Join Date: Sep 2012
Location: Weatherford, TX
||LinkBack||Thread Tools||Display Modes|
Looking at new cams. What are the pros and cons of compression release type cams? I know the basic idea is to save starters and possibly batteries....hype or truth?
That said...I would like to hear from someone who has them and from some wrenches who have installed them a true opinion....not just the sales propaganda.
im not willing to spend the extra money on releases (granted i have an evo and dont beleive they make them for my cam) as far as the head goes im not going to pay for the releases to be installed either
i had 200psi in my cylinder and my starter turned it over everytime with no fuss, i did however install the yuasa HD battery with more CCA over factory for my bike
i dont feel it becomes a real issue untill you go to a really large bore were the psi starts to take a toll on the starter
most dont run more then 190psi on the street simply because they are worried about knock and bad gas, you have to have you ducks in a row to run 200+psi on the road with pump gas(including jetting, ignition timing, and the ability to help cool the motor with oil cooler and colder plugs)
so i would say unless you are running a 113 big bore with high compression (and im not talking 10.5:1 because NO ONE runs 10.5:1 on the street i dont care if thats what your pistons are labeled, that doesnt matter it comes down to elevation, cam timing, rod length and stroke most people rarely see over 9.25:1 which is like 192psi
i suppose some like to tell everyone about there compression releases and play with them before they start the bike
ive got 11:1 wisecos in my bike, i was told it would never run on the street, i live in michigan and have rode to milwaukee and rode out in sturgis....no issues or knock
The OEM 110"ers that carry the 255(called the "school-bus" cam here) are between 205-207 ccp, right off the showroom floor, so you can bet your last dollar they are in DIRE need of those releases.
We have HO 80", and 89" Evo's that use releases.
Saves the battery, starter clutch, ring & spur gear, along with 18.9 lbs. of aggravation.