an H22 with type S pistons and crower rods?

(and an aftermarket valvetrain of course)

I'm thinking around 8300? whats the type S redline, 8000?

 

I would NEVER rev the H22a no matter what it had over 8,000... The R-S ratio is terrible..

 

The Prelude TypeS has a 7400rpm redline and 7800 rpm fuel cutoff - just like the "regular" H22a.

Andrew

 

really depends on what the power band of the cams are.

if you're still running stock cams, then possibly move the vtec engagment point up to see what numbers it nets you above 7500rpm.

probably about 8000-8500 rpm on a dyno max.

the rod to stroke ratio may be horrible but that's how you make the power. case in point, the b20vtecs and lsvtecs.

 

your right about the B motors, but the lsvtec and B20 isn't THAT much worse then a b18C5... Its very slight...

I can't remember what the r/s ratio is on the prelude, but its a good bit worse than any B motor..

Grant Lockwood, who used to race a World Challenge prelude, it was a H23A vtec frank motor, well, blew several times trying to get the thing to rev, rods through the block sort... But, it was also pushing 240hp to the wheels

 

yeah, the r/s ratio is definitely far worse on the h series motors but that's how we get our displacement. i'd much rather have the torque then a better r/s ratio, for street use anyway.

i've heard about the infamous h23a frank motor. but also remember the h23a has far worse r/s ratio then the h22a.

i guess there has to be a medium somewhere.

 

yea, F1 cars found it... bastards rev to 18k

 

My H22a redlines at 8k, stock..JDM ecu, that is all.

 

i think your tach is off.

 

I agree

 

..I like playing w/ how little I rev the motor, going thru the gears say up to 5K, and working on driving skill.