a custom 383 stroker motor is being built for me to handle up to 900HP (20-25PSI boost) and i was wondering if there will be any problems with this much boost and the MiniRam intake? also i understand that the MiniRam is lower than the stock TPI so will there be any problems with the D1sc Procharger system, any clearance issues?

 

Folks have mentioned that the airflow isn't even between the front and rear cylinders at high boost levels, but you could probably trim out the air/fuel ratios with an Accel VIC...

 

Andris, are you sure that it was under high boost? That style intake (LT1 also) is notorious for the rear cylinders going lean, but if anything I would think that high boost levels would fix that, rather then make it worse.

 

i've heard the same thing and was told to use VIC if i desided to go miniram w/ lotsa boost.

 

i thought it was notorious for the rear cylinders going rich at WOT.

because the intake charge slams against the rear wall of the intake.

but then again i'm wrong a lot

 

Yea, but the "intake charge" doesn't have any fuel in it to settle out by slamming into the back of the intake, you just get more air going down the rear runners which leans them out.

Hang out with some LT1 guys and you'll start seeing a pattern. When they screw up and break **** it's usually 7, 8 and 5 that go (in about that order)… all that the back of the manifold.

 

thaaaats what it was....

either way, an aftermarket sequential DFI setup that can control each cylinder individualy(i.e. F.A.S.T. or accel) would fix the problem, but those are pricey.

but then again if your buying a miniram, i suppose price isn't your #1 concern.

 

the F.A.S.T. or accel DFI is like what the LS-1's use correct?


also i havnt completely decided on an intake yet but is there any other better than the miniram for my application? besides the stealth ram cause i want to keep my strut brace. i would like to get DFI so then all this nice fun stuff will be wired to my laptop so i can have total control over my car. how much are these DFI systems goin for?

 

Or you could just port the damned thing so that it flows correctly under the conditions that you expect. Again, pricy but who cares if you're spending the money on a miniram.

At some point I'll understand why someone would pay for a miniram… the only reason that I can think of is if you're stuck on the looks of the thing. For that money you could get something semi custom made that would work better, or run something cheaper and spend the rest of the money someplace else to make more power.

 

EDIT, i lied, a good dfi system is going to run you ALOT. a FAST system with sequential injectionand wideband O2 is about $2600

if your looking for an intake that is going to fit under your strut tower brace, TPI, LT1 and the miniram are about your only options.

From what i have heard, the First setup flows pretty well.

personally i wouldn't base my intake choice upon whether it fits under a strut tower brace.

another good option is to use a converted single intake, such as edelbrocks Victor EFI, or the accel pro ram, and then use a 4 barrel throttle body. Accufab sells a 1215cfm unit for $500.

all that together including the fuel rails its only about $900 which is much cheaper than the miniram, and would make more power, and you could run a TBI style strut tower brace. Edelbrock sells one, and i think spohn is making one.

just some thoughts.

 

Don't forget you can change the firing order to fix that problem also. I use a 4/7 swap cam to keep the 2 rear holes even.

 

yea i am pretty much stuck on the miniram looks. would porting it actually solve the problems i would have with a lot of boost? i would like to have every cylender running as good as possible and from the looks of it i am going with the miniram.

 

Porting won't help the problem. A bigger plenum will. I have been researching this for a while. Evidently (the short, over simplified version) you need a plenum with a large enough volume for the cylinders to pull from. Basicly you need at least your engines displacement. My plenum now measures 336 cid while my engine is a 355 cid. Not optimum but between my cam, DFI, and plenum my engine is running pretty balanced.