Author Topic: stock conrods boost levels? (Read 4749 times)

bar73k · « **on:** February 22, 2008, 10:35:18 AM »

anybody out there who has pushed stock conrods in an m42 to breaking point?

im running 22psi and i have stock rods, im planning on pushing that upto 25psi

but im starting to worry about the rods....

i have been told they should handle 20psi, well i know for a fact they do, but how far can i keep pushing?

rob_e30 · « **Reply #1 on:** February 22, 2008, 12:25:51 PM »

We've been as high as 27 but I'm not sure I'd recommend it.

beegeezy · « **Reply #2 on:** February 22, 2008, 08:06:51 PM »

More info on your setup?!

stereomotional · « **Reply #3 on:** February 23, 2008, 01:40:03 PM »

they are cast correct? i personally wouldnt go over 15-18psi especially on stock CR (i hope you lowered it).

beegeezy · « **Reply #4 on:** February 23, 2008, 09:06:04 PM »

I thought the rods are forged on m42s, the pistons are cast iirc.

rob_e30 · « **Reply #5 on:** February 24, 2008, 09:03:47 PM »

Quote from: beegeezy;43377

More info on your setup?!

If you mean me, here is a link...

http://www.r3vlimited.com/board/showthread.php?t=96456

bar73k · « **Reply #6 on:** February 26, 2008, 04:56:51 AM »

i have lowered the compression to 8.0:1 with forged pistons...

ill dial her up to 25psi, we'll see how she holds up i guess

nuvolarossa · « **Reply #7 on:** February 26, 2008, 05:34:16 AM »

Quote from: bar73k;43614

i have lowered the compression to 8.0:1 with forged pistons...

ill dial her up to 25psi, we'll see how she holds up i guess

So you'll have stock rods with forged pistons at 25psi? What headgasket you have now?

beegeezy · « **Reply #8 on:** February 26, 2008, 09:57:11 PM »

any idea on power output at that psi? And your car is noice rob

bar73k · « **Reply #9 on:** February 27, 2008, 01:58:42 AM »

Quote from: nuvolarossa;43617

So you'll have stock rods with forged pistons at 25psi? What headgasket you have now?

heatgasket = cometic stainless steel

vatos_p · « **Reply #10 on:** March 17, 2008, 01:52:08 AM »

please give us some more info on pistons ( diameter and stuff ) and more info on gasket ( thickness )

i am planning to go to cometic gasket for pressure drop ( stock internals ) 9:1 so i can go to 0,8 - 0,9 bar press...so some more info would be good...

bar73k · « **Reply #11 on:** March 24, 2008, 03:08:20 AM »

the head gasket i believe i standard thickness, to be honest in not sure

and the pistons are custom made JE Pistons 8.0:1 comp