jet selection with forcewinder spike and S&S super G shorty

[Big Dog Tommy]

Hello together,
here is thomas from germany and i have the following question.
My big dog has a 117 cube motor with an S&S super G carburator.
normaly i read here that there is a 0295 and a 074 mean jet inside.
And i want to know, whats jets i have to use with a forcewinder spyke.

Thank you for your help.

Thomas

 

[SCC007]

What exhaust do you have and baffles or not?

.295 intermediate and 074 main will probably get it running and then you can tune from there...likely you will need a .32 intermediate and probably a 76 or 78 main

 

[Big Dog Tommy]

Hello,
i have a BSL-exhaust legal , and no baffles.

 

[SCC007]

If it didn't come with any I would get a selection of jets and make sure you have the above...G is pretty easy to drop the bowl and see what you got, if it was running well before and all you did was add an intake you are going to be pretty close and then just get a jet on either side (bigger and smaller) for both intermediate and main. Depending on what you are changing you may be with in range of adjustment too...just play with it. While you are at it make sure the bowl vent plug is removed. Or the new cleaner isn't blocking vent howl.
Everybody has their own thing but I will say that the spike filter doesn't flow very well (had one on my last Iron Horse) and the big radius without baffles aren't helping things. There is some good information on here for some baffles if you look. I went with these on a couple different builds and currently run them on my Mastiff: https://bigcitythunder.com/
You need some backpressure and without it being a 2 into one exhaust, baffles will help far more then they hurt. I think they clean up the sound too (sounds better in my opinion) but still plenty loud.