924Board.org

[chris79]

I replaced timing belt and fuel pump. Now I set timing at -10°, but performances are not good , 0-100km in about 13s.
I found this photo on internet, timing is not -10° but first mark before 0.
What's correct timing setting for 924 na 125hp?
Thanks
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro

[morghen]

Do you have a Haynes manual? it should be written there.
Also, in the engine bay you should have a sticker that tells you what the advance should be.
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Supercharger and EFI kits
https://www.the924.com

[chris79]

I have no haynes manual and now even online version is out of service.
The oil pump mark is aligned to flywell mark on 0, it't possibile that exact timing is 0 on this version? Now I aligned even mark on camshaft to this value. Is enough or I have to set some advance?
_________________
Porsche 924 2.0 na 125hp (1979) euro
------------------------------------------------------
Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro

[brian19600]

From Haynes:
1976-1980 European models, 125hp engine:
10 degrees before top dead center at 950 +- 50rpm with vacuum hoses disconnected
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78 924

[chris79]

[Ozzie]

Crank and Camshaft must align.
Ign timing is 10 deg but find mine likes 8 unless I use 98 RON fuel which is $6 a US gallon
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[KDJones2000]

Timing marks are on the FLYWHEEL, not the front of the engine.

There is an opening near the master cylinder in the bell housing you need to use to set your timing.
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1987 924S SPEC car
Team Toofah Racing
1988 944 Turbo S

[chris79]

Ok but my question is when Mark on camshaft is centered, Mark on flywell must be -10, 0, +10, One Mark before or after zero, ecc ?
_________________
Porsche 924 2.0 na 125hp (1979) euro
------------------------------------------------------
Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro

[pierro]

With cylinder 1 at TDC, the camshaft AND the crankshaft pully on their MARKS, the flywheel mark should be on 0 degrees.

The IGNITION timing for a 924 na is -10degrees on the flywheel markings, checked with a stroboscope ( timing light) at 950rpm and the vacuum hose disconeccted from the distributor.
_________________
Porsche 924 1983restored
MG-Midget 1974 restored
Citroen 2CV 1986 restored
Rover Mini 1275 1992 restored
Mazda MX-5 1.8 for the fun
Toyota Lancruiser Prado daily driver
Merceds Benz W124 230E for the quality

[chris79]

Ah ok thanks, all Mark have to match.

However, if it can be usuful, there is even Mark on oil pump and I verified this on my car.



http://www.porscherepair.us/porsche-924-engine/installing-drive-belt.html
_________________
Porsche 924 2.0 na 125hp (1979) euro
------------------------------------------------------
Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro

[Ozzie]

The mark on the crank pulley and oil pump should align with the flywheel mark.
If they dont the flywheel was refitted wrong.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[chris79]

Yes, three marks match , now I have only to set advance with timing light.
_________________
Porsche 924 2.0 na 125hp (1979) euro
------------------------------------------------------
Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro