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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Sat Jan 12, 2019 5:25 am    Post subject: Reply with quote

It's still not clear to me if speed 1 and reverse are going badly because of shifting mechanism or something is wrong inside the gearbox (dog leg).

Sometimes works good - sometimes not.

Synchroniser rings are interchangeable?? (to use 3 and 4-th gear from my ex dog-leg gear box - 924 NA 1979??).

My former dog leg gearbox had problems in differential box.

For sportiness I prefer dog leg.
For comfort and motorway - Audi.
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1980 Porsche 924 Turbo (931) diamond silver metallic/helios blue metallic
sold Porsche 924 NA 1979
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morghen  



Joined: 21 Jan 2005
Posts: 7976
Location: Romania

PostPosted: Sat Jan 12, 2019 7:12 am    Post subject: Reply with quote

To me the Audi box feels more meaty, the G31 has a nice pattern but feels more open space to operate and takes a bit to learn where the gears are.
With new linkage bushings to me it felt pretty good but the Audi box with worn bushings felt just as good.
Most Audi boxes still shift very well today, while most G31 are scrap.
In my eyes the Audi box is much better....so what that it moves? Not relevant to the driving I do...maybe not relevant to the driving you do as well.
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Fifty50Plus  



Joined: 28 Feb 2008
Posts: 1029
Location: Washington DC area

PostPosted: Sat Jan 12, 2019 1:48 pm    Post subject: Reply with quote

As Morghen says, most dogleg boxes go bad. Several sliders and dogteeth are NLA. To get my race box working right, I had to dig through 3 other boxes to get mine working good. I didn't have any shifting problems with the Audi box but I really don't like the location of 5th gear and the sloppiness.
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1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car
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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Sat Jan 12, 2019 10:31 pm    Post subject: Reply with quote

For me starting away from stand still is better at the dog leg box. (924 NA).

10-20 meters were pulling both rear wheels with dog leg.

After I put Audi gearbox maybe 10 cm both rear wheels are working.
After 10 cm only one wheel is pulling. (the back becomes unstable)

It is very true that most dog leg gearboxes have problems. Audi gearboxes are more comfortable and reliable. Shift linkage is simpler.
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sold Porsche 924 NA 1979
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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Mon Jan 14, 2019 9:10 am    Post subject: Reply with quote

Let's go ahead with another question.

Ref. to spark plug wires:

They do not seem to have a support which would not allow them to touch the hot engine.

How are the spark plug wires arranged on an original car? Anybody got a picture?


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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1699
Location: Somerset, UK

PostPosted: Mon Jan 14, 2019 8:26 pm    Post subject: Reply with quote

Your wires look too long to start with. Even if they do touch, they would suffer more from abrasion than heat as the head/cam cover should not be more than 100deg at any time.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Tue Jan 15, 2019 1:28 am    Post subject: Reply with quote

There are signs of abrasion - More obvious to only one wire.

I'll check if they can be shortened.
Was the original system supported in any way?

At 924 NA I had 2.


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Johann  



Joined: 07 Aug 2016
Posts: 207
Location: Netherlands

PostPosted: Tue Jan 15, 2019 3:04 am    Post subject: Reply with quote

The Turbo uses a similar system of brackets like the normaly aspirated versions, the just affix to different cam cover studs.

I had a look, but I don't have a great foto's of the plug leads of my engine, but I hope these help



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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Wed Jan 16, 2019 5:34 am    Post subject: Reply with quote

Thank you Johann.

I took a cable to check if I can shorten it. I think it can be shortened quite easily.

Later I will mount a system of brackets like the normaly aspirated versions.
I think I have a few left somewhere....


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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1699
Location: Somerset, UK

PostPosted: Thu Jan 17, 2019 10:30 pm    Post subject: Reply with quote

no brackets needed if wires are a better length and going direct from dizzy to plug, especially when going under the boost tube. Just a few wire clips to hold the wires in a tidy manner. 3x here. One 4way, 3way and 2way clips used


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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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Johann  



Joined: 07 Aug 2016
Posts: 207
Location: Netherlands

PostPosted: Fri Jan 18, 2019 1:54 am    Post subject: Reply with quote

That is nicely solved!
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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Fri Jan 18, 2019 4:50 am    Post subject: Reply with quote

Very nice! I now have 2 solutions.
Problem solved.
I ordered: Distributor Rotor / distributor cap / ignition lead set / dust cover for distributor / and some bushing for antiroll bar

Ref. to: Bosch Distributor Rotor

I found some very simple. Others are more complicated and expensive.
Which would be more appropriate and why?
Both of the rotors are bosch.


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1980 Porsche 924 Turbo (931) diamond silver metallic/helios blue metallic
sold Porsche 924 NA 1979


Last edited by MOTANUL on Fri Jan 18, 2019 4:55 am; edited 1 time in total
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1699
Location: Somerset, UK

PostPosted: Fri Jan 18, 2019 4:54 am    Post subject: Reply with quote

Option on the left has a centrifugal spring and activates a RPM limiter if over rev'ed. The one on the right does not, so up to your right foot to avoid going over 6200rpm. Up to you, but both can be bought for less than 5 ea. I use the one on the right at my risk of max rpm!

IIRC both are in common with many euro cars such as BMW, VW etc.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252
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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Sat Jan 19, 2019 3:44 am    Post subject: Reply with quote

I can not find the bushing at the end of the stabilizer bar. (23 mm antiroll bar)

Even worse: on one side I have a dimension and on the other side I have another dimension.

23mm / 30 mm - 23 mm / 35 mm.

At first sight the little one is better. It came out very hard just hammered.
the large one came out very easy. The code written on it is for 24 mm (944).
Original spare part push rod 23 mm / 477411057K it's expensive because it inclued the metal part.

Does anyone know a code just for the bush? 23mm / 30 mm or 35 mm?

If I had to choose I would put both 30 mm. But I do not know which is the original side.




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MOTANUL  



Joined: 19 Nov 2018
Posts: 62
Location: ROMANIA BUCHAREST

PostPosted: Sun Jan 20, 2019 8:22 pm    Post subject: Reply with quote

If no one knows, we're going to the next ones.

I decided to cut spark plug wires (ignition lead) to size. Even the original size are longer than it should be.

1. There is another hose (vacuum with red in pictures) that I think is too long.
You can confirm that it is too long?
I want to shorten it - not to hang on the engine.

2. Last question: spark plugs. On the car I found Bosch W3DPO. I was told that the spark plugs are too cold.
recommended are BOSCH WR7DS (for max 0,7 boost)
https://www.sparkplug-crossreference.com/convert/BOSCH_PN/WR7DS

I want to buy NGK iridium bpr6eix - crossreference with Bosch.


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