dimension between the ground strap & the piston at TDC

[Jim Allen]

A picture of the 1 to 10 drawing in the photo shows that the bottom of the ground strap is .016" away from the piston at TDC in my 27 cc engine. What are some typical numbers in hemi type heads? The second photo shows that the glow plug is .048" away from the piston at TDC in my 16 cc engines.

JA

 

[Jim Allen]

Here's an interesting read about a new iridium alloy for spark plug electrodes.

http://www.globaldenso.com/en/products/aftermarket/plug/topics/2005/pdf/SAE-Manuscript.pdf