Rb20/rb25 Cold Start Valve Removal?

[Paulusc44]

Hey all,

in the process of finalising my RB25DE+T conversion, just want to know if the removal of the cold start valve is ok.

From what Ive read this valve can be removed, will idle perhaps a little rough when cold but other than that it seems to be ok, especially by those that have fitted front facing plenums.

If anyone knows for sure, or has done this please let me know, any info is appreciated!

Cheers!

Edited November 24, 2014 by Paulusc44

[GTSBoy]

Sure you can remove it. It just allows the extra air to flow when cold to keep the revs up. It's not "controlled" by anything except temperature really, so the ECU/etc won't miss it.

[JustinP]

Thread revival!

I'm not going to plumb my cold start valve to the coolant lines on my Neo engine. AAC valve will remain however.

1) Will the idle during a cold start be much of an issue? I live in a reasonably warm climate for most of the year.

2) Given the ACC valve is just a solenoid valve, would it be worth me wiring it up a separate controller that triggers it when the coolant temp is > x? The car has no a/c so I figure the AAC wont be used much by accessories in the car.

I will be running a Link G4 ECU.

Cheers

Justin

[JustinP]

Actually thinking about it, the cold start valve will always be open given no coolant will be going through it to close it when warm. Hopefully I can just turn down the IAC valve screw to compensate.

[GTSBoy]

If you want to "bypass" the cold start, you'd be better off plugging up the flow path through the cold start section. Find a safe way to block it.