Hi

What sort of pistons would people suggest that would work well with the JUN IIIs? Thinking along the lines of CTR oversized, this giving roughly 11.1:1 cr. What other options could i think about?

Thanks

 

the bigger in size and compression, the more power those cams will make

 

Whats the max cr i could goto whilst keeping it a good daily driver?

 

My buddy ran Jun III's, GSR head, B16a block, CTR pistons... put down 170whp on a MUSTANG dyno... that's good for 185-190 on a Dynojet.

 

11:1:1 comp is good for jun 3's but not good enough i would say try to at least go with 12:1 comp or higher that is if you have 93,94 gas in your area remember these cams love highcompression.
also by the way ctr os pistons will give you a 10:8:1 comp unless you opt for the 2 layer head gasket which will be just about 11:1:1

 

I thought they would give me 11.1:1 because of the b16a's shorter deck height?

What sorta pistons am i looking at to give me 12:1 cr? Im not wanting to sleeve the block or anything.

 

Anyone?

 

yeah it gives you 10:8 cause of the b16 deck. if you had the b18 block with your b16 crank with 81.25mm ctr pistons then you would get 10:5:1.
if you want 12:1 on your b16 you can go with some aftermarket pistons like je,wiseco.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MuJun &raquo;</TD></TR><TR><TD CLASS="quote">I thought they would give me 11.1:1 because of the b16a's shorter deck height?

What sorta pistons am i looking at to give me 12:1 cr? Im not wanting to sleeve the block or anything.</TD></TR></TABLE>

Yes, it will give you higher compression because b16a's have a shorter deck height than the b16b... the b16b block is an ITR block...

 

oversized CTR or custom JE 12:1

 

oh i'm talking about CTR oversized where instead of 10.8 as normally quoted they will be higher, like 11.1, on the b16a block as opposed to the b16b...

 

Ive seen a few pistons which are 81.5mm, would you be able to bore the .5mm from the std b16a block without resorting to sleeves?


Modified by MuJun at 11:40 PM 12/7/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unsung EM1 &raquo;</TD></TR><TR><TD CLASS="quote">My buddy ran Jun III's, GSR head, B16a block, CTR pistons... put down 170whp on a MUSTANG dyno... that's good for 185-190 on a Dynojet. </TD></TR></TABLE>

Do you know what the cam gear settings were?