anybody good eith circuit design? frequency to voltage converter...

[DSteck]

I need to make a frequency to voltage converter for my meth system. I have the Alky Control kit, but the MAF converter stops at 11,200Hz. I need it to go way higher... like 15,000Hz or maybe just 14,000Hz.

Anyway, I've been furiously looking online but haven't been able to concretely find something to do. I'm probably just going to take apart the Alky Control controller and play with the capacitors/resisters myself, but I really don't want to do that just yet.

The LM2907 looks to be the easiest to do this with. So... who out there would be able to advise me of the circuit design for an LM2907 with max input frequency of 15,000Hz which would equate to 5v out? 5v supply by the way.

[planethax]

Just out of my own curiosity,
Why can't you use a boost reference controller?
I install a Snow system for a customer and it used Boost ref.
Could set the PSI that it started and the flow amount.

Again, just curious myself, have not worked on many Maf based tunes except my own car which is just a 6

[DSteck]

Because my engine's fuel demands at 4000rpm and 16psi are different from 7000rpm and 16psi.


I think I figured it out. R1 of 28K ohms, C1 of 2.35nF (will have to two a pair of 4.7nF in series), and C2 of 2.35nF should be the ticket to the range and filtering I want.

[planethax]

Because my engine's fuel demands at 4000rpm and 16psi are different from 7000rpm and 16psi.....

Gotcha, figured it was something like that.

Thank you.

[HOYS]

Have you ever looked into a mini-afc?