45 dcoe help!

djjjr42 · 04-16-2008, 11:07 PM

+1 on the wide band comment. Also this may go without mentioning, but re-check everything connected to the carb. Vacuum leaks can cause all kinds of problems, so check your brake booster line for any cracking or excessive wear, and make sure that your connections from the carb to the manifold and the manifold to the engine are properly torqued.
What kind of manifold do you have? I know you said the carb came from RB, and if the mani did too I guess it's a 2 piece? I have a 1 piece wraparound, but there is also one from Lake Cities or something that is really short, in which basically the carb is beside the engine rather than over the top of it. Is your vacuum advance from the distributor hooked up, or do you have it open? Also (and this has nothing to do with the carb's performance) but do you have the oil lines from the OMP hooked up to the mani? I don't mean to offend if you already know that this is critical to the engine (unless you're using premix). I'd just rather be safe than sorry when giving advice!

TheDriver216 · 04-17-2008, 12:16 AM

Exhaust= Rotary engineering header/presilencer(2-1 collector) then it looks stock midpipe to a magnaflow muffler.

Omp is hooked up and running.. make a custom rod out of a 5gallon bucket handle. at full throttle the omp is all teh way open (i can see the pumping through the lines) i plan on switching to premix

Vacuum leaks.. i hooked everything up and sprayed teh shit outta it with carb cleaner and nothing happened so i feel im safe there.

Runs like hell after 4k= holy shit that pulls nicely.. only lots of popping on decel.

No Vacuum advance- im running my timing at full advance 4k rpm is where i set my timing 24L 16T.. as suggested by others.

Manifold= one piece wrap around

Guy i bought the carb from lives 30 min away so climate on carb tuning is not an issue..

Wideband is next purchase on the list.. well that and an ignition box.

Insulting my intelligence--its cool need to cover all bases.. ill pull the jets out tomarrow and see where im at.. its seems to be running super rich..

TheDriver216 · 04-17-2008, 12:33 PM

well here is what i have in there..
Air Corrector-- 175
E-tube-- F11
Fuel jet--180
Idle jet--50
Venturi-- 40mm
Acceleator pump jet-- 85 F9

After reading some stuff from Rotary shack robert on the other forum.. for a stock port i should change the e tube to an f7 and use smaller venturis..

ok what are you opinions?

oh and my exhaust backfire seems to be due to exhaust leak when i rev the engine i can seem exhaust gas/smoke come from by the header gasket..and witht his carb i seem to be getting more smoke out the exhaust then when i had the nikki on there

04-17-2008, 12:33 PM	#3
TheDriver216 Rotary Fanatic Join Date: Feb 2008 Location: Cleveland, Ohio Posts: 159 Rep Power: 18	well here is what i have in there.. Air Corrector-- 175 E-tube-- F11 Fuel jet--180 Idle jet--50 Venturi-- 40mm Acceleator pump jet-- 85 F9 After reading some stuff from Rotary shack robert on the other forum.. for a stock port i should change the e tube to an f7 and use smaller venturis.. ok what are you opinions? oh and my exhaust backfire seems to be due to exhaust leak when i rev the engine i can seem exhaust gas/smoke come from by the header gasket..and witht his carb i seem to be getting more smoke out the exhaust then when i had the nikki on there Last edited by TheDriver216; 04-17-2008 at 01:18 PM.

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04-16-2008, 11:07 PM	#1
djjjr42 Rotary Fan in Training Join Date: Feb 2008 Location: Bishopville, SC Posts: 32 Rep Power: 0	+1 on the wide band comment. Also this may go without mentioning, but re-check everything connected to the carb. Vacuum leaks can cause all kinds of problems, so check your brake booster line for any cracking or excessive wear, and make sure that your connections from the carb to the manifold and the manifold to the engine are properly torqued. What kind of manifold do you have? I know you said the carb came from RB, and if the mani did too I guess it's a 2 piece? I have a 1 piece wraparound, but there is also one from Lake Cities or something that is really short, in which basically the carb is beside the engine rather than over the top of it. Is your vacuum advance from the distributor hooked up, or do you have it open? Also (and this has nothing to do with the carb's performance) but do you have the oil lines from the OMP hooked up to the mani? I don't mean to offend if you already know that this is critical to the engine (unless you're using premix). I'd just rather be safe than sorry when giving advice!

04-17-2008, 12:16 AM	#2
TheDriver216 Rotary Fanatic Join Date: Feb 2008 Location: Cleveland, Ohio Posts: 159 Rep Power: 18	Exhaust= Rotary engineering header/presilencer(2-1 collector) then it looks stock midpipe to a magnaflow muffler. Omp is hooked up and running.. make a custom rod out of a 5gallon bucket handle. at full throttle the omp is all teh way open (i can see the pumping through the lines) i plan on switching to premix Vacuum leaks.. i hooked everything up and sprayed teh shit outta it with carb cleaner and nothing happened so i feel im safe there. Runs like hell after 4k= holy shit that pulls nicely.. only lots of popping on decel. No Vacuum advance- im running my timing at full advance 4k rpm is where i set my timing 24L 16T.. as suggested by others. Manifold= one piece wrap around Guy i bought the carb from lives 30 min away so climate on carb tuning is not an issue.. Wideband is next purchase on the list.. well that and an ignition box. Insulting my intelligence--its cool need to cover all bases.. ill pull the jets out tomarrow and see where im at.. its seems to be running super rich..