IM thinking about trying out the MAHLE GOLD SERIES... in a all motor build though.

I see you can get a 11.5 CR piston.

Question... if you use a H23 block, rods, and crank, wth a H22 head - I know this increases the CR .. but how much? It doesnt have to be street driveable..

Ideas? has anyone done this yet??

I would mate it up to a head with crower stage 3s...

 

11.5 CR in an h23 or an h22?

 

h23 block. i used manley turbo tough rods and wiesco pistons.

 

for just 11.5:1 you might as well just get type S pistons because your cr in a h23 with h23 crank and rods is still going to be around 13:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IAluder95 &raquo;</TD></TR><TR><TD CLASS="quote">h23 block. i used manley turbo tough rods and wiesco pistons.</TD></TR></TABLE>

I was asking the CR for which engine, if the pistons are 11.5 on an H23 and you put on an h22 head, you will get a much higher CR, but if they are H22 pistons then it be as high because of the different volumes

 

BUMP... i think you guys are confused by my question...

Im not looking for 11.5CR... those are the CR of the pistons listed on Mahle website. Thier H22 pistons.

I would like to build a H23VTEC engine... using the above mentioned pistons.

I would like to get into the 14:1+ range.. is it gonna be possible with these 11.5CR pistons with H23 rods, and H23 crank???

 

I think I found my own answer...

gonan be around 13+ CR ratio.. which should owrk just fine.

If anyone can cnfirm this, and has some experiance.. let me know.

 

I don't know the success people have had with the Mahle gold in the FRM but if you're looking for a serious motor build, which it appears you are if you are wanting 14:1 compression You might consider just sleeving the block, also you also might want to look into such possibilities of headwork to achieve a higher CR rather than pistons with a huge dome. By having a large dome you also have less turbulence, worse fuel atomization, and greater separation of the combustion chamber... just something to think about

 

use type s pistons and thin head gasket... it might not be all the way up to 14:1 but you know those would be safe in your motor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazykid &raquo;</TD></TR><TR><TD CLASS="quote">I think I found my own answer...

gonan be around 13+ CR ratio.. which should owrk just fine.

If anyone can cnfirm this, and has some experiance.. let me know.</TD></TR></TABLE>

I came up with 12.8:1 compression

 

in theo ther thread someone said the MAHLEs actually come out to be about a 12:1CR piston casue of their volume or something. Like I said im new... I would like to make about 275WHP... and no im not looking for a daily driver, its gonna be a race car.

What would I expect with the Type S... I see thier a bit cheaper then the Mahles, and I dont wanna sleeve a blcok this year... if I do, im not gonna go high cr.. im gonna go low and try to go fast with big boost.

I would like to go high 11s in a street car build. EG HB. Slicks and race gas.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazykid &raquo;</TD></TR><TR><TD CLASS="quote">in theo ther thread someone said the MAHLEs actually come out to be about a 12:1CR piston casue of their volume or something. </TD></TR></TABLE>

if you can find out the dome CC of the pistons I can be more exact.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H23 Power &raquo;</TD></TR><TR><TD CLASS="quote">

if you can find out the dome CC of the pistons I can be more exact.</TD></TR></TABLE>

I found somewhere listed them at 10 cc which would brind it to 13.6:1 in a H23 VTEC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H23 Power &raquo;</TD></TR><TR><TD CLASS="quote">I found somewhere listed them at 10 cc which would brind it to 13.6:1 in a H23 VTEC</TD></TR></TABLE>

Yeah thats what i was thinking aswell... that would be alright, i dont think i can mill the head at all from what im reading, but 13.6:1 should work fine for what i need.

Thanks guys.. if and when we get the project underway, there will be plenty of pics and ill try to share some info.