]
[/IMG]
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG]
[/IMG]
Last edited by jonecap; Jul 15, 2006 at 02:47 PM.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by jonecap
Took her over to Carolina Auto Masters for a dyno tune yesterday. Not the best air for good power...94 degrees and sauna-like humidity. She laid down 304 rwhp and 305 rwtq with about as flat a torque curve as you can get. I wish it was more, but for a stock LT4 with only a catback and 77K miles, the numbers are right in line.
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG][/IMG]
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG]
[/IMG]
Solid 12s should not be a problem. 
Thread Starter
Drifting
Joined: May 2005
Posts: 1,370
Likes: 1
From: Raleigh NC
Here's a comparison dyno sheet of my old full bolt-on L98 to the LT4. Both cars are printed on the same page. The '90 L98 is red and the LT4 is blue. The L98 definitely kicks butt in the torque department and makes power earlier, but falls short on horsepower.
Yes I know this post is going to stir up the L98 vs. LTx debate
[IMG]
[/IMG]
Yes I know this post is going to stir up the L98 vs. LTx debate
[IMG][/IMG]
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by jonecap
Took her over to Carolina Auto Masters for a dyno tune yesterday. Not the best air for good power...94 degrees and sauna-like humidity. She laid down 304 rwhp ( approx. 353 horsepower at the crank) and 305 rwtq with about as flat a torque curve as you can get. I wish it was more, but for a stock LT4 with only a catback and 77K miles, the numbers are right in line.
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG][/IMG]
Now the big question is will I get this car into the 12's with 4.10 gears and DR's this fall?
[IMG]
[/IMG]All depends how well you get off the line. Plain and simple. U might get into the 12's @108-109. Not sure.
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
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by jonecap
Here's a comparison dyno sheet of my old full bolt-on L98 to the LT4. Both cars are printed on the same page. The '90 L98 is red and the LT4 is blue. The L98 definitely kicks butt in the torque department and makes power earlier, but falls short on horsepower.
Yes I know this post is going to stir up the L98 vs. LTx debate
Yes I know this post is going to stir up the L98 vs. LTx debate
Secondly it is kind of neat to see LT4 dyno curves and modded L98 curves superimposed.......actually it shows how much stronger the LT4 is compared to even a modded L98....the L98 peaks out around 275 hp whereas the LT4 hits 275hp around 4750 and continues to climb to over 300hp.......the LT4 will operate between about 4200 and 6300 so you can easily see how much more hp it has compared to the L98...
The only time the L98 is putting more power to ground is from 0 to about 20mph....
BTW they are both great cars, not flaming either one.....
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
yeah very cool. but the only thing is.......alot of ppl dont race there cars, so that low end tq is more enjoyable on the street then high rpm's. cheers! looks like the L-98 makes more usable power from 3500- 5000 with hp and tq, that is nice on the street on a daily basis. at 5000 rpm's you are splitting hairs, then the LT-4 kicks some L-98 butt. but if you dont want to wind out the smallblock then the LT-4 isnt for you. i find i am in the 2500-4000 rpm bracket alot.
got job on that thread, i liked comparing the graphs, but 60rwtq is something u would most certainly feel. your L-98 was a good runner with those mods, and you didnt have alot either.
got job on that thread, i liked comparing the graphs, but 60rwtq is something u would most certainly feel. your L-98 was a good runner with those mods, and you didnt have alot either.
Last edited by 88BlackZ-51; Jul 15, 2006 at 07:00 PM.
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by 88BlackZ-51
........... then the LT-4 kicks some L-98 butt. but if you dont want to wind out the smallblock then the LT-4 isnt for you. i find i am in the 2500-4000 rpm bracket alot.
BTW I loved my L98, but plain and simple the LT4 is faster!!!
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by LT4BUD
The LT4 just climbs easily to redline.......it wants to be wound out....GM built it to be wound out
BTW I loved my L98, but plain and simple the LT4 is faster!!!
BTW I loved my L98, but plain and simple the LT4 is faster!!!
stock vs stock, it sure is, and alot more money.
dump $5000 into both, and its a toss up.
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
The Grand Sport Registry has a page for LT4 dyno results. Why don't you pass yours on?
http://www.grandsportregistry.com/dyno.htm
http://www.grandsportregistry.com/dyno.htm
Thread Starter
Drifting
Joined: May 2005
Posts: 1,370
Likes: 1
From: Raleigh NC
Finally got video of the dyno pull uploaded! Here's the last dyno pull of the day. Jeff Creech, who did the tuning (highly recommend...he knows his stuff), is driving. It's pretty dang loud to here a catback LT motor singing at 6,500.
http://videos.streetfire.net/video/1...6c51669d7a.htm
http://videos.streetfire.net/video/1...6c51669d7a.htm
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Originally Posted by jonecap
Here's a comparison dyno sheet of my old full bolt-on L98 to the LT4. Both cars are printed on the same page. The '90 L98 is red and the LT4 is blue. The L98 definitely kicks butt in the torque department and makes power earlier, but falls short on horsepower.
Yes I know this post is going to stir up the L98 vs. LTx debate [IMG][/IMG]
Yes I know this post is going to stir up the L98 vs. LTx debate
[IMG][/IMG]What full bolt on's were you running on the L98? Curious mind want to know! And your right Damn the L98 kicks some serious boootay! on the LT4.
Thanks,Matt
Thread Starter
Drifting
Joined: May 2005
Posts: 1,370
Likes: 1
From: Raleigh NC
Originally Posted by madmatt9471
What full bolt on's were you running on the L98? Curious mind want to know! And your right Damn the L98 kicks some serious boootay! on the LT4.
Thanks,Matt
Thanks,Matt
TPIS intake
AS&M runners
self ported plenum
Dyno tuned chip
1.6 rr's
Hooker long tubes
flowmaster catback
no precats
underdrive pulleys
no frisbee
MAT relocate
AFPR
K&N & open air lid
Nitto drag radials
It went a best 1/8 mile et of 8.32 and best 1/4 mile et of 13.02 and this was in hot temperatures. It was trapping 107. I believe with a new clutch and good air that it would have been in the 12's. It was hell out of the hole
If I raced that L98 against the LT4, the L98 would have it through 1st and 2nd...the LT4 would run it down in 3rd and put it away in 4th. In other words, the L98 is an 1/8 mile car and the LT4 is more of a 1/4 mile car and further if you choose
Safety Car
Joined: Dec 2004
Posts: 4,088
Likes: 0
From: Poop land
Originally Posted by madmatt9471
Damn the L98 kicks some serious boootay! on the LT4.
Thanks,Matt
Thanks,Matt
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by kopbet89c4
My God, it kills the LT4 in the torque department. That how my SuperRam was. But after 5000 rpms, its just done for and the LTx cars start walking past it.
Did you have stock head/cam with the SR?