HELP HEI questions. I failed at searching.

[Stupidquestionspro]

This. Cleans stuff up nicely.

That’s exactly what I used worked out great

 

[Stupidquestionspro]

If it backfires out of the carb, it's too far retarded (like me!). Olds like a lot of initial, so crank in 12-18⁰ with the advance unplugged. Then, shoot for 34-36 total. Plug the advance back in, and you may see as high as 45-50, which is okay as long as there's no pinging under load.

Interesting. Since the firing order is counter clockwise turning it clockwise advances it and counter retards it right?

 

[fleming442]

It's happy hour......

 

[pontiacgp]

I would check to make sure you got the plug wires on right. If it is so far advanced to fire out the carb it should be hard to turn over, especially once there is some heat in the engine

 

[olds307 and 403]

Interesting. Since the firing order is counter clockwise turning it clockwise advances it and counter retards it right?

Yes

I would check to make sure you got the plug wires on right. If it is so far advanced to fire out the carb it should be hard to turn over, especially once there is some heat in the engine

With 8 to 1, unless has about 75 degrees, it won't run bad, won't backfire and will not be hard starting. I ran into that on my stock 7.9 to 1 Olds 350. I fired it up when I changed the distributor, ran a bit shitty, high idle and hard starting. I had 52 degrees base timing, so 75 degrees with mechanical and at least 20 degrees vacuum advance.

 

[pontiacgp]

75 degrees off and it runs fine? 🤔

 

[olds307 and 403]

Believe it or not the 260 in my 88 ran best with close to 70 degrees. Of course running 91 non octane and no power up top anyways along with 7.8 to 1 and a tiny peanut cam. I guarantee his timing is very retarded and needs much more. When I tried running a sbc swirl port TBI tune on a 8.5 to 1 Olds 350, anything below 10 degrees base ran horrible. It would not even start at the factory sbc 0 setting, 2 to 5 degrees backfired badly through the throttle body. I ended up with 19 degrees base, put timing in the mid 50's part throttle. On a sbc or the sbd, timing anywhere close to that would cause high speed detonation, trust me, happened on my 77 Dodge Van.

 

[pontiacgp]

Believe it or not the 260 in my 88 ran best with close to 70 degrees. Of course running 91 non octane and no power up top anyways along with 7.8 to 1 and a tiny peanut cam. I guarantee his timing is very retarded and needs much more. When I tried running a sbc swirl port TBI tune on a 8.5 to 1 Olds 350, anything below 10 degrees base ran horrible. It would not even start at the factory sbc 0 setting, 2 to 5 degrees backfired badly through the throttle body. I ended up with 19 degrees base, put timing in the mid 50's part throttle. On a sbc or the sbd, timing anywhere close to that would cause high speed detonation, trust me, happened on my 77 Dodge Van.

how did you set the timing at 70?

 

[pontiacgp]

the reason I asked how you set up the timing is because each spark plug terminal is 45 degrees apart so to have the timing set at 70 degrees you are past #2 and close to #7 on the distributor cap

 

[Wageslave]

Believe it or not the 260 in my 88 ran best with close to 70 degrees. Of course running 91 non octane and no power up top anyways along with 7.8 to 1 and a tiny peanut cam. I guarantee his timing is very retarded and needs much more. When I tried running a sbc swirl port TBI tune on a 8.5 to 1 Olds 350, anything below 10 degrees base ran horrible. It would not even start at the factory sbc 0 setting, 2 to 5 degrees backfired badly through the throttle body. I ended up with 19 degrees base, put timing in the mid 50's part throttle. On a sbc or the sbd, timing anywhere close to that would cause high speed detonation, trust me, happened on my 77 Dodge Van.

Good God, my SBC would balk at anything past 15 degrees initial.