bisimoto pistons and rods

[deevergote]

Smart. A project car makes a lousy daily driver, especially if it's boosted!
I have 3 cars. One is driveable right now. And even THAT needs work!

[Youngill726]

going to order some bisi f22 rods. yea imma need a dd after all this bs

[WiKKeDV16]

Compression wizards..what would his compression be??


H23a engine
H23a crank
F22a/h23a bisi rods
H22a mahle slugs
H23a head

I'm aware the compression would go up.. but how much so
Considering the mahles are 9:1..

[WiKKeDV16]

Compression wizards..what would his compression be??


H23a engine
H23a crank
F22a/h23a bisi rods
H22a mahle slugs
H23a head

I'm aware the compression would go up.. but how much so
Considering the mahles are 9:1..

[d112crzy]

We'd need to know the compression height on the pistons and the dome cc.

But assuming the CH is the same as the stock H22's, and by taking into account that a USDM h22 pistons(-2cc dome/31mm CH) in an otherwise stock H23 would put you at 11.0-11.6:1 depending on HG. So I'd say close to 10.5:1 or so.

[WiKKeDV16]

ha.. i figured it would be around that.. i thought closer to 10:1 but regardless.. looks like hes gonna have pretty decent torque band when all said and done..


his original goal was 300wheel.. with that compression i dont see that as being a problem.. at even a mier 10psi

[d112crzy]

according to this, http://www.importperformanceparts.ne...old-honda.html the pistons are -7cc. That would put the h23 at 10.7:1.

Regardless, 10psi on the correct turbo should make well over 300whp even on 9:1 compression, given the rest of the engine can breathe properly. I think Mike(lodollar) told me he made over 300 on 8psi on 8.x compression(i think).

[WiKKeDV16]

good shit then.. since the compression is being raised.. obviously its from the pin location being lower on the piston( thus allow for a taller deck height).. now my question is..

will they.. and if they do.. how much... will they come out the cylinder?

[d112crzy]

They'd stick out .02", just as it does on my H23 vtec. I'd recommend a thicker HG to lower compression and be sure the valves don't touch the pistons due to the different valve reliefs on the pistons.

[WiKKeDV16]

does cometic sell for h23? i doubt it...??

[d112crzy]

doubt it

[Youngill726]

should i just reuse the factory rods and pistons and just get aftermarket rings. isnt 10 a lil to high for boost?

[Youngill726]

got my pistons now waiting on bisi rods and heat shield intake gasket. just waiting on response for head gasket from bisi.

[Youngill726]

got my rods in yesterday but it gonna take bisi a week for that headgasket. any more suggestions u guys got for me?

[Accordtyper91]

im running bisi 10.5-1 compression pistons and there H beam rods and im turning 9500rpm so needless to say im happy as can be. they are not cheap but they are worth every penny