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View Full Version : NEED help FAST!!! compression pistons


One_Bad_400
04-16-2007, 06:31 PM
Ok... so the last race of the season last year i threw a cam chain and messed up soem stuff... as of right now it has a Curtis Sparks pro motor in it with a 15:1 compression piston in it... well its at my engine builder right now getting put back together and my engine builder is telling me he wants to replace that piston fro a 13:1 comp. piston for reliability issues becasue he has seen the 15:1 gernade cranks and crank cases... what do ya'll think and have you hurd of the 15:1 blowing the bottom end?!?!?! need to know before the end of tonight to tell him what to do tomorrow... thanks!
czrider263
04-16-2007, 06:36 PM
Put a falicon crank that is balanced to the pistons wieght. Im running 16:1 with no problems.
One_Bad_400
04-16-2007, 06:43 PM
whats a price on one of those bad boys
czrider263
04-16-2007, 06:45 PM
Originally posted by One_Bad_400
whats a price on one of those bad boys

Piston or the crank?
One_Bad_400
04-16-2007, 06:46 PM
crank
czrider263
04-16-2007, 06:51 PM
Before you bash the price it is worth it. When they balance the crank it does a lot of good things. They balance it, polish it to make it go threw oil better, and put on an aerodynamic rod on for slicing threw the air. They also camphor (sp) the crank. Because the crank is balanced the motor runs smother, revs faster, and last longer. Since there is less vibration it has less stress on the crank Barings. They also weld the crank so it can't flex under load. You get all this for something like 800-900$. Well worth it for any high performance build. I have one in both my DRG 06 build and DRG 05 build.
One_Bad_400
04-16-2007, 06:53 PM
WOH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ya..... it might be worth it but i dont have that kind of money!!!!!!
czrider263
04-16-2007, 06:54 PM
Heres a pic of the one in my 05.
czrider263
04-16-2007, 07:04 PM
And heres the one that went into the 06. Both run so smooth and rev crazy fast.
patrickj75
04-16-2007, 08:41 PM
i know Janssen Motorsports has a similar crank for just under $500.
pro-rider46
04-17-2007, 10:56 AM
czrider do u run race gas or do you run alcohol with that 16:1
One_Bad_400
04-17-2007, 04:05 PM
Originally posted by patrickj75
i know Janssen Motorsports has a similar crank for just under $500.

ya... i've seen it but Janssen will never get another dollar from me...
czrider263
04-17-2007, 05:04 PM
Originally posted by pro-rider46
czrider do u run race gas or do you run alcohol with that 16:1

Race gas.