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15th May 2014, 10:24 AM
#1
Advanced
3" exhaust
Hi all i have a 07crd & i want to put a 3" exhaust on it but i have been told they are too big for the 3l can anyone shed some light for me pls. thanks.
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15th May 2014 10:24 AM
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15th May 2014, 10:27 AM
#2
Patrol God
Hi mate the Beaudesert 2.75" seems to suit the ZD30 Cr diesel better than a full 3" system
Throws less errors
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
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15th May 2014, 10:33 AM
#3
Patrol God
Yup as TD said they are a tad too large. Makes the car over boost and also something to do with losing back pressure. My 2 & 3/4 gave the car plenty of more balls especially when the nads were installed afterwards .
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15th May 2014, 10:34 AM
#4
Patrol God
Sorry forgot to mention that's not to say others haven't done it. Many have the 3,inch with good results.
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15th May 2014, 10:37 AM
#5
BIG & BALD
Mine is a 2011 GU8 3lt CRD and I have a 3" Taipan XP exhaust and I haven't had a problem as yet and it been on for over two years. I have found the Taipan 3" exhaust isn't as droony as other 3" exhaust which is a good thing for me.
2011 GU8 ST 3.0 CRD, ARB Bullbar with IPF spotties, scrub bars and side steps, Snorkel, Dual Battery system, Waeco fridge, Turbo Timer, ARB Roof Rack with 5 IPF spotties across the front, Custom full Leather Bucket seats, DPchip, 3" Taipan exhaust, ARE Intercooler & scoop, Autron EGT/Boost and dual volt gauges, ARB front locker.
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15th May 2014, 10:37 AM
#6
Advanced
A little bit pricey for me i dont understand why you get errors i thought the quicker the gases got away the better.
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15th May 2014, 10:45 AM
#7
Advanced
Can get a 3" with cat & stainless muffler fitted for $800 can't quite afford a beaudesert $1300+ shipped to melb, then i have to fit it.
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15th May 2014, 11:13 AM
#8
Expert
this mob have a sale going on which bring the price to $995 http://genieperformance.com.au/produ...-2011-exhaust/ without the cat, cat is 195 extra.
and its a stainless steel exhaust.
2012 GU Patrol Simpson Edition. Auto. UHF, Bull Bar, 2" lift with Koni shocks, dobinson coils. 3" stainless Steel Exhaust.
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15th May 2014, 07:41 PM
#9
Expert
Originally Posted by
batesy
A little bit pricey for me i dont understand why you get errors i thought the quicker the gases got away the better.
I saw a link somewhere that gave a really good explanation of this. If I find it then I'll post it up.
To summarize, it's all to do with the diameter of the pipe and the speed which the gas can flow. Paradoxically the smaller the pipe, then the faster the gases flow, and at low revs this is important.
The Exhaust gases pulse out and with a fast flow (narrower pipe) then it can actually create a vacuum behind the pulse that actually helps to suck the gases out of the engine. (Scavenging I think it's called).
As the pipe gets larger then the pulse slows down and the vacuum decreases which can end up reducing the power.As the revs increase then the pulse rate also increases and the scavenging effect dies down as the flow increases. The larger pipe helps here.
Thus the diameter of the pipe is a compromise between low rev torque and high rev throughput (HP) Too Big and you lose the low end torque, too small and the engine will choke at high revs. This effect happens on both Petrol and Diesel engines, but I think that the lower revving characteristics of a diesel make the loss of torque a lot more noticeable.
Steve
2011 Patrol Safari 4.8 (Fitek)
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AB (15th May 2014), Alitis007 (15th May 2014), batesy (16th May 2014)
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15th May 2014, 08:44 PM
#10
Expert
I found the link - this guy explains it much better than me
http://www.dsmtuners.com/forums/freq...kpressure.html
Steve
2011 Patrol Safari 4.8 (Fitek)
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The Following 2 Users Say Thank You to Bulbous For This Useful Post:
Alitis007 (15th May 2014), batesy (16th May 2014)