Aftermarket Turbo Controller for m_TDI's

[ventil]

And how you set the desired boost?  example: 18PSI...  you have a boost spike?

You can set the boost with RV2 trim. If You don't need full boost on low rpm You can set initial low output voltage with RV1 trim. If You want to opposite, You can set RV1 to minimum and connect diode (diodes in rows) between A abd B points on K8004. Boost spike is about 0,5 sec - when I have adjusted 1,3 bar boost - for 0,5 sec I have 1,5. I think is not to much but of course You can to reduce this witch RV1 trim.

I think this circuit could be taken further by splicing a pot (TPS) into the feed to the dcin to modifiy the boost level relative to the throttle position.

Yes, of course, You are right.
 bar

[lbreton]

You can set the boost with RV2 trim. If You don't need full boost on low rpm You can set initial low output voltage with RV1 trim. If You want to opposite, You can set RV1 to minimum and connect diode (diodes in rows) between A abd B points on K8004. Boost spike is about 0,5 sec - when I have adjusted 1,3 bar boost - for 0,5 sec I have 1,5. I think is not to much but of course You can to reduce this witch RV1 trim.

Thanks Ventil, your control system is a gem.

[ventil]

I made it for my m-TDI with VNT GT2052 - but everyone, who wants VNT turbo can do this - it's really simple and works well.

[ahto42]

Can i use TPS insdead of mpx4250?

[ahto42]

And how is the Cruise mode solution?

[ahto42]

Can i use TPS insdead of mpx4250?

 :?:

[aidan]

Anyone who knows much about electronics, how much would it cost to make Ventil's system above?

[ahto42]

ca 20$ for k8004, 8$ for big resistors an 'd condensers, 35 $ for used N75 valve, 2$ for scrapyard N75 connector wire.
im planing to use TPS insdead of pressure sensor

[T3-mtdi]

I want to built a Vnt controller too. Is this the complete List?:

Voltage Regulator 7805 5V 1A
Voltage Regulator 7512 12V 6A <- I cant find
K8004
4 Resistors 10 Ohm 15 - 25 W <- I can choose between 11 W and 25 W.
MPX4250 <- I find only MPX 4250DP i think there i no difference
diodes 1N4148
condensors:
1µF 10V <-
0.01 µF    <-which voltage
470pF     <-is it realypico Farrad which voltage
4x 0.1 µF       <-which voltage
sorry. perhaps these questions seem stupid to many people but im more the mechanic than the electrician!
Are there any new ideas? Easier ways?

[Sprockets]

Thought I'd post in here, and pimp the controller I'm building over in the IDI section.  If you're not familiar with it, worth a read as it will be FULLY featured, and hoping for a price of around 120-150GBP.  The schematics (all be it the early design) are over there to  Source code is still in production, so as of yet, nothings available.

To help out T3-mtdi,

the voltage reg @ 6A is a) hard to get and b) expensive.  From a quick look, you should be able to get by with a 5 amp version (which at 12V is a fair bit of juice....)  to get all the parts, just search through digikeys website.  The 5A 12V reg from Nat Semi will do the job, I think part number LM2588S-12-ND, but I haven't looked to far into the schematics to be 100% sure on current draw, if you can't get that, could always run 2 in parallel, then you'd have 10A capability

As for the resistors, go for 25w, as means they can handle more power.  Just means they are generally bigger and more expensive.

The MPX4250-DP is a DIFFERENTIAL pressure sensor, not an ABSOLUTE pressure device.  Google the difference

Yes, the value really can mean pico farad  And the voltage has to be over the maximum it will normally see.  For most stuff, it is 16V rated, but not sure on his flyback design (if any) from the N75, which can see high voltage spikes.

Hope this is of some help.

-Gavin

[ahto42]

TPS?

[oldskool rich]

wow, that jeep is bad ass, one of the best things ive ever seen on here, thats a real inspiration


just one question, is that pop off dump valve thing realy needed?

my VNT control is nearly the same as that but mine dont work very well, urs looks a bit more sturdy, think im gona copy you

hydm