dished or flat top?

[mattynewpuller]

I have an allis wd some guys say the dished are better some say the flats are better. what really is better? i understand that the top ring on a dished is so far down that fuel gets trapped. but dosen't the power crater piston produce more hp? is compression higher with the flat tops?

 

[mark20]

Matty, it don't matter what you put in, your still going to buy supper when I beat you.Are you ready for paint this saturday?

 

[jd plowboy]

i have a wd 45 and i have flat tops in it and it does really good and has good compression. i was told that by the late mr. tommy richardson and he knew what he was talking aobut. iwould go with the flat tops

 

[mark20]

whats the overbore kit for the wd.Is it thinner wall sleaves and bigger pistons .What about the d15 carb ,what did you find out?

 

[mattynewpuller]

(quoted from post at 17:32:53 02/23/10) Matty, it don't matter what you put in, your still going to buy supper when I beat you.Are you ready for paint this saturday?

ya i guess im ready going to see jake friday. haven't found out about the carb yet

 

[NCWC]

The flat tops give you more compression thats the only advantage. Most the compression height on the aftermarket pistons varie so one with a taller compression height the better. The only way that I can get them are in the 4 1/8 bore, I beleive that its the only size that they are made in anymore. You should try to find a WD45 crank that gives you another half inch of stroke with just dropping it in. Email me

 

[mark20]

See you around 4:00 pm?

 

[mark20]

Matty , you should talk to Chads, if I'm going to get my kit there, maybe he deals in wd's too. We'll both go down.

 

[SingleFrontWheel]

I'd go with a dish, and change the rod to shove the piston just as far as I can up to the top of the cylinder. especially on a gas motor..I'd also switch to 175 30 degree valve stuff.

 

[Vic S]

I had 460 ford smog pistons in our wc(they have a cut out in the top) It ran real well would pull second with 15.5's at 3500lb. Changed to 10.5 flat top ford pistons, will power out in second now. hasn't any lug. but has more power reved up. I think would be better with dished pistons and longer rods. The cheapest thing for the money is to stroke it to 5 in. and leave every thing else alone. Be sure and balance everything. they didn't make them very close back then.

 

[Anonymous-0]

I like flat tops. they are lighter than dished pistons . The ring land locations are better . I have had custom pistons manufactured for the 226 allis engine from both J@E and arias . With long communications about both designs. They have assured me that they are no test that could be done to prove that a heavier dished piston even with quench being used on a engine that was engineered without quench would make any more power than the lighter flat top. Also you cannot build a dished piston with a large enough cc dish to park the piston at 0 deck for the advantage of quench on the 226 allis design. Ps i thought you were going to give me a call.

 

[Anonymous-0]

matty also a word of caution . if you change the rod length . you need to have the crank rod journals cammed for that rod some fly by night crank grinders dont consider this but the good ones do. I usually have that done when the crank is being stroked. It can make all the difference in the world on how responsive or lazy the engine is. the piston will travel at the same speed in fpm but the time it dwells at tdc or bdc can increase or decrease depending on which way you change the rod length. I think buickanddeere will agree also.

 

[Anonymous-0]

sounds like you might need better gas

 

[Kip-Utah]

I have not built anything with a longer stroke than the 4.5" 45 crank, but with this combo I prefer 4.125" dished 175 replacement pistons. Kip

 

[Anonymous-0]

i have a wc with combine motor my 13 year old son pulls with 4 1/8 flat tops from a&i 180 allis carb rc gears will spin out in 2nd gear with 15.5 38 pulls pretty good my son did very well at richmond ky super pull last year 1st and a 2nd

 

[Anonymous-0]

kip if you ever had a engine with a compression ratio higher than 8.5 to 1 .you wouldnt look back when it comes to pulling power.

 

[SnookIH]

what rods work best when goin with a 5inch stroke and can the original 226 crank be used when stroking this engine?

 

[Anonymous-0]

Yes the 226 stock crank is what is used. rods are basically a individuals preference. Some think they are building high rpm nascar engines so they want the longest rod you can shove in one. reality is wide open tractor rpms is usually less than the idle speed of a cup car.

 

[mattynewpuller]

mitch i want to go with the wd45 crank sounds like the flat tops are a better way to go and is it worth having the cam ground or look for one already ground. i don't want to put thousands and thousands into my first puller. also what carb should i run with this set up someone told me a m/s 464? from a d17

 

[Anonymous-0]

(quoted from post at 16:35:17 02/24/10) mitch i want to go with the wd45 crank sounds like the flat tops are a better way to go and is it worth having the cam ground or look for one already ground. i don't want to put thousands and thousands into my first puller. also what carb should i run with this set up someone told me a m/s 464? from a d17

I once thought the same about the money. The thing about money is what you spend on the first motor is gone when you decide you need more. Cams are youre choice Jt/barney cams are being copied by every person with a cam grinder so .its really youre choice. I wouldnt use a ms 464 carb but I do like my competition to run them cause i know they arent getting enough air into the motor to make power to its full potential.

 

[mattynewpuller]

any suggestions or do you not want your competition to see!

 

[mark20]

Go see Willy and get that wd45 motor! That way you will have the cam and crank

 

[mattynewpuller]

willy has a wd same as mine or else i would. you going to be around tommarrow at 4:00?

 

[Anonymous-0]

(quoted from post at 18:16:16 02/24/10) willy has a wd same as mine or else i would. you going to be around tommarrow at 4:00?

TALK to kendak or scott and see if any of my suggestions ran in their tractors.

 

[mark20]

I dont get off till 5:30. I thought Tommys old tractor was a wd45

 

[mattynewpuller]

sorry i ment friday and no tommys was a wd

 

[mark20]

I should be home around 2:00 . We'll take both motors down.

 

[mattynewpuller]

whos kendak or scott and how do i get ahold of them

 

[Anonymous-0]

scott posted on this topic. kendak posted on the johndeere 520 lp tractor topic on this forum.

 

[Anonymous-0]

my email [email protected]