Allis 426 September 08, 2020 03:04PM
Just curious, what kinda power can you make with a 426 Allis block before she splits? Just wondering for buying one in the future if I can make the amount of power I want to without serious carnage. Thank you

Re: Allis 426 September 08, 2020 03:09PM
2500 is pretty safe, very much over that and your pushing your luck, 200lbs to 230 on boost is about all you want, much over that on a regular basis and the block will let go.

Re: Allis 426 September 09, 2020 11:50AM
Why wouldn’t you go with a 516?

Re: Allis 426 September 09, 2020 12:02PM
Depends on the rules of your class. Cubes and head have a lot to do with it.

Re: Allis 426 September 09, 2020 01:54PM
I think that would be more than plenty power wise, I just hear the odd person say they won’t take serious power. Does anybody know who builds some of the best Allis blocks in the USA? I could go 516, just wondered in general for the block itself, not necessarily cubes. Thank you for all the knowledge guys.

Re: Allis 426 September 09, 2020 02:11PM
Most will tell ya max Simpson or mark gettinger,both in builders directory I think

Re: Allis 426 September 10, 2020 03:51AM
What cubic inch will you b running ?

Re: Allis 426 September 10, 2020 05:36AM

Re: Allis 426 September 10, 2020 09:50AM
I'd go series 40 if you are worried about block stability.

Re: Allis 426 September 10, 2020 07:59AM
The class will be a max 540, p pump. Just wanna get my ducks in a line before I spend the money. I may even get lucky and one comes up on here.

Re: Allis 426 September 11, 2020 12:28AM
If it is a 540 cube limit, and you are allowed a custom made cylinder head, if you spend as much money on injectors, injection pump, valves/lifters/camshaft and single turbo as all the Deere and IH guys do, you will be fine.

Re: Allis 426 September 16, 2020 02:09AM
Who makes these custom cylinder heads? Will having .250 shorter rods on a stroked crank hurt your power potential? (Ford diesel truck rods)

Re: Allis 426 September 16, 2020 09:49AM
At one point Indy Cylinder Head was doing AC 426 heads.

Re: Allis 426 September 17, 2020 12:33PM
Himes or Hines cylinder heads are what I hear about. Flows air comparable to IH or Deere.

Re: Allis 426 September 14, 2020 01:36PM
Dave from Wipeout did very nice job for us 531ci..


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