Firecrater pistons revisited

Posted by Joe/WI on June 02, 2000 at 13:37:04 from (205.188.196.58):

I read the earlier postings about the differences between firecrater and stepped head pistons and first of all wanted to point out that there IS a difference between the two.The firecraters have two mounds on the top of the piston surrounding the area just inside the spark plug hole.The mounds stick up 1/2-3/4 of an inch into the compression chamber.The stepped head are raised about 1/8- 1/4 inch ,but flat for about 2/3 of the top of the piston opposite the valve area.
Anyway,I have a question.
I just took out the stepped head pistons out of my block and am putting in firecraters.There is a significant difference in the amount that protrudes into the compression chamber with the firecraters.
I don't know the distance that the valves travel into the compression chamber,but worried that the valves might hit the mounds.The local H expert at the IH shop told me not to worry about them hitting.Someone else suggested that I put a lump of modeling clay on the piston,put the head on loosely with the push rods and give it a revolution or two and look at the clay to see if it hits.I have the kerosene head,which has
I believe,the deepest compression chamber of all the H heads,so I can't imagine them hitting.
I mean if they hit in this head,what else could they work in?
So now that I have all of the pistons assembled and in and the bolt locks bent over,does anyone think I have anything to worry about?
Should I try the clay test?
Thanks,Joe

Follow Ups:

• Re: Firecrater pistons revisited Brian Schmidt 17:54:32 06/03/00 (0)
• Re: Firecrater pistons revisited justin 20:05:38 06/02/00 (0)
• Re: Firecrater pistons revisited jakee 19:22:28 06/02/00 (0)
• Re: Firecrater pistons revisited Les Repair 18:51:29 06/02/00 (0)

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