 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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May 11, 2012 - 9:18 AM
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 Enthusiast Joined May 22, '03 From NOVA Currently Offline Reputation: 16 (100%) |
Why not buy an Ebay downpipe or something? they are fairly cheap.
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May 11, 2012 - 1:03 PM
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Enthusiast Joined May 13, '06 From Kaimuki, HI Currently Offline Reputation: 10 (100%) |
QUOTE (playr158 @ May 11, 2012 - 4:18 AM)  Why not buy an Ebay downpipe or something? they are fairly cheap. my upper half of the dp is a blitz cast iron one, lower half is stock. And I would rather save the $60 and hollow it out. -------------------- -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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May 11, 2012 - 8:20 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
QUOTE (match220 @ May 11, 2012 - 7:03 PM) QUOTE (playr158 @ May 11, 2012 - 4:18 AM) Why not buy an Ebay downpipe or something? they are fairly cheap. my upper half of the dp is a blitz cast iron one, lower half is stock. And I would rather save the $60 and hollow it out. Apparently you don't know how much a stock cat costs... -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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May 11, 2012 - 8:43 PM
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Enthusiast Joined May 13, '06 From Kaimuki, HI Currently Offline Reputation: 10 (100%) |
QUOTE (Kwanza26 @ May 11, 2012 - 3:20 PM) QUOTE (match220 @ May 11, 2012 - 7:03 PM) QUOTE (playr158 @ May 11, 2012 - 4:18 AM) Why not buy an Ebay downpipe or something? they are fairly cheap. my upper half of the dp is a blitz cast iron one, lower half is stock. And I would rather save the $60 and hollow it out. Apparently you don't know how much a stock cat costs... unless I read your comment wrong and you are talking about how hollowing out the cat is a bad idea because of how much they cost. If that's the case...stock cat = restriction, old cat = more restriction...if I had 3" piping from the DP exit to the muffler tip and if the stock cat only flows the equivalent of a 2" pipe because it's stock and/or old then my exhaust will only flow as much as the smallest point in the system. Since I don't know how much flow the stock cat is capable of either as a new cat or an old cat I would rather just hollow it out and use only my aftermarket high flow cat, so I know what the flow of my exhaust is. And I would rather take the time and hollow it out than pay the $60 for a new ebay one. -------------------- -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 |
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 match220 QUOTE (Kwanza26 @ May 11, 2012 - 3:2... May 11, 2012 - 8:25 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 presure2 match, do some research.
the cast elbow and large ... May 13, 2012 - 7:09 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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