Re: What does dent in piston mean?

Posted by George 2 on April 09, 2001 at 16:12:33 from (216.46.140.186):

In Reply to: What does dent in piston mean? posted by Dave G on April 09, 2001 at 10:51:52:

They are most likely IH Firecrater or M&W Firepower pistons. I have a Farmall Super C that my parents bought new and we put IH Firecrater pistons in it in 1966. If you take the plugs out and shine a flashlight in, you can see the crater.These pistons are aluminum (not cast iron as the original set was) and also have a raised dome on the manifold side of the piston. This is to raise the compression up from 6:1 to 7.1:1. In the Super C the Firecrater piston used a .03125 inch thinner wall sleeve to give a 1/16 overbore to take the Super C from 3 1/8 to 3 3/16. M&W put in an even bigger piston (3 1/4 inch). The other part of the kit was a different distributor input shaft setup to give more spark advance. The net effect was to take the Super C from 24 PTO HP to an advertized 29 PTO HP at 1650 engine RPM. The other part of this conversion was to reset the exhaust valves from the .014 inch factory setting to .020 inch setting. This is to avoid burning the exhaust valves from not closing completely at the higher combustion temperatures. The only problem with these upgrades was that 2 years later we ended up changing the bearings on the transmission input shaft and the rubber bushings on the input shaft yoke. When ours was dyno'd back then it put out 30 PTO HP.

Follow Ups:

• Re: Re: What does dent in piston mean? Dave G 17:55:15 04/09/01 (0)

Post A Followup Name: E-Mail: Subject: Re: Re: What does dent in piston mean? Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]