3" downpipes?
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3" downpipes?
I've been wanting to upgrade the 2.5" to a full 3" w/ high flow cat to go along with kteller's group buy for the 3" exhausts...but when i asked the muffler shop to fabricate me a downpipe one for my teg, they looked at me like i was crazy, WTF? well whatever, so what I'm wondering is if anyone on here fabricates them, or can point me to a good guy who can?
TIA, much appreciated
TIA, much appreciated
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Re: 3" downpipes? (SpoolinLS)
just to let you know, i have a revhard cast manifold...are those very prone to spiking also with a larger dp?
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#10
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Re: 3" downpipes? (SpoolinLS)
You can also make it yourself. I ordered a 3" donut from http://www.raceengineering.com and cut and tacked it up myself. Here are some pics. It is just an idea though that building them isnt that hard. Sorry, the pics are a little hokie.
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Re: 3" downpipes? (DIRep427)
DONT upgrade to a 3" downpipe w/ a drag manifold, unless u like boost spiking.
why is there boost spiking on the drag 3 manifold w/a 3" downpipe.... sorry if newbie question. thanks
#12
Re: 3" downpipes? (speeddave)
DONT upgrade to a 3" downpipe w/ a drag manifold, unless u like boost spiking.
why is there boost spiking on the drag 3 manifold w/a 3" downpipe.... sorry if newbie question. thanks
why is there boost spiking on the drag 3 manifold w/a 3" downpipe.... sorry if newbie question. thanks
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Re: 3" downpipes? (speeddave)
DONT upgrade to a 3" downpipe w/ a drag manifold, unless u like boost spiking.
why is there boost spiking on the drag 3 manifold w/a 3" downpipe.... sorry if newbie question. thanks
Yeah I wondered the same thing, I have seen it happen, so if anyone can help let us know...
spiking has to do with the wastegate, not the manifold
why is there boost spiking on the drag 3 manifold w/a 3" downpipe.... sorry if newbie question. thanks
Yeah I wondered the same thing, I have seen it happen, so if anyone can help let us know...
spiking has to do with the wastegate, not the manifold
[Modified by DIRep427, 11:19 PM 1/14/2003]
#16
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Re: 3" downpipes? (DIRep427)
Actually, the rev hard and drag both dump off of number 1. The differece is that on the rev hard the four merge into one very early and it's somewhat open inside the manifold. On the drag, each runner is seperate almost all the way until it hits the turbo. This makes it almost impossible for the wastegate to dump anything except the gas in the number one cylinder. I've seen many boost creep problems with drag manifolds set up with tial wastegates and big dp and exhaust systems. As if that isn't enough, the rev hard manifold always seems to make more hp.
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Re: 3" downpipes? (tony1)
rev hard , no spiking, I used to spike 1-2 psi on regular basis with the drga manifold, again due to the placement of the WG flange and liek tony said, the way runners are routed before it hit the turbo inlet..
stan
stan
#18
Re: 3" downpipes? (SpoolinLS)
I had a drag 3 turbo kit and I had my dp flare to 3" as soon as it got to the bottom of my car by the oil pan and I had 3" thermal exhaust with no cat and I never had spiking...
I used a 40mm hks gate but it was just routed through the 35 mm wg hole in the drag manifold via a 90 degree pipe, so I dont think the size matters...
I used a 40mm hks gate but it was just routed through the 35 mm wg hole in the drag manifold via a 90 degree pipe, so I dont think the size matters...
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