wat size exhaust...

rod · tinkerer Joined: 14 Apr 2003 Posts: 380

should be used for a izusu 2L with RB20 Turbo?

and how would i variery(&)test the psi which the turbo will put out? (where does the varierying gear bolt onto)?

Loz · backyard mechanic Joined: 05 Oct 2001 Posts: 943

3" would be good. Only mandrel bent though.

You need a pneumatic bleed valve which sits in between the plenum etc and the wastegate actuator. This will vary the boost input. When varying the boost you can gauge it by a boost gauge.

Loz

tx1975 · tinkerer Joined: 21 May 2002 Posts: 321

2.5 inch is heaps for a small turbo even if u run 15 psi.

rod · tinkerer Joined: 14 Apr 2003 Posts: 380

15 psi is pretty high...

im thinking more like 7psi

ive got a 2inch exhaust at the moment, and i think i should get a 2.5inch

Gene FJ20DET · Posted: Tue May 27, 2003 10:49 am Post subject: Re: wat size exhaust...

go the whole hog. 3.5" manderal and tig welded Smile

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tx1975 · tinkerer Joined: 21 May 2002 Posts: 321

know of at least 2 ppl running stock turbos at 15 psi with stock exhausts, mates mx6 makes 165hp at wheels just with that and no other mods.

Gene FJ20DET · Posted: Wed May 28, 2003 11:00 am Post subject: Re: wat size exhaust...

if they put a decent zorst on they would get another 20hp. why restrict it.
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tx1975 · tinkerer Joined: 21 May 2002 Posts: 321

theres enough power there , its all about $$$ and if u have any or not as to how much power u want

Loz · backyard mechanic Joined: 05 Oct 2001 Posts: 943

If your getting a new one though, then there isnt much difference in price between 2.5" and 3" so you may aswell go the 3.

rod · tinkerer Joined: 14 Apr 2003 Posts: 380

keep in mind that the dump pipe which is attached too the actual turbo is 2.5 inches in diametre.

isuzu_gem · rice boy Joined: 29 Apr 2003 Posts: 39

just go as big as you can afford and fit