Lt4 Intake On Lt1 Heads?
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,485
Likes: 2
From: Champaign, IL
St. Jude Donor '05
Lt4 Intake On Lt1 Heads?
Has anyone put a GMPP LT4 intake on their LT1 heads? I'd like to do this but Summit says the ports are different? 
thanks in advance
Joe
thanks in advance
Joe
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,485
Likes: 2
From: Champaign, IL
St. Jude Donor '05
ok it's .01" higher
I just talked to Summit tech and they said .01 is around 1/8 inch
guys help me out here because I can't see this affecting anything?
Scorp I trust your opinion I just want to be sure ... has this been tried already? Has anyone put one of these intakes on?
thanks,
Joe
I just talked to Summit tech and they said .01 is around 1/8 inch
guys help me out here because I can't see this affecting anything?
Scorp I trust your opinion I just want to be sure ... has this been tried already? Has anyone put one of these intakes on?
thanks,
Joe
Last edited by ToyC4; Nov 1, 2004 at 01:04 PM.
Team Owner
Joined: Mar 2000
Posts: 83,383
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From: Boston, MA
It...Won't...Work
Picture the angle that the cylinder heads are at. You have a v-shape that the intake has to sit in. If each cylinder head 0.10" different then you actually have 0.20" difference when you combine the two of them. If the LT4 ports are higher then your LT1 heads will leave 0.20" of gap.
Picture the angle that the cylinder heads are at. You have a v-shape that the intake has to sit in. If each cylinder head 0.10" different then you actually have 0.20" difference when you combine the two of them. If the LT4 ports are higher then your LT1 heads will leave 0.20" of gap.
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,485
Likes: 2
From: Champaign, IL
St. Jude Donor '05
I'm following you but .01" is one one hundredth of an inch and my heads have been decked (surfaced) a couple times anyway so I'm sure the total off my heads is more than a couple hundredths. I would think the LT4 intake ports would line up better because of this?
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,485
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From: Champaign, IL
St. Jude Donor '05
I talked to someone who has done this (More Performance) but it requires fabrication (welding) on the intake and doesn't appear to be very cost effective. #$%&! I was really hoping I could pull this off. 
Hmm looks like it's time for some LT4 heads.
Hmm looks like it's time for some LT4 heads.
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
From what I understand... the intake will bolt up... but the ports do not match... thus it is a waste of time. There are companies ( I know Scoggin Dickey has it) that offer the full LT4 conversion that offers the LT4 heads, hotcam and intake in a package for about 2k. They guarantee 400hp once installed.
That is the route anyone with the LT1 needs to go. Otherwise you are wasting money for an intake that will essentially hurt performance.
That is the route anyone with the LT1 needs to go. Otherwise you are wasting money for an intake that will essentially hurt performance.
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by ToyC4
Has anyone put a GMPP LT4 intake on their LT1 heads? I'd like to do this but Summit says the ports are different?
thanks in advance
Joe
thanks in advance
Joe
Thread Starter
Drifting
Joined: Feb 2004
Posts: 1,485
Likes: 2
From: Champaign, IL
St. Jude Donor '05
I was going to send my intake to Bob last week but the guys doing my engine didn't want me sending my intake off to Florida because they're doing assembly on my engine and putting everything back together right now. I shouild have sent my intake off last week anyway I'd probably have it back already. 
Thanks for all the good info guys!
Thanks for all the good info guys!
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
The intake will bolt up and work but you will loose performance. As stated in an earlier post the ports do not line up corectly. I used to think it wouldn't fit at all as stated by others but one of the f-body guyst tryed it and it did bolt up. For less then the cost of an LT4 intake you could have yours ported and it would help performance rather then hurting it and if you get real bored get it powder coated.
