Engineered rule bending

Engineered rule bending

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Discussion

Tonsko

6,299 posts

214 months

Friday 9th January 2015
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It's justaredbadge and he was being mysterious about current adjustments that pass scrutiny but give an advantage.

justaredbadge said:
With a bit of clever thinking you can legally run an element of limited slip on any open diff. It will always pass scrutineering and will pass a full strip down and inspection procedure.

The fford I prep has this and has been inspected and passed by an experienced brscc s cut in e'er
justaredbadge said:
Erm. I don't want to give the game away...so ill say that all the standard parts of the open diff are used. No parts are added and no machining is done at all.


I can't really say more than that as we are still using it. Sorry.
Edited by Tonsko on Friday 9th January 07:48

williamp

19,213 posts

272 months

Friday 9th January 2015
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I think I preferred him when he was that Saab fellow. Less mysterious

DanielSan

18,745 posts

166 months

Friday 9th January 2015
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PhillipM said:
Kinda makes you wonder, why bother saying anything? ...
Saying nothing doesn't give someone attention...

Some Gump

12,671 posts

185 months

Friday 9th January 2015
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Hold on, so is JARB not the same chap as JAYB? I presumed he just changed his car, a bit like Soovy's ever changing name.

No that it matters, he's not going to let any of us know how his open diff can suddenly become an expensive limited slip diff (thus putting Quaife, Titan et all out of business overnight) - so none of us can call custard on it. Which is a pity - because in my mind I'm thinking custard, but I'm very often proved wrong =)

TobyLaRohne

5,713 posts

205 months

Thursday 15th January 2015
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What a great thread! I've just read it from start to finish, we have all sorts of dodgy goings on in our championship but to be honest I find it funny rather than offensive, like the guy with a new "stock" cylinder head from the UK that magically had him cutting seconds from his lap time.
We have a "stock"1.8l Honda CRX that spanks my 2.0l K20a Civic in a straight line and we also have a Lotus with a full spec race engine in his Lotus Exige (in a touring car class) where the engines are meant to be stock.

Its all fun and games though!

One of the best ones I've seen is someone who is currently using an adjustable "device" to control the effect of side stepping the clutch at drag racing so his car doesnt bog down or spin the wheels (I forget which it is) and it also gives identical launches every time.


slinky

15,704 posts

248 months

Thursday 15th January 2015
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TobyLaRohne said:
One of the best ones I've seen is someone who is currently using an adjustable "device" to control the effect of side stepping the clutch at drag racing so his car doesnt bog down or spin the wheels (I forget which it is) and it also gives identical launches every time.
Adjustable CDV, a la BMW?

PhillipM

6,515 posts

188 months

Thursday 15th January 2015
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Some Gump said:
so none of us can call custard on it. Which is a pity - because in my mind I'm thinking custard, but I'm very often proved wrong =)
Custard would work pretty well too....

MartG

20,622 posts

203 months

Friday 16th January 2015
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PhillipM said:
Some Gump said:
so none of us can call custard on it. Which is a pity - because in my mind I'm thinking custard, but I'm very often proved wrong =)
Custard would work pretty well too....
Ah - non-Newtonian fluid.....

Tonsko

6,299 posts

214 months

Friday 16th January 2015
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MartG said:
Ah - non-Newtonian fluid.....
thumbup

cirian75

4,245 posts

232 months

Friday 16th January 2015
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MartG said:
Ah - non-Newtonian fluid.....
Ketchup is too wink

McSam

6,753 posts

174 months

Friday 16th January 2015
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This thread is a great read, glad to see it resurface!

I've seen a different noise test circumvention to the rally cars with switching dash displays or boost limitations, simpler but still effective! In these cars, which I'd best not name since some teams still do it, most of the original dashboard remains but with the usual killswitches and an electronic race dash added. If you start the car up, then hit the killswitch at idle the analogue tacho doesn't drop. Bizarrely, on restarting the car it doesn't zero itself, so your idle now reads 800rpm or so higher than it actually is. Do this once more and in the 4500rpm noise test, the engine's actually turning under 3000rpm and plenty quiet enough to get through.

Since all the drivers use the additional dashboard for their shift points, and this does reset itself and work properly, it's no problem even if you get tested right before going out on track!

TobyLaRohne

5,713 posts

205 months

Sunday 18th January 2015
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slinky said:
Adjustable CDV, a la BMW?
Afraid I dont know, but I do know it works and its quite illegal.

PhillipM

6,515 posts

188 months

Sunday 18th January 2015
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They're pretty common, you can buy them off the shelf.

mad4amanda

2,410 posts

163 months

Sunday 18th January 2015
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Some Gump said:
Hold on, so is JARB not the same chap as JAYB? I presumed he just changed his car, a bit like Soovy's ever changing name.

No that it matters, he's not going to let any of us know how his open diff can suddenly become an expensive limited slip diff (thus putting Quaife, Titan et all out of business overnight) - so none of us can call custard on it. Which is a pity - because in my mind I'm thinking custard, but I'm very often proved wrong =)
Think its more likely to be spacers and shims made of an alloy which when tested when cold are open diff but expand as they get hot and become locked when they cool it goes back to being open.
That`s what a scruitineer told me so I wouldn`t be too sure they are not aware !

andygo

6,786 posts

254 months

Sunday 18th January 2015
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mad4amanda said:
Think its more likely to be spacers and shims made of an alloy which when tested when cold are open diff but expand as they get hot and become locked when they cool it goes back to being open.
That`s what a scruitineer told me so I wouldn`t be too sure they are not aware !
Seems like more trouble than its worth?

andygo

6,786 posts

254 months

Sunday 18th January 2015
quotequote all
mad4amanda said:
Think its more likely to be spacers and shims made of an alloy which when tested when cold are open diff but expand as they get hot and become locked when they cool it goes back to being open.
That`s what a scruitineer told me so I wouldn`t be too sure they are not aware !
Seems like more trouble than its worth?

Tango13

8,396 posts

175 months

Wednesday 21st January 2015
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James Whitham who rode for Suzuki back in the day was struggling for speed due to his bike being a much older design than the bikes he was racing against.

At the time the premier British championship was run to Superbike rules, 750cc 4 cylinders or 1000cc twins. By the midpoint of the season it was time for Snetterton and Whitham manged a couple of top ten results in the two Superbike races.

After the Superbike races it was time for the annual Race of Aces so after a quick engine swap James Whitham lined up on the grid and promptly blew everyone into the weeds!!

Post race the cries of 'foul' were echoing down pitlane before someone put their money where their mouth was and paid for a strip down. Sure enough the Suzuki was discovered to be 880cc but just before Whitham was disqualified his team manager Mick Grant casually enquired if anyone had read the rules?

The Race of Aces was being run to 1300 Open rules that year...




cirian75

4,245 posts

232 months

Thursday 22nd January 2015
quotequote all
Tango13 said:
James Whitham who rode for Suzuki back in the day was struggling for speed due to his bike being a much older design than the bikes he was racing against.

At the time the premier British championship was run to Superbike rules, 750cc 4 cylinders or 1000cc twins. By the midpoint of the season it was time for Snetterton and Whitham manged a couple of top ten results in the two Superbike races.

After the Superbike races it was time for the annual Race of Aces so after a quick engine swap James Whitham lined up on the grid and promptly blew everyone into the weeds!!

Post race the cries of 'foul' were echoing down pitlane before someone put their money where their mouth was and paid for a strip down. Sure enough the Suzuki was discovered to be 880cc but just before Whitham was disqualified his team manager Mick Grant casually enquired if anyone had read the rules?

The Race of Aces was being run to 1300 Open rules that year...
http://www.visordown.com/column-james-whitham/jamie-whitham-column---jul-2005/2365.html

888cc and big Rob saying "What... the ****... is THAT?"


priceless

Tango13

8,396 posts

175 months

Monday 26th January 2015
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Just thought of another one although it's not really cheating.

Back in 1991 the FIM increased the minimum weight limit for the 500 GP class from 120kg to 130kg to slow things down a bit, the result? Manufacturers started to make their engines from aluminium instead of magnesium so horsepower went from around the 160bhp mark to 200bhp!

Tonsko

6,299 posts

214 months

Monday 26th January 2015
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Is that because Al is heavier & stronger and can therefore be bored etc. more aggressively?