Rebooted...

 My project has been picked up after 15 years of break... if you wanna see updates you can follow me on

Instagram: https://www.instagram.com/bmwe21turbo/

Youtube: https://www.youtube.com/@WhereistheVINnumber/videos

Something about my wheels... "The wheels!"

In my opinion that is necessary to put that power on the road. Otherwise you wont be able the use the power under your ass! Would be nothing but burn-out! So I found a "wide" wheel which has 4x100 stud pattern. :) ACT BBS RS1 front wheels are: J8x16 and Dunlop Sport 2000 205/45R/16 tires and rear wheels are J11x17 ET12 with Bridgestone Potenza S-03 245/45ZR/17 tires on it. :)

at the beginning... Subframe and differential...

As I mentioned before the first cassis was very rusty I would say "sieve". :) So I`ve just swapped for another one. First one was a black one the new base is a blue one. That`s why you can see on some pictures black and on others blue E21 body. By the first plan I wanted to install and use an E30 (E34) small or medium case diff. Why? You have more chance of finding an E30 LSD then an E21 LSD. (I also have to mention the big difference between the price and the ratio range.) I found unsolvable of putting the E30 diff into an E21 subframe. It just wasn`t. :) That was the first lesson if you really want something YOU CAN DO IT! We had cut off the midde part of an E30 and an E21 subframe and we just welded the E30 frame into an E21. :) Voila! It`s done:

 

As the E30 diff wider than E21 diff I had to reduce the length of the half axles by 15mm. It was the first plan and plans have always been changing. :) This modification above happened in ~ 2005 and I just changed my mind lately. :) Why again?? :) Because E30 small and large case diffs are just also not strong enough (TYP 168 and TYP 188). So Im selling my small case E30 non-LSD diff with 3.38 ratio. As I discovered on forums there are couple of diffs which have 210 large case and also just simple bolt on E30 (E34) subframe. This one: 

 

This diff case is from BMW E23. Part no: 33111210410 (but there are some other big 210 diffs which fit to E30 subframe too) (Pictures from Powerfanatics.com)

This large case 33111210410 differential is available in: 

E23 733i Saloon, USA 

E23 735i Saloon, USA 

E23 728i Saloon, Europe 

E23 728iS Saloon, Europe 

E23 732i Saloon, Europe  

E24 633CSi Coupé, USA 

E24 635CSi Coupé, USA 

E24 628CSi Coupé, Europe 

E24 635CSi Coupé, Europe  

E28 524td Saloon, USA 

E28 528e Saloon, USA 

E28 533i Saloon, USA 

E28 535i Saloon, USA 

E28 518 Saloon, Europe 

E28 518i Saloon, Europe 

E28 520i Saloon, Europe 

E28 524d Saloon, Europe 

E28 524td Saloon, Europe 

E28 525e Saloon, Europe 

E28 525i Saloon, Europe 

E28 528i Saloon, Europe 

E28 535i Saloon, Europe 

E28 M535i Saloon, Europe

It does fit to E30 subframe and also has large case. How will you know it is a medium or big case differential if you are not an expert? Big TYP 210 diffs have 8 bolts for the side bearing seals.

Well I just couldnt find 210 big case differental which fits to E30 subframe therefore I`ve bought my new diff which came off an E36 M3 EVO 3.2. The greatest thing in this diff is the ratio. Just that I wanted to get. 3.23 and LSD. :) This ratio satisfies me. Under this ratio it would`ve been too long or over this ratio probably I would`ve have found it too short. Now I just have to find an E46 320d 6 speed (GS6 37DZ) gearbox. This gearbox has this ratio:

I 5.14
II 2.83
III 1.79
IV 1.26
V 1.00
VI 0.83 

This gearbox`s bell also wont fit to M20 engine. :) but... no worries mate! :)

Of course this E36 M3 diff wont fit onto my modified E30 subframe eighter because this M3 diff housing is different. Just to make me happy. :( So... probably I wont be able use my E21-E30 hybrid subframe that I had modified. Instead I have to modify my spare E21 subframe. But that story will be continued in next summer. And some pictures of my new TYP 210 big case E36 M3 EVO diff was bought for 170 quid:

(Well.. when I brought it home my wife just shouted at me "What a f..ck is this piece of oily metal shit doing on my corridor??" Lack of respect for BMW! Shame on her!)

Im planning to modify the closing ratio of this diff from 20% to 40%. But this modification will cost another £150.  

Lets get started...

Well... however a lot to write I wont start to explain everything from the beginning because sometimes I wont have time or because this building takes that long I wont remember every details. I hope my pictures will talk...
I dont expect visitors or comments but if someone will visit my "blog" then have a nice time spending.

I started to build this car maybe six years ago. Why? Because I love this shape of BMW. This car has been my second car after a Lada 1200. :) Plenty of memory of mine belong to this car and I just wanted to do something with it. Something that makes me happy and keeps my memory and my youthness in a car in a garage. I will never forget that feeling what this car has given to me every time when I put my ass into it. Its legendary BMW E21 dashboard around me when I sit in. I wanted to keep this shape and interior but I also wanted to change everything that I dont like.

So... At that time I decided not to sell it. I kept it. (for a while :) The original body was black and fuckin` rusty. I was necessary to find a younger body instead. Well I have found a younger blue one. Unfortunately the original black one had to go to the scrap yard.


I planned to build an E21 Turbo with an M20 engine. A lot of people install an M30 in their E30 because there are bigger engines (more raw power) available. In my opinion they`re just simple too heavy and M20 also contains unused power. That was proved by many people on the web.

Eg. Keld Jakobsen`s BMW E21 M20B27 in 2006

"Bilen får en helt ny M20 motor med en blygsam spec:  M20B25 block, deckat, o-ringat, stressborrat till 84.50mm, fabriksny smidd dieselvev som är balanserad till perfektion, oljekylning under smidda CP pistons, 135mm AutoVerdi vevstakar, PPF stödgördelkit med ARP ramlagerpinnbult, ARP pinnbultar till toppen, PPF 75mm dump, PPF grenrör med 60mm PPF wastegate och en PT76GTS turbo, 895cc spridare, Autronic SM4 styrsystem, MSD DIS4 CDI tändning med MSD spolar mm." 


600 HP at 1,5 bar
677 HP at 1,8 bar
820 HP in 2007 by an M20 turbo.

I still believe in M20 power however M50, M52 and other 4 valves engines are potentially improving combustion efficiency and hence power. In my country (Hungray) isnt that simple. We are not allowed to install "foreign engines" in our cars by law. Thats also a big joke and would deserve another blog but not now. Thats why I vote on M20 Turbo.

The base has been an M20B25 engine with 885 big valve cylinder head. What do I want? A strong and stable M20 engine over 300 HP and just for fun. No drifting no drag racing. If I start to do something or decide to do something I wont stop. It must be done! Even if I have to make sacrifices but it must be done without "risk".

If you have ever started or even your were in car building you should know it takes fuckin` a lot money. Well.. when I started I made clear something in myself. It might not cause any problems in my personal life or in my relationship and it may not cause financial problem for me. Ok... too much talk.

On this first picture my new BMW E21 body with a slice of lorry intercooler which wont be installed. Why? Because I sold it already. :) It was impossible to squeeze behind of this shark front. It needs a custom cooler:

Isnt big but small space doesnt let make bigger one. :( Hopefully this cooler will be done in next summer as I want to finish this building finally in next year. I have more important tasks to finish first.

To be continued...