Carb tuning - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gmebey · 11-18-2015, 03:19 PM

Well now that I have eliminated all low hanging fruit, per se, I’m ready for the next big challenge in the learning curve.

After cleaning up the worn-out front end, shot tranny, wrong power steering pump, worn out distributor…. I’m now working on improving engine performance. In a past post I mentioned that I have a square bore intake with a spread board carburetor (Edelbrock 1902), the intake casting numbers are 3927184.

The past owner didn’t realize this combination of carburetor and intake would force the secondaries closed. I was able to correct the secondaries from not opening by adding an adaptor.

So now when the secondaries open the power goes flat and seems to ping.

Where do I start on this challenge?

11-18-2015, 03:19 PM	#1
gmebey Registered User Join Date: May 2011 Location: Fort Collins, Colorado Posts: 95	Carb tuning Well now that I have eliminated all low hanging fruit, per se, I’m ready for the next big challenge in the learning curve. After cleaning up the worn-out front end, shot tranny, wrong power steering pump, worn out distributor…. I’m now working on improving engine performance. In a past post I mentioned that I have a square bore intake with a spread board carburetor (Edelbrock 1902), the intake casting numbers are 3927184. The past owner didn’t realize this combination of carburetor and intake would force the secondaries closed. I was able to correct the secondaries from not opening by adding an adaptor. So now when the secondaries open the power goes flat and seems to ping. Where do I start on this challenge?



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