I've checked, and with the 162mm rods the 4g64 2.2 has a rod/stroke ratio to 1.72, which is higher than stock, but also has a longer stroke and a larger displacement, how come this engine isnt seen more widely?

 

You would need to use a custom 159mm rod in the 4g64 2.2, or a custom piston with appropriate compression height for 156mm rods. The 162mm rods will require a piston compression height that is too short.

 

Okay thank you, it was sounding a little too good to be true

 

So i found a build that uses 162mm rods, and the wrist pin is so high it essentially touches one of the piston rings. I guess 159mm rods it is.

 

all stroker pistons have pins thast go trough the oil rings.. nothing wrong with it..

problem with 162 mm rods is that they are not widely available.. 156mm on the other hand is quite common..

 

156 mm rod 2.2 is an off the shelf piston from wiseco and CP... CP even has a 2.2 piston that works with 156 rods in g63.. so a 162 mm rod in a 2.2 litre g64 is really not an issue....

 

Absolutely love my 2.2. Has low end and will rev to the moon. Perfect if you plan on having daily duties IMO

 

156mm rod on a 4G64 2.2 and a 100mm rod on a 2.0 dont cut through the oil control rings. Its still early but my 2.3 (150mm rod, 6mm raised wrist pin, 100mm crank) had lots of blow by and collection in the catch cans. Same build, specs, and literally same machines my 2.2 (156mm rod, 0mm raised wrist pin, 94mm crank) hasnt accumulated anything in the catch can.

My builder (does lots of 4 digit BMW and Supras) would much rather have me not cut through the oil ring than a little more R/S ratio.

 

Oops, I think it was a 3mm offset writst pin on the 2.2. The 2.4 block with a 94mm crank either needs a custom 159mm rod or the manley 3mm offset piston (Or custom 3mm offset from someone else).

In general, 4G's are like legos and everything works in increments of 3mm.

 

Im currently planning on going with Carillo pro H beams, Ive seen that a lot of reputable engine builders use them. Because I am probably going with custom connecting rods anyway (159 mm or 162 mm). But if youre saying that moving up the wrist pin causes blowby (which i believe) than it would probably just make sense to run a length of 159mm.

 

159mm puts the wrist pin 6mm higher than stock and the same location as a 150mm rod in a 2.3l. Its what I'd consider to be the limit of where youd want to go. Go up higher and you are almost fully cutting through the bottom of the 2nd compression ring.

I would have done a 159mm if I could get it OTS but I did my latest build mid season and couldnt wait. So the 156/+3mm is easily available. I wouldn't ever do a 162mm, it just moves the pin higher than Im comfortable with.

 

A 159 mm rod would move the wrist pin up 6mm then correct? Running a 159 and a +3 mm piston would end up hitting the valves correct?

EDIT: Okay so I have done some more research, and Im thinking of going with a custom 159 mm Carillio H pro and than a CP piston "stroker style" (6 mm moved up wrist pin) that has stated CR with a 100mm crank of 10.5 (part number SC 7264). Now if my calculations are correct, that should yield a MAX compression of 9.95:1 (this doesnt include oversize valves or bore matching the head). Does anyone know what the head volume is in CCs with a bore matched (87.00mm) head? I plan on running 93 octane. the amount of driving I do makes it so I dont always know when i will have e85. I was also planning on a 1.3 mm head gasket, how could i get it to the perceived "ideal" amount of quench?

 

Did I read that correctly, you want to hang 159mm rods and pistons with the wrist pin moved up 6mm off a 100mm stroke crankshaft in a 4G64?

 

i believe he is aiming at 94mm crank and 2.2 engine..

 

No, I am going for a 94 mm crank. CP-Carillo doesnt make pistons specifically for a 94 mm crank, and i was trying to figure out if I could use their stroker style pistons anyway so I dont have to run custom rods AND custom pistons. Because if my searching is correct, for 93 Octane you do not want to go over ~10 CR, so I am aiming for a ~9.5 CR.

Bingo