Engine Weights

[ikillcopiers]

After a bit of late night interweb browsing, I noticed a lot of people talking about
the LS V8 being lighter than the 944 lumps (yes, I am quite a sad individual....),
but the "evidence" is fairly vague, working on curb weights of the cars after
conversions, a lot of guys doing fibreglass bonnnets and the like at the same time.

How much does a 944 (2.5 8V) engine weigh?
How much more does the extra equipment for the Turbo add to the 2.5?

Curb weights aren't accurate as a lot of stuff was changed on the Turbo,
so I'm curious about engines alone.

I'm sure someone on here has a notion of these numbers!

Also, does anyone have an idea what the factory corner weights are,
and has anyone seen corner weights for an LS V8 cars for comparison?

None of those Americans seem to even know what weight distribution is!

 

[zcacogp]

Tom,

Got plans, have we?

[]


Oli.

ETA: Weight distribution is a consideration when going 'round corners. Why do you expect our stateside cousins to even know how to spell it, let alone what it means?

 

[Jonny944CS]

154kg according to Peter Morgan (IIRC) - never got round to weighing mine unfortunately

136kg for the 924

I guess you could add another 10kg for the extra cam + gubbins on a 3.0

 

[ikillcopiers]

ORIGINAL: zcacogp

Tom,

Got plans, have we?

[]

Hey quiet you there down the back!

Just doing some thinking, it probably won't progress
much further than that.....

Well, not untill I get a couple of packs
of jaffa cakes anyways []

ORIGINAL: zcacogp

ETA: Weight distribution is a consideration when going 'round corners. Why do you expect our stateside cousins to even know how to spell it, let alone what it means?

Too true, reminds me of when I got my suspension from Lindsey.
We set it up and decided the car was waaaaaaaaay too low, we said
to ourselves there must a problem here.
Gave Lindsey a buzz and turned out that was the max height they'd go
to on a road car.

Not have any bumps, hills or potholes over there guys????

Nice set of collars sorted that out a treat however!

 

[sawood12]

This is again one of those so called facts that I find hard to believe - I certainly havn't seen any evidence for this claim. The 944 engine from what I can gather is actually quite light - it is one of the main reasons why Porsche went for a 4 cylinder engine rather than a 6 - weight saving and lower friction. If the 944 engine is indeed half a v8 as alot of people seem to claim then why is it heavier than a true v8? It is an all alloy liner-less engine afteral. I'm happy to be proved wrong by some actual data though.

 

[sawood12]

944 turbo workshop manual says engine weight (dry) is 182kg. Not sure if that is dressed or not.

 

[sawood12]

Apparently, according to a google search, an LS1 weighs in at around 430 for an alloy block one and the cast iron block one is only 80 lbs heavier (alloy block one is steel lined), so it seems it is about 30lb heavier than a 944 engine - though i'm not sure if we're comparing apples with apples here in terms of engine dressing.

 

[Jonny944CS]

I think the Gen4/5 LS engines are getting down to around 140kg now.

I guess the V8 benifits on the scales due to optimal natural ballance and 50 years of tweaking.

The pistons and rods of the 4cyl Porsche need a fair bit of extra weight (flywheel/clutch + ballancer shafts) strapped onto the block to smooth them out.

However, that said, any weight saving may well be cancelled out by the parts, inbetween the clutch and the wheels, required to cope with the house demolishing torque of an LS.

 

[Neil Haughey]

Only reason why these V8's aren't mega heavy is because of the pushrods and thus tiny cylinder head compared to what it would to have with 4v overhead twin cam heads. I still have my old cooper S rally spec cylinder head sat in me mums garage, its both tiny and is easilly picked up in the hands. ISTR its only about 3" thick + rocker box, a 4 valve overhead cam head would be 4 times as big and heavy.

 

[tr7v8]

Having tried to move a 944 S2 lump around my garage it is a bl00dy heavy lump. Be careful comparing engine weights, a lot exclude exhaust manifolds which make a huge difference
especially comparing no manifold, aftermarket tube & original cast iron ones.
The balance shafts & other bit considerably add to the weight.
Don't forget it is old (70's) technology engineering where as the Chevy is absolutely current state of the art casting.