[Land-speed] Missing Rpm...

drmayf drmayf at mayfco.com
Sun Oct 7 10:10:55 MDT 2007


Ok, I have scanned the data logs from Speed Week and World Finals. I n 
August I hurt the motor when boost went to 18+ and I maxed out the 
injectors and one went a bit lean. Rpm was around 5300 give or take a 
few rpm. At WF, I reduced boost to aroud 10 psi, had larger injectors 
and rpm still was around 5300 rpm give or take a few. Speeds were right 
at 180 mph in all three cases. I have hardware that should at least buzz 
to 6000, but when it get to that 5300 rpm point it just will not go any 
higher give or take a few rpm.  So, I am soliciting ideas of where to 
look. Remember, hurt motor rpm was same as refreshed motor rpm. It ran 
well this time but still bumped up against the rpm barrier... I have a 
new spark box as well, plugs all looked great. Used 100 octane racing 
fule in August, A8C this time. Much less spark lead at WF that SW but 
still the same rpm.

Any thoughts here?

Off list is ok, cause I know this bores the crap out just about 
everybody else...

mayf


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