Si How to tell which MAF you have on your PRL intake (Street or Race)

[Civic_Si_Yes]

I currently have a PRL short ram intake on my 18 Si that I bought locally from another enthusiast.

firs well and works great but how do I tell which MAF it has, street or race?

i know the race mafs require a tune (which I already had, ktuner) so Im unable to tell the difference whether it’s a race or street.
Is there a simple way to tell the difference?

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[hobby-man]

You could ask PRL for the measurements and check it yourself. Or ask the person you bought it from if you can still contact them.

Another option would be to see if your fuel trims are completely f'd lol. The race MAF would go haywire on a street MAF calibration.

 

[Civic_Si_Yes]

You could ask PRL for the measurements and check it yourself. Or ask the person you bought it from if you can still contact them.

Another option would be to see if your fuel trims are completely f'd lol. The race MAF would go haywire on a street MAF calibration.

I don’t have contact with the seller anymore. This was 6+ months ago. However I’ve been running this for 6 months and I don’t think it’s been an issue. How can I measure my fuel tri a wirh my KTuner? I’m running a TSP Stg 1 tune as well

 

[hobby-man]

Check your STFT1 and LTFT1 parameters on the display.

What should your fuel trims be on your 10th gen Honda? Generally speaking STFT should float in the +/-5% with a stretch to 9-10% being ok depending on driving conditions. You can expect max positive and or negative values under certain instances like flooring the pedal and heavy throttle lift off for example. For your LTFT you should be about half that with 0 being the sweet spot and +/- 3% still being acceptable. Once your STFT starts to get above +/- 15% or your LTFT +/- 10% it might be time to start looking for a problem like one of those listed above.

https://www.27won.com/blog/yeah-but-what-are-your-fuel-trims

 

[PRL Motorsports]

They are labelled around the sensor bore.
"Si R" would be Si Race
"Si" would be Si Street
"EX R" is non-Si Race
"EX" is Non-Si Street.

If you are in question or for some reason the housing is not labelled, please send us a picture measuring the diameter and of the sensor bore. We will be able to tell you which it is

 

[Civic_Si_Yes]

Here are photos of mine.
not sure if you can tell without removing the MAF.

 

[Civic_Si_Yes]

Check your STFT1 and LTFT1 parameters on the display.

What should your fuel trims be on your 10th gen Honda? Generally speaking STFT should float in the +/-5% with a stretch to 9-10% being ok depending on driving conditions. You can expect max positive and or negative values under certain instances like flooring the pedal and heavy throttle lift off for example. For your LTFT you should be about half that with 0 being the sweet spot and +/- 3% still being acceptable. Once your STFT starts to get above +/- 15% or your LTFT +/- 10% it might be time to start looking for a problem like one of those listed above.

https://www.27won.com/blog/yeah-but-what-are-your-fuel-trims

Wow, thank you for the information. I learned so much just by reading their blog post. Very interesting and a lot of things make sense now especially when I read these acronyms lol

I changed the view on my KTuner to display the STFT 1 and LTFT1. My LTFT1 displayed around 4 and my STFT1 moved around from 0 to 10ish (fluxuated as high as 18 when shifting)

 

[PRL Motorsports]

Here are photos of mine.
not sure if you can tell without removing the MAF.

Remove the sensor and the engraving under the sensor will be revealed.

 

[du ma may]

 

[PRL Motorsports]

Si-Race

 

[du ma may]

Si-Race

Yup,waited a month for prl cai and catted downpipe.

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