Free boost

[BeHyper]

I just had the cam timing adjusted. Stock is 115 in lobe center. I had my cams adjusted to 112 in lobe center.

It does make a difference. Free (almost) horse power.

Highly recommended.

;-)

Francesco

[08hyper]

Originally Posted by BeHyper

I just had the cam timing adjusted. Stock is 115 in lobe center. I had my cams adjusted to 112 in lobe center.

It does make a difference. Free (almost) horse power.

Highly recommended.

;-)

Francesco

You should have dynoed before & after, just to be sure. Aloha Alex

[johnchypermotard]

Originally Posted by 08hyper

You should have dynoed before & after, just to be sure. Aloha Alex

no need ... it was a pig before ... and now it is a slightly faster pig

[BeHyper]

Originally Posted by johnchypermotard

no need ... it was a pig before ... and now it is a slightly faster pig

Johnny Minchia! At least I ride my pig...

;-)

Francesco

[BillyD]

Hmmm...

If there is truly a diiference, I wonder whether you're feeling an improvement in horsepower or torque?

Where in the RPM range do you perceive an improvement?

[dukepilot]

Retarding cam timing generally shifts the power band higher in the RPM range. Unless the timing was way off from the factory, adjusting timing in itself will only shift and not significantly increase max power.

[BeHyper]

Originally Posted by dukepilot

Retarding cam timing generally shifts the power band higher in the RPM range. Unless the timing was way off from the factory, adjusting timing in itself will only shift and not significantly increase max power.

Well, it's not really "retarding". As a matter of fact is advancing: You are measuring in lobe center.

My cams were 118 whereas stock should be 115. So they were 3° retarded.

Advancing them to 112, the engine is getting more fuel from intake valve, hence the increased performance.

@ Bill: you can feel the difference across the spectrum, low to high RPM range. It does feel like a different bike to me now.
@ Alex: I know, I should have dynoed it. Maybe this can be your next project? ;-)

Francesco

[dukepilot]

Francesco, you're right, you advanced the cams. I'm directionally impaired! More info on cam timing here... http://www.bikeboy.org/camtime2v.html

Originally Posted by BeHyper

Well, it's not really "retarding". As a matter of fact is advancing: You are measuring in lobe center.

My cams were 118 whereas stock should be 115. So they were 3° retarded.

Advancing them to 112, the engine is getting more fuel from intake valve, hence the increased performance.

@ Bill: you can feel the difference across the spectrum, low to high RPM range. It does feel like a different bike to me now.
@ Alex: I know, I should have dynoed it. Maybe this can be your next project? ;-)

Francesco

[BeHyper]

Originally Posted by dukepilot

Francesco, you're right, you advanced the cams. I'm directionally impaired! More info on cam timing here... http://www.bikeboy.org/camtime2v.html

Very interesting reading.... The Black Mystic Art of Cam Timing!

Thanks for the link!

Francesco