Valentines? ---- dat. I'll spend the weekend with the Shuttle.
02-15-2009, 08:43 PM
#34
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Re: Valentines? ---- dat. I'll spend the weekend with the Shuttle.
Originally Posted by turbob16hatch
i have never had a problem with creep on this manifold. but like steve said a wastegate coming off the front looks retarded.
Originally Posted by turbob16hatch
plus steve isn't trying to run a gt40r at 10 lbs..... 
02-15-2009, 09:03 PM
#36
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Join Date: Dec 2005
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Re: Valentines? ---- dat. I'll spend the weekend with the Shuttle.
Originally Posted by Joseph Davis
I could care less if it's coming off the front or the side. Having to turn 90 or more degrees severely hurts exhaust flow.
Cool, then why do non-ideal wastegate exits cause creep with commonplace turbos? Drag manifold, perfect example.
Cool, then why do non-ideal wastegate exits cause creep with commonplace turbos? Drag manifold, perfect example.
if i remembet correctly the drag pulls exhaust from just one cyl. correct?
02-15-2009, 10:12 PM
#37
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Re: Valentines? ---- dat. I'll spend the weekend with the Shuttle.
Originally Posted by turbob16hatch
because people try and run 10 lbs on a large turbo, and try and use a relitivly small "valve" to bypass a huge amount of exhaust.
Originally Posted by turbob16hatch
if i remembet correctly the drag pulls exhaust from just one cyl. correct?
02-15-2009, 11:56 PM
#38
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Re: Valentines? ---- dat. I'll spend the weekend with the Shuttle.
Originally Posted by Joseph Davis
What huge amount of exhaust? It's just 10 pounds. Just because the turbo is capable of insane amounts of power doesn't mean it makes much more than a run of the mill T3/T04E at that pressure. There's a little less pressure across the larger turbo's turbine, so if the exhaust can't naturally flow out the wastegate it goes across the turbine instead creating boost creep. If it can flow out the wastegate exit easily, there is no exhaust creep.
now with this setup he is running "high" boost pressures ALL the time so wastegate priority is not of importance. also when asked to make a certain style manifold that is "very" popular that will be used the way he is going to use it. why would i stop and suggest to him i make a custom one off manifold that has "boost" control as priority as to run very low boost? explain?
Originally Posted by Joseph Davis
No, it pulls from all four, but three of the cylinders are expected to make sudden sharp changes in flow direction when the wastegate opens. Shear/tumble happens, and the whole works goes to hell in a hand basket. The idea is to let the exhaust's momentum do all the work for you, and put the wastegate exit at a shallower divergence.
http://www.dragturbokits.com/index.html
to finish this off, JD post up your manifolds that you have designed. i would like to see your work on fixing "boost creep"......
if you havn't designed and built manifolds please stfu
i'm all about having a discusion about manifold designs, but you don't even have your facts straight on the drag manifold. then you start talking about a gt40 on a k series like that has anything to do with a 60-1 on a b18
02-16-2009, 12:06 AM
#40
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Join Date: Dec 2002
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Re: Valentines? ---- dat. I'll spend the weekend with the Shuttle.
Originally Posted by rudebwoy
thats what I am talking about its about someone else on here build a nice project. HMT does not mean ghetto.
