I will probably be porting my plenum and runners so what gaskets are people using for ported stock runners and plenum?

-keis

 

Mr gasket 146 or tpis has large tube gaskets. If siamese make your own.
stock runners get felpro or mr gasket 145.if you don’t have larger than stock ltr I wouldn’t waste your time.

 

I used these:

GASKETS FOR BIG/CUSTOM RUNNERS

 

if you have stock runners don't waste your time, the walls are too thin.

 

Vinny is correct - There is little chance of enlarging the stock runners, but the transitions can be improved. About a quarter century ago I port-matched the runners to the plenum and base on mine. The plenum was off so that the injectors could be removed for cleaning. I used Fel-Pro stock design (fiber/metal core) gaskets and carefully trimmed them using a die and punch.

 

Has anyone here on TGO tried the steel ball method, for "porting" the runners? Is it as much of a "joke" as it seems it might be?

 

stock gaskets ported, last time i checked 146 were hard to get and expensive they are also thin paper and prone to tearing

 

yes they turn out well I have done 39mm inner diameter

accel cast runners are less than 37mm inner diameter and where documented to flow 240 cfm and believe when extrude honed where 275cfm

 

Thanks! I didn't know if that was a real, viable thing, but interesting to hear that it works.

 

source of flow, numbers have been posted all over the net
https://www.thirdgen.org/forums/tpi/...5-runners.html

 

I may have to send you another intake I think it can get very close to the last test you did

 

I'm game.