BMW M5 Forum and M6 Forums banner

1 - 8 of 8 Posts

·
Registered
Joined
·
8 Posts
Discussion Starter #1
BMW Car magazine (August 2000, pages 22-26) has an article on a 500 bhp E39 M5. Nowack tuners (Germany) modified the car by first adding to intake hoses and free-flow air filters. Second, they lowered the charge intake pressure by coating the underside of the pancake airbox in reflective material to drop the intake air temp. by 24 degrees (20 bhp gain). Third they added to pairs of race-style exhaust headers with long primaries, which meet collectors just before a pair of free flowing metal catalyst (would this pass emissions testing in U.S.?). They also constucted 80mm diameter outlet pipes. Lastly, the cylinder heads were ported, and valves and seats reprofiled. Performance jumped to 503 bhp at 7700rpm with 465lb of torque at 3400 rpm.

My question is why can't these modifications be done by U.S. tuners (ie. Dinan or Hennessey). Dinan's website states that they can't extract any more hp from the engine, and I believe Hennessey's mods. are only good for 25-50bhp more.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #4
Dinan's website, under software upgrades, states there is no more hp to extract from the engine. Given the Roundel statement this must be in regards to software mods only. A 600 bhp E39 would be awesome, and I hope it comes to pass
 

·
Moderator Emeritus
Joined
·
5,150 Posts
I think they're using a supercharger to get 600hp out of the E39 M5. Can't be done without a supercharger or turbo
 

·
Registered
Joined
·
2,009 Posts
200 HP sounds like about 7-8 pounds of boost...realistic...
 

·
Registered
Joined
·
8 Posts
Discussion Starter #7
The impressive thing about Nowacks M5 was that the 100 bhp increase was done without supercharging. The article stated the car was capable of 2oomph and did 0-60mph in 4.5 seconds.
 

·
Registered
Joined
·
3,144 Posts
There's a whole thing about the Nowack M5 if you read the journey Gustav took (form the main page of the website). 11 pages, and well worth the read. Full of cool pictures, etc.

--Dan
 
1 - 8 of 8 Posts
Top