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Learning how to build Lotus Seven replicas...together!
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PostPosted: June 17, 2013, 2:08 am 
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Joined: November 15, 2009, 9:58 pm
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Location: Port Angeles. Wa
I have been working on this for a while now.
Yamaha R6 - approx 130 hp at 13,500
10" SCCA Formula 500 wheels - 18" tire od.
Chain drive VW Golf differential with inboard brakes
Hope to run with ICSCC (International Conference of Sports Car Clubs) in the Pacific Northwest or just track days.
Skayt'R6 (skate - r - 6) - any better thoughts on a name????

I should have the frame tacked together by the end of next week (baring any further setbacks)

JMR

Forgot to add -- approx 86" wheelbase and 66" overall width (56" rear track and 58" front track)


Attachments:
File comment: Frame pieces on the "table" (2' x 8').
2 front tires on the lower shelf.

chassis fitting 006.jpg
chassis fitting 006.jpg [ 73.84 KiB | Viewed 5844 times ]
File comment: Rear hub with wood "bearing" in a wheel for mockup.
rear hub-wood brg 010.jpg
rear hub-wood brg 010.jpg [ 54.82 KiB | Viewed 5844 times ]
File comment: Differential carrier with inboard brakes.
diff carrier003.jpg
diff carrier003.jpg [ 68.37 KiB | Viewed 5844 times ]
File comment: Front spindle assembly jig
FRONT SPINDLE-BRAKE ASSEMBLY 001.jpg
FRONT SPINDLE-BRAKE ASSEMBLY 001.jpg [ 63.66 KiB | Viewed 5844 times ]
File comment: All stuck in a 10" wheel.
FRONT SPINDLE-BRAKE ASSEMBLY 006.jpg
FRONT SPINDLE-BRAKE ASSEMBLY 006.jpg [ 60.95 KiB | Viewed 5844 times ]
File comment: Front spindle, hub and brake parts (4 piston Wilwood caliper on a 7+" rotor.
FRONT SPINDLE-BRAKE ASSEMBLY 008.jpg
FRONT SPINDLE-BRAKE ASSEMBLY 008.jpg [ 56.74 KiB | Viewed 5844 times ]

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My build log viewtopic.php?f=36&t=10658&start=0 NOW NAMED =The Wycked 7
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PostPosted: June 17, 2013, 9:26 am 
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Joined: March 3, 2006, 10:48 pm
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[Hope to run with ICSCC (International Conference of Sports Car Clubs) in the Pacific Northwest or just track days.
Skayt'R6 (skate - r - 6) - any better thoughts on a name????

How about "F...ing Fast". That thing is going to be wild. Love your spindles. Russ

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PostPosted: June 17, 2013, 12:11 pm 
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Joined: April 12, 2012, 11:56 am
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Location: Pemberton, BC
Very cool build. Look forward to it. You do such nice work.
I fondly remember Conference racing. Raced FF from 83 to 87; SIR, PIR and good old Westwood. Were you around in those days?

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My build log:
viewtopic.php?f=35&t=14520&start=0
My build video:
https://vimeo.com/143524140


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PostPosted: June 17, 2013, 12:25 pm 
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Kartracer, interesting build! Keep posting progress. Love your creative solutions.

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My Car9 build: viewtopic.php?f=35&t=14613
"It's the construction of the car-the sheer lunacy and joy of making diverse parts come together and work as one-that counts."

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PostPosted: June 17, 2013, 12:41 pm 
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Joined: November 15, 2009, 9:58 pm
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Location: Port Angeles. Wa
Thanks for the comments!
I moved from Southern California in 2005. The Superkart and I did PIR, SIR, Bremerton, Spokane and lastly The Ridge once we were here. Sold the kart last year. The Ridge is a very neat track.

JMR


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PostPosted: June 17, 2013, 5:10 pm 
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Joined: November 13, 2005, 9:16 pm
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Location: Scottsdale AZ
How long does an R6 last at 13,500 Rpm?


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PostPosted: June 17, 2013, 6:21 pm 
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Location: Port Angeles. Wa
A friend of mine, Rick Goodwin, built a number of cars which I believe he called FSR's for Bill Huth of Willow Springs Raceway. The prototype has been thrashed for 2+ years and has the same engine.
Video of Eddie Lawson driving one can be found here: http://www.youtube.com/watch?v=54C8i9acRaY
They are basically karts, no suspension, running Formula 500 road race slicks. Flat shifters and a roll cage of sorts have been added.

JMR

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When you're racing, it's life. Anything that happens before or after is just waiting -- Steve McQueen from LeMans
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My build log viewtopic.php?f=36&t=10658&start=0 NOW NAMED =The Wycked 7


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PostPosted: June 17, 2013, 7:19 pm 
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Joined: April 5, 2008, 2:25 am
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Location: Fort Worth, Texas
That's a confusing course at times. Good video

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PostPosted: June 17, 2013, 10:02 pm 
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Joined: October 6, 2009, 9:29 am
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Location: Tallahassee, FL (The Center of the Known Universe)
Yo Kartracer-
Interesting concept, pics of the bits you built so far look great. Please keep us posted on progress, I wanna watch this one!
:cheers:
JDK

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PostPosted: June 18, 2013, 1:04 am 
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Joined: November 15, 2009, 9:58 pm
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Location: Port Angeles. Wa
Thanks Tom, JDK, Carguy and mgkluft.
I ran Streets before they softened the hairpin turn (4?) in my Superkart - 1:19's in 2005. A couple of bumps are still bad but the banked bowl on the back of the course really pulled G's. I think the course is more fun backwards.

I will post progress.

Welded the lower frame rails that will be hidden by other tubes, added a temporary brace to position the rear roll hoop, tacked the front and rear roll hoops and the 4 cockpit side bars. . Engine first fit tomorrow.

JMR


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PostPosted: June 26, 2013, 9:19 pm 
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Joined: November 15, 2009, 9:58 pm
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Location: Port Angeles. Wa
Made a lot of progress on the new project this past week.

JMR


Attachments:
6-26-13 003.jpg
6-26-13 003.jpg [ 643.5 KiB | Viewed 5520 times ]
6-26-13 002.jpg
6-26-13 002.jpg [ 650.5 KiB | Viewed 5520 times ]
6-26-13 001.jpg
6-26-13 001.jpg [ 660.3 KiB | Viewed 5520 times ]

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When you're racing, it's life. Anything that happens before or after is just waiting -- Steve McQueen from LeMans
http://WWW.TRICKSOLUTIONS.COM

My build log viewtopic.php?f=36&t=10658&start=0 NOW NAMED =The Wycked 7
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PostPosted: June 27, 2013, 7:10 am 
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Nice! What rack are you using? How wide? How much travel does it have? My rack is a latest rage, 8.5", two inches total travel. I'll be making the tie rod arms shorter on the spindles for a greater degree of turn, but I think my effort may be excessive. I have one inch of travel (to the stop) for 360 degrees of steering wheel rotation in each direction.


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PostPosted: June 27, 2013, 11:16 am 
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The rack I am using is from this company http://www.desertkarts.com/item80862.ctlg Drawing and ratio shown when viewed. Chinese knockoff of a Stilleto rack. Play seams excessive so I will probably either remachine or make a new housing after I get the car running.

JMR


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PostPosted: June 28, 2013, 5:07 pm 
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You have over twice the travel, but a quicker ratio, so maybe my effort won't be too bad. I can always get a different rack later. My rack was from Taiwan and has no discernable play from what I can tell without a dial indicator test.

I have an electric reverse like Fred in his JZR, so the turning circle needs to be pretty tight.


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PostPosted: November 26, 2013, 10:47 pm 
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Location: Port Angeles. Wa
Some updates and a couple of "tip's" for building headers.


Attachments:
8-27-13 014.jpg
8-27-13 014.jpg [ 68.27 KiB | Viewed 4639 times ]
8-27-13 004.jpg
8-27-13 004.jpg [ 70.69 KiB | Viewed 4639 times ]
File comment: Headers in a fixture. I have previously used a hose clamp with 3 holes drilled in it. I can tack weld thru the holes with my TIG.
10-13-13 001a.jpg
10-13-13 001a.jpg [ 62.29 KiB | Viewed 4643 times ]
File comment: This time I used 3 pieces of feeler gauges (.005 or so) and 2 hose clamps.
Works much better.

10-13-13 002.jpg
10-13-13 002.jpg [ 45.99 KiB | Viewed 4643 times ]
File comment: I laid out a degree pattern on a board to improve the accuracy of cuts on U bends.
10-13-13 004.jpg
10-13-13 004.jpg [ 54.23 KiB | Viewed 4643 times ]
10-13-13 005.jpg
10-13-13 005.jpg [ 56.71 KiB | Viewed 4643 times ]
File comment: Me in the car! Right front at full bump and left front at full droop (2" delta)
10-18-13 003.jpg
10-18-13 003.jpg [ 65.43 KiB | Viewed 4643 times ]
09-04-13 001.jpg
09-04-13 001.jpg [ 79.92 KiB | Viewed 4643 times ]

_________________
When you're racing, it's life. Anything that happens before or after is just waiting -- Steve McQueen from LeMans
http://WWW.TRICKSOLUTIONS.COM

My build log viewtopic.php?f=36&t=10658&start=0 NOW NAMED =The Wycked 7
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