451 smart fortwo

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What do you feel is the best performance modification that you have done on your smart?

Please share your input with the community for the benefit of others that may be looking for a way to upgrade the performance of their smart.

Please post those comments in this thread so we can keep it organized and easy to reference.

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Hello  it's  possible to remap the ecu since years   i have post about that years ago but not found my login  back ...

I can now also remap the Gearbox from 451 cars ;)

451 gearbox ecu

451 gearbox Map

http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/419105_3331566977215...

Welcome back Theo!

Would you mind sharing the process of what is involved and what someone would gain by doing this?

i did the mod of gear box on the 600   and 700 Cc in the past

the clutch actuator is more quick

and also the actuator of the gear selector

the  waiting times between gears are also reduced

if you test a car 451 turbo  and then a 451 brabus the brabus is quicker 

but now i can read and write to smart 451 gearbox ecu's  i can also make  61  71 84    98  102  112  gearboxes quicker ;)

should post some pics

I increase overall power and performance with 3 minor modifications. One: I installed a carbon fiber scoop on the side intake to increase the flow of air to the engine , Two: I replaced the stock air filter to a K&N filter for increased air flow, Thirdly: I installed a Hyper Pipe from the intake to the intake manifold for a total upgrade in performance and handling. Great investment for my Smart and love the fuel mileage increase!

yes we installed  on some cars  forge pipe  and  that give also a big increase  it  remove the restrictors    in combination with the  engine remap and the transmission remap it's very great

How much of a increase, and do you use the high octane gas

have you used the gas with no ethanol ?

 thanks 
Nancy

Reinaldo Emeric said:

I increase overall power and performance with 3 minor modifications. One: I installed a carbon fiber scoop on the side intake to increase the flow of air to the engine , Two: I replaced the stock air filter to a K&N filter for increased air flow, Thirdly: I installed a Hyper Pipe from the intake to the intake manifold for a total upgrade in performance and handling. Great investment for my Smart and love the fuel mileage increase!

I only use Premium Gas at a 92-93, I got average 5 MPG increase out of it according to my scan gage. Unfortunately all gas has a min 10% ethanol mix, i have run Flex Fuel once an my smart, ran like a rocket which i would not advise to try. Not only did I run hot and increased my MPG by 3 additional MPG, it cause my idiot light to turn on notifying me according to the scan gage code pulled, that my engine lean burn at idle was too rich. I got the light to turn off by itself by running 2 tanks premium back to 92/93 of which the Flex Fuel rated at 97. Might as well call Flex Fuel Rocket Fuel! :) I don't advise running Flex Fuel in a Smart. Thanks for the comment.

To use ethanol the ecu need to been remap for  cold start and bigger ammount of injection and the timing .... otherwise yes you should get misfiring and lambda is not the same for ethanol as for gas

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