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The Corvair weight-loss program.
Posted by: Brett Wall ()
Date: March 21, 2007 11:14AM

Which is the lighter coupe... early or late?

How light can a Corvair get while retaining a near-stock appearance?

I have this insane desire to build a lightweight Corvair with a mid-engine layout. I want to use a Corvair engine, but with a modern 5 or 6-speed transaxle.

Maybe a Subaru transaxle, or Porsche boxster, r the 944 Porsche is a quasi-transaxle.

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Re: The Corvair weight-loss program.
Posted by: carolinefx ()
Date: March 21, 2007 11:29AM

Early coupe is lighter - by almost 200 lbs if I remember correctly.

Go with Fiberglass hood, doors, decklid and there's another couple hundred gone

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Re: The Corvair weight-loss program.
Posted by: MattNall ()
Date: March 21, 2007 11:40AM

Racers get the LM's down to 1850 with extensive use of FG....but this is a gutted car....full cage....

As Tommy or Zac noted...lots of weight can be removed by just cutting away things....

Then remove all glass except windshield....

Esslinger Racing in SoCal a few years back had a tubeframed EM....only the drivers door worked....this was a drag car....but the lightening was done smart.! Little cost to convert the body into a Skin!

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Re: The Corvair weight-loss program.
Posted by: "UNSAFE" ()
Date: March 21, 2007 12:02PM


The biggest weight reduction per dollar spent is replacing the stock seats with something from a rice burner or aftermaket.

Another bargain per LB saved is the aftermarket gear reduction starter.

I have never weighed my car but it must be more than 200 lbs lighter than stock.

I have carbon fiber rear deck lid, fiberglass bumpers, lexan rear window, the X-bracing under the hood and and the hood springs have been removed, light starter, light flywheel and pressure plate, light Subaru front seats and a lightened shortened back seat , a replacement windshield saves about 6 LBs .I swiss cheesed some things like the motor mount and lastly, I left out a lot of bolts ! ggg

It seems like some weight could be removed from the window regulators and still retain side glass.

What about helium balloons in the trunk ????????

"UNSAFE"
Kevin Willson
65 Monza
Juneau. Alaska

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Re: The Corvair weight-loss program.
Posted by: Woodkeeth ()
Date: March 21, 2007 01:33PM

Brett you're a man after my own heart. Take lots o pics.

Keith.

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Re: The Corvair weight-loss program.
Posted by: Darren ()
Date: March 21, 2007 01:47PM

Fill the tires with helium LOL

Darren
66 Monza SS Convertible
140HP 4 Speed
Colorado Springs, CO
[www.flickr.com]

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Re: The Corvair weight-loss program.
Posted by: zac ()
Date: March 21, 2007 07:57PM

>light Subaru front seats

Not so sure about that. I have the same seats as you in my Spyder and a similar set in my LM coupe. The stock seats, according to my scale, weighed 43 lbs each. The Subi seats weighed 39lbs each and that was after I took off the headrest and replaced it with a shorter metal rod welded to the frame. This was when I was having them reupholstered and wanted to change the look a bit. I don't think I removed move than a pound or two off of the seats, though. The seats in my LM came out of a late model Mitsu Eclipse and weighed 41lbs each. All were weighed on the same scale at the same time. This fits pretty well with new MINI seats that weigh 42-44lbs each, depending on whether sport seats or base model. IIRC, the stock fold-down back seat weighed 70lbs! That's not including the seat bottom, which was WAY lighter.


Most new car seats _feel_ a bunch lighter but the scale doesn't lie. I was suprised, anyways. I would think most newish factory reclining seats are all going to weigh about the same. There are some real lightweight racing seats (non-reclining) out there but plan on spending a few bucks for anything above the basic "clubman" type seats. Which are very good by the way smiling smiley.

My LM coupe weighs in at 2365lbs with a 1/4 tank of gas. Certified scales at my work make it easy to track any changes smiling smiley Lots of little changes add up. Kevin's right about the starter, flywheel,etc. I think if you wanted to sacrifice some comfort, you could get it down to 2150-2200 without too much trouble or money. I'm still going to purge a few things off of the car, but I was also trying to move weight around not just jettison it completely. Since this is going to be my wife's car I'm leaving in a few things I could do without-heater, reclining seats, etc.


Zac

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Re: The Corvair weight-loss program.
Posted by: Tommy ()
Date: March 21, 2007 08:10PM

Darren Wrote:
-------------------------------------------------------
> Fill the tires with helium LOL

try filling your tires with pure nitrogen! tires hot or cold will be the same pressure.

purge completely and fill completely

no more hot / cold guess work or needed to re-check your tires at the track



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Re: The Corvair weight-loss program.
Posted by: "UNSAFE" ()
Date: March 21, 2007 08:16PM


Zac, I am curious now and will weigh one of my sube seats soon as I plan to recover them in vinyl to match the rest of the interior.

Mine were out of a Subaru XT which is the little wedge shaped 2 door sports car. It sure didn't feel like 39 lbs but like you said, the scale doesn't lie.

I definitely saved a bunch of weight by replacing the rear seat seatback with my cut down homemade version. It no longer folds down but it only weighs about ten lbs.

Argh, if it wasn't so cold and rainy outside I'd yank one out and weigh it now to satisfy my curiosity.

OT. I live in an avalanche zone subdivison of about 20 homes. The city is warning us all that an avalanche is probably and that we should evacuate and seek shelter at a local school.
If you don't hear from me again, you'll know what happened ! Argh.

I lived through a bad one as a child in the early sixtys. I lived on the street right above this photo.
They said that the wind created by the avalanche coming down the mountain is what broke the light pole. Note FC.


"UNSAFE"
Kevin Willson
65 Monza
Juneau. Alaska



Edited 1 time(s). Last edit at 03/21/2007 08:20PM by "UNSAFE".

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Re: The Corvair Avalanche Model for 2007!
Posted by: MattNall ()
Date: March 21, 2007 08:26PM

Best of luck! or start shoveling fast!!! GGG

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Re: The Corvair weight-loss program.
Posted by: zac ()
Date: March 21, 2007 10:01PM

Yeah, good luck Kevin. My seats came from the same Subi XT as yours. Well, not THE same car, cause then we would be sharing the seats. I think I even had the same upholstery. Mine were gray fabric inserts w/square "dots" in them. Very 80's smiling smiley My back seat is now just the factory bottom, like 15lbs IIRC, and a piece of 1/4" plywood w/thin closed-cell foam and lightweight (read cheap) carpet over top, 10-15lbs max. Eventually it'll all get recovered.

I'm going for an even 2300lbs by the time I'm done, still have a few tricks left to try.

Zac

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Re: The Corvair weight-loss program.
Posted by: freeulster ()
Date: March 23, 2007 01:59AM

One of the best weight reduction tips is to not pick up any extra cones.gggg

sorry Kevin, I couldn't help myself.

Kent Donnelly
Living in sunny Brigantine Beach NJ
64 Vert
Philadelphia Corvair Assoc and CORSA
"EM's are faster than LM's because we don't have all those extra lug nuts weighting us down"

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Re: The Corvair weight-loss program.
Posted by: Beach House Guru ()
Date: January 13, 2022 12:52PM

Hi Kevin,

Interested in a couple of things you mentioned

Fiberglass bumpers where did your find them

Carbon Fiber Rear Deck lid - where did it come from

There is so much neat stuff out there that no-one seems to advertise

Thanks for the help!

"Murph"

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Re: The Corvair weight-loss program.
Posted by: isucorvair ()
Date: January 13, 2022 12:56PM

Murph-

This is a pretty old thread. Not sure Kevin hangs around here much more - you may PM him, otherwise, his former car is owned by someone else on here.


Fiberglass bumpers and Carbon Fiber Lids, there are some making them, but I'm not sure who is actually making them to sell.


My FSP Solo Corvair weighs 2400
My "new" CP Solo Corvair weighs 1860.

Both late coupes.


Eric P.
DeWitt, IA

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Re: The Corvair weight-loss program.
Posted by: Seth Emerson ()
Date: January 13, 2022 02:09PM

The Colin Chapman program of weight reduction. Cut stuff off, one piece at a time. When the chassis collapses, put that one piece back on. And there you go!

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Re: The Corvair weight-loss program.
Posted by: 66vairman ()
Date: January 13, 2022 03:08PM

Tommy Wrote:
-------------------------------------------------------
> Darren Wrote:
> -------------------------------------------------------
> > Fill the tires with helium LOL
>
> try filling your tires with pure nitrogen! tires hot or cold will be the same pressure.
>
> purge completely and fill completely
>
> no more hot / cold guess work or needed to re-check your tires at the track
> >

Actually the air we breath is about 78% nitrogen. So pure nitrogen isn't much different in tires regarding pressure. However --- DRY NITROGEN doesn't change pressure as much as nitrogen the contains moisture as the temperature changes.

If you use nitrogen in your tires make sure it's DRY industrial grade nitrogen. Same when purging air conditioning systems.

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Re: The Corvair weight-loss program.
Posted by: 63ConDan ()
Date: January 13, 2022 05:13PM

yes what what was the ratio: 10 LB weight reduction equal to 1 HP increase.

Dan Central MN
1968 Convert

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Re: The Corvair weight-loss program.
Posted by: v8vair ()
Date: January 13, 2022 05:49PM

You can get an early model way lighter than a late pretty easy compared to a late.
I would estimate 300 lbs lighter .

1965 Crown V8 Racer
1964 Bill Thomas Monza Replica Racer
1964 Spyder Street Car
1979 Mazda RX7

Mike Levine

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Re: The Corvair weight-loss program.
Posted by: Vairismo ()
Date: January 13, 2022 09:19PM

I have a set of fiberglass bumpers for a 65-69. They may need some finishing.
Send a PM if interested.

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Re: The Corvair weight-loss program.
Posted by: jbyenko77 ()
Date: January 14, 2022 08:37AM

Hi
I have the molds for fiberglass bumpers and hood, doors,air dam, fender flares, rear cove
And possibly bumpers stashed ,I’ll check the barn
But fiberglass work in Southern California is not cheap

I also had two sets of polycarbonate windows made by an aircraft window manufacturer (all eight pieces) and now am only planning to use one set

PM me if interested

Jeff Ballard
Camarillo CA

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