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Tractor Pulling Discussion Forum

Piston Slugging

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scottf

01-03-2006 06:27:01




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I've been told that some guys attach a plate of aluminum to the top of a piston on the old low compression engines to increase the compression ratio. Could it just be JB welded without removing the pistons? Has anybody done this? How do they attach the aluminum to the top of the piston?




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thejdman01

01-05-2006 10:55:47




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 Re: Piston Slugging.can be done ... in reply to scottf, 01-03-2006 06:27:01  
What these guys are trying to say is itll never work unless you use really tacky wheel bearing grease



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BAD IDEA

01-04-2006 11:05:46




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 Re: Piston Slugging in reply to scottf, 01-03-2006 06:27:01  
My best advice is DO IT RIGHT !! New Higher Compression PIstons!! More POWER don't come cheap and cheap way will always cost you more in the end!!!



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famous amos

01-03-2006 12:56:08




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 Re: Piston Slugging in reply to scottf, 01-03-2006 06:27:01  
yeah, glue them on, the heat of combustion won't hurt a thing!! film it, (with sound) and send me a copy. The aftermath of destruction amazes me!!



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toot

01-03-2006 12:39:24




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 Re: Piston Slugging in reply to scottf, 01-03-2006 06:27:01  
I'll forget you said JB weld them on because I'm nice. I have done this before. I both bolted and welded them on.



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jd b puller

01-03-2006 09:53:03




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 Re: Piston Slugging in reply to scottf, 01-03-2006 06:27:01  
Bolt them on, DON'T WELD them on. It makes a mess.



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G/MAN

01-03-2006 07:29:08




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 Re: Piston Slugging in reply to scottf, 01-03-2006 06:27:01  
They're usually screwed on. Using JB Weld would be a time bomb waiting to go off.



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Tyler Neff

01-03-2006 11:21:07




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 Re: Piston Slugging in reply to G/MAN, 01-03-2006 07:29:08  
No seriously, JB Weld will work or some really good duct tape. Maybe some really good SUPER GLUE. Please post a video of you starting this tractor when you finish glueing her up.



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JD hauler

01-03-2006 16:17:41




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 Re: Piston Slugging in reply to Tyler Neff, 01-03-2006 11:21:07  
you guys are too much, I think Jay Leno has some openings for you guys!!



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G/MAN

01-03-2006 15:27:20




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 Re: Piston Slugging in reply to Tyler Neff, 01-03-2006 11:21:07  
Actually it depends on the strength of the piston return springs. Good solid new springs will usually keep the slugs in good contact with the piston tops, while worn out old springs will allow the slugs to "float" at higher rpm. But you can always rest assured in the knowledge that either way, the valves and head will keep the slugs from getting completely out of control.



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Tyler Neff

01-04-2006 08:00:41




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 Re: Piston Slugging in reply to G/MAN, 01-03-2006 15:27:20  
Yes G/MAN is correct in his thinking . You definatly want to use the head as a stop for the slugs. This methode usually work out nicely.



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G/MAN

01-04-2006 10:29:32




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 Re: Piston Slugging in reply to Tyler Neff, 01-04-2006 08:00:41  
One thing that I forgot to mention is to put a good coating of Teflon on the head and valves, though. That way the slugs aren't near as likely to stick to the head and valves, and free horsepower is the result.



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oldRoy

01-04-2006 18:02:00




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 Re: Piston Slugging in reply to G/MAN, 01-04-2006 10:29:32  
G/man, you're the best!! I now know what your name stands for. You are the "Go to Man" for high end info. I think I have a solution for your slug floating issue and that is to use the piston return springs to hold the slug against the head. This way the slugs are held solid and still improve the compression ratio. This plan involves a little more work because you have to cut out for the valves and spark plug. I agree with with using new springs for added benefit of reliability and HP.

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