supercharging a mondial 8

Mark (mk e) is your man. He has a blown 308 that is making 500+ hp.

Also since you are in So.Cali, you may want to give Carl a call at Blackhorse Motors. Very nice guy, and he has already blown a Mondial. The number is (310) 815-1957.
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Blackhorse Motors in Los Angeles is currently ( or just finished) supercharging a Mondial. However, they replaced the CIS with EFI.

 

keep us upto date m8 as i think a few people would be intrested in the conversion

 

To me Mark Eberharts set up is the one I would like to do, with intercoolers.. Very clean with good numbers, currently over 500 HP.
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I looked at vortec when I first started thinking about supercharging mine too…..what I found is that a centrifugal unit gives you all the worst features of turbocharging and supercharging. You will be much happier with a positive displacement type, roots of screw. I had an eaton MP90 on my car for a couple years and it worked quite well. The MP90 has a built in bypass valve (you need a bypass valve with a positive displacement blower) which is nice, but you can get an M90 (that doesn’t) on ebay for a couple hundred bucks.

If you insist on a centrifugal, Paxton would be my choice. They have a gearless planetary that helps flatten the boost curve a bit.

CIS is a real pain to deal with from a tuning stand point and in very flow limited, you really should think about EFI. On a QV at least, just switching to EFI or carbs adds 25hp, add a set of early carb cams and you’ll be at 240 without a blower.

 

I have QV with the K-jet without the electronics (UK version). The car was built by Koenig and is turbocharged. To supply the additional fuelling required, they used a vacuum-enhanced Warm Up Regulator and an adjustable Fuel Pressure regulator on the fuel return line. It provided the necessary fuel increase but fuel consumption wasn't great.

With so much modern stuff available these days, it really would be less hassle to go digital with EFI and Ignition. If you have a friendly mechanic and machine shop facilities, it shouldn't be too difficult.

 

A porsche freind of mine has a turbo with CIS too, so it can be done....just a lot of screwing around putting the engine at risk getting it right. EFI is just SOOO nice.

Again, IMO the paxton is probably your best bet in centrifugal.

 

What Fcar is that? Oh baby that would look good in my 308

 

It's an '84 QV

 

Great thread - while the supercharger would easily net you 300 hp plus, with your car the entire earlier Ferrari 308 carb system would bolt up for about $3k and you would be at about 240 hp as Mark said; It would feel like a lot more as the Webers have a much better throttle response than the K-jet. Add another $1200 for cams and you are over 260 - 270 depending on where you want the power band. So you would have 0-60 times in the high 6/low 7 second range much like a 3.2. At least to me, the Webers are easier to DIY maintain and more reliable. And you wouldn't be futzing with development numbers on the tuning as this has all been done before.
This is similar to what I did (I replaced my Kjet Mondial with Webers, picked up close to 30+ hp total, and most in the low end bringing up torque #s and weighs less). The sound is glorious through the eight organ pipes - the previous K-jet sounded like old plumbing. The car now jumps when you hit the throttle as the Weber accel pump jets fire and all eight butterflies open up. It's such an Italian driving experience.
As to the CARB #, if they are similar to the late model carb'd 308s, then you simply use that year 308 jetting -cheap, available and easy to switch back to a power set - takes about 30 minutes soup to nuts.
The S/C is the way to go for big hp numbers though, and it has been done several times before. Would also suggest calling FChat sponsor Norwoods for some of their force-fed induction experience - I know they have done at least one Mondial.
Let us know how it goes, good luck and have fun!
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He's got an injected 2v, carbs or EFI alone should put him at about 205-210. Early carb cams would bring it to 240ish, P6s for the 260 range. The EFI would pass smog no problem, I'm not sure about any of the other options. I guess it would depend on how high an rpm you can get them to do the test, the higher the better.

 

Do I understand this right? Carbs from earlier models bolted onto a Mondial 8 2v would get you about 35 HP, for 3k?

 

I have to say, I have been inspired, encouraged and assisted by many on this site, with warmth, helpfulness and sometimes plain curiousity.

I am in the midst of installing a Coil-on-Plug (COP or coil stick) type ignition with probably a DIS-4 box to replace my original Magnetti Marelli system.

Also getting some kind of system to convert my K-Jet into EFI. The biggest work is the fuel rail because of the throttle body position and (in my case, the intercooler positioning). All othe bits are easy to do or fabricate. I am using mainly BMW or MB EFI bits to make replacement and product reliability better (I hope).

With so much new digital stuff available these days, the costs have dropped tremendously, I am for-going OBD sensors but will tune and burn in maps direct onto the microprocessor chip.

Hope the engine won't blow up! After more than 10 years of ownership, I am getting tired of searching for K-Jet parts and a smelly exhaust.

 

The other option is to sell the 8 and get a 3.2 instead...

 

probably at least 20+ is what my numbers suggest - MUCH more with cams

 

Would agree that the 3.2 is a terrific bargain right now. While biased, I feel it is the best of the Mondials

 

I think that's true for a QV or 3.2, but I think it should be less for a 2V. A late carb engine is 205, injected 195...so I'd expect 205 I think, 240 with the early carb cams, 260 with p6 cams.

 

I believe at least 20, as the flow improves so dramatically and you could richen the mixture a bit over the near stoich K-jet emissions tuning. Should also use an opened up airbox with a K&N of course And then there's that trick of retarding the intake cam...
I do agree that with P-6s you will have 260+. Too bad we never got Philip to dyno his P-6 car...

 

Mark,

Do you have the pattern or whatever to make another plenum for people?

Also SNJ watch out for CARB#'s. The EO number is for the unit as applied to specifc cars if I am not mistaken.. There is no supercharger with an EO# for a Ferrari. You better check!

 

I'm not biased, I agree. I do prefer the lines of the 8 and the QV better, but the bugs were worked out of the 3.2 and it does have enough power. The 8 just makes you drive it harder (which isn't a bad thing).