Piping

[G0DF4Th3R]

Hey guys,

Anyone know the size of the original intercooler piping on an RB25DET? Coz i want to get a cooler that has its inlet and outlet on the left side of the cooler so i do not need to get a lot of piping, as in use the original piping in the engine bay. is this possible and how big should the diameter be?

thanks in advance

bambam

[GTS-t VSPEC]

G0DF4Th3R,

I think the original piping is 2.5". It is possible to have a cooler made this way, but certainly it is not the prefferable design. I'd save my money a bit more and go for a GTR style cooler with 3" piping all the way, you'd be surprised what a difference it will make.

See'ya:burnout:

[Gradenko]

3" is bigger than:

- the outlet from the factory turbo

- factory L pipe to the throttle body

- the throttle body itself

Isn't it a bit of overkill if G0DF4Th3R isn't looking for 600-odd-hp? All that extra volume to fill isn't going to help response very much.

[rev210]

gradenko is correct.

you need 'just enough' flow, not 'more than enough' flow.

By doing the latter you will reduce the response and bottom end performance and ecconomy.

[MrMayhem]

3" is falic

have you seen Dean Doors maroon RX3 run 10.9 at teh plex 2 1/2" piping with over 500rwhp........ 3" is just more of a mass to compress

[GTS-t VSPEC]

Well seeing as I have done it and it only improved both my response and power then I would have to say hah to that. I agree that too big can be a bit of overkill, but replacing the factory pipes is a must, they are shit.

I always assume that people are after big power, like me, if your not then 2.5" will be more than enough, just piss off the stock pipes.

See'ya:burnout:

[MrMayhem]

500-550 rwhp is big power in my book

[GTS-t VSPEC]

Yeah, me too. I'm going for about 450rwhp, and I think that the 3" piping will be working well and truly by then.

See'ya:burnout:

[G0DF4Th3R]

thanks for the responses so far guys. basically, im after 300hp at the wheels maximum thats all i want to do

[GTS-t VSPEC]

2.5", will be more than enough then.

See'ya:burnout: