Restriction Plenum?
I was having a talk with a mate about our cars for a bit, and he asks if I've taken the 'restriction plenum' out of the air intake..
"ah, its somewhere in the air intake. because they had too much power when they put them in the commodores so they put that restrictor on it"
And supposedly there was an article about it in street machines ages ago.
No idea what this is or what he's really going on about? Anyone care to help?
Ta.
bellmouth. VS doesnt have one
1995 Manual HSV Clubsport
Wade Cam :: 9.2:1 CR :: Pacemaker headers :: Twin 2.5" Exhaust :: VT Brakes
1991 Supercharged VN Berlina
9 PSI SC14 Intercooled :: Genie headers :: Twin cats :: HM Twin 2.25 exhaust :: 3.45:1 LSD
It was a plastic bellmouth, fitted to plenum, it was fitted to series 2 VN's onwards. Basically the bellmouth (i wouldn't label it a restirctor) was designed to improve air distrubution to the rear cylinders. I removed mine and it made no difference, it just cost me an extra 20 bucks cause i snapped all the gaskets around the plenum and the throttle body cause they were so old..
When I removed mine in my old VP it ran worse,so I put it back in again
I was thinki about takin mine out but i dont know now anyone else got anything to say on the matter
There has been a fair amount of discussion try a search.Originally Posted by jimmig81
Don't worry about it mate, i mean if you want to modifiy your car, then go about it by replacing orginal parts with better performing ones, or modifying existing part to perfom better. Rather than just removing bit;s and peices of your engine all together
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