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2001 Gu exhaust 2.5 or 3.0"

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 27
Joined: Tue Sep 21, 2004 11:00 pm
Location: Sydney/ Gold Coast

2001 Gu exhaust 2.5 or 3.0"

Post by fatcatsam »

Im going to get my exhaust done from the turbo back..
Guy at the shop reccomends a 2.5 mandrel bend from the turbo back.

WHat is more desireable?
it's a 3l turbo diesel.

What diiferences are there between the 1/2 inch.

Thanks for your help
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Posts: 677
Joined: Mon Nov 18, 2002 10:00 am
Location: Melbourne

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Contact roly

Post by roly »

3" is always going to be better than a 2.5"

volumes of pipes are like this if i remember physics/maths correctly

a 2" will hold 4 times the volume of a 1" etc etc
08 340kw HSV Maloo 6.2L
John Roly
Melbourne Again
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Posts: 27
Joined: Tue Sep 21, 2004 11:00 pm
Location: Sydney/ Gold Coast

Post by fatcatsam »

i should have been more specific.

It's a Gu patrol turbo diesel. 2001 model.

I thought the theory with exhaust is to create some sort of even back pressure and not simply go for the larger diameter.
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