removing electronic crap

[GeneHer]

Originally Posted by silicon212

Nice. I understand the 'lean drop' method of adjusting the thing. The problem is, with an engine with 'illegal' parts in it (not the cam, but the pistons and other things) the lean-drop method gets it running really good, but HC and CO aren't where they need to be.

I lack sufficient experience to comment on this point. However it makes sense, there are many variables in engines.

Originally Posted by Silicon212

I don't want you to think that I'm some sort of newbie at this - I started rebuilding engines in some capacity back in '79 so I've been around a while at this

Cool.

Originally Posted by silicon212

The standard for emission testing in Arizona is 1975 and newer - a trip on the chassis dyno and it must pass at idle and a specific RPM under load and no load (the cruise test). 1981 and newer cars get the IM147 test.

That's a lot tougher than PA. We're only doing Dyno runs (which I'm told measures NOx) in very limited urban areas.

OBDII cars are interrogated by computer. It's pretty neat unless the machine has an upset, then you either have to drive it clear or get the dealer to clear it. Either way you're out some money.

Originally Posted by silicon212

Also, keep in mind that the lean drop method adjusts the engine for idle characteristics - it doesn't do a thing for the mixture when the idle circuit is out - this is handled by the jetting.

Which would explain why my 1977 used to pass emissions checks, since in PA they were only checking the idle emissions. As of last year there are no emissions checks done on pre-1980 cars.

Gene

[96capricemgr]

Originally Posted by Blue Bowtie

Good run, Dwayne.

"4250 lbs?" Perhaps it's time to do something about that spare tire, and maybe the one in the trunk, too. With a little under ¼ tank of fuel and "junk outta the trunk" I scale in at 4,180. I'm currently slower, too, (lost some ET, trans issue I think) so don't go by what I'm doing.

I can't run it that low the pickup goes dry. The only weight I am currently looking to drop is getting some drag wheels for the back the current 2wd Suburban rims are HEAVY want to say 27-29lbs, I can find other steelies at 18lbs not to even get into how little something like a Weld would weigh. Easy tenth there maybe more. AFR is a tad rich yet too and it is pulling 2+inches at the topend, definetely more in her .

You obviously know me what other name might I know you by.

Oh and as far as the spare tire I could stand to lose about 20lbs myself, what the activity of working on the car burns off the greasy track food puts back on though .