[s-cars] 1.8 bar wastegate spring install and impressions

[chris chambers]

Gents, Sean;

OK, I'm confused as to what this does.

I have mine setup to "RS2" specs and wish my turbo spooled
up quicker than it does.

Would making this mod allow my turbo to spool up quicker?


Thanks
Chris


--- Sean Douglas <quattro20v at telus.net> wrote:

> Just finished installing the 1.8 bar wastegate spring. I did the
> diaphragm at the same time, but it's a bit more involved to do.
> 
> If you are going to do the diaphragm, its much easier to remove the
> wastegate and disassemble it on the bench. If not, the spring can be
> easily replaced while the WG is in place.
> 
> Wastegate Removal:
> 
> 1. remove the 3 bolts and nuts where the flex connection attaches to
> the
> downpipe
> 2. remove the large banjo bolt where the vacuum line attached
> 3. remove the 4 nuts holding the wastegate to the manifold
> 4. remove wastegate with flex pipe attached and take to bench and
> hold
> in vice
> 5. you may need a new downpipe gasket if its original, mine is about
> 2
> years old so I didn't bother. Also if the bolts have never been
> apart,
> it's a good idea to use Rost-off (or the like) and have some new
> hardware on hand. The copper nuts are easy to round off.
> 
> Cap Removal:
> 
> 1. remove the six little nuts
> 2. my wastegate cap was stuck on pretty good, I had to wedge a small
> flat blade screwdriver between the diaphragm and the cap and lightly
> tap
> it with a hammer.
> 3. remove cap
> 4. remove spring
> 
> Diaphragm Replacement:
> 
> 1. use a allen key wrench on the underside of the piston to prevent
> the
> piston from turning and remove nut
> 2. remove washer
> 3. pull out piston with diaphragm attached
> 4. remove large black backing plate (I had to wedge a small
> screwdriver
> in and tap with a hammer)
> 5. install in reverse and use blue loc-tite on the nut.
> 
> Driving Impressions:
> 
> Boost comes on much quicker and at less throttle opening. At half
> throttle, boost builds much more quicker - not sure if I like this,
> makes it hard to modulate, kinda reminds me of MTM 1+.
> 
> It "feels" faster because boost builds faster - not sure if ultimate
> power is increased.
> 
> Now for the downside - maximum boost is increased, I'm seeing 1.9 bar
> on
> my Greddy electronic gauge with peak memory, with the stock spring I
> saw
> 1.6 bar max. This is with Dahlback software. At 1.9 bar boost it
> pings
> pretty bad and I don't think this high level of boost can be good.
> 
> I've replaced the stock spring until for now - unless someone has any
> suggestions.
> 
> Sean D.
> 
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
> 


Make April 15th just another day http://www.fairtax.org


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com