FE-DOHC has a open chambered head. F2T has a closed chamber head. You'll need domed pistons to make up the compression difference.XsKaPe said:i am also very interested in this idea.
a few weeks back i had a discussion with blind_freddie about creating a f2 DOHC.
i was contemplating purchasing a complete brand new, unused, strengthened f2t bottom end (from a friend), and mating it to an fe dohc head.
from what we discussed, the "oil passage myth" can be relatively easily fixed, by simply blocking up the odd one.
another issue (pretty much the factor that turns me off the whole f2 dohc idea) is compression. somebody suggested that with the fe head on the f2 block, compression would drop to around about 5.1:1.. any thoughts on this?
i think this is a really interesting topic guys and id love some thoughts on it..
Blind Freddie said:the F2T-DOHC been doen before, and besides custom timing belt tentioner there were no hatles.
well the F2-DOHC that was built before byt Jay B was alleged. He told me they used the F2 block/rods/crank and just put a DOHC head and custom pistons in it. Besides the oil buildup in the head it was "OK" power-wise. He said that the guy he sold it too was hyped up about the FE3 revving to 8500RPM and tried that with the hybrid F2-D. Threw a rod. Which is believable because the F2 rods are weaker than the FE3 rods, it was just a matter of time..... or was it???? What doesnt add up about that story is that this was way before Jay did the upgraded valve springs and when everyone still thought the stock dual valve springs could go to 8500 with no prob. when in reality they can barely pass 7k, so how did HE rev up to 8500 then? Jay just upgraded his valve springs shortly before the whole dram`a thing. He told me this story like years ago. Bah well, about a week ago I talked to him and he said he was going for a stroker FE (2.4L) with mostly custom parts. XOBlind Freddie said:point is also missed with Fe and F2 crank........ F2 is 14mm taller to accomidate the stroke
the F2T-DOHC been doen before, and besides custom timing belt tentioner there were no hatles.
from memory. the timing belt was from some kind of merc or porche. the rods and pistons were custom. crank F2T. the drain holes were filled and FE head main hole got machined for a bit of more flow. when the galleries were filled it was taken great care to make sure that the oil will not collect over them. custom belt tentioner was employed.cam22t said:Can you go into more detail?
Are you talking about putting the FE head on the F2T block?
Because if so, you just use a Supra timing belt and change your cam sprockets to F2 ones. As you should know that the timing belts have different teeth profiles.
Good luck and tell us when you've conquered it! I'll be the first to applaud. In the meantime ....matt89glturbo said:I am fully planning on revving my 2.2 DOHC up to 8500 rpms...
When it's done, maybe you'll be a pioneer.matt89glturbo said:it looks like I'm being the pioneer here