78/79 930s What makes them different from the other years

[kevin930t]

I was just wondering what are the differences are after the 79 model?I know 78 had alot of firsts,intercooler brakes,different rear deck lid,the engine wentvfrom a 3.0 to a 3.3,i am not sure about the turbo if it was different from the 75 through 77 hoping someone with alot more knowledge then myself will chime in.Its a broad question about how the 930 developed through 89.Thanks

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[93097004xx]

Originally Posted by kevin930t

I was just wondering what are the differences are after the 79 model?I know 78 had alot of firsts,intercooler brakes,different rear deck lid,the engine wentvfrom a 3.0 to a 3.3,i am not sure about the turbo if it was different from the 75 through 77 hoping someone with alot more knowledge then myself will chime in.Its a broad question about how the 930 developed through 89.Thanks

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Early 79s were essentially unchanged from the 78 930. Late 79s US spec were actually 1980 models sold as 79s in the US. The changes are seatbelt latches, flush headlamp washers really all small changes.

The floating rotors stayed on RoW 1980 930s at least for the for first batch. Not sure if it is documented at what point the floating rotors were phased out.

1983 was the big year the 930 had the first of many changes instituted from 1983 to 1986 the first being a change to its legendary boost delivery with revised fuel injection system and more linear boost delivery.

From 1984 to 1986 the suspension was revised to be more neutral as well.

The end result was a better mannered more refined less raw 930 with its 1986 reintroduction to the US market.

[T77911S]

non lambda on the pre 86 cars.
no emissions crap?

the 79 was the last of the true 930. they were titled 911 turbo in 86.

engine cases were changed. no sump plate, not sure when

[93097004xx]

1983 was the year the engine changed its internal designation number. Mostly for emissions and fuel injection changes.


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[ficke]

What year did the 930's have stamped fenders with the flares and not welded on flares?

[Mocker]

No cats on the 70s cars...

[Mick_D]

they just didn't make very many of them in those years is all.

[WERK I]

I believe the front turbo fenders were always stamped. The rear flairs were butt welded through '85.

[Rawknees'Turbo]

Originally Posted by 93097004xx

1983 was the big year the 930 had the first of many changes instituted from 1983 to 1986 the first being a change to its legendary boost delivery with revised fuel injection system and more linear boost delivery.

And what change would that be - nothing I'm aware of made the boost delivery more linear - same turbocharger, same ignition system (other than the rev limiter being moved from the distributor rotor to an over-engineered electronic box under the drivers' seat), etc. The addition of Lambda control did nothing for boost delivery - only help control/reduce emissions. The only revision to the fuel injection was the switch to the cast aluminum, Lambda fuel head - less susceptible to corrosion than the early, cast iron head, and uses a rubber primary diaphragm, as opposed to the early steel one, so is more resistant to damage from fuel pressure spikes, but again, does nothing with regard to boost management.

Originally Posted by kevin930t

I was just wondering what are the differences are after the 79 model?

Another change that I don't think has been mentioned is to the design and construction of the dash - I think starting with 1986, the dash tops were made of a material that is much more resistant to warping (on the top and the face area around the center vents), and the two vents on the outermost edges of the dash face actually became functional (the early ones are little more than slits that flow almost no air).

Huge, boat anchor York a/c compressors were used in the late 70's models - much better (smaller. lighter, more efficent) rotary a/c compressors used in the later 80's models (Japanese, Nippondenso brand).

[kevin930t]

I dont think 1 930 is better then tge other as i love all of them,except when they wont srart as you have your whole weekend planned around driving her,but thats usually somehow my own fault,haha.I am fortunate to have a couple 930s at my shop 1 being my 78 and the other a 84,physically the only difference i see as far as the cis is that there is a valve of some kind with a fuel line comming off the wur and going into the top of the fuel head with anothe vacuum line?going into tge top of the throttle boddy this couldnt be for smog because Porsche did not bring any cars back to the u.s untill 86

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[kevin930t]

gold anodized valve,is what i was reffering too

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[Rawknees'Turbo]

^^^

Kevin, that is a pressure damper to help control spikes in fuel pressure which damage the steel diaphragm and can also make the air meter arm flutter (not an emissions device).

[kevin930t]

I was hoping i could of put this in my 78 and it would of added 50 more ponies,wishful thinking right there.Did not know your dash had vented caps,and your right about that ac compressor,being such a boat anchor that one of the reasons i took mine off back in the day yhinking lighter is better.

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[Rawknees'Turbo]

Maybe it's actually a flux capacitor that's good for 75hp, Kev?!?!?!

[Rawknees'Turbo]

Another change was 9" width rear wheels started in 1986 (US market).

[kevin930t]

Originally Posted by T77911S

non lambda on the pre 86 cars.
no emissions crap?

the 79 was the last of the true 930. they were titled 911 turbo in 86.

engine cases were changed. no sump plate, not sure when

Why did they get rid of the sump plate?

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[Rawknees'Turbo]

Originally Posted by 93097004xx

The end result was a better mannered more refined less raw 930 with its 1986 reintroduction to the US market.

Please explain how the 1986 models are less raw. The only "more refined" element that I can think of is the a/c (dash vent design and improved compressor), but it still was woefully lacking in condenser capacity and evaporator design, so still sucked for use in genuinely hot climates.

Band aid devices were added to the ignition system in order to bring exhaust temps up quicker (aka - to block ignition vacuum advance when engine is cold), thus reducing start up exhaust emissions, but the boost delivery and abrupt throttle response remained the same.

[Rawknees'Turbo]

Originally Posted by T77911S

the 79 was the last of the true 930. they were titled 911 turbo in 86.

How so? The later VINs, when the change to the universal numbering system was made, still bear the 930 designation, but in a different location and the "zero" is replaced with an "x".

[kevin930t]

I thought the 78s through 89 came stock with 8s&9s x16"

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[Rawknees'Turbo]

Kevin, fronts on all years were 7", and 9" rears did not start on US models unill 1986 (don't know when 9"s started on non-US models).