bolt on piston dome

[Mike Bock]

i know not the way to do it but has anybody had success in doing such a thing just toying around with a idea to get more compression out of a 320 waukesha on the cheap side ,am about 6.5 to 1 right know would like to get near 10 to 1

 

[Anonymous-0]

Yes, it can be done. Believe it is called slugging. Someone did that to a 1936 JD D I purchased a few years ago. Good running tractor until one of the two bolts that attached the 1/2" thick aluminum disc on one piston backed out. Destroyed an original cast iron piston,rocker arm tower, and beat up the valves, as well as scored the cylinder wall. Sure wish they had not done that to a good tractor.
jhauck
Titus, Alabama

 

[Dblair]

would a piston like this help ?

 

[mark us]

It doesn't cost that much for some pistons compared to the damage that can happen.

 

[Mike Bock]

boy that is what i need are they far a 320 ? my motor is .020 over with real good bores looking far a 1100 head to put on it our different pistons are them piston reasonabley priced ? i know if you have to ask the price you cant afford it

 

[Brian F1]

I bought a tractor that had it done, Cost after a bolt came out....busted head, scored cylinder wall and piston.... saved the crank and rods and started over. I would not recommend it. JMHO.

 

[toot]

I know of a set still going to this day, 10 years. The key is doing it properly. bolted on properly with enough bolts, and they were spot welded so they could not back out. Its way more risky to run one of those over gaughty cranks that wont last a season or two. JMHO

 

[Dblair]

they are for a 77 and a 66 but it depends on how they would fit your head pocket . they are 3 3/4 in dia.

 

[Mike Bock]

i was thinking about a aluminum plate bolted on with 3-8 bolts counter sunk down into the plate and locked in with a long set screw from the side but with the heat of apiston expanding and contracting afraid to do it

 

[6pack]

I would not take the chance of damaging a good 1100 head, they are hard enough to find. Friend from church bought a massey 33, and while he was disking threw a rod out the pan and damaged block. The tractor was previously used for stock pulling, when tore engine down it had crude bolt on domes and 1 let loose and junked block, crank, rods, and head......Custom pistons can be made for around $800 and would be reliable for many years, could save the rations of crap ya take if it all fell out on the track!! LOL!!!

 

[Underdog Moline]

This pre-dates me by a few years but I know that there were M&W or fire craters (Dont remember what one it was) pistons had bolt on tops. depending on who you know the advances in Tig welding an experienced welders would also be able weld on your domes and reduce the chance that they would fall off and destroy the engine. I currently run a set of that I updated to a steel insert lock nut and havent had any issue

 

[Anonymous-0]

Weld them on .
The proper way is to make the domes.
Then drill at least a couple 1"holes thru the domes and then chamfer them with a 90 degree countersink down to with in 1/8" thru the domes .
Then with a tig weld them on and weld the holes up.
Note it is better to pre heat them to about 500 degrees .
A plain old hot plate will work.
I have done these on a lot of old tractors with kerosceen heads and they increased the HP considerably and fuel economy.
I have also done this to pullers with 12.5 compression ratios and never had one fail.
A good cheap,reliable way to do it.
Dan Sr.