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Offline brian smith

engine bog on bottom end
« on: July 03, 2017, 05:42:28 PM »
i have a 2016 zforce 800 i have put exhaust,snorkels,27"tires on and completely removed air box and run snorkel right off throttle body the machine bogs bad at the hit of the throttle i did restrict air inlet and it helped an input would be greatly appreciated.thanks brian.

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Online NMKawierider

Re: engine bog on bottom end
« Reply #1 on: July 03, 2017, 06:06:24 PM »
When you add an exhaust that kills or reduces back pressure, you kill scavaging which makes engines loose bottom end and even bog. The only cure is to put a programer on it and tune back in some slight back pressure.
2015 Z Force 800 53/Trail EPS
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Offline REDRIDER

Re: engine bog on bottom end
« Reply #2 on: July 05, 2017, 06:52:05 AM »
yep I would agree you need a fuel programmer, and should get it tuned at a dyno to make sure you are running the air/fuel ratio correctly so you don't melt your pistons.

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Offline brian smith

Re: engine bog on bottom end
« Reply #3 on: July 05, 2017, 07:34:57 PM »
what fuel programmer do you recommend for the z8?

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Offline REDRIDER

Re: engine bog on bottom end
« Reply #4 on: July 06, 2017, 06:48:17 AM »
I don't have one, there was a post or two about people using them I don't remember what they were called but I don't thinks there's a whole lot of them out there for the zforce

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Offline willpower719

Re: engine bog on bottom end
« Reply #5 on: July 06, 2017, 08:17:29 AM »
Willpower719
2016 Zforce 800 EX
Super ATV Flip Out Windshield
Pro Armor Sound Bar
S/A Four Point Harness
Scap Doors(Crap, but FREE)
Two Brothers Exhaust
S/A Rock Sliders
Dobeck Fuel Controller
Smithfield 3" Lift Kit

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Offline brian smith

Re: engine bog on bottom end
« Reply #6 on: July 24, 2017, 12:57:39 PM »
ok i am gonna ask you guy have you ever heard of air rich fuel lean? with just snorkel on the throttle body there was no gas smell at all and i have the bog,i put the air box back in till i can purchase a dobeck fuel controller and no you can smell gas when it is idling but no bog.i ask one of the local shops with a dyno about this and he never heard of it just said that snorkels restrict air flow and my machine was rich with fuel i know he is wrong about this because when i restricted the snorkel it worked alot better.just curios to your thoughts.

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Offline chuddly

Re: engine bog on bottom end
« Reply #7 on: July 24, 2017, 01:17:55 PM »
My only thought is a sensor that is reading incorrect.  Telling the ECU the engine needs things it doesnt.
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