scotty230

what jets should i put in my carb. its a holley 650dp on a rb intake with a 12a with a small streetport


thanks

FB II

ohhhh nooooezzz. you need a wide band.


but start with 62/67. see how that does. ****, what's it at now???

scotty230

i thihk i have like 58 and 62 in it now
and it stumbles under 3grand

scotty230

if it boggs when i give it gas it is what running rich or lean( i would think rich) and if i stomp on it in 1st or below 4000 it bucks and sonds like its flooding and dont do **** but if i ease into it and after 4000 floor it it pulls good ,
going to rejet it toamrrow what jets do u guys think i shouldget i have read every thing for like 66-70 pri and 80s sec to 62pri 67 sec

FB II

ok, this is a common issue.. what powervalve do you have?

rmriggin

I could probably use some help in this area also. I have been running well, but rich, for some time and I decided to dive back into re-tuning my carb after I could no longer stand driving with the windows up (and neither could passenger!). I have a 600cfm 4bbl 4160 series holley with vacuum secondaries. I am running a 2.5" power valve and #60 jets (I had #64s before). After changing the jets down I went to getting my idle mix screws set just right. It will now idle rock solid after car is warmed up and throttle response is ok also. When car is cold though it will not idle unless I keep my foot into it slightly (starts up fine, just wont stay running). I know this is because of me needing to hook up my choke but I was wondering if #60 jets might still be too much? I am running a 12a with all emissions removed, stock header and straight pipe (2.25") back to a magnaflow muffler. My simptom when cold is that there is a hesistation like it is getting too much fuel. Is that common for when it is cold? Thanks.