diesel exhaust-the quest for more power

Submitted: Thursday, Jul 24, 2003 at 22:09
ThreadID: 6160 Views:1988 Replies:2 FollowUps:2
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I have heard that installing a "dump pipe" to the turbo gives better everything. That, plus a larger diameter exhaust system, should make my Nissan 2.7L turbo diesel perform better. Is this correct?? and is it worth the expense??
I'd rather hear from the experience of a larger group than just "one man's story". (Not that his story is neccessarily invalid of course)
Does anyone in Brisbane know where I can get the best deal??
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Reply By: awill4x4 - Thursday, Jul 24, 2003 at 23:49

Thursday, Jul 24, 2003 at 23:49
Oskar, the dump pipe you are referring to is actually the exhaust pipe as it exits from the turbo. Often the manufacturers dump pipes are of small diameter and quite restrictive. Most turbos seem to benefit from a pipe diameter of 2.5" (64mm) to 3.0" (76mm) diameter and often the diesel turbo's can be run without a muffler as the turbo itself is quite efficient in silencing the exhaust.
The larger dump pipe actually allows the turbo to spool up faster and thus boost comes on quicker and it gives a better throttle response.
It's probably the cheapest way you will improve your diesel performance, your next step then if you wanted more power is to go for efficient intercooling but this is expensive.
Regards Andrew.
AnswerID: 25863

Follow Up By: Member - Oskar(Bris) - Friday, Jul 25, 2003 at 07:29

Friday, Jul 25, 2003 at 07:29
Thanks Andrew
Now that tou mention it, a friend of mine fitted an intercooler that he got from the wreckers ($150) to his 2.5L diesel Paj. It came of a 2.8L something or other but he reckons it works a treat.
I think I'll have a look at both options.
A 4by can be a money pit can't it.
FollowupID: 17562

Reply By: Big John (QLD) - Friday, Jul 25, 2003 at 20:15

Friday, Jul 25, 2003 at 20:15
Have a talk to John Whittaker of Brisbane Tuning and turbo centre, he busted the power of my TD 100 series by 35% which did include a 3" exhaust. John's at 17 Nile St. Woolloongaba Ph 3393 1588

Regards john
AnswerID: 25928

Follow Up By: Member - Oskar(Bris) - Saturday, Jul 26, 2003 at 13:54

Saturday, Jul 26, 2003 at 13:54
Thanks John I'll give him a call
FollowupID: 17653

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