Real tech discussion on design, fabrication, testing, development of custom or adapted parts for Pontiac Fieros. Not questions about the power a CAI will give.
There formerly was some RTV around the crack... that's what people were seeing as the crack in the other pictures. That RTV has been removed.
It was definitely a 1- or very few-off manifold, as you can see by the glue holding the injector bungs in place.
I have about 4 velocity stacks that ALSO have injector bungs... they wanted to make sure this engine had enough fuel.
The manifold has places for 4 coolant connections--front and back of each head.
There is no good place to feed idle air to all 6 and no good place to sense manifold pressure, so it would need a good bit of work in order to function. I can visualize making a small plenum about the size of a pack of cigarettes and attaching IAC and MAP sensor to that, then plumbing it via tubes to all 6 runners.
Oh yeah... almost forgot... This manifold is for ALUMINUM heads, not iron. That's what makes it so rare. I don't know if it's for Gen II or Gen III heads... maybe someone with more experience with those can tell?
Last edited by The Dark Side of Will on Thu Mar 10, 2005 5:34 pm, edited 1 time in total.
On the intake side only the roof and I think the floor are in different locations.
These can be matched on the heads or intake not sure which one to port to match.
I know some guys have used gen 3 intakes on gen 2 heads and such like that.
the ports dont' match up perfectly, but the moutning bolts and all that do. Nothing a little air grinder cant' fix though really.
Thanks for posting those pics Will.
the pistons I am using with my turbo build will give 12:! compression with aluminum heads. That intake on a high compression motor would scoot really good.
I have seen bungs like that on RFRE manifolds for the iron heads. I have a pic of it here somewhere. Hell maybe its even uploaded.
But they can be purchased.
I found the pics. You can see the injectors and rail here. This was a RFRE setup for iron heads. As far as I know RFRE still has a bunch of these intakes left and are still for sale.
Yeah, I've seen those pics before. That's a nice setup that almost seems made for the Fiero. To bad GM has a commitment to mediocrity.
I was told that my manifold is an RFRE prototype or limited production piece.
Are they just normal injectors with a groove for the plate? How is the plate attached to the injector?
you know I was reading and if you use a TEC 2 system, they dont' use a map sensor. TPS from what I understand.
I know thats now what you want to do but hey something else.
Also I wonder how one would then route the coolant. and thermo housings. there doesnt' appear to be a provision on there anywhere. Or maybe I just dont' see it?
Shaun41178(2) wrote:you know I was reading and if you use a TEC 2 system, they dont' use a map sensor. TPS from what I understand.
I know thats now what you want to do but hey something else.
Also I wonder how one would then route the coolant. and thermo housings. there doesnt' appear to be a provision on there anywhere. Or maybe I just dont' see it?
You can set up a MAP sensor... just need to make a vacuum manifold to get a reference from each cylinder.
TPS only engine management is called Alpha-N... it's not for street engines.
The two hoses coming off the one end of the intake are for coolant. There are two plugs on the other end so that you can take coolant from both ends of the heads and control cylinder head temps better.
Shaun41178(2) wrote:you know I was reading and if you use a TEC 2 system, they dont' use a map sensor. TPS from what I understand.
I know thats now what you want to do but hey something else.
Also I wonder how one would then route the coolant. and thermo housings. there doesnt' appear to be a provision on there anywhere. Or maybe I just dont' see it?
You can set up a MAP sensor... just need to make a vacuum manifold to get a reference from each cylinder.
TPS only engine management is called Alpha-N... it's not for street engines.
The two hoses coming off the one end of the intake are for coolant. There are two plugs on the other end so that you can take coolant from both ends of the heads and control cylinder head temps better.
Shaun41178(2) wrote:Its for gen 2, but can be mated to gen 3 heads.
On the intake side only the roof and I think the floor are in different locations.
These can be matched on the heads or intake not sure which one to port to match.
I know some guys have used gen 3 intakes on gen 2 heads and such like that.
the ports dont' match up perfectly, but the moutning bolts and all that do. Nothing a little air grinder cant' fix though really.
Thanks for posting those pics Will.
the pistons I am using with my turbo build will give 12:! compression with aluminum heads. That intake on a high compression motor would scoot really good.
Got any good writeups on mixing/matching Gen II/Gen III hardware?
Aren't there two versions of Gen III heads? What's the difference and which years/apps got which ones?
