Intake Plenum: 456 vs 550/575 vs 599 vs F12

The F133 engine family (550-612 OTO) was Ferrari's first V12 series with dual length intake tract, which upped hp considerably above about 6000 rpm. Took up some space doing it. If you look at cam timing, the 456 and 456M actually have wilder timing, but run out of air at a lower rpm.

On the later V12s from the F140 family, Ferrari incorporated variable valve timing on the intake and exhaust cams, which effectively increased duration, and still incorporated dual length runners into the system without needing so much space to do it. The F12's Type F140F engine added resonance chambers on the ends of the intake tract for a little free overpressure. The F12 tdf removed them and used basic hot rod techniques, mechanical lifters and a higher rev limit to raise hp again.

In the future, expect infinitely varying intake lengths to optimize over the entire rev range, similar to what VVT systems do now for cam timing.

 

Thanks Taz Interesting insight

 

Terry, here's one way (and BTW, this used to be a stock 456 intake manifold)
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John- Yup, that should do it.

 

You oughta see her on a road course or a quarter mile
This little modified ponton has got plenty of style
She beats the gassers and the rail jobs, really drives 'em wild
C'mon and turn it on, wind it up, blow it out 550

 

Barry- Yup, pronounced five, five, oh.

 

Gonna save all my money and buy a 550
Get a helmet and a roll bar and I'll be ready to go
Take it out to Pomona and let 'em know, yeah yeah
That I'm the coolest thing around, little buddy gonna shut you down
When I turn it on, wind it up, blow it out 550




John will have a 369

 

Has this intake been installed on a 456 yet? Any footage of it running?

 

360, it's actually going on my 550's engine, which, as Barry suggests below is being punched out to around 366 in3 (5.99 liters), but isn't running yet.

Barry you're a credit to Ronnie & The Daytonas!

Now you've got me thinking about badging it as a GTO ........

 

Just a little deuce coupe with a flat head mill
But she'll walk a Thunderbird like she's standin' still
She's ported and relieved and she's stroked and bored
She'll do two hundred and twenty in the top end floored
She's my little deuce coupe
You don't know what I got

 

Will there be any kind of air filtration system? It is gorgeous, but I'd be paranoid about grit getting aspirated into the system.

 

She purrs like a kitten till the Lake Pipes roar.

 

Allan, I'm planning a set of SS screens on the trumpets for this setup, only for the initial breakin runs on the engine dyno, as the dyno room is pretty clean. After that, these 'Busa TB's will be changed out for a proper Jenvey setup, and if I decide to leave the ITB's open with individual intakes, I'll use individual foam Unifilters or K&N's on them.

If my preferred engine air flow strategy (MAP+TPS) doesn't work out, then I'll enclose each bank of trumpets in a common air box with a long oval filter, a single inlet and a MAF sensor.