924S Engine a "De-Tuned" 944 Engine?

[OK-944]

I occasionally see a reference that the 924S engine, while it is basically the same engine as the 944...is also somewhat "de-tuned." Can anyone here substantiate this? And if so...how was this de-tuning accomplished - and what has been sacrificed vs the 944 version?

[v2rocket_aka944]

IIRC thats not really true.
1987 should have the same ~147 9.5 compression engine in a 924S vs a 944.
in 1988 they should both have the high compression 158ish HP engine.

may be remembering wrong.

[Racerbvd]

The 924S has a shorter 5th gear than a 944, to keep the top speed less than the the 944.

[OK-944]

...which begs another question: can I also drop a 1987 924S tranny into my 1987 NA 944? Or is the tranny mounting setup different? I ask because for the majority of my driving with my 944, a short fifth would make so much sense!

[944 Ecology]

Originally Posted by OK-944

...which begs another question: can I also drop a 1987 924S tranny into my 1987 NA 944? Or is the tranny mounting setup different? I ask because for the majority of my driving with my 944, a short fifth would make so much sense!

You could do it, but you would lose your electronic speedometer.

[944 Ecology]

Originally Posted by Racerbvd

The 924S has a shorter 5th gear than a 944, to keep the top speed less than the the 944.

According to the Tech specifications booklet, the 924S had a short 5th gear in the USA for the 87 year and the 85/2-87 944 had the taller 5th gear. In 1988, both cars had the short 5th gear. The reason that the 924S has a (1 mph) higher top speed is the skinnier body and the smaller tires. IIRC, the top speed of the 924S was 132 and the top speed of the 944 was 131.

[racer]

I think what blurs this is that the Clarks garage mentions the 87-88 944 has 158hp which makes it seem like the 924S had less hp (147). In a streamlining/cost issue, the engines were made the same for 1988 (global change) - 158hp. I've found elsewhere (Owners manual?) that my 87 944 was rated at 147hp - same as my 87 924S

Both of these are less than the Euro 944 2.5 that was rated 163PS.

And well, cause Germans use PS, (or Kw) and the Brits use BHP and the US uses HP, they are all a little different.. This was even more confusing in the late 60s early 70s as you had DIN, HP, BHP, SAE gross and net HP etc (what was Japan.. JIS?)

[v2rocket_aka944]

moral of the story, they're all slow!

[944 Ecology]

Originally Posted by v2rocket_aka944

moral of the story, they're all slow!

As a friend of mine said, "A normally aspirated engine has infinite turbo lag."

[Fast Freddy 944]

Never heard the term "shorter" gear before? Higher and lower gear ratio's make sense to me...