Re: 515 BBC Build/Straub/Foxwell
Posted: Sun Jul 10, 2016 9:57 am
Is this built to take full advantage of a vacuum pump ??vortecpro wrote:The question is.......is it big enough?Bob Hollinshead wrote:that's a big hydraulic roller!
Guy
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Is this built to take full advantage of a vacuum pump ??vortecpro wrote:The question is.......is it big enough?Bob Hollinshead wrote:that's a big hydraulic roller!
I think you'd be the winner! It was dyno'd in Colorado Springs and will race at Woodburn in Oregon, so it will be rejetted for sure!Newold1 wrote:Based on those A/F's I think if they had been around 12.75 to 13.0 my guess-o-meter guess of 915HP might have been spot on. Nice work! Get those jets out so you don't burn that motha down!
My 1150 test dominator was tuned for max power. The owners carb a 1050 dominator was running in the 13.5 range and was down on power quite a bit, my air turbine was calibrated by SF, but I'm not sure its perfectly accurate, all that matters is I know where the engines run the best on my setup and I'm sure I got every thing there was to get. 740s HP to 890 right around 150 HP gain on the same dyno. Car should run 147 MPH @ 3600 pounds.dtrubey wrote:I think you'd be the winner! It was dyno'd in Colorado Springs and will race at Woodburn in Oregon, so it will be rejetted for sure!Newold1 wrote:Based on those A/F's I think if they had been around 12.75 to 13.0 my guess-o-meter guess of 915HP might have been spot on. Nice work! Get those jets out so you don't burn that motha down!
Foxwell and Straub work together a lot. Vortecpro (Mark) is known for expert machining, assembly and tuning.Newold1 wrote:Based on those A/F's I think if they had been around 12.75 to 13.0 my guess-o-meter guess of 915HP might have been spot on. Nice work! Get those jets out so you don't burn that motha down!
Mark, as my wife reminds me.... no matter what I say, it comes out wrong. I didn't mean that you left anything on the table. I meant that it will for sure make over 900hp at Woodburn and a 29.90 baro.vortecpro wrote:My 1150 test dominator was tuned for max power. The owners carb a 1050 dominator was running in the 13.5 range and was down on power quite a bit, my air turbine was calibrated by SF, but I'm not sure its perfectly accurate, all that matters is I know where the engines run the best on my setup and I'm sure I got every thing there was to get. 740s HP to 890 right around 150 HP gain on the same dyno. Car should run 147 MPH @ 3600 pounds.dtrubey wrote:I think you'd be the winner! It was dyno'd in Colorado Springs and will race at Woodburn in Oregon, so it will be rejetted for sure!Newold1 wrote:Based on those A/F's I think if they had been around 12.75 to 13.0 my guess-o-meter guess of 915HP might have been spot on. Nice work! Get those jets out so you don't burn that motha down!
Thanks Mike. I know Mark knows his stuff for sure and certainly wasn't trying to say he didn't do his job. Also, I don't know crap about the dyno sensors and just assumed it's an O2 sensor that we use in the collector only. I know those are bogus too. Thanks for the explanation.Wolfplace wrote:Dal
Disregard what the hat A/F reads on the dyno, any dyno. Do not get wrapped up in the fallacy of a perfect A/F number when it comes to power.
It is almost useless to anyone but the person that knows the dyno on a sweep test due to the way the information is gathered
You are reading air in pretty much real time but you are measuring fuel that is replacing the fuel in the bowl not what is being mixed with the air
Lambda is a different deal but even then I use the numbers to pick a direction not as a set in stone power number
Your last sentence says it all,,, you jet for power or MPH not a magical number