I just got a used edelbrock carb for my 02 Rappy but it didn't come with any instructions and there is no plenum included, just a K&N bolted directly to the carb. Everything else is stock on my Rappy including exhaust for now. I have a couple questions for you guys with the edelbrock's. When you adjust the needle height are there an endless number of settings because when I try turning it in either direction it will click and click but it doesn't seem like it will ever stop, so how do I know where I am on the needle? I want to set the height to where it came from the factory and adjust from there, how would I do it? Next, what are some of the settings you guys are running as far as needle adjustment and how many turns out on the accelerator pump screw? Would any of you be able to e-mail me the instructions, I would greatly appreciate it?

Thanks

 

Adjustment is pretty simple, but I don't have any info for the raptor. Heres the basic guidelines to tune it, and remember to put blue threadlocker on the threads of the black piece that has the click adjustment inside it (the large piece in the center of the slide, and add only about two drips, keeping it away from the small holes towards the bottom)

Idle to 1/3 throttle (**** adjustment): Start by turning the **** all the way clockwise until it stops for the max rich setting. Slowly work your way lean by turning it counter until no smoke or backfires occur out the exhaust. To check for smoke easily just hold a white piece of paper up to the exhaust while you only slightly rev it. If you get too lean it will start making loud pops, and if you drive it around at a speed above 3rd or so, well above 1/3 throttle, and then release the throttle to under 1/3 but not completely closed it will pop also.

1/3 to full throttle (needle change): If you are rich you will definately have a lack of power, and you will see some flames or flashes pop out if its dark outside. You will also smell the excess fuel that has passed with the exhaust, and the motor will have a gargle sound. If you are lean it won't even want to reach your max rpm and it would run rough with a pingy/poppy sound.

Pump shot adjustment: You should worry about this last of all the adjustments. Turn clockwise to make more of a pump shot, counter to make less of one. You'll only want to make 1/8 turn adjustments in the process. If it is set too strong it will bog down when you slowly roll the throttle on at a higher speed (more noticeable if you are in 3rd gear and in the midrange or above in rpms). To test to see if it is too weak just run at the same speed and rpm range and just gun the throttle very quickly. If it is indeed too weak it will nearly stall right when you gun it.
If you change any gear ratios (such as run a lower sprocket in the front) it will require you to readjust the pumpshot over again. This is perhaps the most time consuming thing to adjust on the carb, so just take it slow and fine tune it to the hair. Be sure to tighten the lock nut on it afterwards pretty tight to prevent fuel from leaking out.

Float adjustment should be fine more than likely, but if you need to adjust it just give edelbrock a call and ask for the stock settings. Once it is fine tuned you will have to adjust your mixture all over again, as the float will alter the mixture.
Forgot the piece you put the threadlocker on has a small peg that has a bur to slide vertically into the slide. Only screw the peg on 3 revolutions onto it when you put it back together and then click it to all the way rich. Just take it apart slowly to see how it goes together, and you'll see what I mean. If you forget the threadlocker the whole adjuster housing will vibrate loose and make you quad just suddenly run rich as hell and release a bunch of smoke. Hopefully that covers your questions, it's really pretty simple once you learn it.

 

Do you have any idea where a good place to start would be for the pump screw?

 

It doesn't seem like it is ever gonna stop, it just keeps turning clockwise?

 

You are probably way to strong if you tried to turn that in all the way!!! Just hop on it and take it for a short ride and use the guidelines to tune it. You should only be doing 1/8 turns on it!!! I meant the mixture adjustment to start all the way rich, not the pump screw. The mixture adj is at the top! When you roll the throttle on right now it will probably bog like hell from being set way to high.

 

I opened up the top of the carb to get to where the needle is and when I unscrewed the piece that clicks and holds the needle down I only found a spring wrapped around the thredded piece that turns then the needle. Looking on the edelbrock website it looks like the spring is supposed to go around the needle and hold it up tight against the adjuster piece. Is mine set up wrong? Also I noticed that when you turn it so that it clicks nothing happens other than the clicking, the threaded part doesn't go in our out and there is nothing below it for the threads to thread into, the end of the screw just sits on top of the needle? I don't see how turning it is doing anything. Am I missing a piece? Any info would be greatly appreciated.

 

Yeah, you sure as hell are!!! There should be a small black peg that moves up and down on the screw threads that raises/lowers the needle. That piece is about as big around as the needle head, and has a small hollow cylinder that goes down the slot you can see in the carb slide. That was the piece I mentioned to thread up about 3 revolutions when you put the carb back together. You have to stop turning it so the peg will allign with the slot I just mentioned. Call up edelbrock and they will let you purchase a new one and probably give you the pictured instructions also. Since your missing that you should hold up any other tuning until its setup right. Be sure not to forget the threadlocker, and read the directions thoroughly, those small pieces are pretty fragile.

 

Thanks, at least now I know why it won't run. I am pissed, I bought it on ebay and this was never mentioned, hopefully edelbrock can help me out.

 

The edelbrock customer service is excellent, you shouldn't have a problem. You should check and see how dirty the inside of the carb is if it was shipped like that, but wait till you get the instructions, they'll tell what kinds of lubrication needs to be done to the carb slide. Lets hope this was the only problem...