0.9 Bar WG spring measurements please

[Rusty]

From the Audi20V_Kruemmer site

Thanks Jamo, already received that in an email. The MTM spring is an absolute beast, calculated at 1.5 bar in a stock WG housing, a bit less with an adjuster screw, as MTM did. I'd be suprised if they used the WGFV at all with that bad boy

[Rusty]

Somebody sent me a bed spring in the post - will it fit in the WG I wonder. Its a beasty thing...

It fits alright, just make sure you've had your spinach before attempting to get it compressed Should give the boost levels we discussed, did on mine. Try it out with a stock WG cap and WGFV unplugged and report back, car feels a little spluttery on it, as you'd expect. Adjustable WG cap means that pre-load can be dropped by approx 25%. Part load is where you'll notice the difference, makes balancing the car on the throttle so much easier although you have to recalibrate the right foot in traffic. V stream almost feels laggy in comparison . I'm almost tempted to go the whole hog and get a 1.5bar spring in there...

[Rusty]

Sorry for offtopic, but do someone know whats the differense in boost between having the wg-screw in bottom/top with original-spring?

Fully wound out you're looking at 0.3 Bar

Fully wound in you're looking at 0.6 Bar

HTH

Base setting with OE adjuster screw is with 10mm between screw top and cap top.

[S2central.net]

I have a spare WG here with adjustable cap - will likely try it out on benchtest with compressor first just to get a feel for the beast...

Then I'll try on the car with WGFV assistance being dialled in by emulator. I hope its not too snatchy and twitchy at part throttle with it wanting to build boost too quickly. That smoothness across the throttle pedal range is something that is nicely controllable by software in conjunction with a less rampant WG spring - so will be interesting to see how different it drives.

[Rusty]

The V stream more than adequately caters for those requiring refinement, this is a lot better for actually driving the car IMO. It only gets carried away if you leave your foot on the accelerator too long at 3k+. Suggest you give yourself a good hour to get used to it, it's very different to the dead pedal you get with the OE spring.

You should be looking at 40mm between the cap and WG when fitting the spring.

[S2central.net]

I am going to double check positions - memory is of 25mm gap on an unmodified WG - which is my preference for an ideal position to start tweaking the software side of things... That may not be viable of course or we may need a tweak on this big bed spring to work at default setting...

[Rusty]

OE spring gap is approx 46mm. my spring is 6mm shorter

Fit it to a stock WG cap, i.e. as I've tested it and as it was designed to work and see what you get, should be as per figures in my PM

[newsh]

Yeah, I understand all those points, and there's nothing wrong with information. Just offering that there's no need to re-invent the wheel if you're looking for a 1.9b spring, we can do group shipments to drastically cut down on costs. If someones going to do a run out there I wager we'd be able to beat whatever pricing was offered, including shipping. Plus we typically have a bunch in stock, so it's an off the shelf, no-wait order.

@ Newt, great avatar

[newt]

Thanks!