Fuel Injector Scaling

Fuel Injector Scaling

Postby Jasonvictory86 » Thu Sep 12, 2019 9:44 pm

Hi!
I've got a 2009 Fit 5-Speed that I just turbo'd.

The stock tune says the injectors are 310cc but they're actually 277cc. I tuned my fuel to compensate for this but I want to step up to the RDX 410cc.

When I put in the "old" (310cc) and "new" (410cc) injector sizes, the car doesn't start. And yes, I changed the injector dead times.

When I save the tune, close, and re-open the tune it still says the same old and new sizing. Shouldn't this put the 410 into the old and new spot once the tune is re-opened?
scaling.PNG
Fuel Injector Sizing
(4.61 KiB) Not downloaded yet


Thank you!
- Jason
2009 Honda Fit Sport 5MT, KTuner v2, Zage turbo kit, T25 turbo, Revo Short Shifter, VIS Carbon Fiber Hood, Custom Rice Bowl grille emblem.
Jasonvictory86
 
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Location: Dallas, Texas

Re: Fuel Injector Scaling

Postby KTuner » Thu Sep 12, 2019 11:44 pm

Feel free to use the individual cylinder trims to offset the difference. The new and old size is not relevant other than the math for such a thing.
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Re: Fuel Injector Scaling

Postby Jasonvictory86 » Sat Sep 14, 2019 6:57 pm

KTuner wrote:Feel free to use the individual cylinder trims to offset the difference. The new and old size is not relevant other than the math for such a thing.


So if I put in the old / new values in the "injector sizing" field does it make changes to the individual cylinder trim numbers?

And if it's supposed to, do I need to save, close out of ktuner, and re-open the new tune for the values to change?

Thanks!
2009 Honda Fit Sport 5MT, KTuner v2, Zage turbo kit, T25 turbo, Revo Short Shifter, VIS Carbon Fiber Hood, Custom Rice Bowl grille emblem.
Jasonvictory86
 
Posts: 28
Joined: Tue Sep 05, 2017 4:20 pm
Location: Dallas, Texas

Re: Fuel Injector Scaling

Postby KTuner » Sun Sep 15, 2019 1:07 pm

It's a separate set of settings.
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Re: Fuel Injector Scaling

Postby Jasonvictory86 » Sun Sep 15, 2019 3:47 pm

KTuner wrote:It's a separate set of settings.


Is there a way to verify the parameters have been applied?

Right now if I change the “old” to 310 and “new” to 277, nothing changes with my air/fuel or short term fuel trims
2009 Honda Fit Sport 5MT, KTuner v2, Zage turbo kit, T25 turbo, Revo Short Shifter, VIS Carbon Fiber Hood, Custom Rice Bowl grille emblem.
Jasonvictory86
 
Posts: 28
Joined: Tue Sep 05, 2017 4:20 pm
Location: Dallas, Texas

Re: Fuel Injector Scaling

Postby KTuner » Sun Sep 15, 2019 4:11 pm

It would affect fuel pulse, but you can use the cylinder fuel trims in the same way.
KTuner
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Posts: 1917
Joined: Mon Jul 22, 2013 8:13 pm


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