My Alpina B2 powered 3.0CS
- Thread starter JamesE30
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Hi, It's an Alpina B2 rebuilt to original spec.
Pinao top pistons
300* Alpina camshaft
Solex 40DDHT carburettors
This photo is so quintessentially German right down to the tile workshop floor and the jumpsuit. Very few BMW tuners are running engine dynos, which is the biggest giveaway.
I am enamored with your motor. I want the same setup, just with my 3.5 as a start. You have me convinced that I need those headers. I’m curious to know if they clear the washer tank without melting it. I will need the washer tank in my car.
Did you get the matching exhaust?
I am enamored with your motor. I want the same setup, just with my 3.5 as a start. You have me convinced that I need those headers. I’m curious to know if they clear the washer tank without melting it. I will need the washer tank in my car.
Did you get the matching exhaust?
Long time no real updates, but there will be some progress soon!
Almost one year after finishing the complete engine rebuild, there was time to have it tuned and started for the first time!
I’m pleased to say that so far everything went perfectly and the engine is running great!
The tuner (Uli from Ital Auto) said the carbs are very sensitive but he has them dialed in now and sounding great! The engine has about 2 hours of running in time so far and will remain at these settings until its completed its run in time in the car. Final tuning will be done on the rolling road.
Super happy to see and hear it, and very pleased that everything went so well!
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Our motors are very similar with the piano top pistons and 300* Alpina cam. I am running the 45DCOES and just had to do the funky single trumpet/velocity stack as per the 1970 SPA car.
Keep us posted on the project. I am sure you will be very pleased
I think that might be the B2S spec, everywhere I read that B2 makes about 230hp. I’m really curious and a little anxious how much power it will make. Mentally preparing myself that it might have lost a few horses after 45 years.. I guess we’ll see!
I did buy the exhaust as a complete system, it’s made by classicexhaust.de in south of Germany. I had just the manifold ceramic coated which helped a lot with the heat but I guess we’ll see how the plastic tank survives.
Our motors are very similar with the piano top pistons and 300* Alpina cam. I am running the 45DCOES and just had to do the funky single trumpet/velocity stack as per the 1970 SPA car.
Keep us posted on the project. I am sure you will be very pleased
Sounds great, I’d love to see some pics!
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Belgiumbarry
Well-Known Member
230 HP seems possible... i don't believe 250 HP. My factory new ! 3.5l on triple webers was 210 HP... +10% with better cam and headers must be possible..... but + 20 % ????
A pic as requested James.
I also ceramic coated my headers (Jet-Hot) many years ago. Very pleased i did. My 50 year old wiper fluid container has fared well and heat in bay is definetely reduced.
The container's issues have not been heat, it has been where it mounts to fender well. I has developed a hair line fissure crack at mount point. It weeps to a certain point then stops. So it runs around a 1/3 full until I put some more goo/sealant on it.
(Sounds great, I’d love to see some pics!
I also ceramic coated my headers (Jet-Hot) many years ago. Very pleased i did. My 50 year old wiper fluid container has fared well and heat in bay is definetely reduced.
The container's issues have not been heat, it has been where it mounts to fender well. I has developed a hair line fissure crack at mount point. It weeps to a certain point then stops. So it runs around a 1/3 full until I put some more goo/sealant on it.
(Sounds great, I’d love to see some pics!
Ahh yes I read that also. I’m still trying to figure out how they got 250hp out of the B2S. I have a few articles but the HP isn’t listed. It makes me question the early 70’s calcs.
Thanks for bringing me back down to earth. I do have an article on the CSL tuner shootout. The red & blue alpina is running mechanical injection and ITB’s with the Alpina airbox as seen from @JamesE30. The stated HP is 250. This car was owned by Burchard B, godfather of Alpina. It seems unreasonable to think that the carbureted B2S was pulling 250 when his special edition was producing the same.
Other relevant info, numbers seem realistic but lower than the anecdotal stuff in the ether. Absent is the B2 3.0CS but it seems safe to presume that the HP output was the same as the 3.0S
For those that don’t speak German, the last column is race spec.
For those that don’t speak German, the last column is race spec.
Hahah, Tom Wanner ´s EX car, ask for history, its a shameSorry for all the text haha,
Here are a couple of pictures of Raab Motorsports beautiful e9 I test drove a couple weeks ago.
Sounds Superb and rides great thanks to the specially developed KW coilovers!
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They get 240HP from racing M10’s (120HP per liter). So I could see 250HP from a 1/2 race spec 3 liter (only 83hp per liter).
John
Good point, and more importantly I finally made sense of the french article below. The B2S is indeed documented as 250hp, by way of the 83hp per liter calc. Why they didn’t state overall HP anywhere in the article - I don’t know. I was translating as 83 per cylinder which had me totally confused.
HP Reference on the bottom of page 2. @JamesE30 I hope you don’t find this too noisy.
Belgiumbarry
Well-Known Member
Yes, we keep it at 6000 rpm..... they go to 7.200 rpm. That will give of course some extra horses..... race engine mods , but for how long ?
What a pain in the ass...
In December I bought a replacement steering column from a forum member in the states and unfortunately it never arrived and is still lost in transit.
2 weeks ago I got lucky and found another one in Germany. It was complete and in good condition with all the bits I needed so I bought it.. well it just arrived and disappointingly it was not packed well. The soft metal housing was packed right up against the hard metal pedal box and pressed into it like a tin can
Anyone had luck welding or soldering this pot metal? Hoping I can bend out the dents and repair it.
I wish people would take more care packing things, it’s such needless destruction. Feeling very annoyed!
In December I bought a replacement steering column from a forum member in the states and unfortunately it never arrived and is still lost in transit.
2 weeks ago I got lucky and found another one in Germany. It was complete and in good condition with all the bits I needed so I bought it.. well it just arrived and disappointingly it was not packed well. The soft metal housing was packed right up against the hard metal pedal box and pressed into it like a tin can
Anyone had luck welding or soldering this pot metal? Hoping I can bend out the dents and repair it.
I wish people would take more care packing things, it’s such needless destruction. Feeling very annoyed!
Oh Man! FWIW, I think it is cast aluminum. Should be able to tap it back into shape and TIG it. May be better off procuring another.
Hmm.. I have a feeling it’s not just aluminium, it seems so brittle..
My original one is cracked in several places (hence replacing it) maybe I will try TIGing that and see if it works..
Don’t really fancy buying another one. This is already the second replacement I’ve bought and it’s not easy (or cheap) to find telescopic columns in good condition