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22nd November 2015, 03:47 PM
#1
Expert
3" Straight Pipe
Afternoon patrol heads
So I'm straight piping my truck to beef up the sound a bit. I've already been for a drive with the rear section (with muffler) unbolted from the front section. With the turbo its not obnoxiously loud ive found.
Being diesel, and turbo, back pressure isn't needed is my understanding. But for whatever reason will I need to give it a tune once the new section of straight pipe is in?
Silvertop TD42 with aftermarket turbo.
Cheers Dylan
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22nd November 2015 03:47 PM
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22nd November 2015, 03:54 PM
#2
Patrol God
I would imagine fitting a free flowing exhaust would change a few parameters
and would benefit from a dyno .
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
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The Following User Says Thank You to threedogs For This Useful Post:
tuckertrucker (22nd November 2015)
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22nd November 2015, 04:17 PM
#3
Expert
What would it change? I didnt think diesels needed the back pressure.
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22nd November 2015, 04:55 PM
#4
Patrol God
May need the fuel tweeked or the boost adjusted to suit
throws everything out on the mighty zd30 ha ha
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
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22nd November 2015, 05:02 PM
#5
Patrol God
Originally Posted by
tuckertrucker
What would it change? I didnt think diesels needed the back pressure.
Not much really. Just do it. Always fit the largest possible exhaust practical post turbo.
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22nd November 2015, 05:03 PM
#6
Expert
haha the poor old zd30. Right, well I'll have it tuned when it goes in for the wheel bearings. Wont be a dyno tune tho as the nearest dyno is 300km away.
1992 Nissan Safari Granroad LWB TD42 after market turbo RE4R03A (for now) 3" straight pipe
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2nd December 2015, 07:20 PM
#7
Originally Posted by
threedogs
May need the fuel tweeked or the boost adjusted to suit
throws everything out on the mighty zd30 ha ha
Um these r a COMPLETELY different animal. The ZD 30 is a lot more electronically controlled than any TD42. Presuming your silver top in s in a GQ & not a late model GU then unlike the ZD30 u dnt have O2 sensors & all that crap. That's why the TD42's are so good & last so long. They're simple & not electronically controlled other than a glow plug timer module & a cpl of other minor things. No, adding a 3" pipe will not require a tune. It will just mean that the exhaust will leave your car a tad sooner. The only time you'll need to tune it is if you were planning on upping the boost at the same time. You'll prob find it'll spool up a little quicker & be marginally more responsive. If you're doing this purely for sound then don't touch anything. Just put the 3" on & enjoy it. If it's more power u want then yeah, up the boost & get it retuned.
Last edited by Sharky1; 2nd December 2015 at 07:24 PM.
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