[krisr]

Anyone here who has played with EFI on their motors, how have you designed your plenums? Or has a TBI body been used for majority conversions?

I'm going to build mine using a Tomahawk for port injection and adapt a 78mm throttle body from a modified LS1, just trying to design a bolt on plenum that bolts to the 4 barrel flange. As a rough guide what sort of volume works best for a natural aspirated engine? Would 1:1 of plenum volume/engine capacity be to much?

Specifically mine is a 400c/i.

Thanks
Kris

[Ollie]

I am using the new Edelbrock EFI Victor, with an Accufab Throttle body.
Check out Hammered post. He is getting 500 + hp with the Edelbrock
http://216.178.81.108/forums/showthr...d+Engine+Combo

Also do an EFI search on the forms there are alot more EFI threads .

[krisr]

Cheers, Hammered's setup looks good!

I'm more chasing a similar plenum as 455Turbo has in his Trans am. I am going to use an LS1 throttle body and fabricating up a cold air induction box, thus keeping everything entirely under bonnet but keeping the intake charge cool.

After doing some more reading and talking with some local EFI guys, an NA car should be fine with a plenum volume of about 1:1 with engine capacity which was my main concern in my design.

My megasquirt ECU is built, tested and working perfectly on the bench, next is the intake manifold, injector rails and plenum.

[Karch]

Krisr, any updates on your MS?

I just got a 36-1 trigger fit to my balancer, so I am slowly progressing.