What would the effect of these various modes be on emissions testing?
Here in NJ, they test just HC and CO at idle (although this might
change in the near future). I suspect that increased compression
would cause more NO emission, but they don't test for that. But
a more agressive cam would probably cause more HC, becuse of the greater
valve timing overlap. Does this sound right?
Thanks again,
Doug
At 01:36 PM 7/8/99 -0700, you wrote:
>Doug,
>The 1300 (mkIV) is essentially the same engine as the 1500 with a
>shorter stroke. That stroke makes it mush more able to sustain higher
>rpms than the 1500 which has better low end torque. There are piston
>sets that will get the compression ratio up to 9:1 but as long as you
>are at it, go ahead and add a mild cam and exhaust header with free flow
>exhaust system. And lose the ZS carb. I prefer twin SU's (as I have
>previously stated) but the down draft Weber is also a good choice. Stay
>away from a single side draft Weber because of manifold design
>limitations.
>
>With all that, you should have a nice performing Spit at a price of
>little more than a normal engine rebuild.
>
>Regards,
>Joe Curry
>
|