EFI plan of attack! This one is weird.

sardeanie

sardeanie

Club Member
Ok, it's winter, things are slow here on the board so I'm just going to throw this out for opinions.

I'm looking for guidance on an EFI set up for an engine. It's a totally custom build intended for drag racing and i want to spray it too. It will have to be dyno tuned so custom EFI knowledge is key. I would also be looking for recommendations from this tuner on all the top end parts needed to best fit the goals. I'm thinking FAST, but injectors, fuel pumps, all that stuff need to be matched perfectly. Now here's where it gets weird...... it's an inline 6 AMC motor!

Basically, I need an EFI guru with a broad understanding and tuning abilities. I'm putting this out to the community before I start making calls. I'm in Oakland county but will go where I need to. Plenty of good sponsors on this board but I'd listen to some input here before I pick up the phone.

Anyone been down this road? Thanks.
 
What do you really need to know?
Help with injectors and a fuel pump?
FAST will work, or any of the other EFI systems out there.
 
This sounds like a really cool project! I prefer the FAST XFI system, and they do have many 6 cylinder options, both with COP systems and not. Some of the faster GN guys run it and it seems like it should work just fine even with the inline engine. No experience with using it with something like that though, so I can't help much.

Would love to hear more about the car though.
 
Dean, Maybe you and I should talk. I can give you some good info and some places for reading and asking questions.

I would choose the XFI. As far as the rest I would need to know the specifics of the motor.
 
BIGCOWL-IMP said:
This has to be the stupidest thing i have read in 2 years....
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LMAO! I agree! And I've been working on it for longer than that!

Yes, The FAST XFI set-up looks great and they actually have a system for inline Jeep motors. I just don't know how robust it is. My engine should make about 450-500 hp at the crank. How much spray can I push?...... 150, 250, more? The motor is stout for what it is :) .

How much injector would I need? Will the 4-barrel throttle body be enough? What kind of fuel pump? Will the EZ-EFI actually work for me or will I need to write my own tables? Who can tune this turd!!!

I'll spill more details if needed. Just seeking comments. Thanks guys.
 
98 Camaro said:
Dean, Maybe you and I should talk. I can give you some good info and some places for reading and asking questions.

I would choose the XFI. As far as the rest I would need to know the specifics of the motor.
Click to expand...

Thanks, I'll go through my notes and tally up all the specs. This has been a long term project that's been under the radar but I WILL be running it this year.
 
My brother inlaw and i have screwed around with AMC years ago....My brother inlaw still has his Rebel The Machine with a stroked 390 AMC motor thats going 9`s on the hose........i have never heard of anyone playing around with AMC 6`s..............
The hot setup for a 258 would be to swap on the 4.0 head which flows much better. The factory exhaust manifolds on a 4.0 flow really well. They pretty much are factory built headers. Even crazier would be to make a 4.0 stroker motor using the 258's crank to make a 276 cubic inch motor. ...............still would be week and not worth putting money into...
 
BIGCOWL-IMP said:
My brother inlaw and i have screwed around with AMC years ago....My brother inlaw still has his Rebel The Machine with a stroked 390 AMC motor thats going 9`s on the hose........i have never heard of anyone playing around with AMC 6`s..............
The hot setup for a 258 would be to swap on the 4.0 head which flows much better. The factory exhaust manifolds on a 4.0 flow really well. They pretty much are factory built headers. Even crazier would be to make a 4.0 stroker motor using the 258's crank to make a 276 cubic inch motor. ...............still would be week and not worth putting money into...
Click to expand...

Let me tease you with some tidbits...... 258 stroked to 5.0 liter, hardened crank, real good rods, 13.5 to 1 pistons, solid roller cam, CNC ported aluminum 4.0 head (rare). Exhaust header is yet to be made. Yes it's weird.
 
GM still builds inline six engines like the 4.2. Wondering if that system could be used. Seems you'd just need a crank reluctor wheel installed somewhere on the crank (like on the balancer, behind it, or something), probably adapt the distributor to give the cam signal. Could work, would be pretty original.

XFI will work, Big Stuff, Holley, etc.
 
Thanks, I haven't checked with Hesco in a few years. Wrote them once, didn't hear back. The head I have a what's known as a Hesco alluminum head but its technically a BMI head that Hesco bought the rights to now produce a few years ago.

I've done more research on FAST EZ Efi and seen some impressive results. I'm looking for a nitrous compatability example now.

Thanks for the ideas guys.
 
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