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Predator 212 bore
- Thread starter mgilker
- Start date
openoutlawdude
New member
With a new sleeve you can take it over 3", but you wont get a piston much bigger than 3" in the block, there simply isn't any room for it, at 3" bore you're already having to weld up the oil port to the right of the bore, and in the head to keep from having head gasket sealing issues.
I recently tried to bore a Hemi block to 2.913". It made a clean cut up to 2.871". It cut through the sleeve at 2.891". Some folks have said that they will take the 2.913", but I know of only one guy that it worked with. And that was an old non-hemi block. I sent mine off to have a sleeve put in for the 2.913". It's a smaller sleeve than the typical 3" bore sleeve that you get from NR or Isky. I bought it off of Summit Racing for $26 and its long enough to cut in half and make two sleeves. I have had several Honda blocks sleeved for 2.992-3.031" bores. The sleeves are around 3.180"-3.25" O.D. The larger sleeves will cut into to upper bolt holes so it's best to use one that is closer to 3.180" or you'll have issues with the top head bolt threads. There's no real issues inside the block when using the 3" bores. Actually there's less clearancing to do in some areas because of the bigger bore. I always recommend that any 3" motors have bracing welded on, but I have seen a Honda 3" motor make 27 hp on my dyno without welding and no issues. Also I had an unwelded predator make 28.88 and multiple pulls to 9600 rpm. I was standing back for sure, but it held together.
I am new to this and would like to try to do the whole boring thing on my mill. Would you be willing to help me find parts and give me some guidance?I recently tried to bore a Hemi block to 2.913". It made a clean cut up to 2.871". It cut through the sleeve at 2.891". Some folks have said that they will take the 2.913", but I know of only one guy that it worked with. And that was an old non-hemi block. I sent mine off to have a sleeve put in for the 2.913". It's a smaller sleeve than the typical 3" bore sleeve that you get from NR or Isky. I bought it off of Summit Racing for $26 and its long enough to cut in half and make two sleeves. I have had several Honda blocks sleeved for 2.992-3.031" bores. The sleeves are around 3.180"-3.25" O.D. The larger sleeves will cut into to upper bolt holes so it's best to use one that is closer to 3.180" or you'll have issues with the top head bolt threads. There's no real issues inside the block when using the 3" bores. Actually there's less clearancing to do in some areas because of the bigger bore. I always recommend that any 3" motors have bracing welded on, but I have seen a Honda 3" motor make 27 hp on my dyno without welding and no issues. Also I had an unwelded predator make 28.88 and multiple pulls to 9600 rpm. I was standing back for sure, but it held together.
I DONT TINK SO!, them things come apart just as they are without going 3", if you can get yourself a tillotson block, you will save a lot of head ack and they have a 3" block ready to goAh, OK. Yeah I was wondering if it could have a 420 piston in it but I guess not.
Another member may be able to offer guidance, but the guy you replied to hasn't been on here in 5 years.I am new to this and would like to try to do the whole boring thing on my mill. Would you be willing to help me find parts and give me some guidance?