A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

[Group4_Mark2]

Re: A racing bmw 316, 240bhp Atmo M10

Graham,

Do you recon you would get much more power if you were able to run an open / side exit exhaust with no silencers which were tuned to the rpm range of the car?

Tom

[Graham]

Re: A racing bmw 316, 240bhp Atmo M10

i certainly think there would be something to be had, dave collridges (sp) duratec engined escort run with just a manifold no system at all, even adding a short length of straight pipe dropped power a bit,

as far as my car goes, as it sailed through noise testing all last year i recon i can get away with running just 1 silencer which if the text books are right will reduce back presure a bit and give me more room under the car so i can remake the 2 into 1 section of the manifold, the plan is to make it adjustable like a trombone so i can try differing length secondaries

[bmw02rally]

Re: A racing bmw 316, 240bhp Atmo M10

Hey Graham,

Just found this thread.....you gave me a lot of advice when I had my rally 2002 back in 2007.

Great to see you going back to the M10 and finding it power limits!!

I have joined the masses and bought an Escort now as its just easier and better on my budget. I still help a mate out with his sprint/Hillclimb 02 though. Also having a classic car in Queensland means I'm not battling rust so much as I was in Wales, Even suspension and brake components come undone without using heat...woohoo!!

Good luck with the car.

Mark J

[Retromotorsport]

Re: A racing bmw 316, 240bhp Atmo M10

Graham, cut all the firewall/seat bulkhead out, and replace with an ally sheet.

[Pushrod King]

Re: A racing bmw 316, 240bhp Atmo M10

Gary,the 2010 rules state that the standard floor pan, sills, door surrounds, bulkheads and roof must remain exactly as produced by
the manufacturer in construction, dimension and material. it is prohibited to cut any holes or remove
any fixed panels from the standard floor pan, front or rear inner or outer wheel arches, front or rear
bulkheads (engine to habitacle and habitacle to boot)

[Graham]

Re: A racing bmw 316, 240bhp Atmo M10

Gary,the 2010 rules state that the standard floor pan, sills, door surrounds, bulkheads and roof must remain exactly as produced by
the manufacturer in construction, dimension and material. it is prohibited to cut any holes or remove
any fixed panels from the standard floor pan, front or rear inner or outer wheel arches, front or rear
bulkheads (engine to habitacle and habitacle to boot)

as did the rules for 2009,2008,2007,2006,2005,2004,2003,2002,2001, not sure about any further back i wasnt involved then.

[Group4_Mark2]

Re: A racing bmw 316, 240bhp Atmo M10

i certainly think there would be something to be had, dave collridges (sp) duratec engined escort run with just a manifold no system at all, even adding a short length of straight pipe dropped power a bit,

It would have been intersting to see if Dave Collridge had put a trombone type extension to the exhaust pipe if he could have gained power by tuning the length to suit the RPMs that the motor was running. A few forums which I read in the US recon that the exhaust pipe length from collector to the open air can have a large effect on the power produced by an engine if no silencer is used.

[Pushrod King]

Re: A racing bmw 316, 240bhp Atmo M10

as did the rules for 2009,2008,2007,2006,2005,2004,2003,2002,2001, not sure about any further back i wasnt involved then.

Didn't realise that it applied to the rear bulkhead before! That means that there are at least two cars that I know that don't comply

[david_white]

Re: A racing bmw 316, 240bhp Atmo M10

Then again neither do the ones with aluminium boot floors...

[Pushrod King]

Re: A racing bmw 316, 240bhp Atmo M10

Then again neither do the ones with aluminium boot floors...

Who's got an alloy boot floor? Not one of the ones with no bulkhead I hope

[david_white]

Re: A racing bmw 316, 240bhp Atmo M10

Graham, cut all the firewall/seat bulkhead out, and replace with an ally sheet.

Can't see anyone having a problem with doing that, its the way most other cars are done and it will look neater.

[Graham]

Re: A racing bmw 316, 240bhp Atmo M10

Can't see anyone having a problem with doing that, its the way most other cars are done and it will look neater.

bearing the rules in mind, to deliiberately cut out what was a steel bulkhead (which is reinforced in the middle) simply to save weight isnt really on,

it would be a slightly different matter (although not as far as the rules are concerned) if the car was origonally prepared i such a way because it raced in another championship where such a mod would be legal

[Pushrod King]

Re: A racing bmw 316, 240bhp Atmo M10

it would be a slightly different matter (although not as far as the rules are concerned) if the car was origonally prepared i such a way because it raced in another championship where such a mod would be legal

I would think/hope that if a steel bulkhead was replaced with an aluminium panel it would only become a problem If the car won all of the time and/or another competitor raised the matter.

[Tristan]

Re: A racing bmw 316, 240bhp Atmo M10

I think it's just Grahams scrupulous sense of fair play preventing him from taking advantage lol !

[Group4_Mark2]

Re: A racing bmw 316, 240bhp Atmo M10

Nothing wrong with a sense of fair play.