Thread: whoa 950 huh

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ok it is a 3500 stahl lunati solid roller cam 290 duration heads are canfield that have been ported, intake ported, runners are 215cc valves are 2.05, cc chamber is unknown at this time said i was told running 12.5:1 compression runs rich at idle which jets will not help this problem since the idle circuit is all on its own right? i do have lame braim idea my temp never runs consistant like it has a sticky thermostat i know that it has to be at operating temp to adjust idle screws. ima go get stat tomorrow. i still would like to get smaller carb. this may not seem logical but a new smaller main body will not fit my base plate, and smaller base plate will not fit my main body is this what ur saying? so if i got new base plate and main body would my other components such as float bowls and metering plates fit new stuff.(make sense)

Yes I believe the 4150s have a different baseplate. Never tried to mix them, so dont know about smaller. Think 800 is smallest/big. The 950 you have may have adjustable idle air bleeds also. You have enough cam and excellent heads. The idle air bleeds are the holes in the primary choketower base. If they are totally smooth they are probably fixed. Anyhow , you can use all of that carb. The pump shot and or secondary diaphram springs will wake up the launch . You will have to experiment with volume and time of pump to match how your engine gulps air when stabbed wot. I have tried to find a happy medium on the idle screws w/ eng temp. Also there is a screw on the bottom of the baseplate to adjust secondary advance which can majorly affect the idle screws and bleeds. Lastly cam intake/ ex overlap on a roller is fatter on lift ,so some raw some fuel escapes with the exhaust around bdcenter.. Hope that is all relevant .....