98 Ultra, no engine work, CV carb with 170/42 jetting, Ness air box, V&H slipons with stock headers, EV13 cam.
I just ordered a Rinehart 2 into 1 exhaust.
How will this effect my jetting? And with this setup, would it be better to change cam to an EV27?
If you like the 13, no reason to change cams. Your jetting may need to be changed, it may not. Put the exhaust on and see how it goes. You can then experiment with different jets, maybe a 45, maybe a 180, maybe not either. An afr gauge would make it easier to diagnose.
Start with your idle mixture screw.
The EV-27 probably won't buy you much, suggest stick with the EV-13. Far as jetting, almost impossible to do over the interweb. In general, a 42 pilot is kind of small but if it's not popping on de-accel, then leave it. As Hoss stated, make changes one at a time, i.e. the exhaust, then tune it if it needs it.
-JW
Thanx y'all......
I ran that cam ,nice ran good on 87 never seemed to get hot. I had a 45 slow and 180 with a different air filter and slip on , do you have the low speed screw to adjust ? Its at back of carb it has a plug covering it you need to drill a small hole in it then put in a sheet metal screw a little bit so you can pull it out , turn it out about 2 1/2 turns you can go another half turn either way to adjust it, if you need to go out more low jet needs to go up, same thing turning it in, for high speed jet go about 65 and go wide open count to 3 then back off 1/8 on the throttle if you feel it pull you're lean . Takes a little time but not to bad good luck