F22 with vtec?

Post by **ek9sid** » Sat Jun 18, 2016 4:15 pm

Hi guys. Been looking around for a while now for an answer but nothing concrete as yet.

A friend of mine has got hold of an f22 engine from a 5g. He's wanting to vtec it (if that's even a term) and then boost it. Anyone heard of that being done before? (Namely the vtec conversion).

Tia

Post by **4thgenphil** » Sat Jun 18, 2016 6:48 pm

Head swap with a h22 head.

Post by **ek9sid** » Sat Jun 18, 2016 9:11 pm

Is it just as simple as that? No drilling for oil ways/blocking others off? F22 or h22 head gasket? And belt? Not got much knowledge on the first series.

Thanks for the heads up though

Post by **4thgenphil** » Sat Jun 18, 2016 9:29 pm

Look up g23 builds.

Iirc the f22 block has an oil way for the vtec.

Youll need a h22 water pump, belt and id say head gasket.

Iirc the bore of a f22 is 1mm smaller than a h series.

Also the bottom end could do with balancing.

Alot of this is from memory though.

Post by **NafemanNathan** » Sat Jun 18, 2016 9:36 pm

H22 is 87mm bore. F22 is 85mm. Deck height is the same, so H22 belts should fit.

Post by **ek9sid** » Sat Jun 18, 2016 10:47 pm

Thanks guys. So you think f22 block and bottom end with h22 head and water pump should be a direct bolt on? Excellent news. And thanks for the heads up on the g23...will have a look into that. Very much appreciated

Post by **JEBB4** » Sun Jun 19, 2016 4:43 am

Hmm I thought about doing a vtec head swapp on my h23a1 but I thought there's not a lot of point as the bottom end on h22 is made for vtec and therefore stronger and I don't know if they have the oil sprayers for the Pistons.. I've seen people do vtec head swaps on the b serious for a b20 and it lasted about a week before the bottom end went... If it's guns be done it's probably best the put some stronger con rods etc in..

mercutio · Post by **mercutio** » Tue Jun 21, 2016 10:02 pm

yeah i think you can retrofit the oil sprayers but they wont help the bottom end as they spray up the cylinders dont they???

Post by **4thgenphil** » Tue Jun 21, 2016 11:17 pm

The crank isnt necessarily stronger on a h22, its balanced a little better.

Oil squiters can be retro fitted to a h23, not sure about f22 but need some adjusting so they dont clash with the pistons which the spray up underneath of.

Big issues are the pistons speeds of a f22/h23 crank because they have to travel further for the same revs on a h22 and also the rod angles at the higher revs.

For the hassle id just drop a full h22 in or stick with the f22 and sprinkle some magic on it like pistins and cams.

Ive read the f22 head is meant to flow better than a h22s.

Vtec is over rated any way

Post by **Vtecmec** » Wed Jun 22, 2016 9:01 am

4thgenphil wrote:Vtec is over rated any way

Wash your mouth out!