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Offline thewind60

Free flow exhaust
« on: April 13, 2016, 03:06:20 PM »
hi all
is anyone had Stock Zfroce with Free flow exhaust only?
is it improve the performance?
how much in % its add to the motor?
do you need to change the sensors if you change the exhaust?
any recommend one?
Thx

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Offline NMKawierider

Re: Free flow exhaust
« Reply #1 on: April 13, 2016, 03:16:22 PM »
If you look in the How Tos at my exhaust mod, it made it pretty much free flowing but it was more then the EFI system could compensate for so it leaned out too far. When I added back in the spark arrester it was able to work within it's range again..just barely.. and the plugs are burning...well on the lean side of normal. It did help the power enough to be noticed. Any less restriction and it will need a programmer.
2015 Z Force 800 (53") EPS -
Custom Air Intakes | Custom Exhaust Mod | SuperATV Harness | Custom Fenders | Custom Skid/Rock Sliders | 27" GBC Grim Reapers | Seizmik Mirrors |Конструктор (Rodin's) Doors | Dr Pulley Sliders | 1.5" Wheel Spacers | BENZ Silencer (as needed) | SATV Flip Windshield W\ Rear Shield | Dual Light Bars | Diamond Plate Storage | 9.7" GPS | Bandit Springs Rear & Gen-3 Shocks Front

My Videos On YouTube

Re: Free flow exhaust
« Reply #2 on: April 13, 2016, 09:21:14 PM »
I am running a 2 Bros. exhaust. I've not checked my plugs, but it doesn't hesitate or show any other signs of being lean. The power difference is noticeable, but not a big difference. I just got my EJK today. I can't wait to see what it does.
2015 ZForce 800EX EPS
Two Bros. slip-on
Snorkels
Half windshield
30" Monster mayhems on STI HD2s
2" lift
Secondary clocked to C4
1mm Primary Shim 3.25:1 Lowest Ratio
More to come

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Offline thewind60

Re: Free flow exhaust
« Reply #3 on: April 14, 2016, 09:34:34 AM »
what is EJK?

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Offline gwingo12

2015 Zforce 800EX
Full CF Moto Windshield
UNI Air Filter
(2) 6x9 Infinity Speakers
(2) 6.5 Infinity Speakers
(2) Polk Audio Tweeters
Kenwood 4 channel amp
Kenwood Bluetooth amp

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emersonsc

Re: Free flow exhaust
« Reply #5 on: April 14, 2016, 06:25:48 PM »
The ECUs on these units run on a tight closed loop ship. Any changes done to these motors need to be closely watched. If you are running a 2 brothers with a freer flowing exhaust and not running an EJK or DynoJet expect issues sooner rather than later. These machines already run super lean as it is. Adding a free flowing exhaust plus air filter just makes it worse.

Re: Free flow exhaust
« Reply #6 on: April 14, 2016, 08:22:54 PM »
EJK stands for electronic jet kit. It's the fuel controller from Dobeck Performance. I haven't put mine on yet and I don't have any experience with fuel controllers, but the EJK is supposed to be the best.
2015 ZForce 800EX EPS
Two Bros. slip-on
Snorkels
Half windshield
30" Monster mayhems on STI HD2s
2" lift
Secondary clocked to C4
1mm Primary Shim 3.25:1 Lowest Ratio
More to come

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Offline thewind60

Re: Free flow exhaust
« Reply #7 on: April 16, 2016, 11:09:43 AM »
how many HP the EJK add?
will it improve the performance even without changing the exhaust?