At first my plan was to take Arias pistons with 8.0cr for a 500hp(maybe more) setup on a b16a.
Unfortunatly they are not available in the moment.

Now I thougt about taking Wiseco with 9.0cr. Is this a good or bad idea?

Thanks for your help.

 

Very bad idea the compression is waaaaaaaay tooo high

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">Very bad idea the compression is waaaaaaaay tooo high </TD></TR></TABLE>

thats exactly what i say too
but why is it so complicated to get &lt;9:1 Pistons in general?! if you take a look then there are not much companies producing &lt;9:1 Pistons... or does anybody knows some more?

Greets
Malte.

 

I didnt know it was hard? prob about 75% f the board is running 9:1. I never had a problem finding them.

 

its not going about 9:1 Pistons, i mean &lt;9:1 Pistons (8:1 i.e.)

you can buy 9:1s on every corner thats not the problem and not 75% of the forum are running 20-25psi and making 500+WHP

so for the most 9:1 is great, but for 500+WHP i think its a bit high and i find it is very difficult to find pistons with a lower cr then 9:1... if you know a source, please let us know...

Thanks
Malte.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">I didnt know it was hard? prob about 75% f the board is running 9:1. I never had a problem finding them. </TD></TR></TABLE>

Your "User Biography"

2001 ITRT 2.0Liter V8 Eater
JE 9.3:1 Forged Pistons

It's not hard but you're not using it yourself.

 

What does my set up have to do with it. Mine were prob 9:1, but the prev owner told me it was prob a tad more becuase they were custom jobs. not off the shelf. It still doesnt mean they arent out there. BTW Smart ***. . . This wasnt my only block

9:1 is not high for 500whp , trust me. there are people runnig alot higher.The compression just has to do with how you wanna make your power. Pump gas or Race gas.

This is how hard they are to find

http://cppistons.com

Part# Engine Code Bore Size CH CR Application
SC7000 B16A 3.189" / 81.0mm STD 1.181 9.0 1,2,4
SC7001 B16A 3.209" / 81.5mm +.020 / +0.5mm 1.181 9.0 1,2,4
SC7005 B18A1/B1 3.189" / 81.0mm STD 1.181 9.0 1,2,4
SC7006 B18A1/B1 3.209" / 81.5mm +.020 / +0.5mm 1.181 9.0 1,2,4
SC7010 B18C1 3.189" / 81.0mm STD 1.181 9.0 1,2,4
SC7011 B18C1 3.209" / 81.5mm +.020 / +0.5mm 1.181 9.0 1,2,4
SC7012 B18C1 3.268" / 83.0mm +.080 / +2.0mm 1.181 9.0 1,2,4
SC7020 B - Series 3.307" / 84.0mm STD 1.181 9.0 1,2,4,9
SC7021 B - Series 3.327" / 84.5mm +.020 / +0.5mm 1.181 9.0 1,2,4,9
SC7022 B - Series 3.346" / 85.0mm +.040 / +1.0mm 1.181 9.0 1,2,4,9

Acura/Honda K20A / K24
Part# Engine Code Bore Size CH CR Application
SC7040 K20A/A2/A3 3.386" / 86.0mm STD 1.181 9.0 1,2
SC7045 K24 w/K20A/A2/A3 Head 3.425" / 87.0mm STD 1.181 9.0 1,2
SC7030 H22A1 3.425" / 87.0mm STD 1.220 9.0 1,2,5

http://www.jepistons.com/pdf/2...a.pdf

http://ariaspistons.com/sportcompact.pdf

I can find more for you if you want. Do some research

 

So why do some of you keep saying that 9:1 is too high now? I'm lost..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by newgsr &raquo;</TD></TR><TR><TD CLASS="quote">So why do some of you keep saying that 9:1 is too high now? I'm lost..</TD></TR></TABLE>

I was being a smart ***. I think anything lower is retarded, but thats me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">

I was being a smart ***. I think anything lower is retarded, but thats me.</TD></TR></TABLE>

No no not you, I know you know better!! hehe...

 

For my own intention, 9:1 seems to be very high for 500hp. Here in Germany, we just can get pump gas and no chance for race gas.

I know the companys above in this thread, and made contact befor. The only company that could provide us with pistons for lower!! than 9:1 was Arias.
But Arias Pistons can not be delivered in the moment. This is the problem.

If anybody knows a source for lower than 9:1, please let us know.

I think I´ll give Arias a call :-)

 

whats the highest available octane overthere??

519whp on 91 octane pump gas, 9:1 compression check it out!!

https://honda-tech.com/zerothread?id=1069470

 

on a military post I can get 98 octane super plus, in the German economy I don't know! I heard the fuel is better in the German economy though....

 

98 Octane in germany are not 98 Octane on USA... i think its aprox. -4 points, so 98 German Octane are something about 94 Octane in the USA if i'am right...

maybe it will work with 9:1 but the kit must also be reliable ;-) thats out main goal and i think thats easier with 8:1 then with 9:1 ...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrx &raquo;</TD></TR><TR><TD CLASS="quote">98 Octane in germany are not 98 Octane on USA... i think its aprox. -4 points, so 98 German Octane are something about 94 Octane in the USA if i'am right...

maybe it will work with 9:1 but the kit must also be reliable ;-) thats out main goal and i think thats easier with 8:1 then with 9:1 ...</TD></TR></TABLE>


You think or you know?
Any company can make 8:1 pistons. They mor then likely will not be ff the shelf so you will need to wait for them.

 

i know that the meassurement is different... how much i'am not sure but i think it is a difference of aprox. 4 octane.

 

if your in germany use shell vpower its 100 octane RON(100RON aint 100 octane in the us) watch out v power differences in other countrys like holland:97octane RON