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'74 X7 Turbo rwd -spring '17 prep

Posted: Sat Oct 05, 2013 2:49 pm
by schwartz
Alright, I'll try to sum up the two years I had the car.

Around 2006 it looked like this.
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Picked it up like this.
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Modified torpedo wall.
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Planning a shifter.
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Speedo.
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Undercoating…
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Rear arch.
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Some new floor.
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Sandblasted and zink primed chassi
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Speedparts order
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Roll cage
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Crank pulley and rear ARB bushings
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Mockup
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More chassis
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Weight reduced.
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Turbo tank
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On wheels
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Makrolon windows
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Wiring
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BBS RS 15x7"
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Street legal
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First summer
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Autometer gauges
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Wider wheels
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US-spec
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Bigger intercooler, 450x160x90mm
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Adjustable rods and 228mm clutch
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New seats
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900 radiator
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Relocated mirrors
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Interior #2
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Cold air intake
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Wider arches
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Engine rebuild
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Coilover conversion
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Home made window vents
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NG900 oil cooler
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900 ARB
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Back in place
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Testrun spring 2013
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Tail pipe
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Duck tail
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Photo session
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Trackday but the left drive shaft decided to fall out
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Dyno run
http://www.youtube.com/watch?v=o5Nz8V487nk

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Pic from a meet
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…. and now its back in the garage
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Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 3:43 pm
by gmreider
:-O That's an impressive amount of quality work. There are great details for others to copy from your fine photos. Sets the bar a little higher for some of us to work toward on our projects.

Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 6:15 pm
by squaab99t
gmreider wrote::-O That's an impressive amount of quality work. There are great details for others to copy from your fine photos. Sets the bar a little higher for some of us to work toward on our projects.


Giving Luke a run for his money.
Agreed a nice bit of work there. The rear wheel drive will be a great addition as a project.
The bar has always been a "bit" higher here at Saabrally. I even think twice before I post a picture of my work.

Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 6:57 pm
by sjones
squaab99t wrote:The bar has always been a "bit" higher here at Saabrally. I even think twice before I post a picture of my work.


You're being too humble squaab99t. 009 and your 99T are way up there.

Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 6:57 pm
by RadioFlyer
Wow.

Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 7:06 pm
by SwedeSport
I love this project.

There is a little bit of JDM / Tuner styling going on here and I totally dig it. Definitely not the typical Saab build.

Re: '74 X7 Turbo

Posted: Sat Oct 05, 2013 10:36 pm
by hutch
Ive only been in Sweden twice but it seems like you guys have a great grasp on American culture, so this is all I have to say:

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Re: '74 X7 Turbo

Posted: Sun Oct 06, 2013 3:10 am
by schwartz
Glad you like it, feel free to ask about anything!

Re: '74 X7 Turbo

Posted: Sun Oct 06, 2013 9:34 am
by squaab99t
schwartz wrote:Glad you like it, feel free to ask about anything!


How are the adjustable springs working for you? The static height seems pretty short and it looks like you would get coil bind on the front due to the lever ratio. The sleeves look like they would crash too. Or is the spring so high that it hardly moves?
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Is there an spring isolator on the top or is it right into the body?

Re: '74 X7 Turbo

Posted: Sun Oct 06, 2013 11:22 am
by schwartz
It works well, the spring is 124N/mm so its pretty stiff. The static height is really low, almost too low. The motion ratio is the same as stock and there is no isolator between body and spring.

Nice with the ability to choose ride height though.

Re: '74 X7 Turbo

Posted: Sun Oct 06, 2013 12:42 pm
by squaab99t
schwartz wrote:It works well, the spring is 124N/mm so its pretty stiff. The static height is really low, almost too low. The motion ratio is the same as stock and there is no isolator between body and spring.

Nice with the ability to choose ride height though.

A SI to english conversion gives me a value of 705lbs/in. For the that rate in the front and such a light car I would think that would bounce all over the road in the corners if the surface is not perfectly smooth. I guess I don't know your purpose of the car. Track, daily driver, show, experiment project?

By ratio I was referring to the lever arm, front versus the rear. This is where the reaction distance relative to the pivot and the force in (hub). As an example I run 550lbs/in and 650lbs/in, front and rear respectively for a street driven 900s sedan and it is pretty stiff.

Re: '74 X7 Turbo

Posted: Sun Oct 06, 2013 2:37 pm
by schwartz
The main purpose is a fun car (it's only on the roads during the summer) which looks good and works alright on the track. The car is so low that it needs to be stiff (although I know that over-stiff isn't good either).

Comfort isn't prioritized. How does your S work with that setup, and what dampers do you use? I had adjustable AVOs on mine.

Re: '74 X7 Turbo

Posted: Mon Oct 07, 2013 5:24 pm
by squaab99t
schwartz wrote:The main purpose is a fun car (it's only on the roads during the summer) which looks good and works alright on the track. The car is so low that it needs to be stiff (although I know that over-stiff isn't good either).

Comfort isn't prioritized. How does your S work with that setup, and what dampers do you use? I had adjustable AVOs on mine.


It seems to rail pretty well. I have adjustable jack screws on the front and adjustable perch on the rear. The front is very easy to adjust with a 18mm socket.
Height Adjustable Front Springs.jpg

The rear is similar to your adjustable threaded ring.
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IMG_2085.sized.jpg (75.48 KiB) Viewed 12088 times

I use Bilstein HD aka B-8, the yellow ones.

Re: '74 X7 Turbo

Posted: Mon Oct 07, 2013 6:32 pm
by 99Super
Yummy!

Did removing the structure from the rear deck lid effect the stiffness much?
I did the same to my front and there is quite a bit of flex when trying to close the hood.

Great work!

john

Re: '74 X7 Turbo

Posted: Mon Oct 07, 2013 6:46 pm
by DrewP
Yes, cutting the rib out of the trunk lid makes it extremely flimsy. Just the tension of the springs in the hinges to keep it open is almost enough to bend the trunk lid. I had to remove the springs completely from mine when I cut out all the stiffening like Schwartz did.