'68 427 side-oiler pass emissions?

[Estabandando]

I've got a '68 427 side-oiler that I'm trying to get emissions for (its not in a mustang but there really isn't a better place to ask the question on these forums). I'm in Colorado and I can't get the engine to pass the idle hydrocarbon emission limits of 1000ppm. Today I went to get a baseline and it ran ~3000ppm at idle. Its got a ton of cam in it. I recently inherited the car from my dad who used to run it on 25% alcohol to get it to pass, but that required several carb adjustments that I would prefer not to make if its unecessary. Do any of you have any suggestions? Simple octane booster (xylene) isn't enough, I've tried that.

I saw a fuel additive called "'CRC' Gauranteed to Pass". They claim they will refund double the purchase price if your car doesn't pass after using it. I'm not usually one to bite on the gimmicky products, but if it will do the trick without carb adjustments I'll try it. Anybody have any experience with this product, or a similar one?

Or any suggestions to get it to pass without fuel additives are greatly appreciated as well.

Thanks.

[BigDanTheMan]

descirbe side-oiler. i don't know what that is but it sounds interesting.

[CriticalMass]

It just differs from the center/top oiler 427 in the oiling system (of course). The top oilers oiling system caused problems in high performance applications. When there was a loss of oil pressure anywhere in the system the engines main bearings were starved of oil. The side oiler block was cast to prevent that by adding an oil gallery that ran from front to back along the left side of the block, and thus the name "side-oiler". It ensures that even if one portion of the system becomes starved, it doesn't affect the entire engine. It was cast for high performance applications...namely NASCAR, but was also put into Shelby Cobra 427s and a few other applications.

There are a few other less significant changes, like stronger cylinders, but the oiling system is the major improvement.

Center oiler 427s are relatively prevalent but the side-oliers were only cast from 1965-1966 and 1968. They are rare, coveted, and pricey.

However, as far as emissions go, its just like any other 427. I just mentioned it as a force of habit.

[dampachi]

put it in a pre-75 car and say fuck emissions.

[Estabandando]

Well, that's not an option, but it wouldn't do me any good anyway. In Colorado they test to the year of the engine, and its got to be pre-'65 to qualify for a total emissions waiver. As it is, I'm having it tested at 1965 standards, but it still won't pass in its current configuration.

[SVTcobra306]

get a DL and reg in a non-emissions testing state....