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No, only when you open the secondaries. You do have more options on the primary pump shot on Holleys than other vacuum secondary carbs. For instance on an Edelbrock (or Carter) you have three positions of adjustment on the pump lever arm and that's all. It adjusts stroke distance and velocity...
I think anyone that tells you that having a vacuum secondary carb is the same as a mechanical secondary, hasn't driven both. It's just theory in their heads. Vacuum secondaries just suck on a performance car. No way they can match the response of a double pumper. That said I have vacuum...
Hogwash! A speaker's power handling capability has nothing to do with how much power it takes to sound good. You won't get clipping until you crank up the volume to where it sounds distorted. You can hear clipping, so the gent who's driving his speakers with an underpowered amp, and says it...
I don't know, they look okay to me. The areas that wear aren't showing grooves you see when the lifters aren't spinning. I'd be more concerned about what looks like some corrosion going on. Maybe too much zinc? The areas of the cam that don't wear are starting to look like the cast iron that it is.
That's why I usually buy from Napa. I've given up on trying to find good parts by brand anymore. Moog was definitely crap last time I did suspension work. I can tell you that even replacement parts I bought directly from BMW were Chinese junk.
This may be splitting hairs, but I believe that a longer torsion bar of the same material and diameter would have a lower spring rate. The charts show the same spring rate for different lengths.
Only time I threw a rod was street racing my 69 Cougar, 351W, stock rods. Don't know what RPM, but I didn't want to lose. Found the rod nut stripped and the cap broke, crank came around and pushed the rod through the pan. ARP bolts ever since.
Just as a related side note, many items in the car, lights, motors, etc. require a certain amount of power. Power being volts x amps, so if your voltage drops, the current draw goes up. With high current loads heating in the connector terminals goes up, and you can get to thermal runaway. The...
In my mind two alternators would be less efficient than one heavy duty alternator. More parasitic drag. The only reason I can see would be either for redundancy in case of failure, or if you can't get one with sufficient amperage.
I still have the red toolbox I got for Christmas when I was 16. 66 now. Definitely have an emotional attachment. That toolbox was the beginning of my journey.