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*Billla* · 01-05-2006, 02:18 AM

For a stock engine, it's hard to beat a Q-jet. Small primaries for economy around town, BIG secondaries for the occasional heavy right foot. They're also usually tuned pretty close to the right settings out of the box, and with the vac. secondaries it's kind of self-tuning.

Holleys are great performance carbs, but in my experience they take a ton of tuning to get them right on - my carb was *6 sizes rich* and *3 secondary springs light* out of the box. Additionally, people generally get ones that are just way too big - an 850 double vs. a 600 vac.

I don't agree with the observation regarding power valves, etc. - I hear about it all the time but I've never actually seen one blown.

I completely agree with the overhaul comment; there are a few tricks (accel pump, etc.) but it's pretty straightforward if you take it slow and careful.

01-05-2006, 02:18 AM	#4
Billla Account Suspended Join Date: Sep 2005 Location: Monroe, WA Posts: 3,814	Re: Carb question For a stock engine, it's hard to beat a Q-jet. Small primaries for economy around town, BIG secondaries for the occasional heavy right foot. They're also usually tuned pretty close to the right settings out of the box, and with the vac. secondaries it's kind of self-tuning. Holleys are great performance carbs, but in my experience they take a ton of tuning to get them right on - my carb was 6 sizes rich and 3 secondary springs light out of the box. Additionally, people generally get ones that are just way too big - an 850 double vs. a 600 vac. I don't agree with the observation regarding power valves, etc. - I hear about it all the time but I've never actually seen one blown. I completely agree with the overhaul comment; there are a few tricks (accel pump, etc.) but it's pretty straightforward if you take it slow and careful.