Winter project under way. Updated 01/07 - Page 3 - Rennlist - Porsche Discussion Forums

Notices

Winter project under way. Updated 01/07

 
Old 01-05-2009, 02:30 PM
  #31  
porschefig
User
 
porschefig's Avatar
 
Join Date: Sep 2003
Location: Bremerton, WA
Posts: 1,745
Default

Do you think this winters work will be enough to offset the weight of a cage? Still going to be under 2300 lbs next season?

Awesome work as always!
porschefig is offline  
Old 01-05-2009, 03:06 PM
  #32  
MPD47
The Carnage King
Rennlist Member
 
MPD47's Avatar
 
Join Date: Oct 2003
Posts: 7,476
Default



Man, that photo makes me feel like I'm having Deja Vu!

Keep us updated
MPD47 is offline  
Old 01-05-2009, 04:42 PM
  #33  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Originally Posted by DanR View Post
wow that fender is a lot of work for 22 lbs saving
Indeed it truly is. But I've removed so much of everything else, every pound further is increasingly difficult. But these fenders do serve another purpose. To fit 315-345 tires in the rear.

But this isn't the half of it. 20 more lbs of metal off the rear is getting removed. swapping out steel roof for fiberglass one. Will be removing another 70lbs off the nose. Cage should be offset with about 20-30lbs lighter than 2300 even with cage. But truly time will tell.
95ONE is offline  
Old 01-08-2009, 02:29 AM
  #34  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Here are a few more pics of what I did today. Rear metal part weighed in at 33lbs.




Last edited by 95ONE; 01-08-2009 at 04:49 PM.
95ONE is offline  
Old 01-08-2009, 03:34 AM
  #35  
HansB
User
 
HansB's Avatar
 
Join Date: Aug 2002
Location: Netherlands
Posts: 589
Default

Bruce, interesting project. Makes me want to buy another tub and do all the cutting, grinding and sawing again. You never quite get it right the first time.

Looking at my car with cage again now, there are a number of areas where the cage really takes over the strenght of the chassis. Once you start fitting the cage in, you notice areas where you would want reinforcement, or could take stuff away.

Is your cage taking care of the rear suspension pickup points? Are you going to delete the support bracket of the gearbox? I would. What are you going to do about the rear ride height and the height of the gearbox? I have lots of troubles with the angle of the driveshafts, eating away the CV joints.

How do you keep your rear rugged enough? If you are going to race the car, you will have people running into you? Also I notice that the shape of the rear is defined by the remainder of the hatch support. Are you going to keep this?
HansB is offline  
Old 01-08-2009, 07:09 AM
  #36  
gt37vgt
Super User
 
Join Date: May 2006
Location: Melbourne
Posts: 3,481
Default

another tub??? Hans your sick... perhaps you need a trip to Australia?
have your got the X brace across the underside? to reduce floor shuffle ?
gt37vgt is offline  
Old 01-08-2009, 12:33 PM
  #37  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Originally Posted by HansB View Post
Bruce, interesting project. Makes me want to buy another tub and do all the cutting, grinding and sawing again. You never quite get it right the first time.

Looking at my car with cage again now, there are a number of areas where the cage really takes over the strenght of the chassis. Once you start fitting the cage in, you notice areas where you would want reinforcement, or could take stuff away.

Is your cage taking care of the rear suspension pickup points? Are you going to delete the support bracket of the gearbox? I would. What are you going to do about the rear ride height and the height of the gearbox? I have lots of troubles with the angle of the driveshafts, eating away the CV joints.

How do you keep your rear rugged enough? If you are going to race the car, you will have people running into you? Also I notice that the shape of the rear is defined by the remainder of the hatch support. Are you going to keep this?

Hans, that is spoken like a man with real experience. All your questions are those we've run into with other cars. We've overbuilt many of the cages adding un-neccessary weight. and then found some weak points later. I don't think I'll get even close to 100% correct. But I will definitely try. Excellent eye on the pics.
Yes. I'm getting rid of the brace. I am adding about 15lbs of steel back to the rear as a bumper bar / brace beam to take care of the strength issue you asked about.
It does sound like you've run into some 944 specific issues I could learn from.

The Cage is taking care of the suspension point strength that I cut away. - and the metal that was there really wasn't keeping it near as strong as the cage will. I will have a few well placed 1" chromolly bars to to final strengthening of the cage/body structure. - WRC Rally style stuff, but not quite as extreme. If you look up some Rally cages you will see tons of interesting placements of the tubes.

on another note. I'm adding the expanding foam into the frame once I am done welding which will increase the stiffness of the stock frame a ridiculous amount. (changed plans. not doing this)

Yes, I kept the rear hatch as something to define where things need to go, and yes, I'm actually going to keep it in place. The steel braces are temporary though and an aluminum set will go in it's place. Then very thin aluminum will finish off the enclosure. Bead rolled for strength.

Last edited by 95ONE; 08-06-2012 at 09:19 PM.
95ONE is offline  
Old 01-08-2009, 12:46 PM
  #38  
blown 944
Super User
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Default

ummm...

you are making me feel trivial.

hats off..you are really knocking it out of the park
blown 944 is offline  
Old 01-08-2009, 01:03 PM
  #39  
DanR
Super User
 
Join Date: Jun 2007
Posts: 3,456
Default

You have some ***** and bravery with a cutting tool, I will give you that. Looks really impressive!
DanR is offline  
Old 01-08-2009, 02:38 PM
  #40  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Originally Posted by DanR View Post
You have some ***** and bravery with a cutting tool, I will give you that. Looks really impressive!
That holds more truth than you know. cutting is fast and easy. Well, knowing where to cut helps. But its the putting it together properly with a slight artistic touch is where all the work and time are. And a main reason so many projects don't finish. I will basically be doing the cage twice. once with cheaper steel exhaust pipe with lots of build up and tear down. Then the final in chromoly. If I screw up just two bends, I could be throwing away around $100. I'm sure another reason you don't see many TIG welded chromoly cages. Min cost around $2700.

EDIT: Class rules in NASA doesn't allow for smaller tubing.. no weight savings.. So keeping with DOM steel. unfortunately

Last edited by 95ONE; 09-13-2009 at 01:39 AM.
95ONE is offline  
Old 01-08-2009, 03:55 PM
  #41  
Ian Carr
That Guy
Rennlist Member
 
Ian Carr's Avatar
 
Join Date: Sep 2004
Location: Norwalk, CT
Posts: 6,650
Default

love the laser blue V70R in the back ground LOL

looks great man. I have been debating really hard if i should go the same route. I really want to pull the whole front end off like you did, custom tube frame supports, dry sump the motor and mount it verticle. make a custom header with the turbo right there.. whole 9 yards

Look forward to updates.. hope this doesn't fall of like GUNs project did (YEAH I AM CALLING YOU OUT GUNS) hahahah
Ian Carr is offline  
Old 01-08-2009, 04:14 PM
  #42  
A.Wayne
Formula One Spin Doctor
Rennlist Member
 
A.Wayne's Avatar
 
Join Date: Jan 2005
Location: RPM Central
Posts: 20,448
Default

Originally Posted by 95ONE View Post
Here are a few more pics of what I did today. Rear metal part weighed in at 33lbs.



Hey , what happened to your car ? the back is missing ...........................


Anyway , i would have thought it best to have a cage in place or the chassis jigged before cutting stuff away .......................
A.Wayne is offline  
Old 01-08-2009, 04:39 PM
  #43  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Balancing act. But it seems there is still plenty of steel left in the A,B, and C pillars to keep it straight. Besides the fact that there is nothing in the car left but the frame itself. And I am leaving some metal in there until the Cage is installed. Wheel wells and some lower skirting is still to be removed.

The complete front and rear of the car are last on the build sheet. The cage is the next step. I've got to get some chromoly in here. I've done a light search. Cheap place out of Michigan that sells it for $5.50/ft. One place I called here in town wanted $7.95 per foot. I need to start calling today. (as stated earlier - ended up deciding on Mild Steel)

Last edited by 95ONE; 08-06-2012 at 09:22 PM.
95ONE is offline  
Old 01-08-2009, 04:43 PM
  #44  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

Originally Posted by blown 944 View Post
ummm...

you are making me feel trivial.

hats off..you are really knocking it out of the park
You're modest. I know you can handle any of this.
95ONE is offline  
Old 01-23-2009, 06:30 AM
  #45  
95ONE
Super User
Thread Starter
 
95ONE's Avatar
 
Join Date: Sep 2005
Location: TEXAS
Posts: 4,245
Default

More work yesterday and today. Can't find the damn camera though.

I welded every seam in front of the firewall. Cage will take care of the rest. maybe a seem or two in other places.
First used sand. Then Soda. Neither one were that quick. Ended up using Wire wheels and such. Sound deadening still caught fire about 15 times. (opposite sides and things)
Just couldnt work hard enough to get the metal completely clean in front of and behind and in-between. So I just stayed prepared for fire. - Car is just a shell anyway. not even 1 wire left. WHICH by the way weighed in another 20lbs. (Fuse box and assorted wiring to front and rear mostly not needed anymore) Might put back 5.

Also got in my 996 twin turbo monoblocks today. Compared them to the 993 Twin turbos. Slightly smaller cast. 2lbs lighter. But they're a stronger casting with the same pistons and pad. Less is definately more. -- I would post pics but I still have to find the camera.

I'm going to start welding up some stuff on the rear of the car. I still haven't gotten the chromoly in. I still haven't ordered the fiberglass roof and rear fiberglass license area. (basically $1500 in parts and tubing)

This might take a while. EDIT: HA! a while... Just got the rear fiberglass piece in from lindsey Sept 8th? yeah.. it took a while.. Fiberglass Roof panel still isn't ordered.

Last edited by 95ONE; 09-13-2009 at 01:41 AM.
95ONE is offline  

Thread Tools
Search this Thread
Quick Reply: Winter project under way. Updated 01/07


Contact Us About Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: