1855 oliver field stock build

2150 · Jul 27, 2023

Looking into the IPAs new field stock class. Pretty simple rules 426 cu limit 2500RPM limit P7100 limit they supply a s362 box turbo that you are not aloud to alter must be stock block and head for make and model. Stock intake and exhaust manifolds. No intercooler allowed. And no de-cubing allowed. My question is it possible to get a 310 waukesha to compete with these rules? Can you get them bored close to 426? Can you get the head to flow ample amount of air even though it's not a cross flow head? Am I wasting time? Is there an official bulletin that states a cummins is the OEM replacement block (much rather go this route for ease of parts) any and all info is greatly appreciated

Here is the official rules from the website if I missed anything https://www.illianapullers.com/10500-field-tractors/

scootergmc · Jul 27, 2023

I don't know of any factory service bulletin with a Cummins retrofit. If there is, I haven't seen it and I've seen at least five binder's worth of Oliver service bulletins.

There are a few Oliver pullers here so someone should reply with some good info. You could also try pulloff.com. I googled the term "Waukesha 310 puller" and one of the results from this site was this:

easy 310 build Buy a set jd 4020 m&w sleeves and pistons. Offset grind crank 2.00 inch and use 77 rods. Cut the top off of pistons and you will have a 425-433 cube engine that will go together very easy

RCP · Jul 28, 2023

I have been pulling Oliver tractors for 40 years, and I do not see a good way to make
an Oliver competitive with those rules. A 310 could be bored and stroked to 426 IN3,
but it would be expensive and probably not very reliable and still not competitive.
You could build a 2150 clone and decube the Hercules to 426, again expensive.

There were programs to replace the 310 with a Cummmins 5.9 but those programs were
promoted by companies that sold Cummins engines, not White or AGCO. Even then you
would be smaller than the competition by 60 IN3.

Out of curiosity, how are they enforcing the 426 IN3 engine limit?

2150 · Jul 28, 2023

They bottom out a piston and pull the injector and pump fluid in. Then they have a formula that tells how bigger it is by how much fluid was pumped in

RCP · Jul 28, 2023

Do they do it on every tractor? And how often?

2150 · Aug 8, 2023

they do it to every tractor before the season starts and then they will do it again if a tractor is being protested

1855 oliver field stock build

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