Plenum Spacer

[z34 on juice]

Does anyone know where i can find a spacer made for the 3.4 dohc to go between the upper and lower intake? Ive found one made by cheetah online but i am having trouble ordering it through them!!

[1988GTU]

You might want to check hood clearances first. My buddy ALMOST thought about making a set for his 96+ style intake, but it would not only be interfering with his STB, but the hood would be in the way also.

[z34 on juice]

I plan on using a 1 inch spacer and my hood clearance will be fine and my car does not have a stb so im good there too

[RedZMonte]

custom... Why are you wanting one? longer runners will make more TQ but you will most likely lose top end HP. I have seen people do this for direct port NO2 injection

S

[Dave96z34]

My question is how serious are you. This was made on my X bosses cnc a few years back. For you to get one you would have to pay prob 300-600 and it may be 2 months of a wait.

[IsaacHayes]

I doubt it's enough change to feel anything. Brad made 1" spacers for the 3400 once and it didn't do anything. Unless you are taping them for direct nitrous injection...

[1988GTU]

Depending the material, you could make a spacer in your garage for under 50.00. When you start using aluminum or stainless, then the costs get $$$$.

[z34 on juice]

The main reason i plan on using a spacer is for heat insulation by using a phenolic spacer and pick up a little torque while doing so

[Dave96z34]

You can have a phenolic spacer cnc'd by my bos.

[d.o.h.c]

Man, if you really want to do this, I have stuff waterjetted all the time. If you want I can get you a price, but probably no more than $100-150.

[z34 on juice]

Yea if you could get me a price that would be great!

[d.o.h.c]

Yeah, what I would do is have like 10 of them made. Is this for the 91-95 of 96-97. Let me know man. I can buy the material and have some made up. Is there any one else interested?

[phantomgreen]

Possibly what are the pros and cons.

[RedZMonte]

The main reason i plan on using a spacer is for heat insulation by using a phenolic spacer and pick up a little torque while doing so

so your trying to insolate the intake manifold from heat? just a thought..... the intake bendds over the top of the engine where all the heat is riseing too, i don't think a spacer will provide you with much if any heat insolation... Now getting the upper intake ceramic coated would make more sence for heat insolation... Maybe im off here but it doesn't make a ton of sence to me.. i don't think the upper intake has coolant flowing threw it like many others so your not blocking coolant passages (example 3800 S/C, ect...). Don't think your are going to see any benifits for how much work it will take to finish... Honestly doing some simple porting on the intakes/throttle body will be more beneficial.

S