SC kit for 308/328/Mondial

Hey guys,

The video is small and very compressed to get it to fchat upload size, so the audio is not great. Here is a link to some other video.

http://www.ferrarichat.com/forum/showthread.php?t=148912&page=3

Also, I posted a 12 minute video on youtube, should be up soon.

The SC has a pronounced hollow metal whistle, and the blow off between shifts is the "pissed off mountain lion". Right now the boost comes in at about 4000rpm, and I was trying to keep the rpms down to 5000 or so for safety. When it comes in, it comes in big, I can't wait to see what 6500 and up will be like. another small video below.

-Lou
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Full video from the So Cal 5-5-07 Ferrari show run, and another pretty nice accelleration clip, FYI.

http://www.youtube.com/watch?v=lNB3KdvT1r8

http://www.youtube.com/watch?v=FGLL_3s3IWU

 

I can hear the s/c whine now - especially in the first one. It seems less noticible at cruise I guess to ambient sound.

Very cool!

 

Great video Lou.

She sounded great! Looked like a great time.


But did you have to rub it in with that last quote "another beautiful Ferrari day in sunny Southern Kalifornia" (saying it like Aaarnold)


Cheers,
Chris

 

Hey Lou, I can't wait tosee the dyno results. Lee

 

Chris, maybe you and I need to get these superchargers. Maybe we can get a bulk discount? Your little 2Vi will be able to waste 348s!

And the Mondial will be able to keep up with minivans! (Just kidding....it's not THAT slow, but people seem to think it is around here.)

Birdman

 

Did you say bulk discount??!! If it was like $5k then yes, i would pull the trigger.

Yep, keeping up with John B and his 348 spider would be nice.

 

Nice videos, but I do have to add one thing... The supercharger on mine is just STARTING to pull at 5000 rpm (the number he was staying under in the videos). It really grabs your attention at 5500 and higher. Keeping up with a 348 shouldn't be a problem once he gets the A/F ratio checked and starts pushing it harder. You get the high-rpm Ferrari scream above 5000 rpm too!

I didn't hear the waste-gate open at all in the vidoes when he shifted, so I know he wasn't pushing it much.
Thor

 

Apologies for this newbie question (I didn't bother to read all the 11+ pages from the beginning), but why is the thread title "SC" (which I read as supercharger), when the add-on discussed here to me looks and behaves (boost starting at 5,000+) like a turbo?

I'm happy to rename it if that helps.

 

It is a centrifugal supercharger.

 

Turbos are exhaust drive, superchargers are belt driven. This centrifugal supercharger design is different than the traditional roots or screw style machines and is indeed more turbo-like, but it's still a supercharger.

 

Aha! Thank you sire, I learned something.

I remember Mike Eberhard explaining the advantages of his blower system, that - contrary to a turbo - it develops boost right from the lowest rpms. So I was puzzled to read here the characteristics of a turbo in a thread titled SC.

I guess the world is not just black and white, but various shades of gray.

 

Yes, you are correct Sir.

 

Carl is correct, hardly pushing it, REALLY looking forward to 6500+ rpm.

Carl- I took pictures (different angles etc.) of 308 US spec and 328 US spec engine compartments @ the Ferrari meet last weekend. Might help with working out the model to model differences (ie: AC compressor). I think it would be a big help if any here on this forum could post shots of 308, 328 US cars etc. with the RR wheel and inner wheelwell liner removed, if possible.

-Lou

 

Damn, If you guys do that, I'll have to move phase 2 up a year to ensure you'll eat my dust instead of vice versa...

Umm,This could get expensive fast, I better peddle a lot of paperweights!!
;^)

 

What will be very interesting is the dyno data. Comparing the two incredibly well done FChat supercharger installations on comparable dyno-jets at comparable boosts will be really technically interesting.

Hopefully, my simple little old fashioned carb car can keep up and not look too bad...

 

Sheesh, the thing doesn't do anything until 5000 RPM? Seems like it ought to provide some thrust lower than that. That doesn't give you a lot of room to keep it in the boost between 5000 and 7000 RPM.

 

I'll get some shots when i start my rear shock/spring install. (i hope soon)


Pizzaman

 

I have to agree and hope that isn't the case. I take my 308 beyond 5,000 only on the track, but it is "regular traffic" where I'd like to get a bit of umpf to get off the traffic light against the souped up Hondas etc.

 

Well boys,

Dynoed the 308 with mixed results, after futzing with the CIS mixture, got the air fuel into GREAT shape. Problems with ignition...the spark is being blown out like birthday candles on an eight year olds cake @ about 6000 rpm under dyno load. Probably my fault, should have looked into the plugs and gap, but the car just had a 30,000 mile service. The 308 currently has an out of spec ngk plug (hotter, big gap design) with a .030 gap, clearly not working out. We could not get the correct plugs while on the dyno, unfortunatley. Purchased Ferrari spec Champion N6GY and will gap to .024, Dyno again on wed of next week. The car is making 240 rw @ 5800 rpm! look at the hp graph, its like a 45 degree straight line! Air fuel is kind of wierd, but good. Gets a little lean in mid rpm, but then fuels up nicely in the higher range. We will see with the new plugs, what happens near the redline. Meanwhile, I gassed up with 100 octane racing gas just to be safe, then got on it hard to about 6500 rpm 1st,2nd & 3rd. Un real.......I'm gonna need to do the clutch.

Also attached is a little dyno video.
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Birdman,

It comes in strong at about 4000-4200, throttle response is vastly improved over stock right off idle. It's a different car now across the whole rpm range. See dyno graph above.

-Lou

 

Very nice results!
Do you have that dyno graph with rpm on the x-axis?

Congrats on a terrific installation!

 

We have had some issues in paste dyno runs with the inductive tach pickup getting some high frequency interferance from my car somehow ?!?, and causing the dynojet a/f module to freak out and go offline suddenly (not a good thing). So we run a few to establish a/f, and then hook up the tach for a clean run. Long story short, no rpm this run. Wednesdays run I will be sure we have all the data. I could email my runfiles, PM me.

 

Well, assuming you did this dyno like me (4th gear, the standard) and our gearing is close, here are the approximate rpms and horsepowers based on our overlaid power curves based on mph. Lou and my numbers were very much the same, and even more match almost exactly the numbers taken from Carl's 928 website on the prototype Mondial 8 (the prototype "green line" graph with the other installation and the Weber'd 3.2 is here: http://ferrarichat.com/forum/showpost.php?p=136716618&postcount=61

Since the other s/c dyno was probably done in 3rd gear, you cannot really exactly compare the outputs of the two. It's my bet that both in the end are quite similar, as you would expect.

And that due to the constrictive nature of the K-jetronic, it even chokes off the superchargers a bit - - the antique but elegant Webers actually do darn fine in comparison. Yea team.

Hopefully this will help in the analysis.
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