At 500 miles, your rings might not be completely seated yet.
> -----Original Message-----
> From: owner-datsun-roadsters@Autox.Team.Net
> [mailto:owner-datsun-roadsters@Autox.Team.Net]On Behalf Of
> JOver4X4@aol.com
> Sent: Tuesday, October 12, 2004 4:22 PM
> To: "Tom @ Datsun2000"; neffster189@adelphia.net; "Roadster Listgroup"
> Subject: RE: dyno time!
>
>
> I have been thinking about Dan's interesting question. Why did
> my car only show a few horsepower more than Tom Hoagland's A
> cammed Solex engine?
> I am driving a 6 blade plastic fan. I am not running an MSD
> ignition. My engine is very fresh, 500 miles, old Solexs and a B
> cam. (will I see more power when the bearings wear in a little? I
> don't think substantially) Does gear ratio play a role in torque
> or HP readings on the dyno? I am also running 34mm chokes to
> help midrange torque. (I think Tom is too) I did try to bump my
> timing to 25 degrees initial advance and it leaned out the
> mixture quite a bit. Even with a bump in the main jet size to
> 140 from my normal 135. I guess I could bump the timing to 25
> deg. initial advance again and try to add even more fuel, 145
> mains? I think at this altitude and less than 10:1 compression I
> could handle 25 deg. initial advance if I added fuel to
> compensate for leaning of the mixture. Any other ideas? My
> engine is .040 over, balanced with a 15 lb steel flywheel. I
> match ported all runners and am not running an air cleaner at the
> moment. I think I should be seeing more than!
> 135 corrected horsepower too. I am happy though that the car
> runs good and pulls nicely from 2700-6000 rpm. After that I
> think the 34 chokes restrict any further top end performance.
> Does anyone else have an idea to help bump my dyno readings? It
> is not that I am unhappy, but, if there is more HP to be had with
> minor tweaking I am all over it.
> Just pondering,
> John Over68 2000wycroc
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