What do I need to put some ctr pistons in a B17 and what would be the compresion ratio... Would this be good or bad thing to do?

 

Hey this ain't got **** to do with your question do you got cable b17 Tranny>>??

 

probably wouldnt need anything, and 11:0

 

go to http://www.c-speedracing.com they have a compression calculator.....

edit i did it for you its around 11:3.1 ...importantly make sure your clearences are on

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slain &raquo;</TD></TR><TR><TD CLASS="quote">go to http://www.c-speedracing.com they have a compression calculator.....

edit i did it for you its around 11:3.1 ...importantly make sure your clearences are on </TD></TR></TABLE>

damn, i did it with the wrong gasket...ur right, its more like 11.4:1 tho

 

the rods will need to be shaved ~1mm on each side in order for the pistons to fit. Other than that they go right on. Your next option would be p30's. lower compression and they fit w/o shaving. Just depends on what compression ratio you want to run.

 

I had heard of a guy named catman who had one and he had 11:3 compresion stock internals and it was nasty..... And yes i do have a B17 tranny

 

I just wanted to be sure what all you needed to do them...

 

No I meant do you have one for sale.&gt;&gt;??
thought maybe you were using a hydro tranny instead of the cable b17.
Because I am looking for a tranny.

 

ohh sorry im using it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91IntegGS &raquo;</TD></TR><TR><TD CLASS="quote">the rods will need to be shaved ~1mm on each side in order for the pistons to fit. </TD></TR></TABLE>

now thats a contreversy...
have a shop do it but make sure that they have done it before....

cause you could end up like me that
the wrist pin slided out of placed and damaged my cylinder wall...

 

thats why I said "~" and just in case anyone was confused by what I said... you will not be doing this yourself. The machine shop will accurately measure the pistons and rods then machine off the necessary amount.....

 

ok that would be great.....

 

what kind of power increase happens with the ctr's?

 

I heard it was pretty nasty ..... You just need to get the rods shaved and shot pinged.......

 

how nasty? lol

 

I would like to know if anyone has a dyno of one done....

 

i looked on importreview with no avail..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by guywitarex &raquo;</TD></TR><TR><TD CLASS="quote">What do I need to put some ctr pistons in a B17 and what would be the compresion ratio... Would this be good or bad thing to do?</TD></TR></TABLE>


My b17 is rebuilt with Alum Forged 9:1 Pistons, but im also using a zex kit. What do you plan on doing with your engine? I'm also using my factory tranny and it works great!

 

most likely NA with his choice of pistons. i plan on using p30's in my b17 block the piston will bolt on to the conn. rods with out shaving the rod

 

I am also running the p30's

 

You can do CTR's without a problem in your B17, as I've already done it...
You do need to have a machine shop shave the small end of the rods and put the pistons and wristpins on...You don't need to shotpeen especially since your rods have already been heated up and cooled down thousands of times and are as hard as they are ever going to get...Shotpeening could actually create internal stress and weaken them since they have already seen use. However, DO invest in some ARP rod bolts, they're worth their weight in gold! Also consider getting your crank and entire rotating assembly balanced it too is an inexpensive but valuable investment... After you install the CTR's you'll see they come out of the top of the deck about 20 thousands of an inch, which seems extreme but still clears the valvetrain!
Your compression will end up being about 12.5 to 1 so also look into some fuel management (ecu chip, fuel pressure reg., etc.). I've got mine oversized .0025" with a Skunk2 stage 2 valvetrain and I love it, it's like a totally different engine! Just make sure your timing is dead on since your clearances will be MUCH tighter...Enjoy!
As far as more in depth info and dyno #'s check out the all-motor forum it's got the best info and advice for these types of questions!!!

 

your description of shot peening goes against everything that I've read on the subject. Shot peening doesn't "work harden" the metal, it simply changes the surface shape and structure to reduce "risk" areas. Can anyone confirm?