LS3 vs LS2 vs L76 fuel rail difference?
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
LS3 vs LS2 vs L76 fuel rail difference?
Any differences between the LS2 and LS3 fuel rails?
Any pics of LS3/L76 fuel rails?
I'm installling LS3 heads on an LS2 forged motor, with an L76 intake. I haven't bought rails yet, don't like anodized aftermarket rails, and my LS1 stock rail is unpretty.
Any pics of LS3/L76 fuel rails?
I'm installling LS3 heads on an LS2 forged motor, with an L76 intake. I haven't bought rails yet, don't like anodized aftermarket rails, and my LS1 stock rail is unpretty.
Le Mans Master
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Melting Slicks
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Safety Car
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The LS2 and LS3/7 injector length is different. So we may be back to shimming the rail like with LS1 rail on L76. It looks like the L76/LS2/3 all share the same fuel rail so the difference in injector height is made up by the manifold rail mount lug height?
I have some LS3 intakes here but no LS2s (thankfully)
I have some LS3 intakes here but no LS2s (thankfully)
Last edited by see5; Sep 20, 2007 at 07:27 AM.
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Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Are you saying the injector length is different between the LS2 and LS3/7, or between the LS1/6 and the LS2/3/7?
I'm curious to see if there are any differences in rail or crossover tube size, or injector angle.
I'm curious to see if there are any differences in rail or crossover tube size, or injector angle.
Former Vendor
Joined: May 2003
Posts: 2,173
Likes: 2
From: Dallas Texas
LS2 injectors are rated 30# at 4 bar. You can swap LS7 injectors into the LS2, which are 40#. The LS2 and LS3/7 injectors swap, but they are a little shorter. Ill get pics today,I promise 
The good news is that the LS2, LS3, and L72 fuel rails are the same. With out taking exact measurements, they appear to be the same, with the same 4#'s on them
The good news is that the LS2, LS3, and L72 fuel rails are the same. With out taking exact measurements, they appear to be the same, with the same 4#'s on them
Former Vendor
Joined: May 2003
Posts: 2,173
Likes: 2
From: Dallas Texas
The LS1/6 has the older style injector, the LS2 uses something inbetween that of the LS2 and that of the LS3/7.
Thread Starter
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Awesome, that was the info I was looking for! I'll get an LS2 rail and have some AN bungs welded on the ends.
Cruising
Joined: Sep 2007
Posts: 11
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The LS2 injectors are 15mm taller than the LS3/LS7 injectors.
The top and bottom where the o-rings are at have the same specs for all of the above injectors. You would have to make or buy spacers to get the rail to bolt to the manifold.
The top and bottom where the o-rings are at have the same specs for all of the above injectors. You would have to make or buy spacers to get the rail to bolt to the manifold.
