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  BMW Forums » BMW discussion forums » General BMW
  Hamann Engine Upgrade

 Hamann Engine Upgrade



I own a 2004 645 convertible. Nice car... I love it. However, it is a convertible, so the pickup is sluggish. I took it to a tuner in NH, and he was surprised how sluggish it was, said it felt like an Audi A4. Anyways...

I want to get the engine upgraded by Hamann. The tuner increases the displacement from 4.4 to 5.2. Giving it more HP and torque (to 412hp, 550Nm). My questions are... I have many. (Feel free to answer even if you don't have a 645, but got your engine stroked... just wanna get a feel for this.)

1., has anyone done this here on this forum?
2. How much did it cost? How long did it take to upgrade your engine?
3. Where did you take your car to get it upgraded?
4. What's the minimum octane rating for fuel you can use after upgrade?
5. Also, can you get your engine supercharged (in my case) / turboed too?
6. How reliable was your engine after the upgrade?
7. Did the stroke engine upgrade also come with a high flow throttle body?
(Dinan sells these, give 8+hp, and 8+ torque for $600, hardly seems worth it, but I want to deck out my car.

What are my other options for engine upgrade other than Hamann? To me, I'd rather have more torque than more HP, since I like windy tracks, rural windy roads, and I spend more time on the streets than on the track.. so I won't be going over 120MPH much. (Incidently 120+MPH with the top down is quite scary!)

My other option is to go with Hartge. I gave them a call, and they told me I had to ship my car to Germany for the engine upgrade. I don't really want to do that. I called Hamann, and they told me that ideally, I'd have to ship my car to somewhere in California, but they were willing to work with a local tuner. (I live in New England.)

Now, I've been looking at Racing Dynamics, they have a 5.0L V8 R50 motor with 480HP, but they don't list torque. Does anyone have that number? Also, it's not clear whether they can upgrade my existing engine, or whether the R50 motor is something RD builds and I can buy separately. Anyone know?

So, if not Hamann to stroke my engine, who else? Or should I not stroke my engine at all? Questions, questions.....

thanks in advance.
   Reply » Hamann Engine Upgrade

All i know is that the conversion costs 35000 Euro's (around 42-44k USD) and you must leave Hamann your car for around 1 month or so. Definately not worth it for the 70-80hp it gives out.

   Reply » Hamann Engine Upgrade

Any engine upgrade with displacement increase will cost you a small fortune. Period.

The other alternative, which is a lot cheaper to do, is to go with a supercharger kit.

I don't know who is manufacturing kits for the 4.4 Liter V8, but one of the most known manufacturers is ASA Germany / Infinitas.

In cooperation with Alpina, they have developed a patented supercharger (which is quite different than a standard supercharger though, since it's a combination of the intake half of a turbo, but driven by a planetary gearset - hence the name Nautilus supercharger) and planted it in the Alpina B5. By using the N62B44 block they are peaking 500hp officially (Alpina's own dyno tests showed 530-550hp, but that's another story)

Anyway, to make it short, a supercharger will give you what you need and it will be cheaper and easier.

   Reply » Hamann Engine Upgrade

And forgot to add.

The M6 Cabriolet will be out soon, you can trade your car in for one.

   Reply » Hamann Engine Upgrade

I have searched everywhere for a SC kit for the 645 with no luck. Only guys that i found are vf-engineering (US guys) but they don't have any info on their website and won't reply to emails. Some guy on this forums has a 645 witch is SC'ed by them but he didn't reply to my PM. They claim it will cost around 8000$ if it's ever released that is.

   Reply » Hamann Engine Upgrade

Quote:
Any engine upgrade with displacement increase will cost you a small fortune. Period.

The other alternative, which is a lot cheaper to do, is to go with a supercharger kit.

I don't know who is manufacturing kits for the 4.4 Liter V8, but one of the most known manufacturers is ASA Germany / Infinitas.

In cooperation with Alpina, they have developed a patented supercharger (which is quite different than a standard supercharger though, since it's a combination of the intake half of a turbo, but driven by a planetary gearset - hence the name Nautilus supercharger) and planted it in the Alpina B5. By using the N62B44 block they are peaking 500hp officially (Alpina's own dyno tests showed 530-550hp, but that's another story)

Anyway, to make it short, a supercharger will give you what you need and it will be cheaper and easier.

Alex... thanks for the information. Can you give me a link with all this information? If you can get me an English language link, that would be great. But, if you have only a German language link, I guess I can brush up on my German. It's been years......


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