383 LT1 with FIRST intake
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 22
Likes: 0
From: westallis wi
383 LT1 with FIRST intake
A couple years ago I was going to do a 383 with a FIRST intake for my 87 but it never happened. I just picked up a 92 coupe for $3600 and will be building a 383 with the FIRST intake for my daily driver. I am just looking for a fun reliable street car that makes lots of power under 5000. My dad and I just pulled the engine so it will go out for machine work this month. I hope to have the car on the road by the end of May. When all the bugs are worked out I will get it on a dyno to see what the numbers look like. Here is what the build looks like so far
Scat forged crank 3.75 stroke
Scat pro comp 6" I beam rods with 7/16 bolts
Mahle Forged flat top pistons with coated skirts 4032 alloy (11:1)
LPE 219 Cam
AFR 195 Eliminator heads street port
FIRST intake manifold
Scat forged crank 3.75 stroke
Scat pro comp 6" I beam rods with 7/16 bolts
Mahle Forged flat top pistons with coated skirts 4032 alloy (11:1)
LPE 219 Cam
AFR 195 Eliminator heads street port
FIRST intake manifold
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
A couple years ago I was going to do a 383 with a FIRST intake for my 87 but it never happened. I just picked up a 92 coupe for $3600 and will be building a 383 with the FIRST intake for my daily driver. I am just looking for a fun reliable street car that makes lots of power under 5000. My dad and I just pulled the engine so it will go out for machine work this month. I hope to have the car on the road by the end of May. When all the bugs are worked out I will get it on a dyno to see what the numbers look like. Here is what the build looks like so far
Scat forged crank 3.75 stroke
Scat pro comp 6" I beam rods with 7/16 bolts
Mahle Forged flat top pistons with coated skirts 4032 alloy (11:1)
LPE 219 Cam
AFR 195 Eliminator heads street port
FIRST intake manifold
Scat forged crank 3.75 stroke
Scat pro comp 6" I beam rods with 7/16 bolts
Mahle Forged flat top pistons with coated skirts 4032 alloy (11:1)
LPE 219 Cam
AFR 195 Eliminator heads street port
FIRST intake manifold
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 22
Likes: 0
From: westallis wi
I don't think FIRST makes a manifold specifically for a LT1 but the base can be drilled to work for for it. Its hard to see but if you go to https://www.firstfuelinjection.com the blue 73 chevelle under customers rides is a LT1. I called Ken at FIRST to see if the manifold was ever used on a LT1 and he pointed it out to me. He also offered to drill the holes in the base if I couldn't do it.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
did you look at the Cam and Heads listed? cam nothing to radical.
again TPI \ FIRST on a 383 is to much bottom end.
Last edited by THE 383 admiral; Feb 5, 2015 at 11:22 AM.
Drifting
Joined: Aug 2005
Posts: 1,443
Likes: 65
From: Wauconda IL
And there is no such thing as too much bottom end.
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Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
if a auto that 4l60 \ D36 is going to love it.
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 22
Likes: 0
From: westallis wi
It it a auto with a dana 36 and 2:59:1 gears. I figured I would get the build done and see what it drives like before selecting gears for the dana 44 conversion. I don't want to gear it real high because I plan to do a good amount of freeway driving. My gut feeling is that I will end up doing 3:07:1
Thread Starter
Heel & Toe
Joined: Dec 2011
Posts: 22
Likes: 0
From: westallis wi
I was thinking the cr might be a bit to high as well, but lots of L98 engines go 10:5:1 with the 219 and don't seem to have a problem. I was more worried about cranking pressure (about 211) than detonation. The lt1 with reverse flow cooling seem to handle compression well from what I have seen. I will also hold a tight quench that should help fight off detonation. The static compression will actually be a bit lower than I posted closer to 10:75:1 and I know that chamber sizes usually are a bit bigger than they are advertised to be. I will check them when they get delivered and post the actual size.