Carb choice
#11
Thanks for the help. I guess I am shopping for a Super E! I always knew there should be more in this thing - time to find it!
THe thing is, I was never unhappy with the flat out performance - it was always the low speed and idle that was crappy. Getting some more power will just be a bonus.
THe thing is, I was never unhappy with the flat out performance - it was always the low speed and idle that was crappy. Getting some more power will just be a bonus.
#12
Thanks for the help. I guess I am shopping for a Super E! I always knew there should be more in this thing - time to find it!
THe thing is, I was never unhappy with the flat out performance - it was always the low speed and idle that was crappy. Getting some more power will just be a bonus.
THe thing is, I was never unhappy with the flat out performance - it was always the low speed and idle that was crappy. Getting some more power will just be a bonus.
The Mikuni is going to produce a flatter curve, almost fuel injection flat; Have a crisper throttle, make more power, and get better mileage.
Buy both of them, jet, dyno tune, and ride with them both. I guarantee you will not keep the Super E. I have spent my own hard earned money on dynos and have all the a/f monitoring equipment to test my stuff on the street, so I'm speaking from personal experience. All my big twins now (except the panhead) run Mikuni HSR42's. All the Super E's went on ebay. Its a tractor carb, but they are easy to get to run "good enough", thus popular for the home wrench. But start looking at what they work like with an o2 meter, and you'll want something a bit more modern.
And there is a cruise bracket for the HSR too.
#13
mrlexus - all I read about the Mik is that they are way harder to tune - this is not the case? You are a 'local' to me - do you recommend someone around who is good at tuning? My local dyno guy at Faribault HD seems to be real good, but I am not sure he has the 'seasoning' to be great at carb tuning.
#14
#15
mrlexus - all I read about the Mik is that they are way harder to tune - this is not the case? You are a 'local' to me - do you recommend someone around who is good at tuning? My local dyno guy at Faribault HD seems to be real good, but I am not sure he has the 'seasoning' to be great at carb tuning.
There is no reason you can't tune a Mikuni on your own. Read the tuning manual, it's very detailed.
http://www.mikuni.com/pdf/hsr_tuningmanual_021003.pdf
I do the throttle tape thing, and it works great. Tune the circuits and use the dyno to get the main jet correct (highest hp WOT) What I have found about the Mikuni that I like better than the super is that you can get the part throttles dialed in much easier. Where on a super e you are changing an air bleed and intermediate jet, on the HSR you are simply raising or lowering a needle. The accelerator pumps on super e's seem to **** fuel, where as the Mikuni has a nice fine controlled squirt of gas when you twist the throttle.
I've got no dog in this fight, I don't care what anybody else runs. I have used all 3 carbs mentioned in this thread. With that said, I think the cv feels mushy and lacks throttle response. The S&s is a primitive design that isn't very tunable and usually produces a subpar fuel curve. Yes, you can modify a cv to help it with throttle response, and you can add a thunderjet kit to a super e (if you like hoses sticking off it and understand how to tune a carburetor) to get a flatter curve. Or... You can just get an HSR and have a great carb out of the box.
Your twin cam engine sounds similar to mine, I'll get you in the ballpark with the jets if you choose to go that way.
#16
Well, call me a fool for not looking closer earlier, but S&S has a cruise adapter kit listed for the Super E for $70. So that is an option I guess. So, I have read the Super E is great for wide open but not as good for cruising - any thoughts on that? Also, I really do not care so much about fuel economy a great deal, but with all my riding buddies having 6 gallon tanks, I hate to decrease my range by too much - How would the Super E do there if tuned properly?
Griz
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