LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

fuel rail question

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Old Jan 2, 2004 | 03:27 AM
  #1  
lt1camaroman93's Avatar
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fuel rail question

is there any way i can use my 93 fuel rail on a lt4 intake??
Old Jan 2, 2004 | 04:08 AM
  #2  
InjectedSS's Avatar
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Yes, they are both the same thing. Only difference is pretty much on the INSIDE of the intakes. Where the LT4 would have different runners and porting
Old Jan 2, 2004 | 09:30 AM
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the only thing i am worried about is 93 had the crossover in front, not in back. but i was wondering if it would still bolt up, if not with my fuel lines work with a 94-97 rail?
Old Jan 2, 2004 | 10:13 AM
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The 93 (batch fire) rails are completely different than the 94-and-up rails. I doubt they would fit on the LT4 intake, which is designed for the 94+. Not absolutely positive, but the 93's have return tubes on each rail that migh not fit down into the space available on the LT4 intake.

And, surprise, the porting and runners on the LT4 intake is almost identical to the LT1.... the actual raised runner differences were only put in the heads, not the intake - a cost saving move by GM. There is just more "meat" in the runners, so they can be opened up to match the LT4 head ports, and get some decent flow.
Old Jan 2, 2004 | 10:21 AM
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lt1camaroman93's Avatar
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the reason i ask is i am getting a set of lt4 heads with lt4 intake and am trying to figure out what to do about a fuel rail.. should i just buy one from a 94-97 and go from there?
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