3.6 weight vs. 3.0 SC engine

[jmz]

I know this is somewhere on the sight but haven't found it by searching.

Can anyone post the weight of a 993 3.6 engine set up for an early car vs. a 3.0 SC based engine?

ARe the larger rear springs more for the weight or increased torque of the larger 3.6 litre engines?

Weighing my future engine options (pun intended) and looking for some facts.

JZ

[scruffy1]

try looking here
Weight of the 911 2.0 6cyl.

note the key search words
"engine+weight+and+comparison"

[widebody911]

You'll want larger t-bars to deal with the torque.

[Jack Olsen]

As Bill points out in the other thread, once you go to headers, remove the AC, and put in the flywheel/clutches typically used in swaps, the practical effect is that the 3.6 powerplant, will weigh about the same as a 3.0, and slightly less than a 3.2.

Displacement don't weigh a thing.

[Bill Verburg]

As posted in the other thread the weights are comparable, but like Thom said the torque isn't. In normal street use stock t bars will be fine but to reallly get it on(on track only, of course) bigger is better

[jmz]

3.6 litres is sounding like a decent option. selling off some of my vintage stuff to pay for it makes it ALMOST financially responsible.

there may be a 2.8 twin plug engine and a hot rod 3.0 for sale here soon folks!

jZ

[randywebb]

"slightly less than a 3.2."

- sounds odd, doesn't it? But PAG did a bunch of CAD work on the cranks, and the valvetrain is a bit lighter also.

[dd74]

I've heard and read the same about the 3.0s and 3.6s having close to the same weight. But then I've heard 3.2s can be lightened considerably with 993 headers. Seems as if the big weight is in the exhaust.

[surflvr911sc]

Dave, I never got around to answering you on the other thread (sorry) about loosing 100lbs in my conversion but this looks like a good spot.

I'll break it down to where I added weight and where I lost it, not counting the engine itself. The engine is a '93 (plastic intake), has a cone filter, RS heat tube, & B&B exhaust but is otherwise stock.

ADD:
Two front oil coolers
DME & wiring
964 retractable tail & controller/switch (not related to conversion, obviously)

Lost:
CAT & crossover (lots of weight there)
A/C compressor and deck lid condenser (condenser doesn't weigh much) I’ll most likely add a new compressor and belly condenser but overall they will weigh less than the original parts.
CIS
CIS O2 CU
Interior sound deadening (every little bit helps)
SC door panels converted to RS
Engine & Engine compartment dirt

Everything else is the same. 100 lbs is definitely optimistic for a straight conversion but I doubt you would add a thing.

[frencjas]

My car lost 25lbs+/- going from a 3.2 with SSI's & dansk single out, to 3.6 varioram with lightened flywheel, headers & dual out Dynomax custom exhaust. More power AND less weight, hard to beat that!

[surflvr911sc]

Good point about the flywheel, I forgot about that.

[fintstone]

Seems to me that if you lighten the 3.6 by removing the cat, a/c, a new exhaust, etc...that you would be losing approximately the same amount from the 3.0 (or more) when removing the same items...which would still leave a significant heavier 3.6 than 3.0....especially since you would have to have a computer and additional cooling for the 3.6. What am I missing?

[surflvr911sc]

True, I forgot that my CAT was replaced w/ a by-pass pipe though. Damn I'm full of misinformation today. I forgot the extra four quarts of oil (add) & the 3.0 heater blower (loss) too.

I think the CIS is heavier. There are so many lines and hoses, Motronic is a much more simple system, and the CIS airbox, filter housing, fuel dist. & etc. is quite substantial.

I forget how much the SC flywheel weighs but that's got to be a 10-20lbs savings.

EDIT: The oil cooling didn't add too much, as long as you already have at least a trombone. The coolers themselves are really light, I bet the four extra quarts of oil weigh almost as much.

[dd74]

Fint: I think it's a matter of how the engine is weighed. I would imagine cooling wouldn't be included in either motor as real 911 cooling is done externally.

Regardless of that, as Ryan says, there are many newer plastics and metals in a 3.6 a 3.0 can't even hope to have - all of which make it roughly the same weight as a 3.0 though the 3.6 is larger.

[fintstone]

I agree to a point. Obviously the weight difference would never make up for the HP and torque improvements in a 3.6. Also, I agree that additional displacement is basically cylinder volume or air..hence little increased weight....on the other hand, if you start out with a 3.6 that is approximately 50 lbs heavier and remove similar components..A/C, smog parts, aftermarket exhaust, etc....and add a computer, additional oil, probably an additional oil cooler or a larger one to the 3.6....Your car's overall weight should increase vis a similarly prepared 3.0

[Jack Olsen]

It would seem to me that the stock 964 flywheel/exhaust/AC components are heavier than most of their SC counterparts. That dual mass flywheel was a porker.

[Bill Verburg]

If you limit yourself to only looking at the factory #s then you get some solid and comparable #s

the dual mass flywheel alone is ~40 some odd #s, I also think(but don't know for sure) that the factory weighs w/ a/c compressor except on RS models.

I have personally weighed a 964RS w/o a/c w/ a normal light f/w @~450# and a C3 w/o a/c and w/ a normal light weight f/w @ ~440# either of which could easily be &#177 20#s

[KNIGHTRACE]

I have put some SC's together all steel with 3.8 conversions that are under 2300 lbs. William Knight