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| kaino |
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whats a good setup, i dont want it excessively loud and i dont want any drone. ive got some ph 4000 headers, what are some good high flow cats to use, the ones on ebay any good?
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| mitchg911 |
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im not sure about 2 1/2 vs 3inch, i had twin 2 1/2s on mine and it was pretty loud with a lil drone..
as for the cats ive got a pair of 2 1/2" hi flows which are about 5000km old.. theyre redback brand iirc... $275 posted if your interested, come with flanges on one end which will bolt up to pacies.. pm me if your interested. cheers mitch
_________________ BF XR6T 6spd Auto. 60lb injectors, Hybrid Cooler, Custom Piping, Custom Surge Tank, Actuator. |
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| Steady ED |
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You planning on doing much more too it?
If you are gonna go a bit further I'd probably future proof a bit with the 3", maybe 1 straight through muffler and a resonator to take the drone off it? I really like the twin 2.25"s I've heard (look at "XH5LWEPN"s build thread  ), but I don't think there is an off the shelf one, so thats probably an alternative to 3" if you don't mind spending a bit more?heres mine with single 2.5" redback, one muffler, redback high flow cats and genie extractors. {DESCRIPTION} Not too loud, not too quiet, and F**k all drone on the freeway.
_________________ ED XR8 Sprint - S-Trim, V500, 249rwkw |
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| green car |
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i have pacemakers and a 2.5 into 3 inch on my el with a 3 inch magnaflow and it sounds poo, im changing it soon to a 2.5 rear section with a lukey muffler like my other v8.
In my opinion i wouldnt go bigger than a 2.5 single on an internally stock windsor because they sound crap with the stock cam and compression.
_________________ 165 Killer Wasps all packaged in a green kmart car, almost an explorer in a way... |
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| heartagramfan |
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got a 2.5inch on my ef xr8 and i think its too quiet, mind you it has started headers and f**k cats, looking at a tiwn 2 1/4 or 3 inch next
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| kaino |
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ok i think im gonna go twin 2 1/4 inch all the way through. Dont know if i should use 2 mufflers or just use a single twin in/twin out muffler and weather or not to use a resinator.
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| taxi 5L |
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i've got pacemakers,into single 3'' with a straight thru flowmaster box,no hotdog or resonator..doesnt drone and sounds great but my car is a 5spd
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| XFWAGON |
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Check out NCIILanes exhaust, its a twin 2 1/4 system with 3 hotdogs in each pipe, sounds bloody mint, once I've payed my rims off, that's what I'm going with!
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| DaveXR8 |
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Ive got Hurricane headers, high flow cats and twin 2 1/4 pipes with 2 pairs of hotdogs.
It is a little load especially if im rocking up at home at 1 in the morning  Very nice sound though. Alot more deeper and V8 like compared to the hollow sounding Holdens!
_________________ AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw |
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| ebxr82nv |
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Twin pipes give a sharper note or single for volume
_________________ 9/98 AU1 XR6hp-about to retire from the road and be reborn on the race track. |
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| DougM |
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When i bought my AU111 XR8 last year it came with a 3" single system which sounded great but was droney at cruising speed(100-120km/h) which started to get annoying. I was advised that the droning is due to the exhaust being too large at the rear as the gas requires less pipe as it cools. From the diff back the system steps down to 2.5" pipe and 2.5" muffler.....Sounds even better, no drone and actually feels more responsive!!
Many people make the mistake of going too big and the performance will suffer for it...... |
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| 67RCE |
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{USERNAME} wrote: When i bought my AU111 XR8 last year it came with a 3" single system which sounded great but was droney at cruising speed(100-120km/h) which started to get annoying. I was advised that the droning is due to the exhaust being too large at the rear as the gas requires less pipe as it cools. From the diff back the system steps down to 2.5" pipe and 2.5" muffler.....Sounds even better, no drone and actually feels more responsive!! Many people make the mistake of going too big and the performance will suffer for it...... It may feel more responsive, but you will have lost top end, I have a single 3" on my AU1 XR8, and went 14.3 last night on an unopened 185 motor with 19lb injectors. BTW, IT 60 footed in 2.0 so a 3" will affect s**t all, just in twin 2.25 or single 3
_________________ ILL60 - EF XR8, Sunroof, Ticky Kit, 19x8.5/19x11 TE37's, 347, AFr185's, TFS BoxRcustom converter, Hurst Quarterstick, huge billet cam. |
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| DougM |
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{USERNAME} wrote: {USERNAME} wrote: When i bought my AU111 XR8 last year it came with a 3" single system which sounded great but was droney at cruising speed(100-120km/h) which started to get annoying. I was advised that the droning is due to the exhaust being too large at the rear as the gas requires less pipe as it cools. From the diff back the system steps down to 2.5" pipe and 2.5" muffler.....Sounds even better, no drone and actually feels more responsive!! Many people make the mistake of going too big and the performance will suffer for it...... It may feel more responsive, but you will have lost top end, I have a single 3" on my AU1 XR8, and went 14.3 last night on an unopened 185 motor with 19lb injectors. BTW, IT 60 footed in 2.0 so a 3" will affect s**t all, just in twin 2.25 or single 3 I was advised that top end loss would be minimal for a standard/mild engine. How often are you driving above 5000rpm on the street???!!!! The dyno showed it making good power up top. With the flashtunes done, I have a choice of three tunes and the one I use is the one with the best midrange. It sacrifices about 3-4kw at about 5300rpm to he highest rwkw tune.I prefer a car that is more responsive in the midrange...That's where I prefer the best power/torque spread for winding roads and overtaking. |
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