Has anyone ever lowered their VTEC threshold?

[AmaHatch]

I've noticed on my Ktuner that I have the option to lower the threshold at which VTEC kicks in. I believe that factory is set at 5500 which is only 1k before redline. Has anyone modified this setting before? I don't see how lowering it to say 4500 could hurt but I thought I'd ask if anyone had prior experience. Thanks.

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[AZCWTypeR]

If lowering the VTEC threshold, the fuel trim needs adjustment too.
I'm not sure about the newest cars, but older Honda's were open Loop in VTEC (O2 sensor not adjusting mixture).

 

[TypeRD]

Honest question: What are you hoping to achieve by lowering the threshold?

 

[AmaHatch]

Honest question: What are you hoping to achieve by lowering the threshold?

I was hoping to achieve an answer to my question--has anyone tried this and what were the results? Unintended consequences? Experience only, no conjecture.

 

[MrMomSir30]

?

 

[mbaapk]

Isnt the V TaK on the exhaust side on these vs the FG2 which was front end and had the huge variation in power wind up?

 

[AmaHatch]

Isnt the V TaK on the exhaust side on these vs the FG2 which was front end and had the huge variation in power wind up?

I'm not sure about that. I have the sport touring so no vtec on the exhaust side.

 

[Chilly613]

VTEC is only on the exhaust side of the 11th Gen 1.5t. Its not even noticeable when you hit VTEC like on older cars. Changing the VTEC actuation on the 1.5t might not give you the same results as it did in the past with like a K series having it on both intake and exhaust. If you're looking for more power, you're better off tuning and getting more boost.

 

[matt23fe1]

If you have a sport touring with the L15B7, you do still have VTEC on the exhaust side in the 11th gens, unlike the 10th gens.

And it doesn’t “kick in” at a set RPM like old VTEC. Wide open throttle at any RPM and large amounts of throttle at low RPM will engage the VTEC. It’s entirely to spool the turbo faster, not necessarily for increasing air flow.

 

[cryptolime]

i noticed on the stock tune VTEC was engaging when taking off in 1st gear sometimes. Just thought that was interesting because I didn't think it really activated until 5500 RPM or so.

 

[Shankmeyster]

Get a custom tune and don't start changing things if you don't know what you are doing. You can seriously screw up your motor. There are a few on/off things you can do in KTuner that won't hurt stuff but changing engine variables is not one of them.

 

[thatonedaveguy]

I was hoping to achieve an answer to my question--has anyone tried this and what were the results? Unintended consequences? Experience only, no conjecture.

This is not something you just fiddle with and see what happens. If you don't already know exactly what you are doing, you don't change this stuff. Pay a tuner or learn how to tune.

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