MM FI good for power? : V-Twin Forum: Harley Davidson Forums

Cadiero · 10-26-2008, 09:23 PM

I just bought a new to me 2000 Ultra Classic. The motor is 100% stock. I plan to install a 95" kit in it this winter, in fact I just bought cylinders and pistons off the classifieds section of this forum.

My last bike was a 2001 Wide glide, I had the heads done by Big Boyz, 211 cams, 95", T-header, HSR-42, etc. It made over 100hp & tq very easily. That is about what I am looking for again.

My question is this, will the MM fuel injection hold me back power wise? I can find very little data on this fuel injection any more. I would prefer to not switch to carb, and find the only reason I would do so is due to power.

I'm heading to a local swap meet this weekend, so, I would like to make a informed decision by then. I am hoping to pick up parts for my project, no matter what direction I am headed, i just need to know what parts to get. Any help would be greatly appreciated.

**rosascycle** · 10-27-2008, 10:54 AM

Your M&M fuel injection system is very good up to and around 100HP if your looking for much more that that.Switching to a carb would be a good choice for my money with a 95cuin kit stay with the M&M system. Did you know they use a M&M fuel system on the S&S powered PRO stock Buells racing in NHRA don't let anyone tell you that system won't work for you.

skyhook · 10-27-2008, 08:04 PM

doug lofgren of silverback performance (I think he's still there) in st paul, mn has gotten some great results with MM injection...very smart man and doesn't mind sharing his knowledge

Cadiero · 10-28-2008, 07:42 AM

Okay this all sounds great, thank you. Next question, I see these modified throttle body's. Do I need something like this to achieve 100-110 HP?

**rosascycle** · 10-28-2008, 09:12 AM

No throttle body needed we have hit 100HP countless amount times with stock body aslo gives nice low and mid range #s with stock throttle body.Save your money you may not win a dyno shoot out but you will have a great running bike

Cadiero · 10-29-2008, 05:39 PM

Quote:

Originally Posted by rosascycle

No throttle body needed we have hit 100HP countless amount times with stock body aslo gives nice low and mid range #s with stock throttle body.Save your money you may not win a dyno shoot out but you will have a great running bike

Thanks for the real world advise. Not out to win contests. Just want a bike that runs good. Thanks again.