A little perfomance please..

1040 Views 3 Replies 4 Participants Last post by gusa39, Sep 16, 2014

mizder

Discussion Starter · Aug 17, 2014

HI All

Great forum!

Here's the crux..

2013 Harley 48
1200 5 speed
1500 miles.
Electronic fuel ignition.
2nd owner.

Previous owner put short loud pipes on it,,, manufacturer unknown. Pipes seem to be installed correctly with no blow by or loose connections. Other than that, no other add ons. Air box is stock.

Acceleration is sweet. Idling is fine. However when I get to a cruising speed, no matter what gear, and no,,, I'm not lugging it, I can hear the engine buck, hesitate, plainly not run smoothly. Going down a hill in gear without applying throttle, it does the same thing including a fair amount of backfiring. With this I think I'm running lean on an already lean bike.
So I'm thinking that with the EFI, I need a fuel pack and a better flowing air system. Am I on the right track? What's your input on fuel packs and Air intakes?

Thanks, Mark

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Tommy_Guns

· #2 · Aug 18, 2014

mizder said:
HI All

Great forum!

Here's the crux..

2013 Harley 48
1200 5 speed
1500 miles.
Electronic fuel ignition.
2nd owner.

Previous owner put short loud pipes on it,,, manufacturer unknown. Pipes seem to be installed correctly with no blow by or loose connections. Other than that, no other add ons. Air box is stock.

Acceleration is sweet. Idling is fine. However when I get to a cruising speed, no matter what gear, and no,,, I'm not lugging it, I can hear the engine buck, hesitate, plainly not run smoothly. Going down a hill in gear without applying throttle, it does the same thing including a fair amount of backfiring. With this I think I'm running lean on an already lean bike.
So I'm thinking that with the EFI, I need a fuel pack and a better flowing air system. Am I on the right track? What's your input on fuel packs and Air intakes?

Thanks, Mark

I have a '14 Forty Eight, recently installed an aftermarket A/C (Roland Sands), and the Fuelpak...still waiting for my exhaust. IMO for what it's worth as a noob, get the Fuelpak. My bike needed remapped after the intake upgrade and the fuel pack is great. I first just picked a canned map...it doesn't have those for A/C upgrade just exhaust with the assumption that you have a high flow A/C. So I picked a canned exhaust that was close enough, and rode for about 100 miles. Ran MUCH better, but then again I felt like it needed more tweaking. I just Autotuned the bike, haven't rode since. I'm going out this morning to test it out and keep improving the Autotuned map.

I think the fuelpak is well worth the cash.

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Craigmier

· #3 · Sep 16, 2014

Got a picture? If you have drag pipes with no baffles this may be the cause. Sounds like it's running rich

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gusa39

· #4 · Sep 16, 2014 (Edited)

Yes fuel pack

I've have a Japanese cruiser and now a Sporty. I have a Fuel Manager on both bikes. I have both after market exhaust and after market air kit on both bikes. The Japanese bike has a Power Commander V and the Sporty a Vance & Hines FP3 Fuel Module. I would say that the fuel module is very necessary if you're going to change the exhaust and air kit. I also recommend doing both to get the full advantage and better performance. Once installed you just re-map according to your bikes set up. The V&H FP3 Module is great, it works via bluetooth with your smartphone. Just download the map and install it wirelessly to the module, couldn't be easier and you'll see a big difference in decel pop, throttle response and gas mileage.... just my 2 cents.

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