NEED Your thought's on carb vs EFI
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Tourer
Joined: Jan 2008
Posts: 278
Likes: 5
From: Glenmora,La
Yea carbs,that used to be a big topic on this board. whether or not to ditch, your CV,and go to a mikuini.I've been inside of my cv so many time's,that I can put it together faster then my .45.Actually had a machinist make a emulsion tube for my cv,and it's still running on my bike.Whenever I got the 1550 kit put on my bike,was told to go to 44mm cv that I would need the fuel.A board member told me that was a ripoff,and he was right,the 42 was fine,and he saved me 390.00 on that carb.There's a wealth of info here that's for sure,just have to find the people,that know,that's why I brought up the topic,I trust the people here.
Grand HDF Member
Joined: May 2008
Posts: 4,585
Likes: 673
From: Rolla
There are thousands of these bikes on the road doing just that without any issues.
Outstanding HDF Member
Joined: Jan 2010
Posts: 2,916
Likes: 31
From: earth
If you had a carburator that could be perfectly tuned from Idle to redline, and self adjusted to maintain that perfect tune through everchanging operating conditions and atmospheric conditions, thats EFI. Its just a precise digital carburator. Technology good.
Road Warrior
Joined: Mar 2007
Posts: 1,396
Likes: 146
From:
For years the guys I rode with found that carbed bikes would out run F.I. bikes. Now that's not always the case. Why? Well F.I. is getting better but still way more expensive to get right. It used to be that a really good tuner was hard to find. They are becoming more common now. There are also more parts available now like bigger throttle bodies and better fuel management systems.
I have one of each. My F.I. bike has been dynoed twice, once for the big bore and engine mods, then again after i changed to a better exhaust (Fat Cat). My carbed bike has a 45 Mikuni, a lot of motor work, and has never been on a dyno. It starts instantly, runs great, and has been trouble free. In theory F.I. can be set more closely than a carb which is just a controlled gas leak. In reality getting your F.I. set really well is hard, especially if you don't live in a large urban area, or know a really good tuner. There are canned maps, but they are just a generic solution and not perfect since every motor is a little different. The self tune modules work fine, but are expensive and still don't get things perfect. A carb will never be perfect, but can get pretty close and are easy and cheap to rejet, if you know what you're doing. They also are pretty trouble free, and easily repaired on the road. Trouble with a sensor on your F.I. not so easily diagnosed and repaired. A lot more F.I. bike get towed than carbed bikes. So pick your poison!
Oh, and make no mistake, Harley's Delphi F.I. is far from "state of the art." There's a lot of room for improvement.
I have one of each. My F.I. bike has been dynoed twice, once for the big bore and engine mods, then again after i changed to a better exhaust (Fat Cat). My carbed bike has a 45 Mikuni, a lot of motor work, and has never been on a dyno. It starts instantly, runs great, and has been trouble free. In theory F.I. can be set more closely than a carb which is just a controlled gas leak. In reality getting your F.I. set really well is hard, especially if you don't live in a large urban area, or know a really good tuner. There are canned maps, but they are just a generic solution and not perfect since every motor is a little different. The self tune modules work fine, but are expensive and still don't get things perfect. A carb will never be perfect, but can get pretty close and are easy and cheap to rejet, if you know what you're doing. They also are pretty trouble free, and easily repaired on the road. Trouble with a sensor on your F.I. not so easily diagnosed and repaired. A lot more F.I. bike get towed than carbed bikes. So pick your poison!
Oh, and make no mistake, Harley's Delphi F.I. is far from "state of the art." There's a lot of room for improvement.
Last edited by Northside; May 15, 2011 at 10:13 PM.
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