F355 GTB convert to Challenge version

Every car has it’s wing. Challenge wing or bust.


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The Ferrari F355 was produced with two different engine management systems: the Motronic 2.7 and the Motronic 5.2. Each system has its own set of advantages and disadvantages. Below is a comprehensive comparison:



1. Engine Management System:

• Motronic 2.7:

• Utilizes two ECUs (one for each bank of cylinders), allowing for independent control.

• Features dual Mass Air Flow (MAF) sensors and dual throttle bodies, providing more precise air intake measurement.

• Operates on the OBD-I protocol, which is less stringent in terms of emissions diagnostics.

• Motronic 5.2:

• Employs a single ECU managing all eight cylinders, simplifying the system.

• Equipped with a single MAF sensor and single throttle body, streamlining the air intake process.

• Complies with the OBD-II standard, offering more comprehensive diagnostics and meeting stricter emissions regulations.



2. Performance:

• Motronic 2.7:

• Some enthusiasts believe it offers a more responsive throttle and slightly higher power output, though concrete evidence is limited.

• The dual-system setup can potentially allow for finer tuning.

• Motronic 5.2:

• Provides a smoother power delivery and more consistent idle, enhancing drivability.

• The single ECU system is generally more reliable due to fewer components.



3. Diagnostics and Maintenance:

• Motronic 2.7:

• Being OBD-I, it has simpler diagnostics but offers less detailed information.

• Easier for DIY enthusiasts to work on due to its straightforward nature.

• Motronic 5.2:

• OBD-II compliance means more detailed diagnostic data, aiding in troubleshooting.

• Requires specialized equipment to read codes, which might necessitate professional assistance.



4. Emissions Compliance:

• Motronic 2.7:

• Designed before stricter emissions standards; may not meet newer regulations without modifications.

• Motronic 5.2:

• Built to comply with stricter emissions standards, making it more suitable for regions with rigorous testing.



5. Availability and Market Considerations:

• Motronic 2.7:

• Found in 1995 models, which are now older and may have higher mileage.

• Some collectors prefer this version for its dual-system setup and perceived performance benefits.

• Motronic 5.2:

• Present in 1996 and later models, which might have updated features and potentially lower mileage.

• Generally considered more user-friendly due to improved diagnostics and emissions compliance.



Conclusion:


Choosing between the Motronic 2.7 and 5.2 systems depends on individual preferences and priorities. If you value ease of maintenance and potential for fine-tuning, the 2.7 system might be more appealing. Conversely, if you prioritize reliability, smoother drivability, and emissions compliance, the 5.2 system could be the better choice.

 

1996 Swiss cars were Motronic 2.7

Switzerland didn't mandate Motronic 5.2 until 1997. This is why some F355 Challenge cars are from Switzerland.

 

Speaking of challenge parts, more unobtanium challenge parts for sale .

https://www.ferrarichat.com/forum/threads/ferrari-f355-challenge-rear-bumper-discontinued-rare.700170/

 

I’m the French guy for challenge rims
Thanks Ken

 

I’m looking to buy a challenge, but I’d like a 348ch

 

They're pretty scarce now and many remaining cars have gone into collections. I know of one near me whose owner tracks his regularly at Lime Rock Park...


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@SoCal1 probably has one for sale .

 

Rims, door sills, front lip, headers, cat cancel, Tubi Exhaust

Done!!!

 

Just make sure headers etc are for 5.2 . Which Tubi muffler are you going with?

 

I agreed with owner non-ebay deal
https://www.ebay.com/itm/267071990140

 

Headers just decide about Fabspeed, didnt order yet. but related add for 2.7. yeah. Headers need for 5.2

 

You’d want to stick with 4-2-1 design manifolds.


Your current choices are:

1. rebuild stock headers to better quality
2. Tubi headers
3. Larini headers

 

Either that image is an optical illusion or that Tubi is very dented up. Plus… you don’t want this muffler. You will surely be disappointed with sound.

 

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“Ferrari F355 Tubi Style Exhaust

Fit both on Berlinetta, GTS and Spider models.

Very good condition, no damage.

Great exhaust, not only looks beautiful but also highlights the sound of the engine even more.”



$10 those are huge dents.

 

you are rigth. i watched almost many videos on youtube between tubi and akropovic.
Akropovic sounds really scraming skinny voice and more horny.
Absolutly i would like to go for Akropovic one.

 

Take your time on exhaust choices. You just bought the car .


I recommend ITO Racing from Japan.

 

how you guys think about these:
https://www.wgmotorworks.co.uk/product/nitron-r1-coilovers-for-ferrari-f355-94-99/

 

Lookin for used ITO Racing Exhaust for 355. in EU , if possible.

 

I have a set coming for my 348. I added their nose lift system to mine.

 

Does anyone have the cowl going over the back end for the transmission for improved cooling ? Been looking for that part for years

 

I've seen them on eBay multiple times, most recently a couple of months ago. I fail to see the point, though, unless you abuse the clutch or plan to do standing race starts...

 

Just to complete the car.