I've been out adjusting my carbs today and found that I have a problem. (97 SLT 780)
Could not get # 1 lean enough on the low side.(1/8 turn out would not cure problem)
Then it hit me!! Pop off pressure was off.
Just rebuilt carbs with kits from SBT. I installed silver springs in kit to lower pop off a bit. (book says 20-24 psi) I just pulled off carbs and found the following:
#1 1/8 turn out on low needle 15 psi pop off.
#2 7/8 turn out on low needle 17 psi pop off
#3 1 turn out on low needle 18 psi pop off
The carbs had the reverse turned springs at first. When I replaced # 1 with original spring, pop off came back up to 20 PSI.
Now the questions. Should I bump all carbs back to 20 PSI? Also, how do you make small
adjustments on pop off pressure? Later this week I will be installing Boyesen Pro Power
Reeds and a waterbox, how will this affect the need to make pop off pressure adjustments. Your help would be greatly appreciated!
Could not get # 1 lean enough on the low side.(1/8 turn out would not cure problem)
Then it hit me!! Pop off pressure was off.
Just rebuilt carbs with kits from SBT. I installed silver springs in kit to lower pop off a bit. (book says 20-24 psi) I just pulled off carbs and found the following:
#1 1/8 turn out on low needle 15 psi pop off.
#2 7/8 turn out on low needle 17 psi pop off
#3 1 turn out on low needle 18 psi pop off
The carbs had the reverse turned springs at first. When I replaced # 1 with original spring, pop off came back up to 20 PSI.
Now the questions. Should I bump all carbs back to 20 PSI? Also, how do you make small
adjustments on pop off pressure? Later this week I will be installing Boyesen Pro Power
Reeds and a waterbox, how will this affect the need to make pop off pressure adjustments. Your help would be greatly appreciated!
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