96 lt4
Thread Starter
Heel & Toe
Joined: Apr 2011
Posts: 20
Likes: 0
From: Albertville Minnesota
96 lt4
Hi all,
I am looking to get 400rwhp out of my 96 lt4. Could I do this with a different cam and heads or port my heads?
Here is a list of my current mods, TPIS headers, SLP claw, LT4 Hot Cam, Corsa, GoodYear Eagle F1 GS-D3, LT1 Edit Tune @ DRM, R&D X & Camber Brace, Holly 52mm TB, Lowered 4 Corners, Z51 shocks, Brembro drilled & slotted rotors, GS Calipers
Thanks,
Dustin
I am looking to get 400rwhp out of my 96 lt4. Could I do this with a different cam and heads or port my heads?
Here is a list of my current mods, TPIS headers, SLP claw, LT4 Hot Cam, Corsa, GoodYear Eagle F1 GS-D3, LT1 Edit Tune @ DRM, R&D X & Camber Brace, Holly 52mm TB, Lowered 4 Corners, Z51 shocks, Brembro drilled & slotted rotors, GS Calipers
Thanks,
Dustin
Safety Car
Joined: Sep 2010
Posts: 3,752
Likes: 190
From: Indiana PA
Fuel Injectors, A lot more cam, and better flowing heads. Sounds like you got the exhaust side done with long tubes. Intake sounds ok to.
Get a dyno done and see what you got now. Always helps to have a starting point.
See Lloyd Elliot Porting for more head and cam stuff.
FYI, The search function works well here too.
Get a dyno done and see what you got now. Always helps to have a starting point.
See Lloyd Elliot Porting for more head and cam stuff.
FYI, The search function works well here too.
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
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Le Mans Master
Joined: Aug 2004
Posts: 5,141
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From: Metairie Louisiana
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Need more than the hotcam to get there, its got its place but is a little on the smallish side of things. That head is going to be on the big side by the time you get it to really sing. You can make power with the stockers worked over just a matter of what you expect vs spend. Remember theres more to pay out than just a port job and spings it will add up.
Racer
Joined: Sep 2007
Posts: 493
Likes: 0
From: Eden Utah
400 RWHP is not an easy number to reach. You will need a cam with at least 230/240ish duration 500 plus lift, heads that will flow at least 280/90. If you get the right tune the car will be very streetable. A lot of things will happen when you try to reach that mark, like your fuel pump won't be adequate, most likely need to bump up your injectors to 30 lbs. your throttle body is adequate. The secret is getting the right combination to work with the 350ci, it can be done but if your going this far I would seriously consider a 383. There is no replacement for displacement. If you boost the 350, then no problem with reaching the hp numbers, but boost has it's own problems. Good luck and have fun, I can tell you 400 RWHP is a kick in the butt..
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
He may be able to eek that out with the cam if he has it and the right head. Why limit onesself to almost though shoot get both if you can.
Youll get used to the power real quick, prefer to overbuild a bit as most times what you think youll get isnt quite what you expected with H/C swaps
Youll get used to the power real quick, prefer to overbuild a bit as most times what you think youll get isnt quite what you expected with H/C swaps
Thread Starter
Heel & Toe
Joined: Apr 2011
Posts: 20
Likes: 0
From: Albertville Minnesota
[QUOTE=rickreeves1;1577502215]Unfortunately hp doesn't come in a can.
Fat fingers on a phone my bad, sure would be nice right!!
What would a port job cost on a set of heads, any recommendations on what heads to use. So i could do some research on.
Fat fingers on a phone my bad, sure would be nice right!!
What would a port job cost on a set of heads, any recommendations on what heads to use. So i could do some research on.
Last edited by Dustin scheiber; May 2, 2011 at 12:00 PM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
If you want an honest 400+rwhp dont even waste your time with the LT4s get a set of AFRs 195s or a comparable piece, a more manlier carm then your car will scream.
By the time you get your LT4 heads to flow a decent # they are going to be on the big side for a 350 and the exhausts still dont measure up to whats out there. Not bad certainly but still....
It will pizz people off here but its the truth.
Youll hear a lot of " my buddies F body" and "this tuner runs XX with"..and they just might, but!
know that a lot of those cars are very well set up, lightened, driven right professionally assembled/tuned and other times a little fibbing tossed in .
By the time you get your LT4 heads to flow a decent # they are going to be on the big side for a 350 and the exhausts still dont measure up to whats out there. Not bad certainly but still....
It will pizz people off here but its the truth.
Youll hear a lot of " my buddies F body" and "this tuner runs XX with"..and they just might, but!
know that a lot of those cars are very well set up, lightened, driven right professionally assembled/tuned and other times a little fibbing tossed in .
Drifting
Joined: Oct 2005
Posts: 1,915
Likes: 48
From: Angier nc
If you want an honest 400+rwhp dont even waste your time with the LT4s get a set of AFRs 195s or a comparable piece, a more manlier carm then your car will scream.
By the time you get your LT4 heads to flow a decent # they are going to be on the big side for a 350 and the exhausts still dont measure up to whats out there. Not bad certainly but still....
It will pizz people off here but its the truth.
Youll hear a lot of " my buddies F body" and "this tuner runs XX with"..and they just might, but!
know that a lot of those cars are very well set up, lightened, driven right professionally assembled/tuned and other times a little fibbing tossed in .
By the time you get your LT4 heads to flow a decent # they are going to be on the big side for a 350 and the exhausts still dont measure up to whats out there. Not bad certainly but still....
It will pizz people off here but its the truth.
Youll hear a lot of " my buddies F body" and "this tuner runs XX with"..and they just might, but!
know that a lot of those cars are very well set up, lightened, driven right professionally assembled/tuned and other times a little fibbing tossed in .
The heads and a 125 shot of nitrous would keep most wannabes away(or w/o the heads).
A good catback is a must(Corsa)at this level and long tubes would help with the heads and/or any power adder.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Im betting with the right tune he could get more; on avg your est is probably realistic in most cases
Last one I got to play with,ported LT4 heads, ported intake stock TB dougs shorties hotcam 392 rwhp that was squeezing every last bit out of the tune. Probably not the norm but maxed out imo. Better head litle more cam be should be well over 400, longtubes is a plus
Last one I got to play with,ported LT4 heads, ported intake stock TB dougs shorties hotcam 392 rwhp that was squeezing every last bit out of the tune. Probably not the norm but maxed out imo. Better head litle more cam be should be well over 400, longtubes is a plus
Last edited by cv67; May 2, 2011 at 12:10 PM.
Thread Starter
Heel & Toe
Joined: Apr 2011
Posts: 20
Likes: 0
From: Albertville Minnesota
A good catback is a must(Corsa)at this level and long tubes would help with the heads and/or any power adder.[/QUOTE]
I all ready have the lt headers and corsa and no cats.
I all ready have the lt headers and corsa and no cats.
Le Mans Master
Joined: Jul 2000
Posts: 5,012
Likes: 5
From: OKC OK
It's definitely doable! See the sign 
Good heads (ported or AFR), port matched intake, bigger TB, bigger injectors, electric wp, etc, etc. IMO, the real key to making the power is getting the correct valvetrain and a good dyno tune!!!
Good heads (ported or AFR), port matched intake, bigger TB, bigger injectors, electric wp, etc, etc. IMO, the real key to making the power is getting the correct valvetrain and a good dyno tune!!!
Drifting
Joined: Oct 2005
Posts: 1,915
Likes: 48
From: Angier nc
My estimate (375) might be a bit conservative.With the headers and corsa and the afr with a good tune you may get 390rwhp.I would be surprised if you got 400rwhp out of the hotcam but who knows,anything is possible.An electric water pump will free up a few ponies also.
It will likely depend on the tune and air temp that day.
It will likely depend on the tune and air temp that day.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
My estimate (375) might be a bit conservative.With the headers and corsa and the afr with a good tune you may get 390rwhp.I would be surprised if you got 400rwhp out of the hotcam but who knows,anything is possible.An electric water pump will free up a few ponies also.
It will likely depend on the tune and air temp that day.
It will likely depend on the tune and air temp that day.
For the sake of comparison, thru the factory cats, I was at 363. With headers, I think your estimate of 375 is right on
