6.7l 12valve
 

have a buddy whos rings are going bye bye and we are thinking about boring it out to a 6.7l and making a 6.7l 12valve is this realistic at all or is this impossible or what do you recomend we do

If you want to bore it out maybe the best idea would be to bore and sleeve the thing back to stock size so you can use stock pistons/rings. I think the problem you'd run into with off the shelf 6.7 parts is fitment and spray pattern / piston bowl issues as well.

IIRC it wont work. Crank is differant. The bowl in the piston is differant. You'd have to switch to a 24V head. Now you're into custom feed lines, crossover tubes, injectors.

It might be easier (and cheeper) to buy a used 6.7 and convert to p-pump.

Really? how many miles?? thats a first??

With just the pistons it wouldn't end up 6.7 u wounld need to stroke it

P-pump 6.7.... ooooohh ahhhh!

The recipe I can see working is: 6.7 short block, 24 valve head and timing case, and a P-pump. Could be fun. :D

But a commonrail motor will make more HP.

thats what i am thinking the truck had 550,000 roughly maybe scrap the 12 valve and make a beast sleeper common rail that wouldbe insane butits not my truck and not my 10,000to do that lol so its not up to me

I would say just rebuild it stock and use the bundles of extra money to buy twins and sticks and put the common rails behind you

I don't remember the particulars but, there is a truck in this month's Diesel Power with a similar combo. The owner uses it for sled pulling.

Not going work boring it out to a 6.7 bore size. The 6.7 has has the block clyd walls cast together like a chevy 400 SB. No water passage between the walls..