302 problems no low end
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Joined: Jul 2006
Posts: 8
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RE: 302 problems no low end
Here is a few pics not very clean nor have i tied up all the wiring yet.
[IMG]local://upfiles/42724/20CA3FBC42A9405DBD584A81155E2660.jpg[/IMG]
[IMG]local://upfiles/42724/6CC2EA25FEF04B3CB9FD4D7AFD0E6674.jpg[/IMG]
[IMG]local://upfiles/42724/2C41990CBA484CDD8AEBDC6DBA677B26.jpg[/IMG]
[IMG]local://upfiles/42724/20CA3FBC42A9405DBD584A81155E2660.jpg[/IMG]
[IMG]local://upfiles/42724/6CC2EA25FEF04B3CB9FD4D7AFD0E6674.jpg[/IMG]
[IMG]local://upfiles/42724/2C41990CBA484CDD8AEBDC6DBA677B26.jpg[/IMG]
5th Gear Member
Joined: Mar 2005
Posts: 3,566
From: Marquette Mi
RE: 302 problems no low end
No vacuum advance could be hurting your bottom end. Also the advance curve needs to come in relatively fast, I would say all in before 2500 rpm. it all depends on how the distributor is set up and where your timing curve is. Without knowing all of that info, it will be tough to get it running right.
People have different ideas about vacuum advance, timing, and advance curves. One size does not fit all when it comes to timing. You have to find out by trial and error as to what the engine likes because each engine is slightly different from the other million engines of the same size and type. Change the cam, heads, intake and carb and you need something very different from stock specs, but stock is a good place to start. I like to start with the fastest advance springs, and lightest secondary spring.
Get your timing right, then get the carb to work right. Its a vacuum secondary right? Changing the spring will make a big difference in how it runs. We have picked up .4 seconds in the 1/4 by timing and secondary spring changes. You are going to have to get dirty and find out what it wants.
People have different ideas about vacuum advance, timing, and advance curves. One size does not fit all when it comes to timing. You have to find out by trial and error as to what the engine likes because each engine is slightly different from the other million engines of the same size and type. Change the cam, heads, intake and carb and you need something very different from stock specs, but stock is a good place to start. I like to start with the fastest advance springs, and lightest secondary spring.
Get your timing right, then get the carb to work right. Its a vacuum secondary right? Changing the spring will make a big difference in how it runs. We have picked up .4 seconds in the 1/4 by timing and secondary spring changes. You are going to have to get dirty and find out what it wants.
5th Gear Member
Joined: Dec 2005
Posts: 2,634
From: SC
RE: 302 problems no low end
I second that, no vacuum advance is hurting you're bottom end.
ORIGINAL: THUMPIN455
No vacuum advance could be hurting your bottom end. Also the advance curve needs to come in relatively fast, I would say all in before 2500 rpm. it all depends on how the distributor is set up and where your timing curve is. Without knowing all of that info, it will be tough to get it running right.
People have different ideas about vacuum advance, timing, and advance curves. One size does not fit all when it comes to timing. You have to find out by trial and error as to what the engine likes because each engine is slightly different from the other million engines of the same size and type. Change the cam, heads, intake and carb and you need something very different from stock specs, but stock is a good place to start. I like to start with the fastest advance springs, and lightest secondary spring.
Get your timing right, then get the carb to work right. Its a vacuum secondary right? Changing the spring will make a big difference in how it runs. We have picked up .4 seconds in the 1/4 by timing and secondary spring changes. You are going to have to get dirty and find out what it wants.
No vacuum advance could be hurting your bottom end. Also the advance curve needs to come in relatively fast, I would say all in before 2500 rpm. it all depends on how the distributor is set up and where your timing curve is. Without knowing all of that info, it will be tough to get it running right.
People have different ideas about vacuum advance, timing, and advance curves. One size does not fit all when it comes to timing. You have to find out by trial and error as to what the engine likes because each engine is slightly different from the other million engines of the same size and type. Change the cam, heads, intake and carb and you need something very different from stock specs, but stock is a good place to start. I like to start with the fastest advance springs, and lightest secondary spring.
Get your timing right, then get the carb to work right. Its a vacuum secondary right? Changing the spring will make a big difference in how it runs. We have picked up .4 seconds in the 1/4 by timing and secondary spring changes. You are going to have to get dirty and find out what it wants.
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