45 dcoe help!

djjjr42 · 04-18-2008, 04:03 PM

Cool. The flat spot is caused by transitioning from the idle circuit to the main. You should be able to tune that out though. If you're sure that you're rich down low, you need smaller idle jets not bigger ones. However iirc I think my 3 sets of idles are 55,60,and 65 and you said you've got 50. Like I said without a wide band it's really pretty much a lot of trial and error. There is an old-school method of reading your spark plugs, but the procedure is like drive 60mph, immediately pull over and pull the plugs out, lol. Another tip, make sure you keep a log of the different combinations and your observations of each.
Oh yeah, I haven't seen that guide before, cool that you found it.

TheDriver216 · 04-23-2008, 04:07 PM

well a small update.. went and put in a 60f9 idle jet seemd to work great.. the 50 i had in there wasnt marked with an f number and looked twice the size of the 60f9... put in a smaller main jet to lean it out all the way through (went from 180 to a 175) and it made a hell of alot difference it seems to be a lil more ballsy i can chirp 2nd again lol so i think it was too rich... drove it hard down the freeway and came home checked the plugs and they are a nice mocha color.. not gonna mess with the air correctors till i get a wideband.. all in all im happy with what i did... i havnt change my venturies from the 40's to the 38's yet.. i do want a lil more down low but it seems like a pain to change them and i didnt have time today.. from 2.5-4k rpm its a lil weak but after that it screams.. and there is a tad less back firing i still have a small exhaust leak at teh header to block tightened it down and got rid of some of it ( time for a new gasket)

and while i was at it checked my compression and both rotors had a nice 100-115 3 even pulses.. woot woot plenty of life left at 116k mile

04-18-2008, 04:03 PM	#1
djjjr42 Rotary Fan in Training Join Date: Feb 2008 Location: Bishopville, SC Posts: 32 Rep Power: 0	Cool. The flat spot is caused by transitioning from the idle circuit to the main. You should be able to tune that out though. If you're sure that you're rich down low, you need smaller idle jets not bigger ones. However iirc I think my 3 sets of idles are 55,60,and 65 and you said you've got 50. Like I said without a wide band it's really pretty much a lot of trial and error. There is an old-school method of reading your spark plugs, but the procedure is like drive 60mph, immediately pull over and pull the plugs out, lol. Another tip, make sure you keep a log of the different combinations and your observations of each. Oh yeah, I haven't seen that guide before, cool that you found it. Last edited by djjjr42; 04-18-2008 at 04:06 PM.

04-23-2008, 04:07 PM	#2
TheDriver216 Rotary Fanatic Join Date: Feb 2008 Location: Cleveland, Ohio Posts: 159 Rep Power: 18	well a small update.. went and put in a 60f9 idle jet seemd to work great.. the 50 i had in there wasnt marked with an f number and looked twice the size of the 60f9... put in a smaller main jet to lean it out all the way through (went from 180 to a 175) and it made a hell of alot difference it seems to be a lil more ballsy i can chirp 2nd again lol so i think it was too rich... drove it hard down the freeway and came home checked the plugs and they are a nice mocha color.. not gonna mess with the air correctors till i get a wideband.. all in all im happy with what i did... i havnt change my venturies from the 40's to the 38's yet.. i do want a lil more down low but it seems like a pain to change them and i didnt have time today.. from 2.5-4k rpm its a lil weak but after that it screams.. and there is a tad less back firing i still have a small exhaust leak at teh header to block tightened it down and got rid of some of it ( time for a new gasket) and while i was at it checked my compression and both rotors had a nice 100-115 3 even pulses.. woot woot plenty of life left at 116k mile