Horsepower Expectations: LT-1 Build
Thread Starter
Drifting
Joined: Feb 2000
Posts: 1,917
Likes: 109
From: Crystal lake Il
2022 Corvette of the Year Winner -- Modified
2021 C4 of the Year - Modified Winner
Horsepower Expectations: LT-1 Build
Doing a 95 LT-1 build for a friend
-1.6RR
-Long tube OBX headers
-3"Magnaflow exhaust
-Fully Ported heads: 2.00 intake 1.56 exhaust
-Ported LT-1 intake
-54MM TB
Any thoughts? I was thinking maybe 360 crank???
-1.6RR
-Long tube OBX headers
-3"Magnaflow exhaust
-Fully Ported heads: 2.00 intake 1.56 exhaust
-Ported LT-1 intake
-54MM TB
Any thoughts? I was thinking maybe 360 crank???
Melting Slicks
Joined: Mar 2008
Posts: 3,022
Likes: 3
From: Chandler Arizona
If I go with an NA build, I'd have "Advanced Induction" port the stock heads and intake. Possibly even have then match a cam for your objectives. This is, if its in your budget. You'd be surprised of the results!
Melting Slicks
Joined: Mar 2008
Posts: 3,022
Likes: 3
From: Chandler Arizona
All that work and not even a "hot cam"?? Is a lot of labor, and you're going to be "in there". Affordable,popular grind cams are usually budget friendly. With that said, if he insists on a stock cam, I wouldn't expect "too" much improvement.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
I don't think you will hit your goal of 360 HP with your list. The exhaust on the LT1 is pretty good as it is.
The LT4 is about 330 with 1.6 RR, a more aggressive cam , .4 additional compression, but your proposed changes to the valves would match the LT4. I don't know if your worked over heads would match the 240 flow of the LT4....but lets say that your close. So your basically at the level of the LT4, less a few horses because of the cam......so lets just say 330. Then add perhaps 10-15 for the headers to get you to the 340-345 mark. I really don't see you getting to the 360 mark without changing your cam.
The LT4 is about 330 with 1.6 RR, a more aggressive cam , .4 additional compression, but your proposed changes to the valves would match the LT4. I don't know if your worked over heads would match the 240 flow of the LT4....but lets say that your close. So your basically at the level of the LT4, less a few horses because of the cam......so lets just say 330. Then add perhaps 10-15 for the headers to get you to the 340-345 mark. I really don't see you getting to the 360 mark without changing your cam.
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
I don't think you will hit your goal of 360 HP with your list. The exhaust on the LT1 is pretty good as it is.
The LT4 is about 330 with 1.6 RR, a more aggressive cam , .4 additional compression, but your proposed changes to the valves would match the LT4. I don't know if your worked over heads would match the 240 flow of the LT4....but lets say that your close. So your basically at the level of the LT4, less a few horses because of the cam......so lets just say 330. Then add perhaps 10-15 for the headers to get you to the 340-345 mark. I really don't see you getting to the 360 mark without changing your cam.
The LT4 is about 330 with 1.6 RR, a more aggressive cam , .4 additional compression, but your proposed changes to the valves would match the LT4. I don't know if your worked over heads would match the 240 flow of the LT4....but lets say that your close. So your basically at the level of the LT4, less a few horses because of the cam......so lets just say 330. Then add perhaps 10-15 for the headers to get you to the 340-345 mark. I really don't see you getting to the 360 mark without changing your cam.
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Race Director
Joined: Sep 2001
Posts: 14,676
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From: NEwhere Ohio
Thread Starter
Drifting
Joined: Feb 2000
Posts: 1,917
Likes: 109
From: Crystal lake Il
2022 Corvette of the Year Winner -- Modified
2021 C4 of the Year - Modified Winner
So 420 crank w/cam.....(360 wheel)
I agree I would rather swap in a cam, but he wants to wait.
My 92 laid down 391rwhp with just headers, exhaust, and ported intake; not even tuned
I agree I would rather swap in a cam, but he wants to wait.
My 92 laid down 391rwhp with just headers, exhaust, and ported intake; not even tuned
Melting Slicks
Joined: Mar 2008
Posts: 3,022
Likes: 3
From: Chandler Arizona
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Without knowing what his heads are doing theres no way to really say.
Tell him to pony up a few bucks to have them flowed will help for a cam upgrade down the road so hes not shooting in the dark.
Hope for the best but I dont see 360 happening.
Tell him to pony up a few bucks to have them flowed will help for a cam upgrade down the road so hes not shooting in the dark.
Hope for the best but I dont see 360 happening.
Thread Starter
Drifting
Joined: Feb 2000
Posts: 1,917
Likes: 109
From: Crystal lake Il
2022 Corvette of the Year Winner -- Modified
2021 C4 of the Year - Modified Winner
I thought the headers would give alittle more. The heads should outflow the LT-4. I opened up the port, maxed the pushrod pinch area, straightened out the wall, flattened out the port floor, took down the valve guide, and using Manley Race Valves.
Should be interesting, I am thinking he will let me do the cam this winter.
Should be interesting, I am thinking he will let me do the cam this winter.
