Big Block (COPO) Carburetor return spring
 

I have purchased a few of these springs. They're weak and won't put it back to idle. I've shortened them and still have the same problem. I can't imagine others haven't experienced the same issue. Any suggestions would be greatly appreciated.

Along for the ride, I have the same issue with this spring.

Least I know I'm not alone. Thx for the reply.

I also am looking for a stronger spring.

I experienced the same issue. What options are out there?

How about this one??

https://www.ss396.com/chevelle/ACS-0069.html

That should be a lot better. A lot more springs

I would have thought that a 427 would have had 2 springs on the carb … I guess it probably didn’t matter much because in Nhra & most drag racing have a rule 2 return springs on the carb …

That will work, but that spring is for a 68 model year, 302 Z28, 396/427 GM#3923501.

I ended up extending the two springs and interlaced them together. That arrangement worked.