C7 to SC10-I Suspension Swap 93 Grand Touring PRS Chassis - Snowmobile Forum: Your #1 Snowmobile Forum
http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum > Specific Snowmobile Forums > Ski-Doo Snowmobiles


» Sponsors





Reply
 
LinkBack Thread Tools Display Modes
Old 02-05-2010, 01:44 PM   #1 (permalink)
Registered User
 
Join Date: Jan 2010
Location: Sarnia, Ontario Area
Posts: 25
Thumbs up C7 to SC10-I Suspension Swap 93 Grand Touring PRS Chassis

Just finished the C7 to SC10-I swap into the 93 Grand Touring which is a PRS chassis
Like to say thanks to all the folks with the great posts on this board and to smallengineguy for his assistance!
This is not a really hard mod to complete and there are lots of posts on doing the mod on newer sleds
PRS use the L brackets on the front which make it a bit more interesting.
The 93 Grand Touring came with a 16" x 121" track so the tunnel is wider than some of the newer sleds
The front L brackets provide a 1/2" spacer on each side
They need to move down 1 inch and back 4 inches to give enough clearance between the drives and the front of the skid. Just take the L brackets mark a 1" line and straighten them out in a vice and then rebend the bracket 1" shorter to drop the skid. On this sled the brackets end up on the rear side of 3 rivets on the tunnel.
Next
I used a piece of flat bar and marked it for the SC10 CTC of 24 3/4" and drilled it so I could mount in the front L brackets and to get the rear brackets in the right location
Mounted the Front L brackets onto the sled without the skid first but with the flat bar bolted on
This gave me the CTC mounting distance on the rear
As my sled has the wider tunnel I need to use 1/2" spacer on the back to mount the new skid
I had a spare set of front L Brackets so I straightened them in the vice and with about a 1/2" bend on the top end they fit perfect for the rear mount as to the height from the tunnel top
Put the L brackets on the front of the new skid You will have to narrow up the plugs in the sc10 skid about 1/8" to make the side to side fit properly. Measure the side to side of the old skid and make sure the new one is the same!
Couple of bolts and some steel poprivets and the job is done
I used the cross shaft in the middle of the tunnel from the SC10 I skid and mounted it in the same holes the shocks on the C7 used to ensure the track does not flop around in the middle
Hardest part of this mod is getting the new skid to push back into the tunnel far enough for the new mount holes
Use a rachet strap and pull down the front shock to give you extra room and drop the rear shock and springs down Makes the job a whole bunch easier.Keep the sled rear in the air and use a floor jack to raise the front of the skid to match up the holes worked the best for me
This took me a couple of nights to complete but I think it is well worth the effort
C7 to SC10-I Suspension Swap 93 Grand Touring PRS Chassis-skid-dimensions.jpg


Here are some pic's
http://s850.photobucket.com/albums/a...I/Skid%20Swap/

RR1

Last edited by RJ Gleason; 02-05-2010 at 02:20 PM. Reason: fix link
RoadrunnerII is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-05-2010, 02:21 PM   #2 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,601
Fixed your link.

Now you just need some of the completed work.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 02-05-2010, 02:53 PM   #3 (permalink)
Registered User
 
Join Date: Jan 2010
Location: Sarnia, Ontario Area
Posts: 25
Red face Whoops!

I missed the most important shots
There are up on photobucket now
Now if we just got some snow here!!!

RRII
RoadrunnerII is offline   Reply With Quote
Old 02-05-2010, 04:42 PM   #4 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,601
Your link to the album was not syntaxed correctly and would not work so I edited to so that it would.


Nice work!!
The improved ride will be a very pleasant surprise to your back.

I will link this into the "how to" thread for the benefit of others.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 03-02-2010, 10:26 AM   #5 (permalink)
Registered User
 
Join Date: Mar 2010
Posts: 1
Awesome conversion! I have a 93 Formula Plus which is mint, but man it needs some
suspension - would SC10 fit this? I can get this for $300. Great pics by the way,
just joined this forum & its gonna be a big help.
Parkolad is offline   Reply With Quote
Old 03-02-2010, 10:31 AM   #6 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,601
Yes you can install the SC-10 in that with the right measurements from the donor sled.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 03-02-2010, 10:49 PM   #7 (permalink)
Registered User
 
Join Date: Jan 2010
Location: Sarnia, Ontario Area
Posts: 25
Quote:
Originally Posted by Parkolad View Post
Awesome conversion! I have a 93 Formula Plus which is mint, but man it needs some
suspension - would SC10 fit this? I can get this for $300. Great pics by the way,
just joined this forum & its gonna be a big help.
You can fit an SC 10 I or SC10 II
SC10 III will required a different CTC measurement
Your Formula Plus will have the same tunnel setup as the 93 GT I believe
So L brackets rebend 1" shorter to lower the mount out of the tunnel
Move the L Bracket mount to the rear of the sled 4"
Make up a template and bolt it to the L bracket and mark your holes to the rear
Measure down from top of the tunnel per the diagram
If you intend to stud your track I would suggest lowering the rear mount an extra inch
Give you a bit more clearance

Enjoy
Best think you can do to these sleds to improve the ride
My son is thrilled with it and is doing a good deal of riding since we completed the swap. He is amazed at how well the sled handles with the new skid

RRII
RoadrunnerII is offline   Reply With Quote
Old 02-06-2011, 03:57 PM   #8 (permalink)
Registered User
 
Poorfarmer44's Avatar
 
Join Date: Nov 2009
Location: Greenwood Nova Scotia
Posts: 2
Quote:
Originally Posted by RoadrunnerII View Post
You can fit an SC 10 I or SC10 II
SC10 III will required a different CTC measurement
Your Formula Plus will have the same tunnel setup as the 93 GT I believe
So L brackets rebend 1" shorter to lower the mount out of the tunnel
Move the L Bracket mount to the rear of the sled 4"
Make up a template and bolt it to the L bracket and mark your holes to the rear
Measure down from top of the tunnel per the diagram
If you intend to stud your track I would suggest lowering the rear mount an extra inch
Give you a bit more clearance

Enjoy
Best think you can do to these sleds to improve the ride
My son is thrilled with it and is doing a good deal of riding since we completed the swap. He is amazed at how well the sled handles with the new skid

RRII
Does anyone know the ctc measurement for a sc10 III? I don't have access to the donor sled.
Poorfarmer44 is offline   Reply With Quote
Old 02-06-2011, 05:15 PM   #9 (permalink)
Registered User
 
Join Date: Jan 2010
Location: Sarnia, Ontario Area
Posts: 25
Cool

I have seen posts for the SC10 III as CTC of 24" even and 24 1/8"
SC10 I and SC10 II are both 24 3/4"
These are all on the 121" track
If you are doing the conversion on a 136" skid the measurements are different
I beleive the measurement on the 136" is 30.5 but please do a Google search and all of your questions will be answered
This forum and a couple of others have lots of posts on SC10 conversions

A search of SC10 III CTC will get you there

Enjoy as these conversions are the best thing to happen to a C7 equip'ed sled


RRII
RoadrunnerII is offline   Reply With Quote
Old 02-06-2011, 05:59 PM   #10 (permalink)
Registered User
 
Poorfarmer44's Avatar
 
Join Date: Nov 2009
Location: Greenwood Nova Scotia
Posts: 2
Thanks for the info, it is a 121. I am really looking forward to riding this sled.
Poorfarmer44 is offline   Reply With Quote
Old 02-17-2012, 08:18 PM   #11 (permalink)
Registered User
 
Join Date: Feb 2012
Posts: 6
Just bought a SC-10 1 skid and looking forward to slipping it into my 1992 Formula Plus!! This forum will be a great help. Thank to all
jomish is offline   Reply With Quote
Old 02-17-2012, 08:39 PM   #12 (permalink)
Registered User
 
Join Date: Jan 2010
Location: Sarnia, Ontario Area
Posts: 25
Enjoy the SC-10
Your back will thank you!
Been a really poor year for snow here in the Sarnia Area
More rain than snow!
My son and I trailered over to Baldwin Michigan for a weekend of riding
We put 330km's on About 200 miles
The SC-10 on the old 93 took it all in stride!
Still believe it was the best thing we ever did to that Machine!
Nothing broken and our back's where not that sore!

RRII
RoadrunnerII is offline   Reply With Quote
Old 02-17-2012, 09:09 PM   #13 (permalink)
Registered User
 
Join Date: Feb 2012
Posts: 6
Glad u got some snow time in. Definitely a bad year for the white stuff. Here in SW Michigan we were only able to get out a hand full of times :-( Luckily there is always next year and it will be great running with this new suspension. My chiropractor will miss me though. LOL
jomish is offline   Reply With Quote
Old 02-17-2012, 09:37 PM   #14 (permalink)
Registered User
 
Join Date: Sep 2011
Location: Ames Iowa
Posts: 114
enough room for a 1.25?
minisrint521 is offline   Reply With Quote
Old 02-19-2012, 08:25 AM   #15 (permalink)
Registered User
 
Join Date: Feb 2012
Posts: 6
wont know until i get it in. Not sure what others with this conversion are running. would like to have enough room for studs. Anybody else know?
jomish is offline   Reply With Quote
Old 02-19-2012, 08:27 AM   #16 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,601
1.25 should fit without studs.
If you want to use studs, 1" is all you can run in it.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 02-19-2012, 08:30 AM   #17 (permalink)
Registered User
 
Join Date: Feb 2012
Posts: 6
Sounds good. Thats all i need around here. Too bad it looks like no more snow for this year
jomish is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 05:04 PM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0