BC

IN total, I have removed from the front of the car:

-The little brackets, etc from the front area infront of the rad. - Couple pounds.
- The bumper has been replaced by swiss cheese and euro-bumper "shocks" though they are just pipes. - Saved a good turkey or two - maybe 15 pounds or less
- The entire headlight assembly and all related welded brackets- Something between 20 and 30 pounds I think.
- Headlight washing system - a couple pounds I guess.

The bumper shocks are HEAVY.
The bumper, though, is a necessity. You need to see a 928 with no fenders or front at all. There is no structure between the two rail sides, and the rail sides themselves don't do alot above where the suspenion is anyway. That bumper connects that "box" which is the firewall, sides, and front. You would need a strong bar between the two raisl right at the front if you didn't have the bumper I would think.


The rear is a bit more complex, as too much weight removed is too much frontal bias.

This is why I have focused on the front of the car.

Anyone else have any crazy ideas?

I know. I weight 240 and could be about 210. Thats 30lbs right there.

m21sniper

Say, i know this is a weight savings thread...but does anyone know where i can get some officially approved rennlist pedal covers for my 928?

Hehehehehe................

On topic: Did you lose the air pump assy and a/c assy?
That saves a whole bunch of weight, easily over 50lbs.

Euros dont have bumpers do they? What do they use to square off the 'box' at the front of the car in lieu of the US bumpers?

BC

Nice.

I'm shooting for under 3000 pounds fully dressed. Maybe not with ME in the car, but...

Not without sound deadening though. I have that throughout the cabin - raamat - but I took all the tar stuff off every panel.

I am thinking about NOT replacing the rear quarters. No rear seats - just carpet.

Rear hatch glass can be polycarbonate. Rear quarters are already very light. Side windows are heavy, but I'm not sure plastic will hold up.

Brakes are big and heavy but we need those.

heinrich

Brendan, I'd question the "bumper forms a box" theory, because (btdt) the bumper levitates on the shocks and is not at all mounted. I doubt there is a single pound of rigidity that it offers.

BC

Euros do have bumpers that I know of. Just not the shocks. The bumper on the early cars acts as a support for the bumper cover as well.

I need AC. I'm in Socal and even with tinte windows I sweat in traffic. The AC compressor is the biggest problem. The line weights are negligable, as is the exhanger in front. Hell, I ADDED weight with the Devek Radiator as a choice.

Nothing is on yet, not even the glass, so my options are open.

The HVAC unit is plastic - good - and the heater core is not heavy. The AC core IS though - but I need that.

All the wiring is gone. It is replaced by aftermarket GM like stuff. Thats dozens of pounds I think.

The rear bumper will be swiss cheese as well.

m21sniper

That's EXACTLY what i wanted to hear.

I think i'm right around 3000lbs now, maybe slightly less.

Brendan: Did you redo your factory exhaust system? I saved over 50lbs on the exhaust alone(3" no cat Borla XR-1 custom single). The seats are boat anchors too. I saved easily 75+lbs by replacing those with lightweight(19lb each) upholstered racing seats. Saved 29 lbs by changing to a Miata battery(13lbs vs 42lbs OEM- i actually have a more expensive 14lb drycell though) Another probably 60+ for the A/C+Air pump assys, rear wiper arm and motor is another 5, got rid of all kinds of brackets, etc. all over the underside of the car/under the hood- at least 10lbs worth. Timing covers are another couple pounds, lost the stock clutch fan, probably another 4 or 5 lbs(i swapped out the factory electric with a very powerful lightweight electric that handles all cooling now at less overall weight than the old clutch/elec. hybrid). And i also lost all the washer cleaning stuff too, maybe 5lbs total there for both. I'm sure i'm forgetting stuff. I have yanked a ton of weight off the car, and i always forget about something when i do one of these lists, lol.

I want to still get rid of the back seats(but need carpeting to tastefully patch the hole before i can proceed) and lose the bumper assys(front and rear).

I want 2850lbs with no driver and a quarter tank of gas. I think that losing the bumpers and seats along with the few other 'easy' things i can remove should get me very, very close.

BC

You are probably right. It does control side to side though, and twist would be reduced.

My point was that there is not alot of structure ahead of the firewall. Only that lower rail.

The front K-member isn't that heavy even.

I think the body is just really heavy.

PorKen

Pics of the euro 'impact pipe's?

blau928

Brendan,

In a little bit, I may have some machined Aluminum pieces that you might want to bolt to your engine to make it heavier...!


LOL..!

I have a Recaro SPG in place of the 12 way pws seats that saves quite a few pounds.. Have you tried that in addition to your other mods..?

I think with diligence, you can get it down to 3,000lbs without much issue...

HTH,

m21sniper

It's the engine. The Porsche V-8 is an extremely heavy beast.

BC

The racing seats are a done deal. I had them in my 89 before this. They are Corba seats - about 14lbs each, and comfy.

The rear wiper is gone.

Clutch fan will be gone - S4 engine in the 78. Fans will be four small ones bracketed to the radiator.

I think the car can be made still-comfortable and not too loud and still be lighter then 3000 pounds.

The exhaust will be Devek LII headers into an X-pipe into duals all the way back. Maybe two or so mufflers.

The new 997 turbo is 3450.

Blau - I'm always a fan of machined aluminum.

Even on the engine, I will not have all the wires that are there normally. The alternator should weigh less if Sharkskin works his issues out.

I bought a lightweight high-torque starter - that about 7 pounds right there.

The 78 lower bell housing saves 2lbs.


To keep it all even I will add the methanol-water pump at the back of the car, and if I add an intercooler the pump will go back there. The water/meth tank goes back there as well.

BC

They were on ebay. You didn't see them? I was the only bidder. 35 bucks for both.

BC

Something like 650 dressed.

marton

the wing mirrors are incredibly heavy, weigh them! get plastic ones.
take off the metal "anti-theft" plates in the doors
throw away the eletric window motors and find another solution.
throw away the spare wheel

Marton

BC

Mirrors were an issue with me. At the time I did not feel it was a good money-weight ratio, so I painted the metal ones body color with the plastic and everything. When I have the funds I will switch to manual aero mirors.

The anti theft plates are already in the garbage.

Window motors - ah - well...

Spare? What Spare?