Interesting engine weights???? GUESS
08-23-2009, 05:23 PM
#1
Race Director
Thread Starter
Interesting engine weights???? GUESS
So I was at the shop yesterday dropping off my new lemons project 1979 with the engine out & the engine for the Widow (S4) was sitting right next to it.....so after we weighed the lemons project (its silly light) we put a couple longacre scales (after properly zeroed) under each engine...here are the specs of each engine:
1979 16V with:
Headers, Alternator, airpump, Power steering + tank, AC compressor and some lines, full clutch and flywheel.....so basically a full engine setup....
1989 S4 32V
Alternator, and basically nothing else......no headers or flywheel....but everything else (TB & intake-injectors etc) are there.....
So how much do you think each one weighed? I was VERY surprised it was not the result I thought.....one engine was slightly heavier than I thought and the other was SUBSTANTIALLY lighter than I thought....so whats your guess???
1979 16V with:
Headers, Alternator, airpump, Power steering + tank, AC compressor and some lines, full clutch and flywheel.....so basically a full engine setup....
1989 S4 32V
Alternator, and basically nothing else......no headers or flywheel....but everything else (TB & intake-injectors etc) are there.....
So how much do you think each one weighed? I was VERY surprised it was not the result I thought.....one engine was slightly heavier than I thought and the other was SUBSTANTIALLY lighter than I thought....so whats your guess???
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08-23-2009, 08:05 PM
#8
Race Director
Thread Starter
16V............595lbs (279kg)
32V.....................................................439lbs (200kg)
I am very surprised......far heavier on the 16V than I expected....I figured around 550lbs...but I guess those accesories weigh ALOT.....and the 32V only had the alt on there..... So the clutch-flywheel assembly is probably 50lbs, alt is 17, airpump?? 15, PS plus tank is say 20, AC is another 20 thats 122lbs so it drops the 16V to 473....which is still heavier than the 32V???
32V.....................................................439lbs (200kg)
I am very surprised......far heavier on the 16V than I expected....I figured around 550lbs...but I guess those accesories weigh ALOT.....and the 32V only had the alt on there..... So the clutch-flywheel assembly is probably 50lbs, alt is 17, airpump?? 15, PS plus tank is say 20, AC is another 20 thats 122lbs so it drops the 16V to 473....which is still heavier than the 32V???
08-23-2009, 11:27 PM
#10
To break up the weights a little, the 16 V crank is a tad lighter likewise the pistons. The heads are lighter but the manifold is probably heavier. I agree with the weights you state for the various components, a bit puzzling as I have weighed all this pieces individually. I am just thinking has one engine still got its oil and coolant still in it versus the other drained? Did they go on the scales correctly no chance there was an error there? Ah, need to add the manifolds, 22 pounds or 10 kgs there.
Greg
Greg
08-24-2009, 12:53 AM
#12
Nordschleife Master
08-24-2009, 12:53 AM
#13
Race Director
Thread Starter
To clairfy how we weighed the engines....we used TWO longacre car balancing scales front to back.....& centered the engine as best we could on both scales....we used 2x4's to stabilize the engines, but zerod out the 2x4's on the scales....so we got two weights and added them together....
08-24-2009, 12:57 AM
#14
Nordschleife Master
yeah im with Wally
I cant believe you weighed a 32V at only 440lbs
Its actually kinda shocking that these all aluminum engines weigh so much. When people say they wanna put these engines in their 914 or some race car i laugh, the M28 is NOT an ideal racing engine, its far too big, far to tall, and far too heavy. Ideally the M28 belongs in a 3500lb GT car, and ideally this massive thing should be bigger internally than a mere 5.0 or 5.4L. I guess porsche had it right, but a racing engine in a purpose built race car it is NOT!
this does show that you could likely take 100lbs off the front of the car by replacing the alternator with a more modern delco, you could likely do the same with a newer more compact AC compressor. The twin disc with rogers aluminum flywheel would take off another 20lbs, eliminate the smog pump and its plumbing, replace the cast exhaust manifold with some headers and remove the cat for an X-pipe and you probably have 100lbs right there off the front axle on things that most people replace anyway when the start modding the car.
hmmmmmm i think im onto something here
I cant believe you weighed a 32V at only 440lbs
Its actually kinda shocking that these all aluminum engines weigh so much. When people say they wanna put these engines in their 914 or some race car i laugh, the M28 is NOT an ideal racing engine, its far too big, far to tall, and far too heavy. Ideally the M28 belongs in a 3500lb GT car, and ideally this massive thing should be bigger internally than a mere 5.0 or 5.4L. I guess porsche had it right, but a racing engine in a purpose built race car it is NOT!
this does show that you could likely take 100lbs off the front of the car by replacing the alternator with a more modern delco, you could likely do the same with a newer more compact AC compressor. The twin disc with rogers aluminum flywheel would take off another 20lbs, eliminate the smog pump and its plumbing, replace the cast exhaust manifold with some headers and remove the cat for an X-pipe and you probably have 100lbs right there off the front axle on things that most people replace anyway when the start modding the car.
hmmmmmm i think im onto something here
08-24-2009, 02:11 AM
#15
Race Director
Thread Starter
yeah im with Wally
I cant believe you weighed a 32V at only 440lbs
Its actually kinda shocking that these all aluminum engines weigh so much. When people say they wanna put these engines in their 914 or some race car i laugh, the M28 is NOT an ideal racing engine, its far too big, far to tall, and far too heavy. Ideally the M28 belongs in a 3500lb GT car, and ideally this massive thing should be bigger internally than a mere 5.0 or 5.4L. I guess porsche had it right, but a racing engine in a purpose built race car it is NOT!
this does show that you could likely take 100lbs off the front of the car by replacing the alternator with a more modern delco, you could likely do the same with a newer more compact AC compressor. The twin disc with rogers aluminum flywheel would take off another 20lbs, eliminate the smog pump and its plumbing, replace the cast exhaust manifold with some headers and remove the cat for an X-pipe and you probably have 100lbs right there off the front axle on things that most people replace anyway when the start modding the car.
hmmmmmm i think im onto something here
I cant believe you weighed a 32V at only 440lbs
Its actually kinda shocking that these all aluminum engines weigh so much. When people say they wanna put these engines in their 914 or some race car i laugh, the M28 is NOT an ideal racing engine, its far too big, far to tall, and far too heavy. Ideally the M28 belongs in a 3500lb GT car, and ideally this massive thing should be bigger internally than a mere 5.0 or 5.4L. I guess porsche had it right, but a racing engine in a purpose built race car it is NOT!
this does show that you could likely take 100lbs off the front of the car by replacing the alternator with a more modern delco, you could likely do the same with a newer more compact AC compressor. The twin disc with rogers aluminum flywheel would take off another 20lbs, eliminate the smog pump and its plumbing, replace the cast exhaust manifold with some headers and remove the cat for an X-pipe and you probably have 100lbs right there off the front axle on things that most people replace anyway when the start modding the car.
hmmmmmm i think im onto something here
Ryan
Saying the 928 engine is not a racing engine or even remotely close to it is a bit of a stretch...just ask all of the guys who drove REAL factory racing porsches this weekend at Laguna seca what they think of the 928 V8....as compared to their "real" racing Porsche engines? They had plenty of time to watch the 928's roar off in the distance to think about it....since Anderson won both races and Joe Fan got 2nd and 4th.....
However I am all for reducing weight over the front axle.....if the accesories are a legit 100lbs off the front end, since you have to keep an alternator....Anderson does run electric power steering mounted in the middle of the car??? better to have that weight further back!!