de smogging a 76 vette

[Stingray01]

anyone know of what to remove/ blank off to get rid of the factory emmisions/smogging. My car has a twin s/s. exhaust, other than that is standard.

Jamie

[panic]

i have a fully modded '77...dont get clearly what you mean in your query..

[vetteheadracer]

I believe he is refering to the additional stuff GM fitted to the cars to pass the emissions testing which he now wants to remove to free up some extra horses.

[Stingray01]

Sorry I was'nt too clear on my posting, but yes I need some info. on taking off the factory emmisions on my 76 car as it should clean up the engine internals. Don't know if de-smogging will give me more horses but I'm not bothered about that. I need to know from you guys just what is involved. If it's problematic, then I'll leave it alone.

Jamie

[panic]

personally i dont know what's involved in 'cleaning' the stock engine and exhaust because i went the radical way changing engine and exhaust altogether...

what i know is that the L48 engine which was used in later C3 if i'm not wrong (and that was in my '77 anyway) was clearly soffocated by the then new anti pollution laws giving a ridiculous 185hp figure..

Edited by panic on Tuesday 5th June 10:35

[ringram]

Wow, cool, a 185bhp sports car!

Thank god those times have changed... for now at least. Though the horizon looks bleak dispite shed loads of evidence that co2 emissions have nothing to do with climate change.

[panic]

[quote=ringram]Wow, cool, a 185bhp sports car!

...with a weight of 3.600lbs is not a good figure though

[franv8]

Normally not all that difficult. Remove the cat. Remove the AIR pump (or at least run the pipework open ended out of the bottom of the car) - plug any holes. Don't think there'd be that much more complicated on that age of car. They used to get away with carbs with cats because (I believe) they used to create the 'lean' gas mix after the engine, by injecting air into the exhaust. Cat(s) can be replaced by straight bits of pipe, either fit a non cat equipped exhaust, or normally bypass pipes are available, some which just bolt into place. Or get your local exhaust man to knock some up.

Hope this helps.

[ringram]

Good high compression heads and a cam will then add to the transformation and give you a corvette that acts as it should.