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Designer King
 
Paulporsche's Avatar
 
Join Date: Mar 2004
Location: Toronto, ON Canada
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Excellent!

What race series will you run w/ this car?

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Paul
Yellow 77 Sunroof Coupe/cork interior; 3.2L '80 SC engine/10.5:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein HDs; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Goodrich G Force Sport Comp 2; PCA/UCR, MID9
Never leave well enough alone
Old 12-05-2008, 05:51 AM
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At the track = great day
 
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Join Date: Jun 2008
Location: Austin, Texas
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Garage
Quote:
Originally Posted by JohnJL
the Autorotor is MX420, 2.0L displacement. Its on this page...http://www.hi-flow.com/HP7Super.htm
That is a nice supercharger.. when I had my miata I was going to make a supercharger for it and was looking at a smaller version of the Autorotor or a MP62. However, once I got into the logistics of creating it, I realized I didn't really like the Miata.. so I sold it and got a 911.

Quote:
Originally Posted by JohnJL View Post
Anyone ever get really frustrated by a Previous Owner who has hacked into the wiring harness, in good will, but leaves you no hint how to figure out how to diagnose what happened when something goes wrong?

Well, no more. Having done a few rebuilds now I am resolved to always to a complete wiring diagram. If not for resale value, for my own ability to diagnose in the field.
That is a good idea... when I get around to messing with my engine I was going to go the standalone ECU route and was planning on doing the exact same thing.

Good luck on the project and keep us updated. I love seeing what everyone is doing.. it helps give me ideas for my money pit - i mean car.
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Lane
2011 Volkswagen Jetta SportWagen TDI
Looking for another sports car..
Old 12-05-2008, 06:23 AM
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Excellent and interesting work John. Keep us posted on your lap times vs the field.

Also very interested in any dyno torque curves.

Top job.
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“If you want to win anything- a race, yourself, your life- you have to go a little berserk” - Dr George Sheehan.
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Old 12-05-2008, 11:18 AM
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Thanks Herman. I got that idea from someone else here.

Paul, there is a Supersprint series here, some tarmac rallies too. Maybe Targa Tasmania again.

I'll post dyno and fuel/spark maps when I get there...
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 12-05-2008, 12:26 PM
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I really like this pic, looking down the TB. That manifold was my first go at hand-forming aluminum.





That's Paul, owner of Evolution Motorsports who's teaching me some basic fabricating. He's a great teacher...shows you once then makes you do it then on. Very patient.



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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 12-05-2008, 04:46 PM
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Location: Decatur/Madison, Alabama
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Cool project. Looks like some good choices so far to me.

One thought I had was that it might be possible to reduce the load on the alternator shaft by adding an idler wheel that contacts the alternator pulley in the 7 0'clock position and adds an adjustable pressure towards the 1 o'clock direction to counteract the belt tension.

Keep posting the pictures. I'd like to see how this turns out and hear some of the driving reports.
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Rob Channell
One Way Motorsports
1979 911SC mostly stock
1972 911T Targa now with a good 2.7
1990 Miata (cheap 'n easy)
1993 C1500 Silverado (parts getter)
Old 12-05-2008, 07:03 PM
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Nice idea!
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 12-05-2008, 10:38 PM
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A lot of progress but I'm still anxious to get 'er going...
So here she is before Christmas...We will do a bunch of lightening to the plate once all the braces are in place...its 2 plates of 6MM alu boeing-glued and bolted together. We're going to recess the tensioner into the back plate but still have serious stiffness. In the design process Paul pointed out the fan can go back out of exact trueness on reinstallation or even under torque. With a goal of 100% reliability and fast field-servicing I agreed the fan was not going to be in the mix. The Fan/alt will be 50% overdriven but on a v-belt directly off the crank rather than a serpentine system which is what I originally planned.



I made up the fuel rails under the instruction and guidance of Paul. The design was his idea, he did the lathework (after some dramas on the machine...never leave the key in the chuck and remember to turn it forwards!) and I did the sheetmetal work with his direction. I've very happy with them...










Then we (mostly he, I spent a lot of time on the errand bike out to the supply stores) worked on the stabilizing and adjusting brackets for the supercharger. This is trick, if I you would allow me that. The system is mounted off lengthened studs in the 1-2-3 heads. They are a set of 3 turnbuckes on 10mm aero-type spherical bearings. You can move the turnbuckle 2 degrees and see the corresponding adjustment in the supercharger attitude. The front is mounted with 12MM ALU plate joining both engine case halves, braced off the chain housing and then back to the turnbuckle system. I am predicting no thrown belts!

OOps forgot to snap pics of the mounting system, will do Thursday/Friday.

In the meantime here's the new dash I fabricated. Includes:

1-6 cylinder head temp selector switch (one of the blank holes)
Fire extinguisher pull trigger (one of the blank holes)
Extinguisher nozzel (one of the blank holes)
Main Power "launch" switch
Starter "Launch" switch
Accessory switch
Defroster switch
Racecam Camera system on/rec/off momentary switch
Camera on/recording flash leds
progressive 5 Throttle position LEDS
progressive 5 brake pressure leds
3-stage/green/yellow/orange LED rev limit indicators
Stewart Warner Gauges:
Boost/vacuum
Fuel Pressure
Differential Temp
Voltage

Flashing superbright LEDS for:
Brake fluid low
Charging/Alternator not charging
Oil pressure






I like the dash and it gave me the opportunity to clean up the electrical system a lot.
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-19-2009, 02:19 AM
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Wow...speechless. Breathtaking work and fabrication - congrats!!...Why did you choose Supercharging over turbocharging out of curiosity?

Yasin
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Old 01-19-2009, 02:59 AM
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3 restos WIP = psycho
 
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Lookin' might fine! No "swiss cheese" holes for the SC mount?
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Old 01-19-2009, 08:57 AM
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Thanks guys. We'll add some speed holes once the idler pulley and tensioners have been positioned.

I chose supercharging because I wanted power I couldnt reasobably get with NA, wanted progressive torque curve, have a mate who has done it before and is willing to share & help, and because its different.
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-19-2009, 12:03 PM
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john

beautiful fab work. do you think it would be allowed to run in targa tas?
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Cheers, Ryan
1969 911E (historic racer)
911ST replica (tarmac rally)
Old 01-19-2009, 01:33 PM
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Not sure...I did Targa in the 71 last year and loved it, this would be a serious weapon there. Not sure what class it would fit into. However its not street legal and I havent looked into a rally reg for it yet.
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-19-2009, 03:12 PM
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i've done targa a few times and haven't checked the regs for a while but i doubt you could run it in competition with those mods. (cars have to be basically period correct)

they might let you tun in touring though.
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Cheers, Ryan
1969 911E (historic racer)
911ST replica (tarmac rally)
Old 01-19-2009, 03:31 PM
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'That'll kill some bugs.'

Beautiful job.
Old 01-19-2009, 05:47 PM
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The gas/brake meter makes me think im playing Gran Turismo. Nice
Old 01-19-2009, 06:14 PM
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So some progress today, at least in terms of planning. Here's the mounting system, whch is pretty cool if I can say so...





Plan is for 21" wide, 14" long, 3.5" deep intercooler. Internal baffling, anti "oil can" struts and such. Bell says it flows 1200 cfm. I need 800 cfm for 500hp (I think!)
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-29-2009, 02:48 AM
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And some more with the mock-up intercooler. While the model is 7" deep, actuAl will be 3.5"
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-29-2009, 02:53 AM
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2007 911 Turbo - Not a toy
1985 911 Cab - Wife's toy
1982 911 3.2 Indiash Rot Track Supercharged track toy
1978 911 3.0 Lichtbau toy "Gretchen"
1971 911 Targa S backroad toy
Old 01-29-2009, 02:56 AM
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Blackbird Pilot
 
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Awwwwwwwwwesome

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Old 01-29-2009, 03:02 AM
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