Ever wonder what your drivetrain weighs?

[Tyson Schmidt]

The LF is the starter, the RF is the mag case 915 non-lsd trans, and the two rears are the engine with clutch and flywheel and complete intake and exhaust. My short-stroke 2.5 with MFI.

[Brant]

for clarification...

the picture is hard for me to read
do the RF and RR say: 101/198?

thanks
brant

[Neilk]

This should help

[Tyson Schmidt]

Originally posted by Brant
for clarification...

the picture is hard for me to read
do the RF and RR say: 101/198?

thanks
brant

Yes.

The starter weighs 15#, the trans weighs 101# (dry) and the complete engine with clutch and flywheel weigh 391#

If you subtract 25# for the heavy stock muffler, and 25# for the clutch/flywheel, that's a 341# complete 911 engine!

I wonder what a VW type-IV motor weighs. Probably not much less.

[Early_S_Man]

Tyson,

So ... how did you manage to lose 18 lbs off the 915??? It is listed at 119 lbs in the '72 - '73 spec book ... or, maybe that figure was for the 915/06 with oil pump and squirter system???

OK, now I remember ... full of oil, and starter was mounted to the 915!

[Tyson Schmidt]

Originally posted by Early_S_Man
Tyson,

So ... how did you manage to lose 18 lbs off the 915??? It is listed at 119 lbs in the '72 - '73 spec book ... or, maybe that figure was for the 915/06 with oil pump and squirter system???

Warren, I bet they included the starter in that figure. Then there's the weight of the oil.

[Don Plumley]

Maybe Tangerina has had Lipo since moving into LA...

[GDSOB]

Any details on the 2.5 short stroke w/MFI? I tried searching but all I got was short shift kits...

[Tyson Schmidt]

Originally posted by GDSOB
Any details on the 2.5 short stroke w/MFI? I tried searching but all I got was short shift kits...

I used a '77 7R case, shuffle-pinned and line-bored back to standard. 2.2S crank and rods. JE pistons, 90mm. 10/1 CR. S cams and ports. Early rocker arms. (early rockers are forged, so they are lighter than the cast, and they have a slightly higher rocker ratio.) Fully balanced, etc. I have the rev limit at 7300, but the motor will handle 8300 with some racing springs and retainers.

[Brant]

Originally posted by Tyson Schmidt
I wonder what a VW type-IV motor weighs. Probably not much less. [/B]

Tyson... Awesome thread!

so these numbers are no where near as accurate as yours... but the numbers we have been throwing around forever were:

type IV motor 250lbs
type 914(901) trans 75lbs
and -6 early motors 400lbs.

seems that your experiments somewhat validates the 400 figure.
with flywheel your talking about 366... so maybe the 400 figure was with mufler and all included... (do you agree that my aluminum block would be roughly +20lbs? or 388lbs?)

(I can't tell you if the 250 figure did or did not include all those components)

awesome...
thanks again.
brant

[Tyson Schmidt]

Brant, the mag case saved 24# over the sandcast aluminum case. Then from there, it all depends on what cylinders you have, chainboxes, cam covers, etc.

I'm running Nikasil 90mm cylinders that weigh 15# (All 6 together) less than the cast iron, and 12.5# less than the biral.

[Brant]

Tyson,

will you do me a favor?
will you guess-timate my motor weight for me, compaired to a mag case motor like yours?.....


(I had always thought my motor was around 20lbs extra compaired to a mag motor, but never even thought about the weight of the cylinders, chainboxes, or cam covers..... now I'm thinking my motor is probably closer to 40lbs extra instead of 20)

here is my motor:
1966 aluminum sand cast block with 1966 chainboxes and cam covers. And stock 1967S pistons, cylinders, counterweighted crank, rockers, cams, IDS carbs, etc... (basically a stock 67S motor)

(oh.. it probably makes no difference, but a 2.7 oil pump and 2.2 rods)

If your motor is 341lbs and you add the aluminum parts on mine what do you think it would weigh in at without the flywheel/clutch?

thanks for your time sir!
(sorry for the tedious question but I get off on this weight stuff)

brant

[dd74]

Originally posted by Brant
(do you agree that my aluminum block would be roughly +20lbs? or 388lbs?)

FWIW, I've talked with shops who have shipped 2.7 and 3.0 cases, and upon weighing both, have said the 3.0 case weighs roughly +20 pounds over the 2.7.

[Brant]

dd74

there may or may not be a difference between the 3.0 aluminum complete.. and the early 2.0 aluminum complete. I think the casting method was different so maybe?... plus, I've shipped about 3 motors myself and think the packaging and crating technique could cause a 30lb difference right there depending on the type of wood and structure. So really interested in the input of motor only.

I had always heard 20 also, but I trust tyson and just plain want to hear another data point to see if it confirms it or differs.

Brant
(who is wondering if he could get his metal racecar down to 1810 wet with a mag -6?)

[RarlyL8]

A fully dressed California spec '78 930 engine weighs 529 pounds - ALONE.
Add-ons can pack on the weight in a hurry!

[Brant]

bump to get more input

[dd74]

Originally posted by Brant
bump to get more input

Call TLG in N. Hollywood. Talk to Tony. He's one person who comes to mind who told me of the weight difference.

[Tyson Schmidt]

Yes, there is a difference between the early sand-cast aluminum case and the 930 case that all 3.0/3.2 cars use. The early sandcast is a just a tad heavier.

The Factory claimed 24# weight savings going with mag over the sand-cast aluminum.


To answer Brant's question, you can add:

24# case

7# chainhousings/covers

0# cam covers (mine are Carrera aluminum, so no difference)

12.5# cast iron lined cylinders


Total 43.5


Now you can subtract roughly 12# for carbs versus MFI So:


43.5-12.5= 31#


So you're in the 370# neighborhood, without clutch/flywheel or muffler.


The reason I left off the muffler weight in my previous post is that many people run megaphones at the track, saving 20# of muffler weight.

[randywebb]

Thx Tyson -- do you have oil pump wt. data over the years?

[Brant]

Thanks Tyson...
love the info..
love the thread..
love this board...


brant