Q-jet power piston spring
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Junior Member
Joined: Jul 1999
Posts: 63
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From: Pittsburgh, PA
Q-jet power piston spring
How do I know which one I have? There does not appear to be a color code or anything. Are these the same in pre-74 and 75-80 style Q-jets?
How many of you have swapped springs when tuning? I don't see much mention of using this part as a tuning aid with Q-jets.
Thanks!
How many of you have swapped springs when tuning? I don't see much mention of using this part as a tuning aid with Q-jets.
Thanks!
Supreme Member
Joined: Jul 1999
Posts: 18,457
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
There are a HUGE number of different ones of them.
I keep a bag of 10 on hand (they only come from Rochester that way) of a somewhat tight one, i.e. performance-oriented, for applications consisting of a good-running motor that has high vacuum. I routinely swap them. AFAIK they are the same in the original 4M models as well as the M4Ms.
I keep a bag of 10 on hand (they only come from Rochester that way) of a somewhat tight one, i.e. performance-oriented, for applications consisting of a good-running motor that has high vacuum. I routinely swap them. AFAIK they are the same in the original 4M models as well as the M4Ms.
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