HFS3 Ver 2 onto 8L Audi S3 1.8 20VT

[Richard L]

You can alter the ratio by using different values of resistance but you need a soldering iron with a small tip. I can post a pictures here if you want to have a go.
You can upgrade to HFS4 for the ratio is infinitely variable.

[dscline]

Cool! If you could post some examples for a couple different ratios (like 50/50, and maybe a couple more to get an idea of how the resistance values scale), that would be great!

[dscline]

Hi, just wanted to follow up on this... any luck finding the resistance values for getting the IDC/MPS ratio around 50/50?

Thanks!

[Richard L]

R1 = 27K
R2 = 47K
R2/(R1+R2) is the ratio of IDC% (~63%)

[dscline]

Awesome, thanks! So if I understand correctly, 27K for R1 and 47K for R2 are the stock values? If you wanted to change the ratio to 50/50, for example, could you simply replace the stock R1 resistor with a 47K resistor (or R2 with a 27K), or is there also a requirement to keep the total resistance (R1+R2) something close to 27+47 (74K)?

[Richard L]

As long as the total valve is around 60-80K, it will be fine.
Don't forget to link MPS as well.

[dscline]

Understood, thanks!