92Z

iTrader: (1)

I'm considering selling my Miniram and going multi-point injection with a NOS plate system. I've heard that the Miniram runs some cylinders lean, and with NOS it's worse. Ideally i'd like to get ahold of a Holley multi-poit setup, with throttle body and fuel rails. Just wondered what intake(s) people think would be best to do a multi-piont conversion. Any thoughts appreciated.

Z28ricer

iTrader: (2)

Why not just put a direct port system on the miniram ?

92Z

iTrader: (1)

I didn't think a direct port was worth the effort for the 100-150 shot i am planning on using. I thought, if i had the multi-port injection set-up, the plate system would be less complicated. I've got an old single plane Torker II intake that i thought about converting, but i didn't know if it was worth the effort in terms of flow. The Torker II seems to be old technology. My engine is a all forged 11 to 1 383 with AFR 195 heads/Rev kit, 242/242 Comp Cam, and Miniram I was wondering if a newer style single plane would flow better? Any idea on power output difference between the Miniram and 4barrel (1000cfm) multi-point injection style set-up? Thanks for the replies.

Z28ricer

iTrader: (2)

For all the trouble you would be going to converting the intake system etc, possible hood clearance issues, i'd say it seems to make more sense to still go with the direct port system, it also leaves you a lot of room for future heavier doses of juice, as well as no bank lean / rich issues and per cyl tuning.

biggtime

I am getting rid of my stealth ram and going with the victor efi. For the money it's not worth converting one. You can also buy a throttle body adapter from accel dfi to use your twin TB on the holley flange.
Get one of these and then put a fogger on! And if you get a ACCEL DFIV7 you can shoot just nitrous in and set up the fueling thru the injectors along with the timing

anesthes

iTrader: (12)

I used a holley dominator intake. I think it worked just peachy.

www.singleplane-efi.com

Seems everyone I talked to with a LT1, HSR, MINIRAM all complain about uneven air distribution with the blower. (except a few folks who deny it).

I don't have any experience with nitrous, but I'd imagine you'd want the most even cyl filling as possible, which still = singleplane.


-- Joe

ChevelleFan

iTrader: (4)

Uneven cylinder filling in a blower application? huh? That doesn't make much sense. It's under pressure.

biggtime

I'm not one of the ones saying that, mine was fine.

anesthes

iTrader: (12)

And??

-- Joe

ChevelleFan

iTrader: (4)

1) I'm curious as to how you come to the conclusion of uneven cylinder filling -- some plugs look richer/leaner than others?

2) If the intake manifold is under pressure, as it is in a blower app, how are you not getting the same amount of air to the cylinders? An 'pressure leak' (ie-- open intake valve) is going to let out the same amount of air, no matter where the 'leak' is.

anesthes

iTrader: (12)

1) In my own experience, and experience of others I've talked to. Traditionally, on a TPI setup the front cyls run leaner. When you add the blower, the back cyls tend to run leaner than the fronts.

2) The pressure theory is incorrect. You will always have different pressures at in the plenum and runners. If the TB is mounted in the center, and all runners are equal you get equal distribution.

I've had some lengthly conversations with Rich at cruzin performance, where he has matched sets of injectors based on the customers flow requirement of each runner. On boosted LT1 and similar apps, customers of his found each runner had a varried pressure.

You potentially can have the same risk on a singleplane setup, depending on how the shape of the divider wall is between runners.

-- Joe

406 S10 Man

iTrader: (1)

PM me if you want to sell the miniram.

I would be interested in this cylinder filling discussion if anyone can find more info. I am looking to convert to fuel injection this winter and turbo next winter. I just bought a bare Lt1 manifold on ebay for $60 shipped, but I really want a minram. But if they have uneven cylinder filling problems, I may just buy the victor E.

92Z

iTrader: (1)

Thanks for the repiles. I still can't decide what i want to do. I'd really like to go with a manifold already set-up specifically for multi-point (such as Accel, holley, Edelbrock) and add a plate system, but the price on the intake set-up is expensive. Anybody care to share their experience on using a TPI sytle plate, or single nozzle wet system on a Miniram? Are these kinds of spray systems still going to have lean cylinders? I would assume so. I've seen plenty of people with TPI's with plate sysyems and Minirams with single nozzle systems. I guess you could just tune to the leanest cylinder. When i did a plug change recently, i found that cylinder 1 and 2 were a little leaner than the rest (according to plug color). My engine is N/A. Just wondering what a plate or single nozzle would do. Thnaks again.