ok when a custom plenum is place on a vl it no longer has coolant running through it like a stock one. on mine the coolant lines taht normally run to the plenum from the heater lines has been blocked off at both ends. does everybody else do this or run a pipe between the two to help keep the coolant circualting (spelling)

I blocked mine up.

block them off, or u can bypass them. same **** really, depends if u want to use ur heater!

my heater is permanently on just wondering if it would aid in cooling thats all

I have pissed all extra hoses etc right off

Shouldn't matter, but hey, just connect the two and see? May help in circulation but there is really no extra heat dispersmant as such?

mine are reconnected with a piece of hose i doubt it would make any diff at all to the temp

hey does anyone know what all those vacuum hoses and any other stuff that is attached to the plenum does? Got a mate in adelaide designing a custom plenum for me and need to know what these are?

well u will need a connection to your brake booster, cold start valve, to your charcol canister your ac switch and crusie control also to your fuel pressure reg and one for your boost guage of course and if u run a map sensor one for that and one for boost control thats about it i think

Cheers, very usefull info