whine n' a whistle
06-28-2010, 12:18 AM
#31
The boost of the blower is pulley dependent, but the total potential boost of the entire system is turbo dependent.
Only thing im skeptical about is the flow of that blower bypass valve....I remember looking on mine on my magnacharger and it wasnt that big, not sure if the rousch one is larger. When you say 9psi at 6k rpm, is that blower rpm or crank rpm, and if crank, what size pulley was used? Just off the top of my head I know the tvs1900 at 15k blower rpm moves right around 1000cfm.
Maybe im still missing something but wouldnt there be flow reversion if thats the case? The pressure after the blower is greater than before so air would go backwards through the bypass valve since the pressure of turbo + blower is more than blower alone... or is the blower not able to flow enough at higher rpm to make positive pressure?
06-28-2010, 11:24 AM
#34
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I am having an issue with oil coming out the turbo though. Apparently STS kits have a check valve on the oil feed line that I was unaware of and oil is seeping into the turbo when the truck is off. So I need to snag one of those. What's a custom project without a few kinks?
It's time to meet the other local round these parts.
06-28-2010, 06:12 PM
#39
clever setup you got there, i like it. looks like you have it pretty well figured out but i just have one question, would'nt it be better for the bypass to open a little later like around 6-7 turbo psi intstead of 3.5psi? i mean to take full advantage of the blower low end power (which is making around 7psi max correct?) and then have a smoother transition i would think into the turbo top end power? just thought id ask..?
06-28-2010, 06:15 PM
#40
I will get some videos up after I fix whatever is pulling so much timing. The boost is there, but the power isn't. Right now its a dog...the timing dropped all the way to 2° when I got on it a bit. So it's not without issues. That didn't stop it from breaking 'em loose at 30mph when the turbo spooled, though. lol
I might try to get a quick video of the gauges showing how the sequential boost works.
I knew that question would come up It is a good question though. With the way I figured on setting it up, the system does have to compound a little bit. The blower is at full boost until the turbo reaches that preset pressure, at which point the blower bypasses. But the pressure ratio of both combined until the blower goes into bypass works out to about 10.5psi compounded.
I might try to get a quick video of the gauges showing how the sequential boost works.
clever setup you got there, i like it. looks like you have it pretty well figured out but i just have one question, would'nt it be better for the bypass to open a little later like around 6-7 turbo psi intstead of 3.5psi? i mean to take full advantage of the blower low end power (which is making around 7psi max correct?) and then have a smoother transition i would think into the turbo top end power? just thought id ask..?
It is a good question though. With the way I figured on setting it up, the system does have to compound a little bit. The blower is at full boost until the turbo reaches that preset pressure, at which point the blower bypasses. But the pressure ratio of both combined until the blower goes into bypass works out to about 10.5psi compounded.
Last edited by anasasisxenophontis; 06-28-2010 at 06:36 PM.
