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

[robt100]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

Sounds like a pretty good result in the end Graham, and this one doesnt blow up every 5 mins

Might come along to the august race at brands, my friend has quite a fancy camera so should get some nice shots

[Graham]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

and this one doesnt blow up every 5 mins

got to admit after hearing that one 20 times a day in the paddock im getting hacked off with it! the turbo install was complicated and there were a lots of bugs to iron out but it finished a lot more often than it didnt, its just everyone notices much more when i dont! the turbo engines them selves were actually very reliable, it was bits around the edges that used to cause problems, what actually killed the turbo motor was oil surge, this one cannot as its dry sumped, the turbo was a bit prone to eating the filter housing gaskets, this one again because its dry sumped and the goes back into the block via a screwed in pipe, so had i been turbod still the two main modes of failure would be eliminated,

although i will say im enjoying the intrinsic simplicity of the N/a engine

[carpmart]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

The race write up makes for a good read!

[robt100]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

got to admit after hearing that one 20 times a day in the paddock im getting hacked off with it! the turbo install was complicated and there were a lots of bugs to iron out but it finished a lot more often than it didnt, its just everyone notices much more when i dont! the turbo engines them selves were actually very reliable, it was bits around the edges that used to cause problems, what actually killed the turbo motor was oil surge, this one cannot as its dry sumped, the turbo was a bit prone to eating the filter housing gaskets, this one again because its dry sumped and the goes back into the block via a screwed in pipe, so had i been turbod still the two main modes of failure would be eliminated,

although i will say im enjoying the intrinsic simplicity of the N/a engine

My apologies graham, didnt know you were getting stick from it by others.
Glad to see your enjoying the N/A route though, On another note, whats the rules on undertrays etc in your championship?

[Graham]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

front spoiler is pretty much free and so too is a rear one within hieght restrictions that aside no "areo" mods alowed, so whilst you could incoroprate somethinmg in the front spoiler/spliter going any further back than the bumper is likely to get a keen interest from the eligability scruit

[robt100]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

No ducts inside the front bumper then for brake cooling? Might be worth doing a bit more theory on the spoilers. Ever heard of Catia? Think its some kind of CFD programme, might be able to do some bits on there (a friend has it)

[david_white]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

[quote=robt100;1589821]No ducts inside the front bumper then for brake cooling? [quote]

Atm the extra heat generated by the brakes may well be helping to heat the tyres as the wheels dispate the heat, duct them and the tyres may get even colder / harder which could be a problem. I guess we'd need to do a proper test of the temps to get a fuller picture though

[robt100]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

Atm the extra heat generated by the brakes may well be helping to heat the tyres as the wheels dispate the heat, duct them and the tyres may get even colder / harder which could be a problem. I guess we'd need to do a proper test of the temps to get a fuller picture though

I see my subtle hint was too subtle . What I meant was put "ducts" in as extra wings for the downforce under the bumper. think of it as a front diffuser

[GavinR]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

Well done Graham, sounds like you're enjoying yourself

[mk2stu]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

plus the other downside tp less weight is less heat in the tyres aswell i supose?

is their much more you do to better distribute youre weight without spending much? and maybe playing with ure suspension settings to match the engine?

[Graham]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

when it comes to weigt distribution thers not much you can do really, almost always when you strip out a car for racing you end up lightening the back end more than the front, you can compenstate a bit by moving the fuel tank and battery to the rear and get yourself sitting as far back as poss, im so far back that if you were to put teh rear seat back in the rear passengers would have just 0.5 inch legroom, but as i've already done all the above i shall just have to suffer the rear getting lighter

[mk2stu]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

im guessing that the aerodynamic work is kinda at it its best befire having to spunk loadsa money on it to make the any noticable difference?

[Graham]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

im in weight saving mode now,

i statred by comparing one of my slick shod 10x8 against a wet shod 9.5x17 split rim, when i bought the 18's compomotive did tell me that with thay design i wouldnt save much by going to split rims, they werent wrong, the difference between the two was just under 2kgs, so i wont be slashing out cash on more wheels any time soon, £2k to save 8kgs really isnt worth it





next i started to think about what i could unbolt, first to go was the electric fan with its wiring and some other gubbins, even in sundays heat at brands the engine ran cool desipite being gridded up twice and the hanging around after the red flag, it would save more weight to keep the fan and fit a smaller rad which would also hold less water but this way is free


finally for now the rear bumpers off, i prefer the car with it and its had a good few "taps" over the years without me suffering any damage, but if im ever going to get near the fwd cars a bumper is a luxary that i cant afford to carry round, i also trimmed a bit off the end of the exhaust as it stuck out rather too far without a bumper

the cars weight should now be down to 919kg so i've still got a long way to go

[david_white]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

How about the mirrors Graham? lighter ones are quite cheap and if yours are std they are normally quite heavy. Also how about LEDs instead of the front lamps and do what we've done to the rear lights, remove the big bulb holders and just stick an led cluster straight into a grommet where the lamp normally sits.

It would be great if you could get a single skin fibreglass boot and perhaps mount a lighter wing off of the sides of the boot shut Your boot is still pretty heavy with the wing on !

Obviously things like a race battery would help but that then gets a bit dearer..

[Graham]

Re: A racing bmw 316, hopefully the worlds most powerfull Atmo M10

front head lamps are actually spot lampps lit with leds.

mirrors will stay, i know they are heavy but they are very robust and work well so i donrt want to change them for some crappy mrror which does give me a good reward view, i will probably take out the interior mirror as its useless

the bare boot lid itself isnt actually that despite being steel because its been reduced to a single skin, it weighs 6kgs, less if i drill a few holes in it i cant justify buying a grp one the cheapest i could find last time i looked was £150

the spoiler though weighed 10kg, and is in the process of getting lighter right now

i do have a varley, but im very weiry of using it ive almost dnf'd with flat batteries in the past, so i'll use use a smaller normal battery for now dont forget at the moment i run no charging system, i might use it next year as the rules for 2010 mean i will have to fit an alternator