Quote:
Originally Posted by Big-Foot 
* Valve clearance hot is too tight. Not enough compression to get them to light off at normal cranking speeds..
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Back to starters for a minute..
It's my experience that the gear reduction starters don't really spin the engine over any faster than the standard direct drive starters - just that they draw less current.
If you put a booster-pack on your car when it's hot, and it starts, you may have a lack of amp hour capacity in the battery.. Even if the car is spinning over quickly - try putting a booster pack on as well and just see if it makes a difference..
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Thanks for thinking about it. I do think my electrical system is in good shape and isn't the culprit here and the fact the car pushes insanely easily made me think of starters.
Hmmm, never looked at or considered valve clearances with the hot start issue. I can do that.
I have jumped the car before with the spare battery we keep and it didn't help. Alternator charges great, battery is always ready to go on race weekends as I keep a tender on it before traveling.
We did discover something yesterday that has a minor change of being related. The car had some foam type air filters on it that were absolutely horrible for flow. Almost like a lawn mower air filter, the ones that don't flow for squat. Seriously - if you try to blow air through them with an air compressor you don't feel anything. I'll put up some pictures of these "bad" filters. I replaced them with the K&N round filters from the Jensen (Jensen already being used for parts, shame), made some modifications to the Z and the housings to get them to fit. Air really flows through these. Could be something to it, hard to say. I know I'm concerned about my EGTs and getting the mixture right for next weekend.