More HP
Melting Slicks
Joined: Aug 2011
Posts: 2,423
Likes: 200
From: Atlanta GA
If you want up to 70 more HP, add headers to the mix and iridium plugs. Again at the crank. This should get you right at 400 RWHP.
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Corvettes utilize a computer controlled engine mnagement system. A customized tune will maximize the computer controls to get the most horsepower from the engine. Again a search will provide you with a wealth of information from the basics on how it works and what a customized or performance tune will do.
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Headers, cold air intake, tuning and LS6 manifold if you doesn't already have one can move you from about 295-300rwhp up to around 330-340rwhp.
You're using a ridiculously optimistic dyno to get a LS1 anywhere close to 400rwhp with some bolt-ons.
You're using a ridiculously optimistic dyno to get a LS1 anywhere close to 400rwhp with some bolt-ons.
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Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
it took all those bolt ons plus new heads and a cam to get me at 440 rwhp. those last 40 were expensive i guess. with LS6 intake, headers, and a mail in tune i was right at 330.
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
CAI, Underdrive Pulley, Tune, 160 thermostat, Ported Trottle Body, HP wires, and custom tune, can get you about 30-35 more HP. That is at the crank.
If you want up to 70 more HP, add headers to the mix and iridium plugs. Again at the crank. This should get you right at 400 RWHP.
If you want up to 70 more HP, add headers to the mix and iridium plugs. Again at the crank. This should get you right at 400 RWHP.
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
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Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
CAI, Underdrive Pulley, Tune, 160 thermostat, Ported Trottle Body, HP wires, and custom tune, can get you about 30-35 more HP. That is at the crank.
If you want up to 70 more HP, add headers to the mix and iridium plugs. Again at the crank. This should get you right at 400 RWHP.
If you want up to 70 more HP, add headers to the mix and iridium plugs. Again at the crank. This should get you right at 400 RWHP.
If you replace damaged, worn or defective wires and plugs, you will gain back any LOST performance that was caused by the bad plugs and wires.
In fact,, ported 160 deg stats don't directly ADD power either. It just helps keep the engine cooler so timing isn't reduced when it very hot
Real increases can be seen by adding, LT headers, Cold Air Intakes, CAM and ported higher compression heads (on NA applications)
Once you start increasing POWER, you will find out that you have to improve other parts; Bigger injectors, better valve springs push rods and rockers, ect Oh,, then theres the TUNE.. It has to be done..
Then some find that their clutch goes south or their A4 cant handle the power or the rear end pops an output shaft.
Its a slippery slope and a sickness!!
and no cure.....
