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Here is the combustion chamber.

 

Here are some specifications on the engine I gave them to you once but this way you won't have to look it back up.

bore 5.319 + 0.030 = 5.349  stroke 6 Max RPM 2262

Compression ratio 9.3:1
valve size 2.375" intake and 2" exhaust rocker ratio is 1.5 to 1 Combustion chamber depth 1 5/64's
I think this is the cam I have
Intake opens 9deg BTDC Intake closes 38 deg ABDC
Exhaust opens 47 DEG BBDC Exhaust closes 7 deg ATDC
lobe lift is .318
This is the HD800 cam.
Intake opens 20deg BTDC Intake closes 40 deg ABDC
Exhaust opens 40 DEG BBDC Exhaust closes 20 deg ATDC
Valve lift .379

Here are the ports they are exhaust intake exhaust. 

This is an old picture of the carb and vaporizor I'll try to get you a picture of the current set up I have the same carb but two vaporizors.

Here is a picture of the Mag and coils I'll try to get a better picture.

This is the first pull after I went through the rearend and ringed the engine.  I didn't do anything more than that to it.  I'd like to bore and stroke it.  But I need to learn all the little tricks first. 

It needs paint but I still have a few changes to make first.  It looks a little different than this now.  It runs 8 to 11 MPH in the 7500 and 8500lb class.  I hope I made enough changes to get it down to 6500 and have a few more to make and hopefully that will get it to 6000.  I don't have the money to get it to 5500.  I'm looking for a set of gears to make it go 14MPH or so.  

Here is a link to page that has some more pictures and information the this tractor again that page isn't up to date and I've never added a link to that page from my home page.

http://fiorelli.tripod.com/pull/GB/GBpulling.htm