Not Ranked
Once again, Mr Fixit's right....
Holley sells a block with replaceable jets to replace the fixed-jet metering blokc in 4160's....when you get done, you've essentially got a 4150....replaceable jets, etc. I think the kit is about $44.95 from Summit, plus jets, of course. Jets were $4.95 a set when I ordered mine last month. I got an assortment after talking with Dennis Olthoff of Olthoff Racing....he suggested #70 primaries and #72 secondaries for my stoked 351 (392 cubes) w/ Edlebrock Victor Jr heads (2.02 intakes/1.85 exhausts), Comp Cam. Stock out of the box the carb came with #74's....primaries and secondaries. A little too rich in our opinion. Leaned out a little with the 70/72's and seems to be right for my set up. I wound up with a set of #68's, #70's, #72's and #74's...saved the #68's, and removed the #74's from the stock carb. I'm using the 30cc accelerator pump and the stock squirter jets...so far, so good.
One thing to note....the 750-HP carb does not have a choke and therefore, no choke tower to hold the choke butterfly. Because all that hardware is gone from the top of the primary side, there's a much cleaner air flow down the primary venturis. But, it's a little but of a bugger to keep going when it's cool...just gotta learn to feather the throttle a little to keep the revs up until it warms up. But, once it does, the engine runs and accelerates MUCH smoother with the 4150 series carb over my former 4160 model. No flat spots, no 'trigger' throttle....the power comes on smooth and quick, with a steady pull from idle all the way to 7K....YEEEEEE-HAAAAAAAAA! It'll jerk your fillings out...! Or, you can just ease around town on the primaries only, like you're driving a Nissan....
Yeah.....sure you can....
.....NAWT!
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Flyin_Freddie
"An opinion on everything...an expert at nothin'!"
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