Fuel question

[Indy03BUSA]

Ok I have heard that on the Busa when you get to a certin RPM the fuel starts to lean out. I am putting on a MPS auto shift kit on today an I am wanting to know at what rpm I should set the shifter to shift at.

[Red05]

Not sure about fuel mixtures but 10,200 RPM is a pretty good shift point for me.

[pward76]

I'm not an expert, but why would it lean out as RPM's increase?

I would think that the mixture would start to richen up due to the ram air effect. More air needs more fuel.

That's what happens on my dyno sheet.....

[jjmetheny]

(pward76 @ Mar. 30 2007,10:24) I'm not an expert, but why would it lean out as RPM's increase?

I would think that the mixture would start to richen up due to the ram air effect.  More air needs more fuel.

That's what happens on my dyno sheet.....

Hi pward, I'm wondering if you could tell me where you had your bike dynoed? I wasn't aware of anyone close with a dyno but if someone has one I would like to put my bike on it once just for fun. Also let me know if you're out and about and looking for someone to go ridding with, I'll try and meet up with you some this summer. Thanks Jeff

[BusaCruise]

(jjmetheny @ Mar. 30 2007,11:42) Hi pward, I'm wondering if you could tell me where you had your bike dynoed? I wasn't aware of anyone close with a dyno ...

well...you sure didn't go to the source to find out.

using 50309 as a search point....there are at least 24 dealers of which 5 have dynos within 100 miles which are dynojet registered tuning centers....and there is likely more that just have dynos.

You Searched For:

* Zip=50309
* Within 100 mile radius of Des Moines, IA

24 Matches Found (displaying 1 to 24)

Address
Services
Tuning Link
Software
Distance
Great American Outdoors
710 E Army Post Rd
Des Moines, Iowa 50315
Telephone: 269-422-2591
Dealer No 2 miles
Moto Rider
1109 E Army Post Rd
Des Moines, Iowa 50315
Telephone: 281-487-7433
Dealer No 2 miles
House of Horsepower
2051 E Euclid Ave
Des Moines, Iowa 50317
Telephone: 717-709-9650
Dealer No 4 miles
House of Horsepower Inc
2051 E Euclid Ave
Des Moines, Iowa 50317
Telephone: 515-299-3003
Tuning Center & Dealer No 4 miles
Garvis Honda
1603 Euclid Ave
Des Moines, Iowa 50313
Telephone: 281-576-4662
Dealer No 5 miles
Radical Cycle
5125 North East 14th Street
Des Moines, Iowa 50313
Telephone: 515-243-8723
Tuning Center and Dealer No 5 miles
Struther's Brother's Kaw & Suz
5191 NW 2nd
Des Moines, Iowa 50313
Telephone: 281-807-0909
Dealer No 5 miles
American Cycle LLC
11151 NW 54th Ave
Grimes, Iowa 50111
Telephone: 717-261-9445
Dealer No 10 miles
Hawkeye Yamaha
5708 Gateway Dr
Grimes, Iowa 50111
Telephone: 269-441-7761
Dealer No 10 miles
Advantage Cycle
12873 Geneva St
Indianola, Iowa 50125
Telephone: 269-465-4133
Dealer No 17 miles
Dugan's Cycle
508 E 2nd Ave
Indianola, Iowa 50125
Telephone: 717-810-1993
Dealer No 17 miles
G.P. Motorsports
1303 E 2nd Ave
Indianola, Iowa 50125
Telephone: 281-497-7433
Dealer No 17 miles
Van Wall Group
"Hwy 141 E, PO Box 575"
Perry, Iowa 50220
Telephone: 269-657-4574
Dealer No 31 miles
Zylstra Harley-Davidson
1930 East 13th
Ames, Iowa 50010
Telephone: 515-232-6223
Tuning Center & Dealer No 32 miles
C & C Custom Cycle
130 East Lincoln
Chariton, Iowa 50049
Telephone: 641-774-7494
Tuning Center & Dealer Yes 42 miles
Southard Implement Co
"1318 West St S, Hwy 146"
Grinnell, Iowa 50112
Telephone: 641- 236-651
Dealer No 46 miles
F & J Racing
701 N 3rd Ave
Marshalltown, Iowa 50158
Telephone: 717-854-3214
Dealer No 50 miles
Conger Machine
3307 Hwy 149
Fremont, Iowa 52561
Telephone: 717-637-1150
Dealer No 66 miles
American Hardcore
18267 State Hwy 371
Brainerd, Minnesota 51401
Telephone: 218/828-3760
Dealer No 72 miles
R/J Performance
"Airport exit, Highway 63 North"
Ottumwa, Iowa 52501
Telephone: 641-684-8400
Dealer No 77 miles
Silver Eagle Harley-Davidson
4022 Sergeant Rd
Waterloo, Iowa 50701
Telephone: 319-235-6505
Tuning Center & Dealer No 87 miles
King Racing Inc
3345 University Ave.
Waterloo, Iowa 50701
Telephone: 281-295-1000
Dealer No 87 miles
Leer's Cycle Center
37 Fletcher Ave
Waterloo, Iowa 50701
Telephone: 319- 235-645
Dealer No 87 miles
Pig Pen Customs
2121 Falls Ave
Waterloo, Iowa 50701
Telephone: 319-233-6097
Dealer No 87 miles

[NightCrawler]

My fuel leans from time to time ... but only when I'm turning!

[pward76]

(jjmetheny @ Mar. 30 2007,08:42)

(pward76 @ Mar. 30 2007,10:24) I'm not an expert, but why would it lean out as RPM's increase?

I would think that the mixture would start to richen up due to the ram air effect.  More air needs more fuel.

That's what happens on my dyno sheet.....

Hi pward, I'm wondering if you could tell me where you had your bike dynoed? I wasn't aware of anyone close with a dyno but if someone has one I would like to put my bike on it once just for fun. Also let me know if you're out and about and looking for someone to go ridding with, I'll try and meet up with you some this summer. Thanks Jeff

Hi Jeff.

The guys that did mine had a trailer with the dyno in it and had towed it to bike night at Trophy's a couple of years ago. I'm not sure how much experience they had with it at the time. Their contact info is below.

Contact Tony Tice @ (515) 465-5681. Located at the Van Wall Motorsports in Perry, Iowa.

C& C Cycles have one in Chariton, and I would go to them, and I tried to, but the guy that runs the dyno would never return my (repeated) calls, and I even rode down there one day to make an appointment, but he wasn't there, and they were not interested in calling him so he could set up the appointment, so....

I am planning on going down to KC this summer to have Steve Smithers do a dyno tune for me. I just met him this week, and I was very impressed with him and his knowlege.

Radical Cycle and House of Horsepower also have them, but according to the PowerCommander / DynoJet website, these guys do not have the "tuning link software". So if you want to get a quick set of 3 dyno runs to look at HP, A/F ratio and torque, these guys would probably be ok.

But for a tuning session, I am going to Smithers.....

I'm sure we will meet up and ride this summer! I'm looking forward to it.

[DaCol.]

(NightCrawler @ Mar. 30 2007,11:04) My fuel leans from time to time ... but only when I'm turning!