Looked like a good one Ike!! Are you going to Carlisle this year?
LS3 (418) in a C5??
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,776
Likes: 358
From: West "By God" Virginia
CI 7-8-9-10 Veteran
LS3 (418) in a C5??
Anyone replaced their LS1/6 with an LS3/L92?
What all would be involved in doing this? The gears have been turning on a forged Ls3 with some headwork and a nice cam. I have read where the L92 heads have as much if not more flow potential as the LS7 heads, and the ported intakes do pretty well too. i have seem some cam only LS3 cars in the C6 tech make some pretty nice power as well!!
Bottom line, I want more power, thought about tt's, but I would rather have a nice na motor with some spray on top just for ***** and giggles. Would 540ishwhp/490+wtq be possible with an na LS3 setup? Maybe someone from ECS will chime in since their package was one that I was looking at...
Let me know what's been done, what hasn't, or what's on your mind!!
What all would be involved in doing this? The gears have been turning on a forged Ls3 with some headwork and a nice cam. I have read where the L92 heads have as much if not more flow potential as the LS7 heads, and the ported intakes do pretty well too. i have seem some cam only LS3 cars in the C6 tech make some pretty nice power as well!!
Bottom line, I want more power, thought about tt's, but I would rather have a nice na motor with some spray on top just for ***** and giggles. Would 540ishwhp/490+wtq be possible with an na LS3 setup? Maybe someone from ECS will chime in since their package was one that I was looking at...
Let me know what's been done, what hasn't, or what's on your mind!!
Safety Car
Joined: May 2006
Posts: 3,799
Likes: 1
From: Northern Virginia
St. Jude Donor '08
There have been some posts on this topic.
Here is a link to one that was for sale.
http://forums.corvetteforum.com/show....php?t=1901710
You might want to pm BLOWNZ06 and talk to him on the subject.
LG motors was able to get 450rwtq/501rwhp from stock cube LS3 with a cam and bolt-ons. I would say with the extra cubes you should be able to make those numbers.
Here is a link to one that was for sale.
http://forums.corvetteforum.com/show....php?t=1901710
You might want to pm BLOWNZ06 and talk to him on the subject.
LG motors was able to get 450rwtq/501rwhp from stock cube LS3 with a cam and bolt-ons. I would say with the extra cubes you should be able to make those numbers.
Drifting
Joined: Mar 2002
Posts: 1,298
Likes: 12
From: Salt Lake City UT
I think this would be the hot setup.
With a streetable cam I would think 525 RWHP and 500 ft. lbs would be achievable and not have to shift above 7000.
Just need 24 reluctor crank ring and a couple of harness changes (approx $100).
With a streetable cam I would think 525 RWHP and 500 ft. lbs would be achievable and not have to shift above 7000.
Just need 24 reluctor crank ring and a couple of harness changes (approx $100).
Premium Supporting Vendor
Joined: Jan 2001
Posts: 17,681
Likes: 11
From: Central Jersey
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In V Veteran
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,776
Likes: 358
From: West "By God" Virginia
CI 7-8-9-10 Veteran
We have used the LS3 block on a few builds so far and its been great. For boosted applications we are sticking with 416 cuin and we can get right about 420 inches for an N/A engine. Getting you in the 540 rwhp range is certainly attainable. Feel free to give me a call if you have any questions at all.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
I built the first 403 using L92/LS3 heads in the country. It's still running great and makes 510/470 with stock like drivability. 380 RWT at 2200RPM and 400RWT from 3k on up. I've got a few more tricks coming up soon that will actually improve drivability more and add 30-35 RWT in the middle.
Last edited by WKMCD; Jun 26, 2008 at 06:51 AM.
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
You won't need a 4xx inch motor. You can make decent numbers with a stock displacement motor - 376ci.
LS3 Start Dec 07 http://forums.corvetteforum.com/show....php?t=1889360
LS3 Build Mar 08 http://forums.corvetteforum.com/show....php?t=1962727
LS3 Initial numbers 735rwtq Jun 08 http://forums.corvetteforum.com/show....php?t=2043116
LS3 Start Dec 07 http://forums.corvetteforum.com/show....php?t=1889360
LS3 Build Mar 08 http://forums.corvetteforum.com/show....php?t=1962727
LS3 Initial numbers 735rwtq Jun 08 http://forums.corvetteforum.com/show....php?t=2043116
Racer
Joined: May 2006
Posts: 431
Likes: 0
From: Houston TX
I built the first 403 using L92/LS3 heads in the country. It's still running great and makes 510/470 with stock like drivability. 380 RWT at 2200RPM and 400RWT from 3k on up. I've got a few more tricks coming up soon that will actually improve drivability more and add 30-35 RWT in the middle.
Melting Slicks
Joined: Apr 2007
Posts: 2,945
Likes: 1,115
From: Hereford AZ
I replaced my LS1 with a L92/L76 (intake)(has a bigger throttle body) last year. You will will need all the wiring harness adapaters (you can get them from Casper or someone else) for the MAF, MAP, cam position sensor, crank position sensor. Someone already mentioned the difference in the reluctor wheel. Of course you will need to have the ECM re-tuned. It should come with the later model oil pan so you can use that (not the early one, with the sides the buldge). You may also have to get a different oil temperature sensor and collant temp sensor. I think that is about it.
Last edited by vjjack04; Jun 27, 2008 at 12:21 AM.
