Quote Originally Posted by Mr. KiDD
I guess all those open deck 400whp GSRs arent capable of holding boost then
yeah, with the use of a block brace
. I guess all the 500-600whp K20A2 open deck motors are about to grenade.
we're talking about 2 different designs, one is far more superior than the other and to my knowledge don't have the same problem as the B series have. The K series Mazda engines are open deck too and have been known making 500whp or better without the use of a block brace. Call it a good design because Honda did their homework on the new K series which probably wouldn't use a block brace.

The FR"M" Sleeves are fine, and the FRM is not why they fail. Josh Green is right, the PISTONS are the weak link, just like ANY OTHER HONDA MOTOR.


The Cast Pistons are what fail, NOT THE SLEEVES.
I'm not gonna argue the logic of stock pistons failing but please explain warped cylinder sleeves with forged pistons? Why do every other company make iron sleeves for both the H and the B series? Why don't they feel so strongly about the FRM sleeves? Like I said, they aren't ideal for boost and most of them warp after so long. That's why it's best for the F22b bottom end
RPM wise, welcome to hondas, they have to be revved to make power, i thought that was common knowledge?
Not all hondas have to be revved. There's actually hondas out there that make decent power with not alot of rpm.

My comment about the F23 was that they have a big stroke, so you have to respect the rev limiter. As long as you stay away from it they can last. Look at EmminoDaGreats car, makes 280whp stock F23 motor but he doesnt run that power every day.
Good example of decent power with not alot of RPM

H22s will make more power, they are more rev friendly (9000rpms stock is fine with valvetrain), they are a much better designed and efficient motor.

All these people saying the h22 sucks for boost, have never done one.

They are fine for 300whp and under. Ive seen and done many h22s under 300whp WHEN PROPERLY TUNED last just as long as GSRs
I'm not arguing that the H is a bad motor, it's actually a pretty nice power but I wouldn't boost it in stock form. Add the iron sleeves, forged pistons and rods with a good bit of boost and it will be a beast. But boosting it stock...... I don't think so. If you do, no more than 7 lbs MAX!!!