Vance & Hines Fuelpak Talk. - Page 30 : V-Twin Forum: Harley Davidson Forums

ceraaa42 · 05-27-2008, 11:30 PM

Don't be afraid to put some high heat silicone on the pipe where it clamps down also. D&D recommends this in their installation destructions.

Chris

FirNaTineNJ · 05-31-2008, 07:45 AM

Hey all,

I'm having a slight problem with the motor missing on occasion. Anyone have any suggestions? It seems to happen most when I down shift, then jump on it. It has only happened a few times, but it has me concerned that maybe I F'd something up...

Thanks guys,

Chris

vtwin96 · 05-31-2008, 06:05 PM

Quote:

Originally Posted by hoosierdaddy

The fuel pack was working just fine . What I have learned are the limitations of the fuel pack . I'm not going to bash the fuel pack but had I known back when I bought it what I know now I would have gone another direction . The heat problem I originally posted about I have found is common on a lot of 07 08 Harley's and Harley says the condition is acceptable . The real cause is the lean 14.7:1 afr the bikes are run at in closed loop to meet epa standards and I don't find it acceptable so I'm going to try something different .

go to nightrider.com they have what you need to correct the lean burn, it called XiED

izzi mike · 06-01-2008, 12:58 PM

now that it's hot out....... the F/P has me running too lean i think. any ideas?

Jeffytune · 06-02-2008, 02:15 AM

Quote:

Originally Posted by FirNaTineNJ

Hey all,

I'm having a slight problem with the motor missing on occasion. Anyone have any suggestions? It seems to happen most when I down shift, then jump on it. It has only happened a few times, but it has me concerned that maybe I F'd something up...

Thanks guys,

Chris

Hi Chris.

When you downshift, do you shut the throttle all the way closed?

Is it that you downshift, decell then jump on it?

Is it like a cough, a dead bog then goes or does it buck a couple times then go?
Let me know, and i will try to help you further.

Jeffytune · 06-02-2008, 02:22 AM

Quote:

Originally Posted by izzi mike

now that it's hot out....... the F/P has me running too lean i think. any ideas?

The only way to know for sure is to have your bike run on a dyno, a standard two pull run should show if your too lean or not.

Be sure to have the tech, when he does the second passing run to hold the speed at 40 for a 10 seconds, as the fuelpak shunts the injectors on decell, if he runs it up, decells then goes (That seems to be the normal pattern for SERT tunning) it will show a lean burst right off the bat, it's just that there is a delay in reading, and the dyno's gas system is reading the decell injector shunt (No fuel).

After your get the results, e-mail them to Vance and Hines and they can used there computer to adjust if needed your fuel map.

Jeffytune · 06-02-2008, 02:46 AM

Quote:

Originally Posted by vtwin96

go to nightrider.com they have what you need to correct the lean burn, it called XiED

I really don't think that they are an answer, it may work with a stock bike, but all there doing is using a skewed oxygen sensor to fool the system lean, it only works for the time the system is in closed loop. The Harley system is only in closed look once it reaches a set temperature, and then only at Idle and when holding speed.

In decell, the system is in open loop, and the sensors have no effect on the program, same with acceleration, it still uses the ECM program.

The problem comes in once we do anything to change the volumetric efficiency of the engine.
Most modern cars use a Mass air flow sensor (MAP) to measure the air going into the engine, weight and speed, it measures in grams pre second.
Once the ECM knows how much air is going into a engine, it knows how much fuel to add to get it to run right.

MAF sensors are great things to have, but they are sensitive to oil mist and vibration, that is why Harley does not use one, it would never survive in a V-twin Harley.

This is why Harley uses a system known and a speed dencedy system. Instead of a MAF measurement, it uses the Air temp sensor, throttle position sensor and a manifold air pressure sensor to help set the fuel ration, but it also needs to know the VE of the engine, the VE table is the map program in the computer that is why we need to "adjust" to get the engine to run right once we install free flow system.
What we are really doing by installing free flow items is letting more air in and out, and that means we have increased the VE of the engine.

The Fuelpak helps all the time, warm up, idle, cruise, accelerating and decell.

That something a skewed O2 just can't do.

FirNaTineNJ · 06-02-2008, 03:51 AM

Quote:

Originally Posted by Jeffytune

Hi Chris.

When you downshift, do you shut the throttle all the way closed?

Is it that you downshift, decell then jump on it?

Is it like a cough, a dead bog then goes or does it buck a couple times then go?
Let me know, and i will try to help you further.

It's like a cough, it bogs for a second then takes off... It doesn't happen that often, only 3 or 4 times since I did all the work, which makes me think it's something I'm doing. I'm just not sure what it could be...

Thanks for the help.

Jeffytune · 06-02-2008, 01:29 PM

Quote:

Originally Posted by FirNaTineNJ

It's like a cough, it bogs for a second then takes off... It doesn't happen that often, only 3 or 4 times since I did all the work, which makes me think it's something I'm doing. I'm just not sure what it could be...

Thanks for the help.

Try to keep the throttle open just a bit on shifts and see if that helps.

FirNaTineNJ · 06-02-2008, 02:38 PM

I'll give that a shot, thanks Jeffy

simijim · 06-03-2008, 09:09 AM

I am getting ready to put on V&H duals, Stag 1 filter and FuelPak on my 2008 Deluxe. I ran it on a Dyno last week with stock parts set up so I can see difference after change over.

Is anyone running this set up on a Softail?

xandvphyle · 06-03-2008, 09:20 AM

I have except they are the SE pipes. No dyno......runs great and strong. The heat is up around 230* when I check it on the bike immediately after shutting the engine off. Checked with V&H and they said that was what I should expect.

Good investment imo. I really didn't want any more volume from the pipes altho I would probably get a little more out of the bike if I had chosen another set.

unfknblvbl89 · 06-04-2008, 07:57 PM

I installed the fuelpak on my 08 Night Train Monday afternoon. At first I was a little disappointed. To me it sounded like my pipes (V&H Big Shots Staggered) immediately took on a new sound. Upon the first start I noticed my idle was a little higher and then once I hit the road I got some "gurgling" and popping on decel <---seems to be a common trend with the fuelpak. So I rode it for another day or two like that and then finally called and spoke to Derek at V&H. He told me to drop mode 23 from 16 to 15. I did that then went back to mode 19 and did a "confirmation" roll on the throttle. Buttoned everything up and started the bike, huge difference in the sound and idle. I will know tomorrow on my ride to work if it made any difference on the "gurgling" and popping. I'm praying that it does.

Thanks to all for the info in this post. It took me almost a full day to get through it all, but it was very informative and now I will also be on the search for a dyno locally so I can get the bike and see where I really am with A:F. I'll also post up tomorrow and let everyone know how adjusting mode 23 worked out.

boatmate · 06-05-2008, 11:54 AM

I'm in Tacoma, wa. 98422. Looking for a vendor here, how am I assured that it is version 12? Thanks.

ceraaa42 · 06-05-2008, 01:39 PM

Quote:

Originally Posted by boatmate

I'm in Tacoma, wa. 98422. Looking for a vendor here, how am I assured that it is version 12? Thanks.

The best deal I found was at WWW.EASTERNPERFORMANCE.COM and they were great people to deal with. I think it was about $220 including shipping. If you call them I would think they can answer your version 12 question.

Chris