gtfodave

the more i research the more lost I feel. My setup is a Fast 102 for cathedral port heads. I am running LS1 style injectors, so logic says i need an ls2 rail? I found a L76, which everyone says is the same as the ls2 ls3 but now i see on all FASTS rails they dont list this?

gtfodave

Any got ant advice

cmac06

iTrader: (16)

I don't get the question. If it is whether the L76 is the same as LS2. LS2 injectors are shorter than LS1, so you would need to space the rails if you are using LS1 length injectors.

As for L76; it is the AFM version of the LS2 for the intent you are speaking about.

gtfodave

I'm trying to figure out if I can use a factory rail for an ls2 with the fast 102 manifold and if the L76 rail is the same rail as the ls2 so I can use ls1 injectors in the ls2 rail with the fast 102

cmac06

iTrader: (16)

Oh, I know the LS2 rails work, but I can't say about the L76 rails, as I've never had a set. According to this post onCorvetteForum the LS2/3/76 rails are the same.

gtfodave

Thank you sir. See that's exactly what I mean. I read they are the same part number but then I've read that fast has a different part number and puts the L76 as ls3 rails and the same

But according to gm it's all the same part number.

redbird555

iTrader: (14)

i would def go with what gm says....fast could just have made a mistake i've also heard theyre all the same. either way you will need spacers with the ls1 injectors

gtfodave

Yea see I was thinking part numbers don't lie. And yea I think I do need the spacers and new o rings