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Cars, because you can't get enough kicks out of walking fast. -
Re: A racing bmw 316, 240bhp Atmo M10
Thats what I meant . It'd be all too easyfor him to use his influence to pull a fast one , but instead he's staying within the letter of the law.Comment
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Re: A racing bmw 316, 240bhp Atmo M10
its not quite true to say i write the rules, i have an fair sized input and the final wording is usually mine but they are written by a committee, so apart from my own natural sense of fair play im sure i wouldnt get away with making them too favourable to myself, some of the rules like the ones that dont allow the removal of said panel are so old i dont know where or who wrote themComment
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Re: A racing bmw 316, 240bhp Atmo M10
it makes sense though , to stop people getting carried away lightening , and weakening the shells IMO.Comment
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Re: A racing bmw 316, 240bhp Atmo M10
As Graham has said , if the car is built to a known formula then its allowed, or every Gp4 Escort (historically correct) would be banned.
And as we have had escorts mentioned.. a 68 has a no hole bulkhead, post 68 and you have the 3 or 5 hole BH, and post 75 .. no BH at at all... well a piece of black painted hardboard. Along with some Oddball shells that had early BH's and early shells without BH's ... (some export mk2's had BH's, some Mk1 domestics went out without them... guess they forgot to fit it.
The weight loss in replacing a pressed steel bulkhead with an alloy one is negligble ... we are talking grammes, not kilos, and if we start getting too serious about this, you'll have the richer racers getting the shells dipped, salt sprayed and re-dipped .. 30% thinner panels, means 100kg off a 300kg shell and a good championship will head the way the historics with their stringent archane rule are going... the man with the money to re-build the engine every race wins.. a BDA screaming at 10,000 rpm will out perform a limited to 9k engine from the same engine builder.
And if we are getting finicky about rules ....
"to deliiberately cut out what was a steel bulkhead (which is reinforced in the middle) simply to save weight isnt really on,"
But, as the rules allow bulkhead, dashboards etc to cut to allow rollcage fitment, without specifiying an ammount to cut ... leave a 2mm strip of the bulkhead there to allow easy fitment of the cage .
Lets not go down the route of 4" diameter fuel pipes of 20 times the length of the car route on rules..
Its a friendly championship... because of the rules and the people writing them, and running it.
Anyway, Back to Grahams car...... cut it out mate, i wont raise an eyebrow
Last edited by Retromotorsport; 09-01-2010, 01:22.Comment
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Re: A racing bmw 316, 240bhp Atmo M10
Who mentioned Escorts Gary?Comment
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Re: A racing bmw 316, 240bhp Atmo M10
Whats that all about Gary?Comment
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Re: A racing bmw 316, 240bhp Atmo M10
a cheat to get round a limited fuel tank size, doesnt work with fuel injection though....................Comment
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Re: A racing bmw 316, 240bhp Atmo M10
if you enforced the rules to the letter even those escorts would be banned,
as most of us know there are lots of minor rule infringements in lots of the cars, which give no advantage and at our level not worth getting picky over, but im not going to deliberately break a rule where there really is no need to, everyne can clearly see it and performance adavantages are very very minimalComment
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Re: A racing bmw 316, 240bhp Atmo M10
anyway back to the thread, after more grinding etc i was ready to start the cage reinstall, as per usuall with a cage from custom cages ist doesnt fit! and i've had to trim some of teh tubes, but eventually i got the main hoop, front legs and screen bar all in postition and tacked then together, a task nearly impossible single handed, luckily i had just bought a portapower and by using teh door bars a temporay wedges mainaged it,
once done the cage is dropped through teh floor to fully weld the joints
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Re: A racing bmw 316, 240bhp Atmo M10
sorry about the crap pics my phone cameras now full of iron filings from grinding.
a bit more progress, i jacked the cage back in and fitted the back stays and diagonal, the diagonal was a complete arse t fit, being both the wrong length and having the notiches in the tube cut to the wrong angle, lots of work with an angle grinder fixed it
in the second pic you can just make out the remants or the origonal cage consisting of the dash bar and front stut mounts, still got the drivers door bar to fit and rebuild the floor under the cage feet,Comment
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Re: A racing bmw 316, 240bhp Atmo M10
ok not yet repaired the fllor under the main hoop or front feet but the cage is otherwise fully in and welded
but it looked oh so little, i ended up putting the X's back in the door bars, they dont add a huge amount more side protection but must help as was as making the whole affair more rigid
not sure pre painted weld in cage bars will ever catch on though
and as you might see i've pulled out the worst of the dent in the n/s sill from where john cross took a bite out of itLast edited by Graham; 12-01-2010, 12:26.Comment
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Re: A racing bmw 316, 240bhp Atmo M10
the rest of you wont know but gary and i have been having an on going disgussion regarding roll cages,
i want less cage to save weight, gary says more cage adds performance with rigidity, the truth is were both right, assuming the shell wil benifit from great rigidity then yes more cage should give better performance in corners, the down side is weight, in an overweight car which is practically on its ceiling as far as weightloss and power gains go then more cage will hurt performance.
i was going to stop with the basic cage, well aware of torional rigidity gains from xing the door bars i did that, then the plan was to stop! gary wasnt keen, feeling that i should at the very least turn the main diagonal into an x as that will brace it and stop it bending, luikewise i should also pick up on teh main hoop where the door bars attach and run tube back to teh turrets,
with a bit of thought i realised it would be lighter to add a belt bar to the cage than reinforce the bulkhead and run snap hooks etc, a bit more thought i realised the belt bar would triangluate the diagonal to the back stay, a good move, and so ended up adding a passenger belt bar also!
standing back i realised with two very short lengths of tube i could brace the main hoop to the diagonals and so added yet more tube! but thats it i stop now!
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Re: A racing bmw 316, 240bhp Atmo M10
how much weight do you think ull save then graham? and how much do you think youve saved from high in the car?
thoubht you said NEVER NEVER NEVER buy a custom cage:-)do ya like dagsComment
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