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914World.com _ 914World Garage _ New Years Resolution- weight loss
Posted by: ottox914 Jan 3 2005, 07:49 AM
Atkins or South Beach may work on the driver, how about the car? Here are some of the things I have done or will do, with weights listed. Thinking of auto cross here. Also rate your projects, 1-10, 1 being way to easy, 10 being get friends w/experience, block off the weekend, plan on pizza and beer in the garage.
Stock exhaust- 44 lbs
SSI w/bursch- 37lbs
Kerry Hunter- 21lbs
weights by way of GRM 914 series article. I now have the KH system on the car, a savings of 23 lbs. Maybe a 4-5 on the hard to do scale.
remove spair tire. weights will varry, a Mahle 4 bolt with unknown size/brand spair was 32lbs. This is a 1.
mini battery. haven't done this yet, but the standard size battery was 34 lbs in my car, I hear they make 12 pounders in a sealed design. Thats 22 more lbs, again at a difficulty rating of 1.
? how much a gallon of gas is, but to run with 1/4 tank rather than 3/4 would be maybe 5 gals or so, at even a pound per gallon, thats 5 lbs, difficulty of 1.
Took off the fuel vapor recovery tank on top of the gas tank. vented all lines to below the chassis, don't want overflow or fumes in the front trunk. haven't weighted it, guessing at 5 lbs. difficulty of 2.
Hollow front torsion bars, didn't weigh either, but lets guess at 5 lbs each, total of 10lbs. difficulty level 3, to r/r, but you need to mess around w/your corner weights after, which is easy but time comsuming.
revised front suspension to cut 1 5/8 off the strut housings and use 911 konis. this allows front end to be lowered more, and retain more suspension travel. when putting it back togather, used koni snubbers, and left the metal dust shields off. Those were 2 lbs each, I think, don't know about the weight of 1 strut to the other, so I'll stick w/2 lbs per side, total of 4 lbs. difficulty of the dust shield, may be a 3, doing the struts at least a 5, as measuring/cutting/welding required.
All totaled thats 96 lbs!!!!! Most of it was pretty easy. What have other done? Does anyone know how much early doors will save? How about an early interior? How much more for getting rid of the under coating, tar sound insulation, and insulation pad in the engine room? How about light weight alu. calipers, like some wilwoods vs the stock iron units? After market wheels/tires? Keep it coming!
Posted by: URY914 Jan 3 2005, 08:00 AM
Thats a great start!
Wilwoods are not a bolt on or an easy modification. Its been discussed here before. To get them to work would be about a 9 on your scale. 
Wheels and tires are an easy item, but as you go wider you also pick up weight.
Here is an easy one on race day- remove the passenger seat. About a 2 on the scale. Save about 15 pounds 
Remove the radio and speakers- 5 pounds?
Replace the heater boxes with a header- 20 pounds
Paul
Posted by: synthesisdv Jan 3 2005, 08:06 AM
Lexan windows make a huge difference and they are cheap if you cut them yourself. Not sure of the exact weight savings but I'm thinking over 25 lbs not counting the windshield.
Yes they will scratch but if your careful they will last quite a while.
The lexan windshield is expensive and probably not a good idea for a street car.
Posted by: URY914 Jan 3 2005, 08:09 AM
Is the intent to keep it in a stock or prepared class and streetable?
Posted by: synthesisdv Jan 3 2005, 08:14 AM
on thread topic, slight hi-jack
hey paul...
you must have some idea how much your car will weigh now.
What are you thinking your race weight will be?
Posted by: skline Jan 3 2005, 08:24 AM
Gasoline is about 7 pounds per gallon. So if you use 5 gallons less you lose approximately 35 pounds.
Posted by: ottox914 Jan 3 2005, 09:46 AM
Wow, didn't know gas was so heavy. Good thing its priced by the gallon rather than the pound! I knew our seats were light, but had no idea what the real weight was. Think I'll get into the storage shed with a scale, as I have a complete seat and rails.
Paul, I thought you'd be all over this one... 
As far as class, I ran SM2 last season, mostly due to honesty and the BMW front brake, move the 914 fronts to the rear conversion. Suspension tweeks but stock drivetrain. Actually won 1 event, but it was an early season (poor "R" performance for the other SM2's, I was on 2 season old Azenis) against the turbo/supercharged miatas- several of each, turbo MR2's, wild engine swaps... Our SM2 class usually has about 1/2 of the top 10 raw times of the day...
Class plans for the next several seasons would be DSP, now that we have been moved there. De-evolve the brakes. Patiently wait for the KitCarlson EFI, install, and learn how to tune it. Add the turbo sitting in the garage. (Yes, I know, I KNOW, you can't turbo a 914 
) and move back into SM2 with a sorted suspension/tire combo, well tuned 150 whp or so, LSD/shortened 3rd gear tranny, and see how it goes. Class minimums currently are 1900 NA and 2100 turbo/super charged. I know I'll still be down on power with a conservative tune and back yard turbo, but if I have 150 reliable whp I can actually put down, VS one particular supercharged miata w/270 whp (yes, I saw the dyno chart) who knows? Keep the weight loss ideas coming, I'd like to get under 2100 and add a cage and/or the engman (sp) stiffening kit to make up the difference.
Posted by: Joe Ricard Jan 3 2005, 01:23 PM
Get rid of those 73 doors. They are very heavy.
I am intrigued by the guy that put a velcro strap to hold the windows up instead of the winder mechanism. Howz that work?
Getting rid of the head light motors is something I am really going to do on my 70 stripper.
Posted by: Colicious Jan 3 2005, 01:36 PM
carbon fiber hood and trunk. i know for the bmw e30 m3 the hood weighs somewhere around 70-80lbs, and a good carbon fiber hood weighs 12..so you save like 60lbs on that...and same with the trunk
Posted by: nebreitling Jan 3 2005, 01:50 PM
from your avatar, it looks like you've got stock bumpers. if you can live w/out their protection, you can move to fiberglass and save some ###s.
also, how gutted can your interior be?
Posted by: scott thacher Jan 3 2005, 03:58 PM
how much does the engine lid weigh you could take it off at the track or ax course.
Posted by: URY914 Jan 3 2005, 08:19 PM
| QUOTE (synthesisdv @ Jan 3 2005, 06:14 AM) |
| on thread topic, slight hi-jack hey paul... you must have some idea how much your car will weigh now. What are you thinking your race weight will be? |
Maybe 1200 pounds???
Posted by: synthesisdv Jan 3 2005, 08:28 PM
| QUOTE (URY914 @ Jan 3 2005, 09:19 PM) | ||
Maybe 1200 pounds??? |
That's amazing.
Basically the weight of a formula continental or C sport racer. With even a mild motor, that thing will fly.
Posted by: URY914 Jan 3 2005, 08:48 PM
Sorry Dave I miss read your question. Without the body and engine (as shown in the pictures) I'd say 1,100 -1,200. The body is 75-125, and the engine 200-250(???) so I figure the total weight 1500???
Are you going to the PCA Club Race in Feb? I'll be weighing the car on thier scales.
Paul
Posted by: synthesisdv Jan 3 2005, 09:06 PM
| QUOTE (URY914 @ Jan 3 2005, 09:48 PM) |
| Are you going to the PCA Club Race in Feb? I'll be weighing the car on thier scales. |
I thought that sounded tooo light but hey, there aint much there.
I was going to be at Sebring but there is an SCCA vintage race at Moroso in February. Not sure if its the same weekend as the 48hrs but I can't make 2 race weekends in the same month, my wife would change the locks before I got home.
Posted by: URY914 Jan 3 2005, 09:32 PM
I knw what you mean.
Club race is 12th -15th of Feb. Just come over for the day.
Posted by: boxstr Jan 4 2005, 01:00 AM
Front hood= 32.9
Rear hood=27.8
Rear window glass=9.4
Doors Early=22.9(stripped)
Doors Late= 34.6(stripped)
Gas tank= 17.5 (empty)
Heater parts= 10.0
Targa top= 22.1
Bumpers Late front=44.3
Bumpers Late rear= 43.2
Engine lid=15.2
I took these over the weekend. Lots of instant weight loose items.
CLINATKINSLOWCARBDIET
Posted by: Joe Ricard Jan 4 2005, 11:27 AM
| QUOTE (boxstr @ Jan 3 2005, 11:00 PM) |
| Front hood= 32.9 Rear hood=27.8 Rear window glass=9.4 Doors Early=22.9(stripped) Doors Late= 34.6(stripped) Gas tank= 17.5 (empty) Heater parts= 10.0 Targa top= 22.1 Bumpers Late front=44.3 Bumpers Late rear= 43.2 Engine lid=15.2 I took these over the weekend. Lots of instant weight loose items. CLINATKINSLOWCARBDIET |
I will take one of everything in it's lightest version please
I also think I am in the position to go with fiberglass door skins as I have a early set from the stripper.
Paul what ya got? maybe we can talk Rob into bringing me out a pair when he gets his motor.
Posted by: URY914 Jan 4 2005, 11:41 AM
Joe, When is he picking up the engine?
Posted by: Joe Ricard Jan 4 2005, 11:42 AM
Paul you have mail
Posted by: URY914 Jan 4 2005, 11:44 AM
PM me, I'm at work.
Posted by: ottox914 Jan 4 2005, 03:15 PM
Boxstr- thanks for the great info from the camp. I went to the GT-racing site, and found approx weights for FG lids, 12 front, 11 rear, which would make for a good savings from steel.
Anyone with weights on the bumpers, to ditch the steel and go with the glass?
There were a couple ?'s about class rules. While the car is in DSP, it needs all steel body, so no glass lids or bumpers, but can update/back date, so early doors would be o.k., as would interior.
Speaking of early and late 914's, in the current Panorama, they have a 914 special that lists the early cars weight at: 1984 for the 4 cyl, 2075 for the 6 cyl, 2140 for the 73/74's, and 2205 for the 75/76's. Anyone know specifically what the differences are and how much LBS they add?
The 3 I'm aware of for the "early" to 73/73 would be the additional bracing in the front trunk/spair tire area, adjustable passinger seat, and doors, the steel beam and different regulator hardware. Does all that add up to 156lbs?
Back to class rules again, when the turbo goes on, and I return to SM2, front hood could be glass, not sure on the bumpers, as they can be "modded for tire clearance", but no mention is made about replacement. The car needs all "roadgoing equipment as from the factory", such as lights, wipers, interior, heater... Although headers are allowed and removal of the heater for the header install is o.k. Minimum weight for forced induction is 2100 anyway, and I should be able to easily hit that this spring just with the suggestions already presented.
Rambling on, anyone with an idea of how much undercoating/tar sound insulation adds to our cars? I expect it would varry car to car, but, anyone chip it out and weigh the bits?
Thanks for the ideas and help, and keep'em coming!!
Posted by: nebreitling Jan 4 2005, 03:52 PM
| QUOTE (ottox914 @ Jan 4 2005, 01:15 PM) |
| Rambling on, anyone with an idea of how much undercoating/tar sound insulation adds to our cars? I expect it would varry car to car, but, anyone chip it out and weigh the bits? |
i've heard from people far more knowledgeable that I that removing undercoating and interior tar can save 40 lbs or so.
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