The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Q-jets

**Zoomad75** · 03-12-2007, 10:28 AM

Get the book "rochester Carburators". In the book it breaks down what carbs were which size, what's able to be tuned or not tuned.

Personally I'd shoot for late 60's to early 70's car versions or up to late 70's trucks. Reason being is once the pollution controls were getting more strict, they started putting limiting caps or block off plugs to the idle adjustments. Even later ones had the goofy mixture control solonoid for the computer controlled q-jet.

The early ones are completely adjustable. Plus with the book you can break down the fuzzy logic to q-jet tuning with actual sizes for rod's jets and hanger. It's worth the price.

03-12-2007, 10:28 AM	#3
Zoomad75 K5Camper Join Date: Mar 2004 Location: Pueblo, CO Posts: 1,513	Re: Q-jets Get the book "rochester Carburators". In the book it breaks down what carbs were which size, what's able to be tuned or not tuned. Personally I'd shoot for late 60's to early 70's car versions or up to late 70's trucks. Reason being is once the pollution controls were getting more strict, they started putting limiting caps or block off plugs to the idle adjustments. Even later ones had the goofy mixture control solonoid for the computer controlled q-jet. The early ones are completely adjustable. Plus with the book you can break down the fuzzy logic to q-jet tuning with actual sizes for rod's jets and hanger. It's worth the price. __________________ Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper Last edited by Zoomad75; 03-12-2007 at 10:28 AM.