Ok guys,
I decided to rebuild my carb, found out that it's a Holley 4160 DP- 3310-2 is the list #. Now here's my problem? I found out you can by a kit that will turn it into a 4150 , you get all it takes, new secondary adjust metering bock and parts. since mine only adjust on the primaries and this would allow me to adjust the secondaries. Don't know the cost yet ,will find out today, prob. as much as a new carb, in which case I'll pass on it.
But if'the cost is reasonable. and i'm rebuilding the carb anyhow, should I go ahead and make a 4150 out of the 4160??????????????/
will I get any better performence out of the carb, is being able to ajust and change the secondaries an asset or not. The secondaries are mechanical and I don't use a choke . The engine is a L48 with mild cam supposedly, What are you guys opinions would it be worth it if it's cost is reasonable or is not going to make enough diff. in the carb to matter.
I need all you gurus' input , Please
Rich

 

Having replaceable jets on the secondary side will only help you if your current mixture is off and needs to be corrected. If your current carb is correctly set up and metering correct A/F on the secondary side, you have nothing to gain by making it more easily tunable. Have you verified that the carb is not metering correctly in its current state..?

 

Lars,
Thanks for the quick reply, early riser also,eh. The secondaries drip into the carb on occasion and I've lowered the float there to stop it. As I understand the 4160 secondaries have a set uo to allow the proper mixture, Not familiar with this, have to get a Holley book today to check it out, any reccomendation on which book.
Have no Idea how I would verify that it is not metering correcting. It's almost impossible to get it running right. I think it's running rich and can't seem to correct it. That's why I decided to rebuild it now myself instead of waiting til you get back to doing them.
Thanks again, I was going to get the kit today to start the rebuild and wanted to find out if the additional metering block would be worthwhile.
Rich

 

let us know

 

Rich -
Fuel dripping on the secondary side is not an issue with the metering plate system - you have a fuel level control problem going on, and this can be solved without changing the carb over to a metering block secondary system.

Secondary metering on your carb (4160 with metering plate) is controlled with the calibrated plate on the secondary side. Check the Holley spec for the correct plate size versus what is in your carb (it's stamped with the ID number). Replacement plates in different sizes are available (just like jets). Before "re-jetting" with a new plate, you need to determine whether or not you need to - you would have to do this with a secondary metering block as well before doing any jet changes. You can use an A/F meter, plug reading, or overall feel of the vehicle to determine the need for a jetting change. Obviously, a jetting change will not correct or compensate for a defective setup/running carb.

Get the carb rebuilt and correctly set up to its stock specs. Once that is done, you can determine any need for a jetting adjustment. If you have indication that the secondary side is way off on its A/F ratio (not likely), you can either install a different plate or decide to do the 4150 upgrade. But once you install a metering block, you're still going to have to determine what size jetting to run on the secondary side and which way to jet it - so you need good data before doing this.
Lars

 

Thanks Lars
I'll follow your advice and see what happens.
Rich