Std Manifold

[tridentt150v]

Can you use a std inlet plenum/manifold on an RB25/30?

If so what is the defining limits for height and power?

Who is using one and are you happy with it?

I did try a search, but you've no idea how many times a inlet/plenum/manifold comes up in threads. Just about did my head in openning threads that had nothing to do with what I was looking for!!

[nick81xd]

depending on what car it is in, with a 30 block everything from (pretty much) head gasket up moves up 3cms or so. the standard inlet can work but will hit on factory bonnet.

[KiwiRS4T]

No hard and fast rules but the stocker is considered fine for up to about 300kw. More is possible but you start to get some worthwhile gains with a 6 boost type manifold from about 280kw on.

[KiwiRS4T]

No hard and fast rules but the stocker is considered fine for up to about 300kw. More is possible but you start to get some worthwhile gains with a 6 boost type manifold from about 280kw on.

Sorry - getting tired - was referring to exhaust manifold - my mistake!

[JonnoHR31]

If the cars RWD then you can usually re drill the engine mounts and lower the motor ~15-20mm to clear the bonnet.

[tridentt150v]

Thinking of my gts25t r33 - thing is I have a Blitz LM IC and am happy with it. But they have inlet and exit on the same [passenger] side. So I was thinking of retaining it and the same piping etc and using the std inlet. Plus, I have WMI [no E85 here] and was wanting to keep it and the std plenum is better for this as well [forward facing ones feed the cylinders differently for WMI, and probably not as good for it]. Thinking around the 350-400rwkw level, start out with a bit less to start with because I'd also keep my 3076 but get a 1.06 in place of the .82. So I'm thinking [cheap but neat] pretty much keep everything for now and just extend my exhaust/dump by 20-30mm if needed. And before anyone asks, already got a tough clutch and diff etc, Gearbox is std, but I'll do it if and when it needs it.

Its a streeter/tourer - so not looking for dyno queen numbers.

And the bonnet problem, I'll look at that as I get to it, a bit of cut and shunt maybe, but I'll see.

Thing is, I think I'll up for a rebiuld anyway and I already have an RB30 and a spare RB25 head. Just got to start buying a few other bits and peices. Might get pistons this week [might have to sell a bike? to help fiinance it, but I'll see].