I have a 2003 525, How much can Dinan help?

[MB3]

Its a great car and fun to drive with the sports package, but its not a rocket ship. A friend of mine showed me the Dinan offerings but before I start modding this thing...

Has anyone done the engine/transmission computer upgrade on a 525, is it even worth it?

Thanks

[SilverStreak]

Bump and a move for more replies.

[Dnz]

Have you checked out dinan's website? Its got 'their' data on hp agins etc. DInan is expensive coz of the name.. Turner motorsports seems popular..?

[Brandon J]

Dinan's stuff will make the car a little peppier, but will not improve much overall. The engine shares most of its components with the 3.0L so efficiency for airflow in and out isn't a problem. You may want to look into ECIS intakes and Turner says they have the injector for the 2.5L engines coming out soon. Give them a call. The Dinan tranny software will be a good idea to match the higher rpm limit of the engine from a shark injector and for better gear selection from the computer.

[Atanasovski]

More 525i's? Sheesh! People have gone crazy with this car. :)

[Mblaster]

Just curious but why buy a new 03 525 that you want to mod when you could have bought a used 00 M5 for about the same price and have one heck of a car that needs next to nothing(unless you want to)?

[sirtiger]

yeah, I agree... It would make it pepier... you know...responsive... Not much faster.... for 2.L and a heavier car compared to the 3er u can't make it much faster w/o spending a fortune....

I am not sure what u r looking for exactly but Dinan will only make it more fun but not blazingly fast as you may expect...

[MB3]

I bought this car for my wife so that she and our baby would have a safe vehicle to drive around in. Before buying this car I did not know much about BMW's only that the 5 is supposed to be one of the greatest cars ever made.

Having said that, I am so unbelievably impressed with this car that yes, if I had a do over I would buy a 530 or possibly even a 540, although I am not disappointed with the 525 by any means.

I do not expect to turn it into a rocket ship, but will consider anything that will reasonably enhance the performance. I just wanted to know if anyone had put the engine/transmission enhancements on a 525 and if they could 'feel' a difference.

I definitely wanted a new vehicle though, and the M5 was a bit out of my price range.



Originally posted by Mblaster
Just curious but why buy a new 03 525 that you want to mod when you could have bought a used 00 M5 for about the same price and have one heck of a car that needs next to nothing(unless you want to)?

[sirtiger]

Do you have an auto? A 525 auto does feel a tad slugglish.... A manny would be ok.

Dinan Stage 1 and tranny software will make it more responsive... not more power... in your mind u will think it feels more power. If you start to do a CAI, exhaust, etc... yes, u will feel more power as u do more... on the downside, your car will be louder....