Holley idle help
 

The other night I was trying to set my timing on my '82, and was having all sorts of problems. I started another thread about that, and got my answer from trochoid (thanks by the way). Now my question is for all the people on here running the RB Holley 465. Could you tell me where the idle adjustment screw is (a picture is worth a thousand words). Right now my car is idling at 2k. PO told me that it is a BP. I'm trying to get my idle down to about 1k so I can set the timing to the factory settings to see if that clears up my starting issues. Thanks.

Jim

I adjust the idle on my holley by useing my foot to lift up on the gas pedal.

thanks alot......i hope you're being sarcastic ::rofl:: i'm looking for where on the actual carb you change the idle speed

I don't know if this will help but I have 600 holley on my car and the idle adjustment screw is right buy the throttle return spring and linkage facing the firewall of the car.

unfortunatley, I do not have a picture that is detailed enough to show the exact screw.

Good luck and I am sure someone will post some pics up for ya

thanks for that info. I'll check it out tomorrow (work 'til 4, get to campus 5:15, class 6-9, study 'til midnight). I may be heading to GR this weekend for some help getting it all fixed, and then doing an auto-x. I'll keep on checking for pictures.

summer classes??

Actually no, at the present moment that's how I adjust my idle. :lol:


All the adjustment on a RB holley are in the same locations an any plain 'ol holley 4160.

You should be able to "google up" any info you need to tune it.

Good luck,

--Alex

You can see it really easily by standing on the Passenger side of the engine bay with the carb hat off. It is on the left side of the carb, by the throttle linkage looking right at you at an angle. You should be able to move it with your finger without the need for a screw driver. I'll take a pic at home today if you can't find it.

does it have a colored spring on it? like red or something like that? I think i've seen it before and couldn't figure out what it is. Do I turn it CCW or CW?

ccw to lower the idle and cw to raise the idle if I am not mistaken

that should be it. just turn it and see if it idles up or down and adjust accordingly. thats how i set mine, and it works great. i think, but dont quote me on this, that if you turn it clockwise it will lower the idle..... i think.

bp12a is correct with the directions on raising/ lowering idle using that screw. there are a few tricks to these carbs getting the idle right. you have your idle fuel screws on each side of the primary bowl as well. on a rotary often adding fuel will help with a more steady idle and easier starts. on a wideband the optimum idle afr's are around 12.5:1 flat. if you are too lean it will be hard to start sometimes and will idle sorta junky. also, if your are around 2k rpms and you just suddenly drop it to around 1k or less then you may be forced to mess with the idle screws on the bowl that i mentioned due to the drop in rpms changing your afr's.

let me know if you need me to be more clear on this.

Alright so just installing my 465 today ... i can tell you that there's actually 2 of them ... there's the obvious one that everyone is talking about (I will try to post pics tomorrow) then theres another one on the other side if you look when you accelerate ... there's a link that goes from there to a tille 1/4 circle thing, on the other side of that you will see its held with a + screw, if you look closer on the little tab ... there's a screw end at the bottom of it, its a small flat head, you should be able to unscrew it more to let it down is the other one is all the way down

yes, summer classes :( calc 2 and the philosophy of ethics. I'm also working an internship and at lowe's on the weekends. Not enough time for everything :(

set the idle
 

i recently installed the hollry carb myself, the idle adjustment screw is on the throttle linkage towards the passenger side of the vehicle, the mixture adjustment screws are on the sides of the primary float bowls. I was unable to get mine to idle under 15oo rpms for quite a while, though i did find a solution to my problem. Your RB carb setup came with a copper tube that you were supposed to wrap around your header to operate the choke. If you feel the end of this tube you will notice it pulls quite a bit of vacuum. Take a pair of side cutters and crimp the end of the tube to eliminate the massive vacuum leak, however without some vacuum your choke will never turn off. To solve that problem i took a drill and a 2 mm drill bit and drilled a small hole in the copper tube. One hole was enough to make my choke work correctly though your car might require more, just remeber you can always drill more holes in the copper tube but you cant fill them in. I also installed dual MSD 6as to help with the idle and the additional fuel you can push with the new carb.

this tube you mention is called a heat riser, and wow i didnt even know there was vacuum coming from there, i am so going to have to crimp and and see if it helps my idle. ive never been able to get down below 1000 so this very well be the prob. thanks!

there isnt supposed to be much vacuum but it has to pull some for the fast iddle to function properly, i actually called the guys at RB to ask for there ideas on what was causing my idle problem and they told me to check for vacuum leaks . That was the only one i found, just make sure you drill at least one hole in the heat riser or you will get stuck in fast idle