F355 dyno

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Discussion

Mario149

Original Poster:

7,774 posts

185 months

Wednesday 1st October 2014
quotequote all
Anyone here ever dyno-ed a 355? If so what did it come out as?

I love 355s but have always been of the opinion they feel more like a 320-340bhp car rather than 380. It doesn't matter really as they're plenty quick enough to enjoy on the road, but I am just curious for some real numbers.

Also interested in 360 dyno numbers if anyone has.

My 550 is going on SRR's dyno in a few weeks when I have time - took my '94 NVR 993 there last Sat and she was virtually bang on the 268 bhp she was supposed to leave the factory with smile

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

MDahmen

7,172 posts

184 months

Wednesday 1st October 2014
quotequote all
I have seen some before and after dyno graphs online, but can't remember where.

I agree, my 355 did not feel that fast. On the other hand it hit fairly high speed on the Autobahn (300+ on the speedo, can't remember the TomTom figures, but the difference to speedo was not all that big from memory - maybe 10ish kp/h), so plenty of power to punch through the air at high speeds

phib

4,488 posts

266 months

Wednesday 1st October 2014
quotequote all
Mine is one of the slow ones, it only managed 178 mph on the gps.

The 550 however managed just over that before I bottled out !!

Phib

Mario149

Original Poster:

7,774 posts

185 months

Wednesday 1st October 2014
quotequote all
Top speed for a car is give or take a bit proportional to the the cube root of its power i.e. to double the top speed you need 8 times the power. So if your car is supposed to do 183 mph and only does 178mph in test conditions, you could be down about 8.5% on power (= [1 - (183/178)^3]x100) or about 32bhp. Or you could have been going up a slight hill or into a headwind and have the full complement of ponies.

I guess what I'm saying is that top speed achieved is necessarily a good indicator of engine output!

I tried to vmax my 993 Cab in Germany a month or so ago and bottled it at about 135. Apparently they'll do 160mph+, but that's purely academic: I don't want to be anywhere near a 993 going that speed, let alone in one judging by how unstable it felt!.....although admittedly the aero was never going to be great given the canvas roof.

ETA: we had the 550 at a comfortable 170mph on Germany last summer, felt absolutely rock solid, a real credit to the car and its GT credentials....god knows what speed you can peddle something like a 599/F12 at before it feels a little dicey hehe


Edited by Mario149 on Wednesday 1st October 22:17

Pentoman

4,818 posts

270 months

Wednesday 1st October 2014
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Ages ago I attended a dyno day and a colleagues 348tb (decat, tubi) made 315bhp which was a surprise to those of us thinking they made less.

http://www.vr6oc.com/events/RR/powerstation/251106...

phib

4,488 posts

266 months

Thursday 2nd October 2014
quotequote all
[quote=phib]Mine is one of the slow ones, it only managed 178 mph on the gps.

The 550 however managed just over that before I bottled out !!

Phib [/quote

Actually I ran out of road and talent !!

Phib

Berlinetta

562 posts

182 months

Thursday 2nd October 2014
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575M made 507hp... Bit lowor on power than hoped, with tubis...

Vixpy1

42,674 posts

271 months

Thursday 2nd October 2014
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Most of the 355's i've done have been around 350bhp.