Plenum gasket question..

[Vette73]

Figured I would throw this question up here before going to my mechanic Tommorow...

Getting plenum and housings ported to 36mm...Dropped an email to Jerrys gaskets stating this....Just got the order in....There's two very thin plenum gaskets in the set I ordered...

Do I need another set? I notice there's two thick gaskets and on either side there are very thin gaskets matching up to the ones I received in the order..

Does anyone follow? The gaskets that I took out on each side of the engine are pretty thick maybe 1/8 inch in thickness...On each side of that gasket are two very thin gaskets ......So do I need another set?

Never took a plenum off a car before just valve covers on a SBC.....

Thanks....

[efnfast]

So, you are saying you found gaskets stacked on top of each other? There should just be a single gasket between the plenum and the I.H. Like what Jerry sent.

[Vette73]

Originally Posted by efnfast

So, you are saying you found gaskets stacked on top of each other? There should just be a single gasket between the plenum and the I.H. Like what Jerry sent.

Yes.....

On either side of the thick gasket there are two very thin gaskets ( one on each side)...I already dropped Jerry an email so I'm guessing he will see it Tommorow..
When I get the parts back from Pete I guess I will have a better understanding of where everything goes...Now that they are not on the car I may be confusing it with something else...

So for the plenum the car only requires one set?

[efnfast]

Uh huh, to the best of my knowledge. Not only that, if it needed more than one, Jerry would have sent you more than one.

[Paul Workman]

Is it a thick gasket, or one of those insulating spacers that used to be so popular to keep the plenum cool? That's my guess.

[Vette73]

Originally Posted by Paul Workman

Is it a thick gasket, or one of those insulating spacers that used to be so popular to keep the plenum cool? That's my guess.

It is a thick gasket that came off the car....On each side is I think what you mentioned Paul,an insulating spacer....

Jerry sent me two gaskets that are the same as the Insulating ones attached to the thick gasket.......

I know the plenum has been taken off before I owned it....New injectors coil packs and wires.....

[Bob Eyres]

I have those phenolic plenum spacers on my engine. If they aren't causing clearance problems with your intake scraping your hood you can leave them on. But be sure to port match them to the new dimensions of your plenum and injector housings after they've been ported.

[Vette73]

Originally Posted by Bob Eyres

I have those phenolic plenum spacers on my engine. If they aren't causing clearance problems with your intake scraping your hood you can leave them on. But be sure to port match them to the new dimensions of your plenum and injector housings after they've been ported.

I did speak to Pete about this, he is doing my porting....
If I choose to use them again they will probably need to be opened up a bit but they are pretty thick...

Don't know which tool I can use to have it perfectly done...I hear they keep some of the heat away from the plenum but it's not necessary to use them..

[Bob Eyres]

Like with a number of bolt-on mods, such as these spacers, and the "forced air" bumper intake from the same manufacturer, it seems "logical" that they would improve performance. But documentation on the claims is rather thin.
There was one comparison test for a Corvette mag in the nineties that showed about a 1/10 of a second improvement in qtr. mile times. But I wouldn't trust that, too many variables.

[XfireZ51]

I am skeptical the spacers are worth the bother in a motor used for cruising.