My build specs: 1966 200 with 1975 250 head. Block is zeroed with 40 over, balanced. Head milled .060. All new caps, moly rings, bearings, Sealed Power dished pistons. Clay smith 264/264 110 cam. Adjustable rocker arm and hydraulic lifters. Static compression ratio 9.16:1. DGV 32/36 - Direct mount. DUI distributor Soon to be recurved). Rebuilt C4 automatic 3 speed with Transgo shift kit. Classic Inlines headers, arvinode dual exhaust. DUI distributor. Stock converter.
I have about 400 miles on the rebuild and trying to iron out all the little things. Today while doing some curve charting I pulled the plugs and checked gaps, they were gapped .035 by build shop, wear looked to be normal. I adjusted to .050 and took it for a drive.
Under moderate-heavy acceleration going uphill, at about 3/4 throttle I would hit a drastic flat spot. The motor felt like it would stall for a second, then would roar back after lifting foot of gas for a moment and reapplying. Before regapping plugs I did have a slight hesitation in acceleration at the same point, But today was drastically worse. It seems to be right about when the the progressive carburetor opens the second barrel. Other than this flat spot, the car is running really good. Under mild acceleration the flat spot is nonexistent.
I am running the mechanical fuel pump, I know this is inadequate for my set up hopefully I will have the electric installed soon(Airtex E8012S). I also understand this carb may be a little small for a healthy 200ci.
My question is would the increase in plug gap make the hesitation much worse?
Thanks in advance!
I have about 400 miles on the rebuild and trying to iron out all the little things. Today while doing some curve charting I pulled the plugs and checked gaps, they were gapped .035 by build shop, wear looked to be normal. I adjusted to .050 and took it for a drive.
Under moderate-heavy acceleration going uphill, at about 3/4 throttle I would hit a drastic flat spot. The motor felt like it would stall for a second, then would roar back after lifting foot of gas for a moment and reapplying. Before regapping plugs I did have a slight hesitation in acceleration at the same point, But today was drastically worse. It seems to be right about when the the progressive carburetor opens the second barrel. Other than this flat spot, the car is running really good. Under mild acceleration the flat spot is nonexistent.
I am running the mechanical fuel pump, I know this is inadequate for my set up hopefully I will have the electric installed soon(Airtex E8012S). I also understand this carb may be a little small for a healthy 200ci.
My question is would the increase in plug gap make the hesitation much worse?
Thanks in advance!