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 Author
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Topic: 4" Open Downpipe (Read 555 times)
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turbo'd88
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Posts: 434
Location: Wisconsin
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Is anyone running a 4" open down pipe?
I'm thinking about running that on my 306 with a t74gtsh .96 a/r,i'm just gonna run it to the bellhousing for raceing and if i want to take it on the street i'll have a 4" exhaust made.
I am looking to make my turbo spool a little faster and make a litte more H.P.
ALSO if anyone has a sound clip of a 4" dowpipe please post it up
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88Gt T-Top Project
1998 zx7r fully chromed and polished
2007 ford five hundred daily driver
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wgsr-1
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Posts: 392
Location: Houston
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I run a 4" downpipe to the rear axle, and turns out in front of the back tire. No muffler. Kinda loud, but not louder than my mustang with 3" flows and dumps.
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90 MAZDA RX7 W/355 sbc, s400, t56, CSU.
91 Coupe, 408, trick flow r's, tremec, T-trim
86 5spd coupe, Performer Rpm packaged and MPt-70 turbo'd
03 gsxr 750 86 FXR 113S&S harley...sprayed
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XJHEAD
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SN-95 Hardtop in testing
8.14 @ 174 E-85 325 50 15's
8.98@158 4050lbs 28X10.5-15 MT
1995 Cobra Vert./Hardtop
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roozterdvx
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Posts: 407
Location: SW Florida
0
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Is anyone running a 4" open down pipe?
I'm thinking about running that on my 306 with a t74gtsh .96 a/r,i'm just gonna run it to the bellhousing for raceing and if i want to take it on the street i'll have a 4" exhaust made.
I am looking to make my turbo spool a little faster and make a litte more H.P.
ALSO if anyone has a sound clip of a 4" dowpipe please post it up
I ran 4" open DP on my T76. Dumped with a turn-down just past the bellhousing. It was not much louder than when I had it running to behind the seat with a muffler and dump before the axle. The muffler was built by me and did next to nothing for sound but it got by on tracks that required it. Now that I'm upgrading my combo, I'm running 5" open DP |
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If life gives you a lemon...
...squeeze it in someone else's eye, and run like hell!
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BigTurboNotch
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Posts: 878
Location: Chicago
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i too would like to see some or hear some clips of larger open downpipes, my 5" down pipe splits into dual 3.5" pipes.
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factoryengine
Non Seller
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Posts: 13
Location:
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Mine is a 4" downpipe w/ a v- banded dump right pss the bellhousing. I also have a v banded 4" pipe to a 4" in and 2- 3" out magnaflow muffler to duals out the back of the car.
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dodge turbo
Painted bolt wonder
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Posts: 635
Location: Pasadirty/Westmonster, Maryland
The richie 500
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i run a 4" down pipe no muffler.. kicks out behind my passenger front tire...combo is 360" motor with s475...
Its loud in the high rpms, cruisin is alright....when it idles it sounds like a boat
my old combo i switched from a 3" w/muffler with the MPT70 to the 4" open and it spooled the turbo to max boost (7psi) 300rpm quicker
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droopy
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Posts: 265
Location: New Brunswick, Canada
Holset HX52
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id like to see some more videos of larger single down pipes......im planning on running a 4" on mine.
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'78 4 door malibu
'72 monte carlo
'81 firebird
'79 malibu 2 door
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