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Engine Specific Info and Questions => IDI Engine => Topic started by: ein bora on June 04, 2013, 08:20:06 am
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I'm finalizing/fine tuning my passat b5 gas to diesel project in which I'm using my GT2056 turbo along with a front mount intercooler. I've set up a mechanical system similar to libby's in which the vanes are fully open at idle and fully closed at full throttle. But I'm finding that without any boost early on as the gauge reads "0" - the car has little to no pick up and go. I'm thinking the sizable weight increase between a mk3 and the b5 making the difference.
With the lever from the pump disconnected from the mechanical control set-up, which leaves the vanes fully closed - there's adequate boost from take off, and boost raises as the rpm's increase. I haven't had it at any greats speeds as of yet as I still have a few things to iron out.
My question is, with the vane's full time fully closed and the linkage still hooked up to the boost can, wouldn't the boost can still open the vanes mechanically once the target boost is achieved and be a good enough set-up? or am I missing something here as this turbo/boost stuff is still quite foreign to me.
On another note - I couldn't get the passat's pedal throttle range to match the full range off of the IDI"s pump, the passat has about 3/4's the range so I adjusted the mechanical linkage accordingly, so that it still fully opens and closes the vanes via the passat's pedal and not the IDI's pump range. Not sure if this presents a problem or not as the pump is only 3/4's open when the passat's peddle is fully depressed.
Thanks for any input.
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if you can move the mounting point of the throttle cable closer to the throttle shaft u will be able to get full pedal/throttle travel to match. the rest i haven't ever played with.
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Yep. As simple as drilling a hole in the throttle arm. This could easily be your problem.