Classic Thunder Build - Duracel79 - England

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Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Well that took a while but i've added ~original to the pictures in the whole thread.
Strange as I could see all the images before and after the change.


1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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Jeroen
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Re: Classic Thunder Build - Duracel79 - England

Post by Jeroen »

Thanks for all the updates, enough going on over there to keep you busy! Any idea what caused the oil starvation? Usually the ///M engines are well protected on that front afaik.
Regards/groeten, Jeroen
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Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Jeroen wrote:Thanks for all the updates, enough going on over there to keep you busy! Any idea what caused the oil starvation? Usually the ///M engines are well protected on that front afaik.
With the previous install in the Yellow car, the sump was modified with a small capacity (~4.5litres) to allow the engine to be stood up taller away from the RHD brake setup. This works fine for road use and track use with trackday style tyres.
Once I'd added the splitter/diffuser and slick tyres, it is now generating much more cornering forces.
I can see from my on board videos of Brands Hatch the oil pressure dropping to near zero psi through most right hand corners (the standard oil light only flickered once as they are only set for 5 psi) and flicking back up once in a straight line.
After 8/9 laps of that the bearings would have been worn, got hot and one big end decided to seize when lifting off the throttle, snapped the rod and the rest became a bit mess :( .

The new engine is now back at the correct angle with a standard E34 M50 sump with a baffle and I have also fitted an accusump system that retains oil pressure to be released into the engine if any starvation occurs. The oil pressure doesn't go below 40psi now at any point on track.
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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Jeroen
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Re: Classic Thunder Build - Duracel79 - England

Post by Jeroen »

OK takes quite some money and efforts, but better now!
Regards/groeten, Jeroen
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Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Some good fun at the BHP show at Lydden Hill, bedding in brakes and being gentle on the brand new engine

Image

https://www.youtube.com/watch?v=j8FIvQ8Agm4&t=0s
Last edited by Duracel79 on Tue Jan 26, 2021 9:50 am, edited 3 times in total.
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
User avatar
Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

On to Mallory park and the first race meeting of the year for me

https://www.youtube.com/watch?v=Bs76TF6fvxg&t=0s
Last edited by Duracel79 on Tue Jan 26, 2021 9:50 am, edited 2 times in total.
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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Duracel79
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Joined: Thu May 29, 2008 6:54 pm
Location: Stevenage, Hertfordshire

Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Some pics from Snetterton in September

Image
Image
Image
Image
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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Mihajlo
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Re: Classic Thunder Build - Duracel79 - England

Post by Mihajlo »

That’s a proper way to use an E21
Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the rear of the car.
Horsepower is how fast you hit the wall. Torque is how far you take the wall with you.
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uwbuurman
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Re: Classic Thunder Build - Duracel79 - England

Post by uwbuurman »

Great!!
It's the man next door!

1978 BMW 323i
1980 BMW 528i maior restitutio
1987 BMW 325iA cabriolet
2006 BMW 320d touring High Executive
2015 BMW 320dA touring xDrive High Executive ///Msport
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Jeroen
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Re: Classic Thunder Build - Duracel79 - England

Post by Jeroen »

:thumbsup :thumbsup :thumbsup :thumbsup :thumbsup :thumbsup :thumbsup
Regards/groeten, Jeroen
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Peter V.
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Re: Classic Thunder Build - Duracel79 - England

Post by Peter V. »

Very nice view!
Gr Peter V.

.Some say he eats nuts and bolts for breakfast, all we know is he is called the carburetorman.

BMW E21, 1981 320/6 Ascot Grau.
BMW E85, 2004 Z4 2.5i Sterling Grau.
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Re: Classic Thunder Build - Duracel79 - England

Post by Jeroen »

And the engine is keeping well now?
Regards/groeten, Jeroen
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Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Jeroen wrote: Mon Jan 21, 2019 6:46 am And the engine is keeping well now?
All good so far, in the video's you can see the central gauge is oil pressure and keeps over 40psi+ everywhere now
I just need more seat time to get confidence to push the car harder.
Biggest improvement would be to upgrade the squidgy bit attached to the steering wheel. :bag
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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Duracel79
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Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Mihajlo wrote: Sun Jan 20, 2019 7:25 pm That’s a proper way to use an E21
Used as intended :launch :rev :driving
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
User avatar
Duracel79
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Location: Stevenage, Hertfordshire

Re: Classic Thunder Build - Duracel79 - England

Post by Duracel79 »

Peter V. wrote: Mon Jan 21, 2019 5:18 am Very nice view!
Thanks. its always a good view from any E21's driving seat :cheers
1982 323i (S54 "Test Mule" - to be rebuilt into M20 powered track car)
1983 316 (Taiga Thunder - The refined S54 Race car)
1982 635csiA (New project)
1985 728iA (For Sale)
2004 330d Touring (The Daily Hack / Tow Car / Load lugger)
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