sanity check on 103 build?

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May 20, 2009 | 09:38 AM

#31

gmc

Road Warrior

Joined: May 2008

Posts: 1,802

Likes: 2

From: Salt Lake City, UT. Dushore, Pa.

Quote:

Originally Posted by Black Flag

Thanks gmc. Not bad for a Stage II kit with stock heads. I have seen SLIGHTLY better numbers from others here, but I am really happy with this build and highly recommend the guys at LVHD.

I routinely get 43mpg and-only once lol-squeezed out an amazing 48mpg. I have no delusions of challenging 'busas, but this bike delivers smooth linear throttle response, pulls like a freight train, and even after 35K miles, it always makes me smile whenever I twist the wick.

Everyone has heard of Hiro Koiso and his Bonnieville records, but Jeff Bates is a great tuner as well. Although Jeff has since moved to the new Redrock store, both of these guys really know their way around a SERT map.

Good luck with your build mikestreet. Don't give up on your bike...it looks like you have a nice build. You just need to find someone to perform a little magic on the laptop and dial it in properly. Feel free to use my dyno sheet for comparison purposes.

It looks like I need to get mine dialed in a little since we have the same set up and they say my # are what to expect here in SLC, I get around 38-40 MPG but I run fr 4000-8000 feet above sea level and a lot at 80 MPH. It's too hot to get dn to Vegas right now but maybe this fall fora tune. Thanks.

May 20, 2009 | 09:54 AM

#32

roadroids

Cruiser

Joined: Dec 2007

Posts: 127

Likes: 0

Here's the dyno on my old 103 build - the Wood 6-6 is a great cam!
I had basically the same build as yours (basic Harley 103 kit with flat tops and a PC III) but with Rinehart true duals. You should have better numbers than mine.

Attached Thumbnails

May 20, 2009 | 09:57 AM

#33

roadroids

Cruiser

Joined: Dec 2007

Posts: 127

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PS - I see that you are running 10.5 compression. That should make those cams sing - even better numbers. Totally agree that you need to find a better tuner.

May 20, 2009 | 10:02 AM

#34

Black Flag

Tourer

Joined: Jul 2007

Posts: 435

Likes: 0

From: Central Arizona

gmc, They told me I could have easily obtained 100/100 with 2-into-1 pipes, but I wanted true duals. Also, you don't need to wring out every last drop of power. My bike was actually "de-tuned" slightly to deal with heat and PING in the summer. If you do call LVHD, talk to Rudy (service writer.) He will treat you right.

Last edited by Black Flag; May 20, 2009 at 10:06 AM.

May 20, 2009 | 10:18 AM

#35

Bandit111

Tourer

Joined: Mar 2009

Posts: 363

Likes: 61

From: BC , Canada

Quote:

Originally Posted by saw*me

Ditto. Mine is 101/115 and I'm getting mid to low 40's if I stay out of the throttle. If your oil smells like gas definitely not good !

Tom

Have a 08 Ultra , 103 kit and it puts the same # as yours with the same gas numbers , o- thats is if you lay off the throttle !!! Hee, Hee

Get a better tuner !!!

101 hp/ 115 TQ

May 20, 2009 | 11:23 AM

#36

vtwinbmx

Road Warrior

Joined: Jul 2007

Posts: 1,289

Likes: 6

From: Mayfield Ohio

With that build you should be able to get at least 38-40MPG. I have a build close to yours and get get about that rinding 80+ on freeway with 4-5 cold starts per tank. Get a retune.

May 20, 2009 | 08:17 PM

#37

mikestreet

Thread Starter

Intermediate

Joined: Dec 2006

Posts: 30

Likes: 0

From: San Diego, CA

Well, it looks like my suspicions are confirmed here. There are too many dyno sheets out there with significantly better numbers. It looks as though I'm getting the same performance as a well tuned stage 2!

2 problems:

1. Anyone approached a dealer about retuning/refunds on a tune? They claim anyone can say anything on the internet and generally dismiss it as a reliable source.
2. How do I find a good tuner in San Diego?

PS- Thanks for all your responses

May 20, 2009 | 08:52 PM

#38

PhilM

Ultimate HDF Member

Joined: Feb 2006

Posts: 5,939

Likes: 3

From: TX

I agree with most of what has been said with regard to the tune in question here.

As far as the W6 being too small for a 103... BS!

One other thing that has not been questioned is, what exactly does "mild head work" mean. I have seen budget headwork flat kill a motor (worse then stock heads). Just as easy as a "good" set of heads can make a motor sing, a butchered set can destroy the performance of one.

As Carl (& others) have mentioned, get the tune right (should see 40+ mpg) so you don't hurt you motor ~ this is important.

Many think rich is better than lean... that is certainly debatable.

Good luck!

Lookup Bob @ RC Cycles. He's in Ca. somewhere and is one of the best out there.