engine build ?

Mitch Pankey is who you need to talk with. Scan for his posts under "MLPankey".

to out pull a Baker or Marlatt,Lemmons built m one must spend the $25000 on the other brand of engine( allis)  like the m owners did.

Edited by mlpankey - 26 Nov 2010 at 7:52pm

5 3/4 stroke and 11.1 compression.

You can bore the block and have custom sleeves made to wind up with 4 5/8" finished bore......been there...dun that.

brezenski does it . boring the block  for 4 5/8 sleeves cost as much if not more than having a crank stroked.  if you have a good solid head you can open the intake runners up to 1.940 and add 1.940 intake valves the guides need to be trimmed so they dont stick into the combustion chamber any ways. if it doesnt sonic test good for 1.940 1.88 is usually safe . i go 1.940 and fix the thin areas when they open up.

Edited by mlpankey - 27 Nov 2010 at 5:21pm

if you pumped enough alky through it to keep  the valves and guides cool.  I like belzona better than hard block for making ports and embeco is cheaper than hard block and does the samething as hard block.  also i  would tend to think smuggler that you ran chargers so the csa of the runner wouldnt be as big a factor as it would be in a naturally aspirated engine.

Edited by mlpankey - 27 Nov 2010 at 5:24pm

alky is hard on guides do you run toplube?

ML yea we run top lube, The old cast head is just wore out, alot runs onit with little matenence. The guy who owns it now just likes to pull dont really work on it much. He broke the cam in half at the last pull so its gotta come here for repair. We have to run alot clearence on the guides to begin with or they were hang. that dont help

What is the trade off for the smaller 4.125" bore in terms of vlave shrouding, and vlave positioning in the stock bore locations?  Have you flowed heads with a 4.125" bore adapter compared to a larger one?   That's part of my reasoning for just slightly longer legs on the exh. side, but 2-4 deg less than the intake may work better depending on rest of the parts.  Depending on the rules here, once in a while there is no RPM or speed rule and one can turn the engine a little in the "stock" classes.

i flowed the 3 inch head and the four inch head on a flow bench at 4.125 bore and at 4.600 bore . I will tell you that the exhaust flow of 95% of the  flow of the intake on a flow bench when the push of the piston on the exhaust stroke comes into the formula means the exhaust side will flow 105% of the measured cfm the intake runner lets into the cylinder. a six inch stroke with a short rod and a piston speed of 6000 fpm will change the inches of depression dramactically over the inches measured on the flow bench thus doubling the intake valves flow bench measured cfm . if one needs me to run the computer generated data to support this I can but some think when I do that . That i come off as a know it all. I can say that I am still learning through trials and errors power tunning secrets and never have posted any of it to be considered a know it all but to help and learn from fellow allis pullers that are seeking performance and willing to share the experiences of performance modifications. To put the orange tractors out front. wi 50 i ran a 310 engine for along time before going big on the bores.

Edited by mlpankey - 28 Nov 2010 at 3:48pm

4.600 plus bore will out flow the 4.125 bore on the bench . crank stroke = piston speed and cubic inches .  All I am saying is 1200 for a 4.625 bore or 1200 for a six inch crank . The biggest return for the 1200 is crank stroke. 4.625 x4.5 =302 ci 4.125 bore x6 inch stroke is 320ci  both are capable of making the exact hp because of the head but the rpm at which they do it will be a big difference .

I had a 450 inch d-17 motor it was hard to get up with the m and 88 in the open classes. It takes alot of $ and up keep on big engines. 4.25 / 5.75 is a good running set-up. I have sleeves for 4.25 bore. 6 inch with billet rods

the stroke i was running was over 6.250

thanks for the info but  i think for this year i'll have some head work done and cam work and hope for 70 h.p with the wc and diff tires,

redallis,