355 Fiorano Handling Package Vs Challenge Suspension ECU.

Just received a response from Rob regarding damper product number changes for the standard 355. He said there were minor production changes, but zero performance differences. Effectively, dampers for standard and FHP-equipped 355's are all the same respective of front and rear damper differences.

 

@MAD828 Regarding challenge Bilstein dampers for $128 each.. just received a response from Eurospares. He says the price is correct and would be able to sell them to me at that price. However, they are no longer availabe.

 

Meanwhile... I just received a response from Superformance.

"Correct, all photographs on our website show the items we sell."

 

Just received a response from Eurospares. Fiorano front and rear springs are no longer available. That makes Superperformance’s reproduction the only alternative.

 

I don’t know the specs other than what’s been mentioned on the forums. Someone would need to measure the spring rates front and rear so we have a rough ball park where it should be.

I’m also sure I can find something from Hyperco as well as they seem to have a huge selection. I actually prefer Hypercos over most spring options out there.

 

Anyone ever put one on a spring rate tester to confirm?

What about fronts?

 

You think 512TR guys are willing to trade rear springs with us? .

Would a 99 F355 workshop manual show Fiorano front spring rates?

 

Measuring the Superformance spring only confirms the rate of the Superformance spring .

 

@601

Superformance says their front springs (linear) are 250 lbs/inch. Rear springs (progressive) are 220/300 lbs/in.

If Johan's spring test measurement of the OE standard front springs is correct at 175-180 lbs/inch, this would mean Superformance's Fiorano front spring is roughly 40% stiffer than standard. That puts it right around where the H&R springs, although H&R's are progressive.

 

On a side note, the Fiorano steering rack must also be paired with the Fiorano pump to get the full effect.

 

I'm building two 355's Barry . I've already purchased Rob's Sport Suspension for my Rosso 355. He's got his own 'secret' spring rate selection, which I won't be divulging w/ the dampers re-valved to those specs along with other custom features. His springs are also 2.5 inches wide, not 3 inches like OE, which is why he changes the spring seat.

For my Nero 355, I would like to upgrade it to FHP as accurately as possible. This will include using the standard dampers as is, accurate FHP spring rates/specs (unless I can find the actual ones), FHP damper ECU, FHP front/rear anti-roll bars, and FHP quick steering rack setup if possible. Basically, hoping to do an FHP on a 2.7 car.

 

^ wrong thread

 

@601
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These are old pics I found on a Japanese website. No longer available and spring rates unknown.

@MAD828 says the Superformance springs are about 11 inches front and rear.

https://www.ferrarichat.com/forum/threads/1995-f355-gts-restoration-and-major-service.493751/page-120

Unfortunately, I could not find side by side pics of the OE Fiorano front and rear springs.

 

@601 Judging by pics alone of the OE Fiorano fronts, they look pretty long. They seem right around the 12-12.5 inch of standard springs.

If standard springs are 175 lbs/in, my guess is 15% stiffer for the Fiorano, which puts it right around 200-205 lbs/in. I would assume they would spec the front under 220lbs (rear) for better ride quality under normal cruising speeds.


Someone needs to look into that 99 workshop manual .