... anywhere. :confused:

 

I have seen them for the Z31 - but not the Z32.

 

"...provides a barrier for heat from the lower intake manifold to enter the upper intake plenum. Heat transmitted into the aluminum upper intake from the lower intake heats the intake air and reduces the engine's power potential.

-Preliminary tests have shown between 20 and 80 degree F drops in intake plenum temperature, depending on conditions.

-The 3/8" thickness also increases the intake runner length by the same 3/8" (.375").

-Also removes the requirement for a gasket between the plenum and lower manifold.

"

Ive never heard of them but it sounds like a good idea providing the bonnet wont hit it lol, im sure someone could mock up a template for one and give it a try? get a group buy going on it?

It is sooo hot under our bonnets i doubt it will make any differance

I have a vented bonnet and engine bay to wing vents - I think it would work for me.

 

I guess it shoudl be easy enough to make theses out of 10mm hard black rubber sheet...

I have seen bakalite plenum spacers for the Z32 at some shop in australia.

Best is to ask around on the Aussie forum...they probably know more.

It is sooo hot under our bonnets i doubt it will make any differance

 

The difference in heat transference by [physical] conduction and basic convection is considerable. The upper plenum will only get [a little more than] half as hot when that physical connection is 'insulated' from the lower plenum/head/heat source. I have tested this (Ferrari/AM have ceramic/bakelite I believe) and it is a fact.

 

I am trying 12mm solid (Silicon) Black Rubber (HARD) on the plenum currently as it is a crap heat conductor.

 

I have gone a little mad with the throttle body spacers - making them out of 12mm clear acrylic and illuminating them with blue LED's - sorry Funky Si :rofl:

 

Will let you know if they last/work/activate haters..

 

AndyGP

:o

I used to have one of these fitted to my B16A1 in my civic i-VT. Not sure how much difference it made but the theory is certainly correct. It was made of machined polyurathane if I remember rightly, someone on the civic forum got them made.

 

I can see if I can find who it was and see if they would be interested in making some for the Z32 if enough peeps are interested?

Well it's ok for you to A:/Mention another forum and B:/Mention the word 'Sell' without getting struck off or lambasted right left and centre. Cos you are subscribed ;-))

 

If it's good for other members - that's all I care about really. Go for it - I am not here to make money.

lol, well I guess I may get away with it as its in our interest as Z32 owners ;) hehe.

 

Right well good news anyways. I got hold of the guy and he said he'd be happy to make some gaskets. For a normal 4 cylinder gasket (minimum of 5 off) it would be £12 each, or £10 each for 10 or more. He would need a bulk payment for the first order. I guess the price may go up slightly with it being a 6 cylinder?

 

First thing is he would need a gasket to copy though, anyone got any lieing around?

I should still have one (or two, or three) - let me check at the weekend dude!

 

What is the thickness of his gasket?

Need any info then IM me or email me at andy.gp@gmx.com

 

Cheers.

I believe the gasket will be around 6mm if its made of the same stuff as my B16 one.

6 mm will be too thick, it will throw out the central cam bearing on the lower plenum.

its between the lower and upper plenum - not the head and the upper plenum

;-)

its between the lower and upper plenum - not the head and the upper plenum

;-)

 

Ok cool I may be up for one as well, the only drama maybe bolting down the coil packs.

Hi,

 

After talking to (racing) guys who know way more than I do - I have decided to scrap the 10mm intake spacer - Because the intake runners on the upper manifold flow into the lower manifold at a very shallow angle - the spacer will create considerable intake airflow turbulance - and that's not good.

 

The most we can go [apparently] and still make a thermo gain between upper and lower plenum is 1/16" - also means I need to change from a rubber gasket to a phenolic laminate (possibly glass based) that will last 100K - not 6K ;-))

 

Lee can you speak to your man and get his views on this sir?

 

More work to do chaps.

Just sent him your findings to see what he can do/suggests...

i take it you have done a plenum water bypass????

Yes indeed

I am shaking my colostomy bag as I type ;-)

 

Oh on the car - yes of course lol

Any luck finding a spare gasket yet andy?