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I have a 750 cfm Street Demon carb on the ~450 HP 360 in my '70 Duster with a stock replacement Carter mechanical pump and stock 5/16" fuel line all the way from the tank pickup to the carb. Fuel supply seems marginal for my power level as after a second or 2 at WOT I can see my AFR slightly...

I bought a Summit brand kit of Holley carb jets for the secondaries on my Street Demon because I wanted to richen it up but something seems off. I went from the stock #86 to #88 jets and my AFR is about the same or possibly even leaner. Before that I had 54x38 metering rods and #87 jets in the...

I have a tuning issue with my 750 Street Demon where the tuning range I need can't really be had with the primary jets and metering rods available from Holley. The primary jets jump from a #82 up to #87 and after lots of messing around with both sizes and all of my metering rods (which are...

Hey all just reporting in on my experiences so far with this brand-new carb I just bought. It's the 750 cfm model ("Holley") Street Demon with the plastic bowl. I didn't even bother running it with OOTB jetting because everywhere I read people were saying they are set rich from the factory and...

I got an old 750 Mighty Demon that has no vacuum ports. I have a PCV system on my car and would like to have vacuum advance when i drive the car with this carb on it. It will still be my "extra" carb for mainly racing but i'd like the vacuum stuff if possible. Can i drill the base plate...

I found this surfing the net, looks pretty interesting... http://www.prosystemsracing.com/svseries.html Any of you guys tried it or know someone who has? The article in the link brought up a few shortcomings of conventional carburetors I hadn't really thought of before...

The new 360 Magnum I put in my '70 Duster seems to have a much bigger demand for fuel than my old worn-out 318 oddly enough... :D I think the carb bowls are running empty when I keep it floored for a while at higher RPM. Is there a way to test the fuel pump/system to make sure there isn't a...

I'm running a Carter AFB on my 360 and just have the bowl vent open to the air. I've heard that running a hose from the bowl vent to the PCV breather can save a little gas mileage by capturing the wasted fumes when the vent valve is open. I don't have a breather with hose fittings though, can...

My cousin's 1972 Polara 440 came with a Holley 4-bbl. with "LIST-6160-1" stamped on the choke tower. Not much info about them online, only that they are an OEM Chrysler carb made by Holley. I have a new 360 Magnum in my '70 Duster with a 625 cfm Carter AFB that runs OK but not great (runs a...

I have a Carter AVS carb #4640 that I'm trying to get running on an otherwise bone-stock 440 in a '72 Polara. It stumbles/bogs pretty badly when I free-rev it which I think is due to numerous vacuum leaks, but I still need new straight metering rods and possibly jets. Will the Edelbrock...

I'm trying to dial in the secondaries on my ThermoQuad but I'm afraid the jetting is just way too rich. When I open them up there's a bit of a stumble then the engine will rev to about 3500 RPM at which it starts to misfire and kind of "flutters". Would this be an over-rich condition or...

As the moment of truth draws nearer and I await my cylinder heads in the mail, I am wondering if the stock linkage for my 318 2-bbl. will work with the ThermoQuad I plan to put on my engine. Will I be able to bend or otherwise modify the stock 2-bbl. brackets to work with the engine, or will I...