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Motorgen - Automotive Events, Meets, Cruises and Forums (http://www.motorgen.com/forum/index.php)
-   Engines, Transimissions, Suspension, etc. (http://www.motorgen.com/forum/forumdisplay.php?f=98)
-   -   Confusing desktop dyno numbers. (http://www.motorgen.com/forum/showthread.php?t=423)

BRUTAL64 09-02-2008 09:58 AM
Quote:
Originally Posted by Vettezuki (Post 5693)
:gay:
I don't understand?:huh:

big_G 09-02-2008 11:06 AM
Quote:
Originally Posted by enkeivette (Post 5676)
Three guys, all making stupid amounts of power out of carbed V8s... talking about fuel economy. :sm_up_there:
Yes, but 8 mpg's gets old quick. I killed 3 birds with one stone. The cam swap went fine this week-end, although I couldn't degree the cam. The piston stop wouldn't work with the heads and dished pistons...:mad: Road manners are much improved, big improvement in non-boost torque and hopefully mileage improves..even a little bit would be nice. No lope to speak of...damn. BTW, I swapped out the s/c pulley to the larger 4 inch piece, and first impressions are no loss in boost or power. :thumbs_up:

enkeivette 09-02-2008 03:22 PM
Cool, couldn't you just slide the balancer on a bit and align it to 0 degrees to find TDC?

I fixed an issue this weekend too. Got rid of the rough acceleration problem that I was sure was a timing issue. Turned out to be a carb issue.

big_G 09-02-2008 06:55 PM
Quote:
Originally Posted by enkeivette (Post 5789)
Cool, couldn't you just slide the balancer on a bit and align it to 0 degrees to find TDC?

I fixed an issue this weekend too. Got rid of the rough acceleration problem that I was sure was a timing issue. Turned out to be a carb issue.
The best way to degree the cam is by finding tdc on the piston. That removes any tolerance stack in the crank, timing gears and key-ways. Now to schedule the dyno. I hope I didn't go too small on the cam.

enkeivette 09-02-2008 09:12 PM
Quote:
Originally Posted by big_G (Post 5795)
The best way to degree the cam is by finding tdc on the piston. That removes any tolerance stack in the crank, timing gears and key-ways. Now to schedule the dyno. I hope I didn't go too small on the cam.
Don't think it will make all that much difference. Probably just move the peak power down a few hundred rpm.

big_G 09-03-2008 08:43 PM
Quote:
Originally Posted by enkeivette (Post 5800)
Don't think it will make all that much difference. Probably just move the peak power down a few hundred rpm.
Yes, that's what I figured too. Down or up a few hundred.


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