exhaust - 99 GU 2.8Lturbo/intercooled Nissan

Submitted: Tuesday, Sep 09, 2003 at 14:59
ThreadID: 7129 Views:1525 Replies:2 FollowUps:3
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Hi, I own a '99 2.8L diesel turbo/intercooled GU Nissan. Can anyone tell me specifically the benefits of fitting 2.5 inch straight through exhaust after the turbo. I'm told that mufflers are not necessary as turbo takes care of noise and back pressure? Does it increase power? Are there any ill effects? Would extractors/headers before the turbo be of any use?
I've searched the archives but can't find the answer could anyone who has done this help me out.
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Reply By: Truckster (Vic) - Tuesday, Sep 09, 2003 at 15:14

Tuesday, Sep 09, 2003 at 15:14
Im currently running my GQ TD42T without the muffler to see exactly that, if it makes a difference.

YES!! ITS DRONING AS HELL! Gives ya a headache after a while, did a trip to Sydney from Melb without it, and was nuts, the muffler goes back on!

Powerwise, no difference, but noisey around 1500-1800rpm.

Motsons in Qld are the place for 2.8 powerup kits.
AnswerID: 30579

Follow Up By: Kev - Tuesday, Sep 09, 2003 at 17:31

Tuesday, Sep 09, 2003 at 17:31
Thanks truckster I'll look up Motsons and give them a try if their in Brisbane. Kev
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Follow Up By: donc - Tuesday, Sep 09, 2003 at 21:26

Tuesday, Sep 09, 2003 at 21:26
Kev, Motsons are in Brissy, they have a Branch in Coopers Plains on Beaudesert Road. Thier prices on Koni shocks when i need a set were the best around, so I'd say they'd be quite competitive on prices for other parts as well.
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FollowupID: 21667

Reply By: Steve from Drive Systems Victoria - Tuesday, Sep 09, 2003 at 16:41

Tuesday, Sep 09, 2003 at 16:41
You can't run extractors/headers before a turbo, as it requires a substantial cast iron manifold to bolt to. The large diameter exhaust allows the engine to "breath" easier and allow the turbo to spin up quicker as it does not have to "push" the spent gases through. Use a "straight-through" or "turbo" type muffler, only one, and dump the small resonator off the tail pipe if fitted.
AnswerID: 30588

Follow Up By: Kev - Tuesday, Sep 09, 2003 at 17:28

Tuesday, Sep 09, 2003 at 17:28
Thank you very much for the info. I'll look into it. Kev
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