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#1 | ||
Life's a Gas
Join Date: Apr 2005
Location: Sydney
Posts: 2,029
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Its finally time to change the exhaust. I'm about to get LPG installed, and I want the headers to go on beforehand. I'll also be getting the Crane 2031 that's been sitting on the shelf for the past year fitted.
I've decided on Pacemaker 4001s. That bit is settled. What isn't settled is what to put behind them. I want mid-range torque and I'd prefer a single pipe to dual pipes because of the cost difference. I've read on these forums that the standard cats don't flow too bad, so I don't see the need to go for hi-flow cats. Like I said, I'm after mid-range torque, not max high rpm power, so I figure the standard cats should be fine. Please correct me if I'm wrong. P***es me off that I've got to put cats on at all, seeing as the car is going to LPG. Apparently its the law. So the only real question seems to be the size of the pipe. I'm getting different advice regarding 2 1/2" or 3". What should I do? |
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#2 | ||
FF.Com.Au Hardcore
![]() Join Date: Dec 2004
Posts: 12,083
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2.5 inch is going to be the best bet in the end. Tried and tested.. and not "book me" loud.
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Older, wiser, poorer. Now in Euro-Trash. VW Coupe V6 4motion.
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#3 | |||
Life's a Gas
Join Date: Apr 2005
Location: Sydney
Posts: 2,029
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Quote:
Reckon something like this would do the job? Can't really ****** about the price. http://stores.ebay.com.au/Online-Per...dZ2QQpZ3QQtZkm |
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#4 | ||
Life's a Gas
Join Date: Apr 2005
Location: Sydney
Posts: 2,029
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Oh for crying out load - profanity checker is even picking up b-i-a-t-c-h.
Sigh. What a pain in the bottom. |
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#5 | |||
XB in parts...
Join Date: Dec 2004
Location: Sydney
Posts: 2,890
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Quote:
I'm not disputing your advice just curious.
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Daily Driver 2019 Ford Escape...looking for XR6T's. |
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#6 | |||
Miami Pilot
![]() Join Date: Jan 2005
Location: ACT
Posts: 21,701
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Quote:
The way to control volume is with mufflers, not pipe size. One in the middle, and a short resonator/hotdog at the back and the noise will be legal. I only have one muffler on mine, and it's probably/possibly legal. LOL. The 4001 are a better choice than the 4006 if you want to retain low end torque, but seriously, 2.5" is just too small for anything other than a stock E series V8.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#7 | |||
FF.Com.Au Hardcore
![]() Join Date: Dec 2004
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Quote:
As for v8's, no idea to be honest.
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#8 | |||
Miami Pilot
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Location: ACT
Posts: 21,701
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Quote:
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#9 | ||
FF.Com.Au Hardcore
![]() Join Date: Dec 2004
Posts: 12,083
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sorry guys, just realised abacus is driving a V8.
3" all the way for a V8.
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#10 | ||
Miami Pilot
![]() Join Date: Jan 2005
Location: ACT
Posts: 21,701
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Abacus' car is a 5.0 V8 - so 3" is the only way to go (or pick up someone's old XR8 twin system - pretty sure there's one on ebay for around $50.)
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#11 | |||
Miami Pilot
![]() Join Date: Jan 2005
Location: ACT
Posts: 21,701
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Quote:
__________________
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#12 | ||
Life's a Gas
Join Date: Apr 2005
Location: Sydney
Posts: 2,029
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LOL.
OK, so its 3" then!!! |
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#13 | ||
FF.Com.Au Hardcore
![]() Join Date: Dec 2004
Posts: 12,083
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3".. I agree with JC :P
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#14 | ||
Miami Pilot
![]() Join Date: Jan 2005
Location: ACT
Posts: 21,701
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No, I insist, I agree with Casper! 3".
Now having settled on 3", you WILL get good torque down low from single 2.5", but it will run out of breath about 4000rpm, and will struggle to the red-line. 3" is the compromise size that still gives good punch down low, but it keeps it going right to red-line.
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The Hammer: FG GTE | 376rwkw | 1/4 mile 11.793 @ 119.75mph 1.733 60' (4408lb) 1 of 60 FG MK1 335 GTEs (1 of 118 FG Mk 1 & 2 335 GTEs). Mods: Tune, HSD/ShockWorks, black GT335 19” staggered replicas with 245 & 275/35/19 Michelin Pilot sport 5s Daily: BF2 Fairmont Ghia I6 ZF, machine face GT335 19” staggered Replicas with 245s and 275s, Bilsteins & Kings FPV 335 build stats: <click here> Ford Performance Club ACT |
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#15 | |||
FF.Com.Au Hardcore
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Posts: 12,083
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Quote:
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Older, wiser, poorer. Now in Euro-Trash. VW Coupe V6 4motion.
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