Has anyone ported their miniram to help balance the flow between cylinders? or should I just covert a single plane for EFI.

 

I've read that the LT1 sequential fire PCM had injector offsets to compensate.
If you're running batch fire EFI, the way to do it is to go single plane.

 

Have ported a number of them but no answer on what could have been balanced.Only reason to port is if the engine needs it. They do fairly well as cast. The cyls where there is typically a little turbulence in the plenum area shouldnt really be an issue. Wondering if a firing order swap on the cam would help, thinking its really splitting hairs for no sotp gain but who knows

What are you running?

 

383 stroker SBC, AFR Eliminator heads, and a 80mm turbo. Intake has been port -matched to heads but no runner work has been done to it.

 

Not sure its worth it.While it may help some the air is being forced through anyway with your turbo.

 

Cuisinartvette-What kind of flow numbers were you getting with the mini-rams you ported? Would it be hard to get one to flow 320-330 cfm?

 

it would take some work but could be done, sure. Seen one worked over to over 400cfm but takes a lot of porting and creative epoxy work. (and a bunch of $$)

Never flowed the ones I did. THe last one was a 1206 mini I believe wouldnt be surprised if it went just over 300cfm but I cannot say for sure as it didnt see a bench, wanted it to stay ahead of the 1054 AFRs (on a 408).

Dr Js performance in Orange County ca flows these a lot and could better answer your question.

 

I would leave it alone. I assume when it was port matched the runner was equally blended?

 

I've decided to run the intake as it is.

 

Dyno Don had a MiniRam that had really been opened up and we flowed it over at Joe Shermans. It flowed over 400cfm. Joe said he never had a SBC intake manifold flow more than that one. That is saying something.

 

No reason to switch to a single plane. Either run richer than your targeted air fuel ratio under boost to avoid detonation, or go with an XFI which has individual cylinder tuning. Expensive, yes, but worth it if your concerned about one or more cylinders running leaner than the others under boost....

 

I plan on running that Holley Dominator EFI ECU which does individual cylinder fuel and timing control as well.

 

most will never use what they can or will flow.

i see alot of guys with fantastic heads.. and itty bitty cams.and so so other parts.