|
|
Post by azgreg on Jul 23, 2009 15:53:28 GMT -7
Iam getting an early start on this coming season pack race. The rules call for a wheelbase of 4 1/4" to 4 5/8". The Position of the axles is not regulated. How far back do you guys recommend the rear axle? I am planning to run the full 4 5/8 wheelbase with a modest 3/4" COM as the pack track is an older wood track. Here is a link to the rules: www.doubleknot.com/openrosters/DocDownload.asp?orgkey=62&id=53677 |
|
|
|
Post by W Racing on Jul 23, 2009 16:32:41 GMT -7
5/8" from the rear  |
|
|
|
Post by Carolina Gravity Sports on Jul 23, 2009 16:45:50 GMT -7
Put them 5/8" from the back and that should leave just a tad bit of the body sticking out past your wheels (about a 1/32" or so). If they put your car in a gauge box and close the door, it will touch the body and not your wheels. Those rules should allow you to get a little creative. We had rules like that one year and we showed up with a typical Stocker car with 3 wheels on one side and a guide up front running 3.3g wheels and they wouldn't let us run it because they had never seen nothing like that and it needed to look normal.  |
|
|
|
Post by azgreg on Jul 23, 2009 17:03:12 GMT -7
I was thinking about imbeding one wheelin the body,but the wheelbase rule has wondering. Does the wheelbase have to be the same for both sides? I have not had confirmation from district yet.
|
|
|
|
Post by Shade Racing on Jul 23, 2009 17:26:34 GMT -7
Put them 5/8" from the back and that should leave just a tad bit of the body sticking out past your wheels (about a 1/32" or so). If they put your car in a gauge box and close the door, it will touch the body and not your wheels. Those rules should allow you to get a little creative. We had rules like that one year and we showed up with a typical Stocker car with 3 wheels on one side and a guide up front running 3.3g wheels and they wouldn't let us run it because they had never seen nothing like that and it needed to look normal. I remenber that year I was thinking of doing the same thing |
|
|
|
Post by W Racing on Jul 23, 2009 23:00:58 GMT -7
My favorite part of the rules: Cars not meeting the specifications will be allowed to modify the car to meet the qualifications prior to registration. Self modifying cars. What will they think of next... I would get clarification in writting about the should portion of: The area where the axles are inserted should be approximately 1 3/4 inches wide. Narrowing the front end of the car is a major speed advantage to keep the rear wheels of the rail. It will be a blast just don't get DQd on the rules of course :-) |
|
|
|
Post by W Racing on Jul 23, 2009 23:18:51 GMT -7
If you do put three wheels on one side you could always switch the wheel location at checkin if needed.... ;D
|
|
|
|
Post by azgreg on Jul 23, 2009 23:21:55 GMT -7
I haven't heard back from district or council yet, but I think I know what I am going to do. I will make the wheelbase on the DFW side at 4 5/8'" and the raised wheel side at 4 1/4".
|
|
|
|
Post by W Racing on Jul 24, 2009 0:58:27 GMT -7
I would practice on the car and make a few and send them into PDDR until they get faster and faster... Perhaps in the stock class. Lots of fun... |
|
mac10
PURE STOCK
[Mo0:0]
Posts: 11
|
Post by mac10 on Sept 11, 2009 17:48:20 GMT -7
hi guy,
I am kinda new here but I have been reading alot of posts but I have a question for you what happens if you move your wheel base closer in and not extended what would happen then??
thanks
|
|
|
|
Post by P D D R 2 on Sept 11, 2009 19:38:11 GMT -7
hi guy, I am kinda new here but I have been reading alot of posts but I have a question for you what happens if you move your wheel base closer in and not extended what would happen then?? thanks Are you thinking of making the wheel base even shorter than it comes? Ouch.... much harder to tune the car if the wheel base gets shorter.... I think a whole lot of guys will agree with that... Or if your talking about making the wheel base narrow in the front..... that is highly recommended keeping the fronts wheel just slightly narrower than the rear wheel width... |
|
|
|
Post by W Racing on Sept 12, 2009 22:36:57 GMT -7
I agree with David....
Going shorter than 4 3/8" on the wheelbase (Standard BSA spacing using slots) is hard to align.
Given a choice place the rear axle as far back as possible.
Most people will also place the front wheel as forward as possible. However for BSA stop sections backing the front wheels off 1/8 to 1/4 inch will help protect the front wheels. Not an issue on the PDDR speedway.
As you move the front axle back you get more weight on the front wheel for the same COM.
A fully extended wheelbase is 5 3/4" (5 1/2 " with front wheels backed off) and it is most often used when allowed. However the Jewkes and others have made very fast cars with the front wheel backed off considerably....
There are gains if you know what you are doing and have very good alignment...
|
|
