Dump pipe R33GTST for 230- 240rwkw

[benl1981]

Hi all,

Ive got a 2860r/rs small Garrett turbo on my rb25 

it’s really responsive and have the z32, 550s and Powerfc to add on and turn. Hopefully to around 230rwkw 

Im looking for a responsive package, 

it has a split dump, does this look too restrictive to you? I think I have another dump somewhere, not sure if it will fit but it looked less restrictive to this. 

 

The car makes around 7psi by 3k rpm in 2nd gear and current runs-around 12.5 psi max boost. 

 

looking to run around 18psi boost, do you think this dump is ok?

 

thanks

ben

[Ben C34]

It's fine

[GTSBoy]

It's fine for that power, but those short split dumps are a big step down on long splits.

[hardsteppa]

dump that dump pipe. You need bellmouth in your life.

[Dose Pipe Sutututu]

It's ok, provided your wastegate flap doesn't get caught or hit the split. If it does you'll end up with boost control issues.

Hence why bell mouth is best, no bullshit.

[benl1981]

Hmm, interesting, might be cheap insurance to fit a bell mouth prior to the dyno tune. 
 

I can’t find an off the shelf bellmouth to front pipe (short section), maybe I’ll just get the $170 JJR complete front/dump

[GTSBoy]

53 minutes ago, benl1981 said:

maybe I’ll just get the $170 JJR complete front/dump

That's the way to do it.

One word of caution is not to assume that the flanges are straight and the fitment perfect on any of these cheap dumps. They often require a little f**king about with.

[benl1981]

May be ok? Checked the movement, what do you think?