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Post by sprintmania on Dec 31, 2012 18:41:58 GMT -6
this is last years model , it made it 70 miles out of 100, chaise & track was 73 nitro, 70 340ss motor,71,72 sprint hood steering bar, she was heavy and kind of a pig, i had it clutched for 6000 rpm to a T to stay in the power-band but i left the secondary alone from the nitro and the gears ratio out of the nitro,that was my first time building and racing and was the only rupp out there  any tips, tricks or set-ups,advise would be greatly appreciated, i want to make her fly like them yamies do and there all steel!! |
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Post by sprintmania on Dec 31, 2012 20:21:22 GMT -6
here is the next proto type 70 sprint bulk head hood and belly pan, 71 sprint handel bars, 73 nitro tunnel and susp.and chaincase  |
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Post by seacoastrupp on Jan 1, 2013 9:18:15 GMT -6
Might want to try a gear change??
That Sachs is a tough match for those reed yamis,
here on the east coast the yamahas are tough to beat as well..
The other diference I see is Boggie(Yam. ) suspension, versus slide rail.. depending on the conditions of the day, the boggie suspention did better. Wich suspension had the least rolling resistance. As far as Rubber tracked vs. cleated track you were about the same if they were both stock.
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Post by chrisb7882 on Jan 1, 2013 13:40:11 GMT -6
I have a 71 sprint with the 290ss I can not help you on clutch and gearing but on my sled I cross braced the steering hoop and braced from the footwell brace up to the steering hoop also. This made the whole front of the sled much stiffer. Keep up the good work and keep posting pictures.
Chris
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Post by sprintmania on Jan 1, 2013 14:04:48 GMT -6
im going to run the relic class so im taking out the 340ss and running a sa 290 instead so mabe your specs would be a good place to start i no your ss make a little more power but its a better than not having a clue
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Post by ruppluver on Jan 1, 2013 15:05:29 GMT -6
sprintmania,I sent you a pm.
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Post by rupp838485 on Jan 1, 2013 16:59:16 GMT -6
We have raced these chassis for the last 12 years in VOLS. I can tell you the gearing and the clutch set up and yes we have a wall full of trophies.
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Post by sprintmania on Jan 1, 2013 17:21:49 GMT -6
do tell or pm me PLEASE!
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Post by sprintmania on Jan 1, 2013 20:06:00 GMT -6
i think it mite work ,i can cram 12 in there with out getting in the way it stick up about 3/4 to a inch above the hi-fax will have to see how it hooks up.
i have a 12,13,14 tooth top gear and a 28 bottom witch top gear should i slap in i am running a comet duster white spring and six pucks
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Post by rupp838485 on Jan 1, 2013 20:27:52 GMT -6
13-28 gears are you running slides? We run a set of idler wheels in the tunnel to keep the track off the suspension. What are you running for pucks as to grams? What kind of exhaust? What is your timing set at?
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Post by sprintmania on Jan 1, 2013 20:36:52 GMT -6
yes im slides, ill way them out the pucks they have a small hole in them, stock can and ill check the timing, thanks for replyn
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Post by rupp838485 on Jan 1, 2013 20:41:17 GMT -6
Are you running 3- 25.5 gram pucks and 3- 20.0 gram pucks?
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Post by sprintmania on Jan 1, 2013 21:30:14 GMT -6
i can remember what the weighed, i baught it from hendershots and had extra pucks and a yellow and white spring, ill bring them in and slap them on the oladys diet scale tomorrow
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Post by sprintmania on Jan 2, 2013 13:24:14 GMT -6
they are all 23 grams
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Post by sprintmania on Jan 28, 2013 8:22:09 GMT -6
got it painted,ski's and steering are in working on the motor should make a test run this weekend |
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Post by sprintmania on Jan 28, 2013 8:24:48 GMT -6
![]() [/img] |
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Post by sprintmania on Jan 28, 2013 8:27:01 GMT -6
ford tractor red  |
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Post by magnumal on Jan 28, 2013 8:51:26 GMT -6
good luck with it have fun !!
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Post by ruppluver on Jan 28, 2013 9:49:48 GMT -6
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Post by sprintmania on Feb 7, 2013 21:13:14 GMT -6
getting closer
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