devilfish

If you would build your own upper plenum for the stealth ram so it would fit under a corvette hood. You keep the volym but build the plenum wider and took some of the hight.
Would that cause som error in the flow to the cylinders?

REgards

c4boom

the way that i see it the thing flows so much that there is no way that you could realy kill it as long as it still seals and the tb has a good shot

grumpyvette

IVE got a manufacturer already who has built a proto-type lower height plenum for the HOLLEY steath ram it should be available in a few weeks , Ill post as soon as I have prices and specs

kevinc

By all means, post the product when the info is out. The tall box doesn't clear my fiberglass hood by much, puts the TB height such that the duct angle is ~30deg, and has the 4 threaded vac fitting holes in a horrible location.

If your guy shortens the box, puts 2 threaded holes on each side near the rear instead of directly on the rear of the box, and maybe angles the TB like the Super Ram does, he's got a winner. I wouldn't mind giving up some plenum volume in the process.

86IROCNJ

Trying to find down falls to the HSR, you do not find many at all, except for the fitment! Almost everyone who has one has something to say about the size of the thing fitting properly, especially under stock conditions, like hoods. Wonder why it was designed like that. Anyway, sounds like a good deal if this new product is as described from above. On a side note, kevinc, love the sig! Its so true. lol

jmd

iTrader: (4)

They took an off the rack tunnel ram base, added injector bungs, and threw a plenum on top. Minimal effort, nice end result. I'd rather have emissions legality, but I'm sure a lot of their market will be older cars.

86IROCNJ

That's what it boils down to but they had to be thinking of who was going to be buying the damn things! Sure it fits with some modifications, but its just a pain IMO. I am sure they had to consider that aspect, but still produced it as it sits today. Just find it interesting, but hey, it doesn't prevent people from eating these things up before they are made.

xanax

one thing i dont like is the vacuum fitting for power brakes runs right into the plug wires.

Jim85IROC

iTrader: (2)

I'm not sure about the vette, but with the f-body, I think a plenum with the same volume, but simply offering a tilted mount for the throttle body would solve a lot of the fitment issues.

Jza

That's probably what I'm doing to my HSR. I'm going to cut a notch into the plenum all the way up to the top panel and bend the TB flange in so it angles down slightly, then tig it back up. A short and sweet mod for a functional and asthetic result.

BOTTLEDZ28

iTrader: (9)

What about getting a NOS plate and somehow gringing it down so that the angle is right for the TB.

89Formula350WS6

Grumpy, is it a major manufacturer or a local shop that you have working on this? I'm just wondering because I know there will be major demand for this plenum. I know that it is a holley part which brings legal/copyright issues, but if everyone can make upgrades/mods for holley's carbs, why not for their other parts?

Jim85IROC

iTrader: (2)

The throttle body doesn't bolt to the NOS plate. The plate has holes that the bolts pass through. Angling that won't accomplish anything because the bolts need to pass through it, which can't happen if it's angled.

JZA's idea could work out real well as long as he does it in a way that maintains enough length of threaded bolt hole for the throttle body bolts to properly tighten.

Kenn

About that angled spacer idea

How about using angled studs to mount the spacer and throttle body

Say having a 10deg spacer mounted on four threaded rods angled 10 deg extending from the plenum - then slide the tb on - a couple of nylocks - added plenum volume

Jim85IROC

iTrader: (2)

I'm not sure I follow what you're talking about, but...
it's going to be impossible to just build an adapter that bolts to the plenum, that will then accept bolts from the throttle body because all the bolts need to share the same real estate.

The plenum itself needs to have an angled face and bolt holes that maintain perpindicularity to the face. To bend it like Jza is saying, it's got to be done pretty far back on the plenum so that the bolt holes bend along with the mounting face.

BOTTLEDZ28

iTrader: (9)

ok how about this make 4 new holes in a plate and the HSR plenum that are drilled at a straight angle. postion the new holes inward of the old holes on the plenum now. drill a larger hole only half way into the holes on the adaptor plate so that 4 new bolts can be counter sunk. This will now mount an angled adapter plate to the plenum. now drill 4 holes in the TB's location on the plate and thread them to accept the bolts that hold the TB on the plenum. This will eliminte cutting the HSR up. anybody get what I am saying

Jim85IROC

iTrader: (2)

I can't picture what you're saying at all, but if you're moving the holes inboard you're going to have an awful hard time lining them up with the bolt holes in the throttle body.

Jza

I can see what he's talking about. The inboard holes would be to hold the adapter/angled plate on the plenum, then the studs in the normal places for the TB.

From my POV though, nothing wrong with the notching idea. I wouldn't even have to go near the bolt holes; it looks like there's enough room behind the bosses for like a 1/4" notch. It'll be tight, but that's fine since I just want a tiny tiny change in the angle.

I'm also going to have PCV and EGR.. stay tuned...

Matt87GTA

Is this modded upper plenum going to clear the OEM Pontiac hoods without requiring any modifications, grumpyvette?????? (crosses fingers)

grumpyvette

Is this modded upper plenum going to clear the OEM Pontiac hoods without requiring any modifications, grumpyvette??????

yes it should, , yes Ill get back to you as soon as possiable, Ive been working on this almost non-stop but the legal and marketing stuff plus the actual manufacturing setup takes time, believe me If I could just have them start shipping Ill be first to let you know!

Matt87GTA

Reeee-eeeh-eeeally .

Sounds like I will have an alternative to the Miniram afterall (not a fan of the SR in regards to working on/with it).

I hear ya on all of the legal stuff... A friend of mine and I are working on a 4 piston front brake kit for thirdgens and there are all sorts of issues to deal with to get it going.

My compliments on your efforts.

devilfish

Im working on a solution using carbon fiber plenum box with stock TB. Dont weight much and look cool

NOSFEDGTA

Hey Jason whats up?? Ill keep ya guessing here

87 Trans Am GTA
88 Trans AM WS6
94 Camaro Z-28