Evoms Swiftshift & Diverter valves- fitted

[bluesatin]

Well I launched in and fitted the bits yesterday.

The swiftshift is easy to fit especially if you know the location of all the screws. The bits include the plastic bit at the end of the gearlinkage (the one that falls apart) and replacement ali bushes. All in took about 2 hours.The shift is now solid without being stiff and now slides into gear with a very positive feel. Evoms claim a 20% reduction in travel.

The diverter valves were bit more of a challenge as it is a very tight fit in the engine bay not helped by spring clips rather than jubilee clips being used by Porsche. All in it took about 3-4 hours to remove the old valves and fit the new ones. Well after the effort it was well worth it with the engine showing more 0.8-0.9 boost than before (0.7-0.8 on a X50 engine). The car certainly pulls better on full acceleration. The car is 02 model with 30K miles. The old valves look OK but the springs must have lost a lot of Spring and so boost!

Just thought you may want to know

[996tt_stevo]

Changing DV's will not increase boost! It will make it slightly more responsive!

Edited by 996tt_stevo on Friday 23 June 17:57

[domster]

I think what Guy(bluesatin) is saying Steve is that the old diverter valves may have been leaking a bit with their weak springs, so full boost was not possible before. Now the car delivers the boost it should. So they don't get you more boost, just the boost you always should have had. Is that what you meant Guy?

[996tt_stevo]

Yip!

[bluesatin]

Domster

Thanks for sorting out this misunderstanding of technical terms. I will see if the change will increase my brunter vmax over 181mph.

How is the Ultima build going?

Edited by bluesatin on Friday 23 June 18:25

[schuepbach]

bluesatin said:

All in it took about 3-4 hours to remove the old valves and fit the new ones.

must take you a week to do an oil change

[slippydiff]

schuepbach said:

bluesatin said:

All in it took about 3-4 hours to remove the old valves and fit the new ones.

must take you a week to do an oil change

Who kicked your kennel ?

Give the bloke a break, many is the person who would have paid good money to a garage to have had the job done rather than giving it a go themselves.
Good luck to the bloke I say.................

[clubsport]

BlueS, managed to build a top notch Ultima......I think he made a good point that the DV's are exactly accessible, better to get a job done right than look at the clock.

[dazren]

Hmmm my 02 X50 is also on 30k miles so I may have to look into these diverter valves thingamys.

cheers

DAZ

[bluesatin]

Thanks for the support. Nice to see such a negative comment from somebody that has posted a grand total of once on PH.

Would love to see him do it significantly quicker with all the clips bar the one on attached to the Y facing the front of the car.

Daz you are welcome to take it for a spin at vmax

Guy

[dazren]

bluesatin said:

Daz you are welcome to take it for a spin at vmax

Excellent cheers. It'll be interesting to see if there is any difference in how the two cars drive. I know previously there has barely been 1 or 2 mph in it which can be put down to your factory spoiler kit.

DAZ

[Rods]

Recently upgraded mine,pig of a job,local mechanic finished it off for me.
It does seem to hold boost better though,a worthwhile upgrade.

[nel]

996tt_stevo said:

Changing DV's will not increase boost! It will make it slightly more responsive!

Quite right - even with shagged diverter valves the engine will still achieve full boost, so the absolute boost figures should not change (controlled by the ECU). However, the low end and post-liftoff pick up should be improved if the old valves were knackered.

Nonetheless a worthwhile change, given the reputation for the plastic Bosch diaphragm valves to be intolerant of high engine bay temperatures. Certainly made my 993 feel like it picks its skirts up quicker when given the schnell schnell order.

Full marks for spinning spanners yourself - I'm determined to keep doing it myself too. Only problem with a 911 is that you REALLY need a 2 post lift, which means that I need a new garage...

[996tt_stevo]

If you wish to hold a consistant boost you really need to upgrade the wastegate springs, it's a heavier/tighter spring that doesn't flutter as much as standard and therefore maintains a constant boost level. I now have them on mine and these are superb!

Edited by 996tt_stevo on Saturday 24th June 11:21

[domster]

bluesatin said:

Domster

Thanks for sorting out this misunderstanding of technical terms. I will see if the change will increase my brunter vmax over 181mph.

How is the Ultima build going?

Edited by bluesatin on Friday 23 June 18:25

My pleasure. Now who wants a quick engine rebuild while I'm at it?

Ult panels are done but not fixed; chassis got to go off for powdercoating (again!). Other stuff done but too off topic for here. Will share over a beer at the White Horse

[egbert]

slippydiff said:

schuepbach said:

bluesatin said:

All in it took about 3-4 hours to remove the old valves and fit the new ones.

must take you a week to do an oil change

Who kicked your kennel ?

Give the bloke a break, many is the person who would have paid good money to a garage to have had the job done rather than giving it a go themselves.
Good luck to the bloke I say.................

I just went to Weltmeister and went on a drift course at Silverstone while they did it for me, very nice mods to make in my opinion, throttle response seems better with the DV's and gearchange is excellent.