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10sec.et
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Joined: 29 Mar 2006
Posts: 3472
Location: Houston,Texas
346624.78 points


1969 Oldsmobile Cutlass

PostPosted: Sun Nov 08, 2009 9:41 pm    Post subject: Reply with quote

i figured out where i saw the pics i was thinking of. Tiremine posted some pics of his BRPV over on the turboforums. unfortunately, some of those pics are now missing from the thread.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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10sec.et
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Joined: 29 Mar 2006
Posts: 3472
Location: Houston,Texas
346624.78 points


1969 Oldsmobile Cutlass

PostPosted: Sun Nov 08, 2009 10:08 pm    Post subject: Reply with quote




i assume that setup worked well ?

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af2 wrote:
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Mon Nov 09, 2009 12:27 am    Post subject: Reply with quote

With the supercharger, really well. Still pretty good with turbo's, it just needs a little tweeking. Here is a datalog from Bowman (the same track in the turbo video. The back powervalve opens at 12 p.s.i. to prevent the mixture going a little lean. What amazed me is I never could see a definate point where it opened. It did make a difference, I just thought there would be a definate point you could see on the graph, but it just flattened it out instead of it climbing sligtly. The blue line is boost and it goes up to 15 lbs. at the shift and goes back down to 11 lbs. then climbs back up. Clay


I'll take care of Tiremine on Monday....... Shocked

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I have done so much with so little for so long, I can now do anything with nothing.
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3169

65093.54 points


1979 Chevrolet Camaro

PostPosted: Mon Nov 09, 2009 10:44 am    Post subject: Reply with quote

That's weird about the boost, shouldn't the boost be more stable around where the wastegate is set? Is it boost creeep? Are the wastegates opening fully?
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Mon Nov 09, 2009 10:12 pm    Post subject: Reply with quote

No, this is a datalog from the supercharger. I was just showing what my powervalve setup delivered with varying boost levels. It appears that a constant boost level will take something different. I think the turbo will be good because it ran mid 6.30's with the datalog above - 11 lbs climbing to 15 lbs at the shift. 6.45 with about 11 lbs constant to me shows promise. Clay
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