[Shotimes] Valve lash done.....but car seems weaker now.

[Donald Mallinson]

Ron,

Considering the narrow range of adjustment recommendations 
on the SHO shims, wouldn't it be correct to say that while 
your explanation of gap and torque is correct, that the 
difference would be so small between minimum correct gap and 
maximum correct gap, that the torque (or lack of) would be 
VERY hard to detect on a "butt" dyno?  Maybe you could pick 
it up on a real dyno, but with the loss of power he is 
talking about, I don't think you could even come close to 
accounting for it in just doing a "towards the tight end" 
valve adjustment?

When I did my valves, I just shot for the middle, assuming 
it was the ideal from the factory, and they did a pretty 
good job.

Don Mallinson

Ron Porter wrote:
> Bruce, just go buy the numbering on the coils, and route to the correct
> cylinder. (1-3 in the rear from pass. to drivers side, 4-6 in the front),
> forgetting about the manual......in this case, the manuals are more trouble
> then they are worth.
> 
> Also, on your loss of power. A wider valve clearance is better for low and
> midrange torque, while dropping high rpm power. A tighter lash is better for
> the high-rpm power, but can lower the midrange torque. Torque on the SHOI
> motor is rather low, and the car (being rather heavy) is sensitive to
> changes. The feeling of acceleration is primarily the gross torque at a
> given rpm, so I believe that this is the issue. If you would have done a
> dyno run before & after the 60K, you would most probably see a higher peak
> HP, but probably a lower torque curve down in the rpm band.
> 
> Ron Porter
> 
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net]On Behalf Of Bruce Malachuk
> Sent: Saturday, February 22, 2003 11:23 AM
> To: SHOtimes
> Subject: Re: [Shotimes] Valve lash done.....but car seems weaker now.
> 
> 
> I used the helms manual for the plug wires, but I'm gonna check them again
> just to be sure.
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