Original (not conversion) LT4 heads on LT1 block, any problems?
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Le Mans Master
Joined: Jul 2000
Posts: 7,639
Likes: 326
From: Greenville SC
Original (not conversion) LT4 heads on LT1 block, any problems?
The stud sizes are different for the rockers, right? Any problems with this or anything else?
(repeat: not the LT4 conversion heads for the LT1)
(repeat: not the LT4 conversion heads for the LT1)
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Re: Original (not conversion) LT4 heads on LT1 block, any problems? (95wht6spd)
You'll need an LT4 intake as well, I do not think the LT1 intake fits properly. Other than that it's an easy swap.
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Joined: Sep 1999
Posts: 87
Likes: 0
From: Frederick, MD, USA
Re: Original (93 ragtop)
I believe you will also need a new fuel rail (expensive to buy new). Easier and cheaper to go with ported LT1 heads or AFRs.
From http://home.tir.com/~steveher/lt4.html
The engine's higher rpm also exceeded the LT1's fuel injector's ability to keep up, so the LT4 got a new fuel rail with 3.5 gram per second (28lbs/hr) injectors, replacing the 3.0 gram (24lbs/hr) injectors of the LT1. Revised fuel-injection system featuring a new fuel rail designed to keep pace with the better breathing, higher revving engine.
From http://home.tir.com/~steveher/lt4.html
The engine's higher rpm also exceeded the LT1's fuel injector's ability to keep up, so the LT4 got a new fuel rail with 3.5 gram per second (28lbs/hr) injectors, replacing the 3.0 gram (24lbs/hr) injectors of the LT1. Revised fuel-injection system featuring a new fuel rail designed to keep pace with the better breathing, higher revving engine.
