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View Full Version : Cranking Compression 09 RULES



53ny
01-26-2009, 07:34 PM
Cranking Compression:Effective May 15, 2008, we are changing the maximum cranking compression on a 1200cc unsealed engine to 165 lbs - tested in accordance with the current INEX Rulebook. This cranking compression closely resembles the cranking compression of a stock Yamaha 1200cc engine. If your 1200cc engine pumps more than 165lbs, it is a quick and simple fix by adjusting the cam timing on your slotted cam gear or adjusting the valve shims. Illustrations of the slotted cam gear can be found at www.600racing.com. If you need additional assistance with this procedure, please contact 600 Racing.

jmshh60
01-28-2009, 05:50 PM
that was the big stir on the yahoo site from last season...probably will not affect us much.
Joe

EDGEnterprises
01-28-2009, 06:50 PM
As stated at the meeting... They will enforce the 180lb compression rule as used in past years. Walter stated that cars without sealed motors will be subject to heavier & more strict inspection during the season. And if your car is 181lbs HOT or COLD he will take the motor from you no IF, ANDS, or BUTS about it...

53ny
01-28-2009, 07:11 PM
BRIAN,here is the 09 rule on cranking compression right from 09 rulebook,8. 1200 CRANKING COMPRESSION:

The cranking
compression of an un-sealed engine must be at or below
165 p.s.i. at anytime (hot or cold) on at least three (3)
cylinders with the ignition off and the throttle wide open
with the carburetors on the engine, and all four spark
plugs out. Ten to twelve revolutions of the engine will
determine the total compression of a cylinder. Cam timing
may be adjusted accordingly to meet the requirements of this
rule by slotting the cam sprocket gear or substituting with an
aftermarket cam gear sprocket. INEX highly recommends that
you have your engine set at 155lb. cranking compression instead of
right on the line at 165 lb. to allow for slight variations between
gauges. There is no tolerance for engines over 165 lb. and the
gauge used by the tech inspector is the “official gauge".

This is the rule right out of the INEX RULEBOOK 09..If RIVERHEAD is an INEX santioned track ,THEY should use these rules...........KEVIN 53ny:wave:

EDGEnterprises
01-28-2009, 07:28 PM
Kevin,

That same rule was in effect last year as well, and it wasn't enforced like the rule states. BUT they did enforce making sure the open motors that are still floating around WILL and SHOULD BE under 180lb cranking compression.

So why the push now? Enforce the rule fully and loose 10 cars... Same rule was there and nothing was said?? And I think you ran an open motor for the first half of the season last year didn't you??

53ny
01-28-2009, 07:55 PM
Kevin,

That same rule was in effect last year as well, and it wasn't enforced like the rule states. BUT they did enforce making sure the open motors that are still floating around WILL and SHOULD BE under 180lb cranking compression.

So why the push now? Enforce the rule fully and loose 10 cars... Same rule was there and nothing was said?? And I think you ran an open motor for the first half of the season last year didn't you??
_____Brian,rule is rule...with out rule there would be complete chaos.....Riverhead should enforce every rule of the book with no exceptions....Last year i ran with several compettitors from other tracks that were affected by this rule in may 08...They were unhappy but CONFORMED.._They lowerd there cranking comression so they woulnd be DQ from tec the following Week...__As for me, NO I DIDNT RUN AN OPEN MOTOR LAST YEAR AT ALL !!!! I HAVE TWO SEALED MOTORS.....:wave: as FOR LOOSIN TEN CARS i dont think so ,to lower the cranking compression its a simple cheap fix

fred card
01-29-2009, 07:29 PM
how about the illegal sealed motors running at the head you know who you are i can think of 2:mad: anyone can install a seal