Diet 1972 911T

[Hoss3.0]

I had my car weighed today to see if the mods/deletions I have done have added up to much weight savings. On a certified scale with 1/2 tank of gas, no driver/passengers it weighed 2240 Lbs. From what I can find it would have left the factory weighing in the range of 2425 Lbs. Not bad so far!!!

[berettafan]

that sounds like a very nice number!!!

[daepp]

What mods have you done?

[goldsc78258]

I did and R look car out of a 1971 and my final weight was 2073#

[Hoss3.0]

So far most of what I've done has been removal of non vital parts with a focus on street drivability. I have removed the complete AC system, front trunk carpeting, cardboard cover in front trunk, arm rests, heat exchangers, sound deadening, knee pads, stereo, speakers and all hood supports. I installed new (lighter weight) door panels, floor carpeting and steering wheel (prototypo style). The car is still very comfortable for the driving i do here in Canada. Without heat I will be limited to how long I can drive before it snows but i don't drive it in winter so... Without AC it gets a little hot but you pick your times for driving. The heat exchanger delete made a huge difference in engine temp. as did the heater block off plates i fabbed. I am looking for a SWB one piece knee pad to go in as i like the look and think the weight gain/loss is insignificant when you consider the ashtray delete for this. Lightweight carpets all around, single battery, no spare, sport seats (yeah right!) and K&N filter housings are on my list of things to do.
As one of my friends commented when I explained my weight loss program..."Do you want it to fly???"

[Christien]

Can you feel the difference the 200 lbs lost makes? I'm curious as to whether it's worth it or not. My 911 is my daily driver in the summer, so it sees a lot of street, family, errands and track duties. Yesterday she spent the day at Mosport, this morning I was out doing errands with my daughter in the child seat in the rear, with track tires the only difference (helmet's still in the back!). So retaining comfort is, to a degree, important to me. Heat is a necessity, as I drive it until the salt trucks come out, and she's back on the road as soon as the salt's washed away. But if there's that big of a difference, I might be willing to sacrifice some of the comforts.

BTW, I had a ride around Mosport yesterday in a 67 911S. Stock, except for suspension and weight reduction. I've NEVER had a ride like that in my life, and that includes rides around that track in cup cars, a Ferrari 355 challenge (factory race car), GT3s, etc. I was literally in tears by the end, from exhilaration. So I'm aware of the benefits of serious weight reduction!

[BK911]

This is how I see it:

If you started with 150 hp in a 2400# car, removing 200# is the same as adding 13.6 hp. At least the way I do the math. Basically comparing the new power / weight ratio to the old weight.

150/2200 = x/2400; x=163.6

[Christien]

Hmm, I think you're being generous with 150 hp. If memory serves, my ROW 72T with Zenith carbs was rated 135.

[berettafan]

Christien please tell more!

What kinda suspension work had been done? any idea what the weight was?

[Christien]

I don't know, unfortunately! I only asked him briefly as I was strapping into the 5-point what was stock and what wasn't. He said it was the original 2.0 engine, suspension had been upgraded, then I was whisked off to heaven and didn't have time to remark on anything except his absolute domination over the laws of physics.

[Hoss3.0]

It's hard to tell the difference because it wasn't an all at once weight loss. Seat of the pants tells me it has quicker response. As for the heat and air...I don't miss it at all. I drive into December and wait for the 1st snowfall before putting it away and get it out in March. I bundle up when it's cold but find the radiant heat from the engine is a help. So far so good. The problem I have now is my car sits way too high. Hence the weigh in today.

[Hoss3.0]

PS, I certainly notice when my kids are on board. They are 4 and 6 so combined they might weigh 100 Lbs. It's obvious!!!!

[berettafan]

ya know that is a great way of looking at it and we can all try it for free.

just take a 140lb passenger for a ride and compare the performance. it seems if you pull 140lbs from the car itself your performance gain will be equal to the decrease you felt with the passenger. right?

my car is definitely not the same with a passenger in it.

[Zeke]

Originally Posted by Hoss3.0

PS, I certainly notice when my kids are on board. They are 4 and 6 so combined they might weigh 100 Lbs. It's obvious!!!!

No kidding. Taking an adult passenger really changed my '71.

[Hoss3.0]

So what are the rough HP estimates for a ROW '72 T 2.4 with Webers (40 IDAs). Do the K&N style filters and housings add any performance gains? What about weight savings compared to the huge stock air box? Oh yeah, and I have a dual in/out sport muffler.

[berettafan]

hoss got any video of your car? i too have a weber'd 2.4 but have the 1 out muffler. been wondering what a 2 out would sound like on it even though i'm fairly certain i wouldn't get to hear it (gotta love that intake howl!)

[RWebb]

hence the bias against fat girlfriends...

[Christien]

I would guess that the only things you listed there that will make a real hp difference are the Webers and the 2 out muffler. Better air flow through the K&Ns should indeed aid hp, but I wouldn't think it'd be more than 1 or 2. As for weight savings, the stock box only weighs what, 5 lbs? The only specs I've seen are factory specs, which of course don't include any of these (I believe 72s only came with Zeniths for ROW and MFI for US, with Webers as an option) so I couldn't offer a guess on the hp differences.

So forget #s on paper - drop by and we'll compare! My car has no weight reduction (damn factory Recaro sport seat ways a ton!) and probably has 10 lbs of kid toys and dog hair! Zeniths that can only be tuned so well. And on the plus side, Bursch sport exhaust (which I actually believe robbed me of a few hp, rather than the supposed 5-7 hp gain), MSD ignition and no fear of the redline

[johnsjmc]

I have a stock weight 1980 SC with about a 300 hp 3.6 It doesn,t scare me at all .I,ve had a 1976 Turbo and driven others .I do remember being REALLY impressed with a short ride in a MFI early 72 or 3 Euro spec S car in 1975. I was 24 at the time and a fairly experienced driver.My best friend at the time had a 1969 T with a 1967 2.0 S motor in it. We scrapped the 7 year old S car because it had a rusted out front pan.( What a shame looking back) The MFI car was much faster .I think porsche hp numbers were conservative in those days as the cars were known to be fast and weren,t that much lighter than alot of stuff before the battering ram bumper years.A Datsun 240Z was about the same weight as a 911in those days and had 150 hp rating but wasn,t nearly as fast as a T car
Hoss3.0. what colour is your car? I live just west of London and will keep my eyes open.

[Hoss3.0]

Yes Chris that would be a good way to go. Run them one after the other. Doesn't your car have flares as well? What about the duck tail, heavier or lighter than stock.? I love the look on flared cars but I'm not sure yet how it would look on my narrow body. I also really like the whole "R" look or T/R.