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Throttle body and fuel rail question?

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Old 10-26-2013, 11:56 AM
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Default Throttle body and fuel rail question?

I have a new 2000 stock LS1 5.7 liter engine that I am putting together. I just bought a new LS6 intake manifold (12573572) and have a question on the throttle body. Which is the best route to go? I looked at the Edelbrock 80mm ones that come with the tps sensors. Is this the best route to go. It doesn't seem to to make sense to go any bigger since the measurement on the LS6 air intake hole is only 76.2mm wide. I am not planning on porting anything right now. Because this is new I don't have anything at the moment so the fact that the Edelbrock ones come with the sensors is appealing.

Second question. A new stock fuel rail came with the intake manifold, the one that has the single inlet for fuel versus the inlet and outlet for the return line. I have coil covers on now and the inlet hits the covers. Should I use this fuel rail and modify the inlet to fit with the covers or should I use billet fuel rails?

Any help will be greatly appreciated!
Old 10-26-2013, 01:04 PM
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I used the holley billet rails with the ls6 intake. I liked the look of the rails better than stock ones
Old 10-26-2013, 01:08 PM
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Originally Posted by JLara1
I have a new 2000 stock LS1 5.7 liter engine that I am putting together. I just bought a new LS6 intake manifold (12573572) and have a question on the throttle body. Which is the best route to go? I looked at the Edelbrock 80mm ones that come with the tps sensors. Is this the best route to go. It doesn't seem to to make sense to go any bigger since the measurement on the LS6 air intake hole is only 76.2mm wide. I am not planning on porting anything right now. Because this is new I don't have anything at the moment so the fact that the Edelbrock ones come with the sensors is appealing.

Second question. A new stock fuel rail came with the intake manifold, the one that has the single inlet for fuel versus the inlet and outlet for the return line. I have coil covers on now and the inlet hits the covers. Should I use this fuel rail and modify the inlet to fit with the covers or should I use billet fuel rails?

Any help will be greatly appreciated!
Stock TB is fine, self ported by you!!!

Fuel rails covers need to be trimmed for the rails, there are write ups on that if you search around..

Billet rails would solve that problem about having to cut your covers, but will cost $200

Search for pics of fuel rail covers with both setup and see what look you like the best..
Old 10-26-2013, 01:11 PM
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I got my holley billet rails for 125/ new from local speed shop.
Old 10-26-2013, 01:23 PM
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[QUOTE=Blksilveradoss03;17779019]I got my holley billet rails for 125/ new from local speed shop.[/QUOTE

I think I am going the billet fuel rail route. Which injectors did you use?
Old 10-26-2013, 02:54 PM
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Stock ls1 ev1 injectors will hook right into aftermarket rails..
Old 10-26-2013, 04:30 PM
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[QUOTE=JLara1;17779030]
Originally Posted by Blksilveradoss03
I got my holley billet rails for 125/ new from local speed shop.[/QUOTE

I think I am going the billet fuel rail route. Which injectors did you use?

I'm using the gt500 injectors, they are ev6 style and do require a spacer
Old 10-27-2013, 12:33 PM
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If I use the stock EV-1 injectors at 28lbs then I don't need to re-flash right? If I use anything else (different lbs or EV-6) do I need to re-flash the ecm? Thanks!



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