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Does anyone have any info on idle vacuum in the hat? We are developing AFR fuel maps for mechanical fuel injection from idle on up. Bob Szabo...
One of the internet sources recently reported that those fuel mixtures can spontaneously ignite an hour or a week later. Years ago, I was...
An example is provided for an 8,000 RPM blower speed. A standard diameter 6-71 with seals is 430 ci / rev. x 8000 blower RPM = 3.44 million ci...
After event review: Team Boddie ran an outstanding drag racing event at Sacramento Raceway, this last weekend, Aug 25,26. Niel Morley was there...
FYI: procalc from airdensityonline: $89.99/year works on lap top or cell phone more than one person can be on the program at the same time free 15...
I purchased aluminum extrusion angle from the hardware store; adapted it to the seal surface on the block; to screw on below the seals and angle...
We found we could modulate the launch power with enrichment to avoid tire shake. We used the high speed, set to open just after the hit, to lean...
An after thought: we encountered a shut off valve that was scored on the inside. It leaked enough fuel that the engine would not shut off with...
Double check for excess crank case pressure or cooling system pressure that may have caused the problem. Bob Szabo bob@racecarbook.com...
Just to qualify: I was not saying to jet and engine for 6.45 to 1 AFR. I was saying how it works. Fuel enrichment is done to keep cylinder...
We added fuel to the launch. We could tune our launch very well with launch enrichment. We set the high speed to open just after the clutch...
browsing the site with an afterthought: We moved our back two nozzles from the hat into the blower rear and did not see any affect on jetting....
Here are two articles we wrote for IHRA about quarter mile to eighth mile relations with conversion math useful for gearing:...
Just an FYI: Methanol is not a monopropellant fuel. It burns at the stoichiometric air to fuel ratio of 6.45 to 1. Any amount of methanol beyond...
Thanks for your comments. After our experience with various percentages of nitro, I became a nitrowannabe as well. Anyone else get addicted to...
Thanks for the comment. With all of your experience, tuning with so many of the pros, your comments are valued.
If you want, send me your ProCalc user name and pass word, and I will look at your numbers. I do not have access otherwise, by design....
The size of the main bypass also depends on the air density. Those sizes may work at one AD and need bumping at other ADs. Bob Szabo...
We ran you combo through our smart phone calculator, ProCalc, with some assumptions; AD 95%, 12.8 gpm pump assuming near new condition, 3.8 AFR...
