divided exhaust housing flapper valve.. quick spool down low, big power up top?
12-09-2008, 02:23 PM
#51
1.0 BAR
Join Date: Nov 2004
Posts: 204
Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
HMT style done here
http://forums.hybridz.org/showthread...t=turbo&page=3
http://forums.hybridz.org/showthread...t=turbo&page=3
12-09-2008, 02:28 PM
#52
1.0 BAR
Join Date: Nov 2004
Posts: 204
Re: divided exhaust housing flapper valve.. quick spool down low, big power up t
from that thread:
As I recall, James put a step in the bushings to help limit the leakage, and the rest is just clearances. Leakage has never seemed to be much of a problem, really. I have it apart right now, and I'm not seeing any burn marks around the bushings or anything.
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Quote:
Originally Posted by veritech-z
how do you keep exhaust from sneaking out of the throttle shaft on the spoolie jobbie? i was planning my manifold around the idea that if you keep the exhaust pulses seperate all the way down to the turbine housing, they would promote a faster spool (as per "maximum boost"). so i was going to run 1-2-3 into one side of the housing, and 4-5-6 into the other, with a balance tube for the wastegate. that way the exhaust pulses would hit alternating sides of the wheel right after each other. my garrett t4 has a 1.15 A/R
Originally Posted by veritech-z
how do you keep exhaust from sneaking out of the throttle shaft on the spoolie jobbie? i was planning my manifold around the idea that if you keep the exhaust pulses seperate all the way down to the turbine housing, they would promote a faster spool (as per "maximum boost"). so i was going to run 1-2-3 into one side of the housing, and 4-5-6 into the other, with a balance tube for the wastegate. that way the exhaust pulses would hit alternating sides of the wheel right after each other. my garrett t4 has a 1.15 A/R
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12-10-2008, 02:27 AM
#59
1.0 BAR
Join Date: Mar 2008
Location: Renton, WA
Posts: 636
Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
Makes me want to run a nice big holset, make crazy torque/spool, and have huge top end. All on a stock LS.
10-14 psi with a big holset should be awesome and have good DD ability.
10-14 psi with a big holset should be awesome and have good DD ability.
12-10-2008, 04:27 AM
#60
0.5 BAR
Join Date: Nov 2008
Posts: 75
Re: divided exhaust housing flapper valve.. quick spool down low, big power up top?
I like the idea of the valve however i think that the technology being used today in turbos such as VGT holsets etc. will far surpass this. It seems like one more thing to go wrong. id rather rig an actuator stepper motor or whatever you have to a holset and call it a day. the he351 VGT is dirt cheap on ebay and you get more than just one / two scrolls on at a time its continuously variable.
