1978.....Need some smog help!!
Thread Starter
2nd Gear
Joined: Oct 2009
Posts: 2
Likes: 0
1978.....Need some smog help!!
hey guys im looking into buying a 78 C3 with a newish 350 3 spd (i think). it is a friend of mines sitting in his drive way for about 5 years or so. in high school he put a new 350 crate motor from chevy and didnt put the smog equipment back on there.
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette.
WHAT DO I NEED??? THANKS
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette.
WHAT DO I NEED??? THANKS
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
You'll need the entire A.I.R system (air pump) which feeds air into the exhaust manifolds (headers may have to go). There is also numerous vacuum temp contols for EGR etc. Lots of parts.
Gary
Gary
Safety Car
Joined: Jun 2004
Posts: 4,371
Likes: 223
From: Beecher Illinois
Was it originally an L82 or L48 motor?
Only the L82 or California L48s had the smog pump and associated plumbing.
You might just need the exhaust manifolds back on with the preheat stove and pipe, egr valve and some vacuun hoses and fittings.
Only the L82 or California L48s had the smog pump and associated plumbing.
You might just need the exhaust manifolds back on with the preheat stove and pipe, egr valve and some vacuun hoses and fittings.
Le Mans Master
Joined: Nov 1999
Posts: 5,768
Likes: 3
From: San Diego CA
hey guys im looking into buying a 78 C3 with a newish 350 3 spd (i think). it is a friend of mines sitting in his drive way for about 5 years or so. in high school he put a new 350 crate motor from chevy and didnt put the smog equipment back on there.
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette.
WHAT DO I NEED??? THANKS
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette.
WHAT DO I NEED??? THANKS
- PCV - Positive Crankcase Ventilation
- EFE - Early Fuel Evaporation
- THERMAC - thermostatic controlled air cleaner
- EGR - Exhaust Gas recirculation
- EVAP - evaporative controls (charcoal cannister)
- Catalytic Convertor
It may or may not have
- AIR - Air Injection Reactor
Once youve identified what the car originally came equipped with you can then determine what it is you need. The EVAP and PCV system are likely still there as they are rarely removed. If the engine still has the original intake then EGR is as easy as buying the EGR valve and the temp controlled vacuum switches at the front of the intake.
The hardest stuff to replace is the AIR system if its all gone.
Thread Starter
2nd Gear
Joined: Oct 2009
Posts: 2
Likes: 0
Thanks for all the replies guys! so i havent seen the car since the day i posted my first thread. and im goin to look at it today again. i do know the intake manifold is aftermarket (no EGR inlet), the headers have no outlets/inlets of any sort.
When you pop the hood, it just has the basics: engine, alternator, p/s pump, water pump. he has receipts for the whole thing and when i look at it today ill try and post a pic of it with the VIN/engine code/and other information.
Is it even worth it to make it smog legal? the body is super straight and interior doesnt have a rip inside.. pretty much needs paint and smog stuff. thanks again.
When you pop the hood, it just has the basics: engine, alternator, p/s pump, water pump. he has receipts for the whole thing and when i look at it today ill try and post a pic of it with the VIN/engine code/and other information.
Is it even worth it to make it smog legal? the body is super straight and interior doesnt have a rip inside.. pretty much needs paint and smog stuff. thanks again.
Le Mans Master
Joined: Jul 2009
Posts: 6,647
Likes: 1
From: East Aurora N.Y.
St. Jude Donor '10
Thanks for all the replies guys! so i havent seen the car since the day i posted my first thread. and im goin to look at it today again. i do know the intake manifold is aftermarket (no EGR inlet), the headers have no outlets/inlets of any sort.
When you pop the hood, it just has the basics: engine, alternator, p/s pump, water pump. he has receipts for the whole thing and when i look at it today ill try and post a pic of it with the VIN/engine code/and other information.
Is it even worth it to make it smog legal? the body is super straight and interior doesnt have a rip inside.. pretty much needs paint and smog stuff. thanks again.
When you pop the hood, it just has the basics: engine, alternator, p/s pump, water pump. he has receipts for the whole thing and when i look at it today ill try and post a pic of it with the VIN/engine code/and other information.
Is it even worth it to make it smog legal? the body is super straight and interior doesnt have a rip inside.. pretty much needs paint and smog stuff. thanks again.
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Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
hey guys im looking into buying a 78 C3 with a newish 350 3 spd (i think). it is a friend of mines sitting in his drive way for about 5 years or so. in high school he put a new 350 crate motor from chevy and didnt put the smog equipment back on there.
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette. WHAT DO I NEED??? THANKS
what would i need to get this thing back into "smog legal" condition?? he has shorty headers on it right now with no smog hooK ups or anything. It fires up and runs no problem. If some one can help me on this, i can get the car for about2000 or tade a bucket of mine for the 'vette. WHAT DO I NEED??? THANKS
- educate yourself re the emission systems detailed above.
- Search and spend lots of dollars on many parts, most of which are no longer available.
- Install, and tune the car for a comprehensive smog system.
Or as suggested, use as a driver with headers on it.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Ask if he has any parts taken off to go w/ it & check exhaust for cat.
A lot of that stuff is cheap, used on other Chevys & some have it & don't need/want it. You should at least list the your state in profile.
A lot of that stuff is cheap, used on other Chevys & some have it & don't need/want it. You should at least list the your state in profile.
