carb tuning. need some skoolin

[bk_cauley]

ok guys ive never messed with carbs. How hard is it to learn to adjust and tune them. ive got the basics down (using a simple ass eddy 1407) but would like to learn more on tuning them. i.e. swapping jets,needles and power valves in holleys. can anyone give me some good advice or point me in the right direction. thanks

[4348rd]

you need one tool for that carb

BFH

[NotoriousGreaseMonkey]

Take it apart and put it together.. Thats the way I learned..
Small jets in the front big jets in the back..lol

[bk_cauley]

i know this carb sucks but its reliable. im looking into other carbs but want to learn how to set them up and tune them before i go making any decisions on which one to get. the one thats on my truck now has given me no trouble and has yeilded pretty decent mileage. im deff gonna keep it as a back up but want to learn what carbs are good for what reasons.

like what carbs are good for making power and why they are. what jets/rods to use for what applications and so forth.

another example im curious of whats the physical difference in a blow through carb and a normal one. im green to all this carb stuff and really want to get into it.

[SS2win]

edelbrock has a tuning manual on their web site. If you want to get rid of that piece of junk and a really good carb then I suggest a quadrajet for which there is a lot of information on tuning here: http://www.florida4x4.com/tech/quadrajet

[bk_cauley]

whats the advantage disadvantage of a mechanical secondary and a vacuum secondary? i wont something that will make good pwer but also be good for the street.

[D]

whats the advantage disadvantage of a mechanical secondary and a vacuum secondary? i wont something that will make good pwer but also be good for the street.

If you don't have vacume issues(too big cam), the vacume secondary would be better for the street

[cefolar]

ok guys ive never messed with carbs. How hard is it to learn to adjust and tune them. ive got the basics down (using a simple ass eddy 1407) but would like to learn more on tuning them. i.e. swapping jets,needles and power valves in holleys. can anyone give me some good advice or point me in the right direction. thanks

Study up on "reading" spark plugs and then go from there. There is not a lot to any carb. - adjust the float bowls, set the idle mixture and everything else you can read from the plugs and driving.

Pretty common sense stuff - pick up a good tuning book, there are plenty out there to get you started. If you come by my house anytime, I'll show you how I tune them.

[gsdave]

Carbs are great if you spend a little time tuning them. Vacuum secondaries are best for the street as "D" said above. Holleys are easy to tune and have been reliable for me. If you're not good at reading plugs, you can use a wideband 02 sensor to tune as well. Its funny that 20 years ago, everyone was afraid of tuning EFI and now it seems like everyone is afraid of carbs. :)

[spadoc79]

i know this carb sucks but its reliable. im looking into other carbs but want to learn how to set them up and tune them before i go making any decisions on which one to get. the one thats on my truck now has given me no trouble and has yeilded pretty decent mileage. im deff gonna keep it as a back up but want to learn what carbs are good for what reasons.

like what carbs are good for making power and why they are. what jets/rods to use for what applications and so forth.

another example im curious of whats the physical difference in a blow through carb and a normal one. im green to all this carb stuff and really want to get into it.

i went from a holley 650 to a barry grant spped demon 650 on my old stang and i loved it. it was a vacuum sec. and it worked well with me e cam. the bg carb comes with a video showing how to tune the carb.