Only premium gas
Thread Starter
Instructor
Joined: Oct 2008
Posts: 178
Likes: 1
From: windsor ontario
Only premium gas
I have a 76 with a 70 engine, I don't know much about the engine other that what I can visibly see, performer intake , headers. My car only seems to run right on premium gas on regular it is boggy and runs on. Anybody else have this problem?
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
Many possible factors or a combination of these :
High compression ratio,
Too hot spark plugs ( incorrect heat range ),
Too low octane fuel,
Too hot engine ( coolant or carb temperature ),
Incorrect ignition timing for the application,
Carbon deposits in the combustion chamber area,...
Some of these problems can be cured or reduced, some others can't.
A good octane booster like NOS racing formula would probably cost you as much as premium gas, so it's probably not worth the money...
High compression ratio,
Too hot spark plugs ( incorrect heat range ),
Too low octane fuel,
Too hot engine ( coolant or carb temperature ),
Incorrect ignition timing for the application,
Carbon deposits in the combustion chamber area,...
Some of these problems can be cured or reduced, some others can't.
A good octane booster like NOS racing formula would probably cost you as much as premium gas, so it's probably not worth the money...
Melting Slicks
Joined: Aug 2005
Posts: 2,683
Likes: 34
From: Working on the car NY
a '70 Corvette engine is hi-compression (10.1 and over). You should be using Premium (93 octane). That is unless the engine was rebuilt to specs that would allow it to run on under 93 octane.
Thread Starter
Instructor
Joined: Oct 2008
Posts: 178
Likes: 1
From: windsor ontario
Well I will know in a bit because I only put regular gas in last fill up ( I.m cheap) to try and now it runs crap. I will know once i run it through and go back to high octane. But I tried the lower Octane once last year and same problem.
Thread Starter
Instructor
Joined: Oct 2008
Posts: 178
Likes: 1
From: windsor ontario
The engine is actually out of a 70 impala and I am sure it has been apart as it can spin the tires coming out of the hole and sqeuals the tires going into second ( it is an automatic)
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