 anyone ever hollow out their downpipe? |
 May 10, 2012 - 8:47 PM
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 Enthusiast  Joined May 13, '06 From Kaimuki, HI Currently Offline Reputation: 10 (100%)  |
I'll be running a 3" high flow cat with 2.5 reducers on each side, I just noticed that the stock Gen III 3sgte downpipe has a cat built into it. I know some downpipes will kill drill bits and others you can pound out with a hammer if you spend a few hours..lol. I want to hollow it out though, are the downpipe internals hard to gut?
-------------------- -Jay
95 GT conv. project car: Manual, Gen III 3sgte, JN pisons, Eagle rods, overbore, crank knife-edged, crank scraper, ARP head/main/flywheel, Autronic EMS, Haltech Dual Wideband O2 controller, Audi 1.8T individual coils, FMIC and SSQV BOV, 3" downpipe, 3" ultra-high-flow cat, 2.5" Borla muffler, +other 01 S2000: FMIC, Haltech EMS, Haltech wideband, 570cc inj, forged pistons/rods, sleeved block, 5 angle valve job, ported and polished 02 R6, all stock, except for braided stainless brake lines, frame sliders, and adjustable brake/clutch leve |
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Replies
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May 13, 2012 - 7:09 AM
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 Moderator Joined Oct 1, '02 From fall river, ma Currently Offline Reputation: 13 (100%) |
match, do some research.
the cast elbow and large opening for the cat material are horrible for flow. all the velocity is lost in the cat section, which is what you want, velocity. a well made 3"downpipe will make more power, everywhere, over the stock downpipe, blitz upper section + stock lower, or any 2.5" dp. its been proven, over and over. there are dyno charts where the testing has been done, so before you get your panties all in a bunch, i suggest you know your facts. 
-------------------- Former Team 5SFTE pro member ;)
 13.6@108MPH, 5SFTE Powered |
Posts in this topic
match220 anyone ever hollow out their downpipe? May 10, 2012 - 8:47 PM
Jazon256 Yeah, I'd be really interested if anyone's... May 10, 2012 - 11:25 PM
match220 QUOTE (Jazon256 @ May 10, 2012 - 6:2... May 10, 2012 - 11:41 PM JozhGoober I've hollowed out the downpipe cat on my MR2... May 11, 2012 - 8:38 AM playr158 Why not buy an Ebay downpipe or something? they ar... May 11, 2012 - 9:18 AM match220 QUOTE (playr158 @ May 11, 2012 - 4:1... May 11, 2012 - 1:03 PM Kwanza26 QUOTE (match220 @ May 11, 2012 - 7:0... May 11, 2012 - 8:20 PM match220 QUOTE (Kwanza26 @ May 11, 2012 - 3:2... May 11, 2012 - 8:25 PM match220 QUOTE (Kwanza26 @ May 11, 2012 - 3:2... May 11, 2012 - 8:43 PM match220 It's not very hard, i took my cheap ryobi dril... May 11, 2012 - 10:39 PM presure2 that bottom half of the downpipe that contains the... May 12, 2012 - 7:55 AM delusionz QUOTE (presure2 @ May 13, 2012 - 12... May 12, 2012 - 9:32 AM match220 The factory outlet of the DP is 2.75 inches, this ... May 12, 2012 - 1:37 PM delusionz your car, your call, but i don't agree your sm... May 13, 2012 - 5:36 AM qatar11 PSA
Moto-IQ Article on Exhaust
/PSA May 13, 2012 - 8:14 AM match220 QUOTE (delusionz @ May 13, 2012 - 12... May 13, 2012 - 11:16 AM match220 delusionz and pressure2,
I just read your comments... May 13, 2012 - 7:03 PM delusionz 4 words...
mild steel & ceramic coating May 15, 2012 - 1:21 AM match220 QUOTE (delusionz @ May 14, 2012 - 8... May 15, 2012 - 4:40 AM |
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