SC kit for 308/328/Mondial

What do you do for an air filter? And, is the body inlet still utilized?

 

I just want to know how he plans on driving a Ferrari from Wisconsin to Idaho at this time of year! Good Luck!

 

I dynoed the QV today, several (5) runs all above 205 RWHP the best run was 208 RWHP!!! @ about 6500 rpm, Torque was 170+ @ 5500.
F/A a little lean (14) initialy, but moved to 13 @ the high end above 4000rpm.
This is from memory, I'll post the actual run graphs as soon as I get the data file and the viewing software set up..asap.

I was very (but pleasantly) suprised at the baseline numbers, do the math.

208 rw + 15%? drivetrain loss = 240 crank + 50% SC increase = 360 hp Baby!

-Luigi

 

Congrats - sound like good numbers! Looking forward to the graphs with A/F ratios!

 

17%-18% driveline loss is probably closer for a 308 , the drop gears eat power. So you are probably closer to 254 now. Is the car all stock now?

 

15% is about about right for a car with a trans that locks the input/output shafts so the only loss in the trans is friction from the oil/bearings and the diff losses. A 308 has drop gears and an output shaft drives through a gear set at all times as well, so it just isn't as efficient and can't hit the 15% number. There have been a couple threads on this subject and all the available data, although limited, were in the 17-18 range.

It doesn't matter anyway I guess, it's the measured rwhp number that matters.

 

The car is a stock Swiss spec (8.8:1 cr, swiss specific cams and gearing) with no additional mods AFAIK by previous owners. It has a late model Mercedes Lamda control and a few other mods to the stock CIS, and HUGE low restriction cats, no mufflers. This was done to pass California EPA by me (well, G&K Engineering and me) recently. It runs much stronger now than before the EPA mods were done, though I have no dyno data to compare, just seat time with the car.

-Lou
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Holy cow, that thing must be LOUD!

 

Wow.

 

Forget crank hp, & just use RWHP numbers which are measurable & meaningful as that's where the rubber meets the road.

Still, you'll love the extra 104 RWHP that +50% gives.

BTW, IMHO that dyno is optimistic compared to the Dyno-Dynamics numbers I posted earlier.

The torque numbers are pretty close: 160 vs 170, but 28 hp is a lot when the only significant difference seems to be the big cats.

While those cats probably flow better than my Euro QV's stock ANSA, at most I'd expect 10-15 hp from them, so the other 15 has to be differences between the dynos.

 

Actually it sounds like a stebro or x-haust at lower rpm, but up at the top end ,yes it roars pretty nice. Gets alot of decelleration crackle & pop, my neighbors just love it at 6:30 am on Supercar Sunday meet days,(not). Next Dyno session with the SC installed I'll video/audio tape and post to YouTube and or here.

Verell, Carl, How do you think the cats will react to the Supercharger boost ?
My concern is heat, right now I get about 700-750 degrees at the hottest spot (exit of rear cat) under high rpm/load with a infrared thermometer.? I plan to keep an eye on this as we dyno.

Still no Dyno data file, viewing software is all set up, I'm grumpy.

-Lou

 

Umm,
If the mixture is the same, rough SWAG is that with 50% more power, you'll be sending roughly 50% more unburned fuel do the cats. Not sure how that would translate to temperature rise ho.

Agree that you better keep an eye on it. Not only during the dyno run, but also the first few long drives w/boost. Dyno runs are short, so the cats probably won't reach max temp during them.

 

Might be forced to buy an X-ost or a Tubi, darn that would be sad (NOT).

 

Luigi,

Time to buy a Stebro or equivalent and lose the cats with temps like that. On the euro it's easy to swap them back on for biennial smog test.

 

Michael,
I think thats where I am headed, definatley if the SC kit becomes a heat gain problem. Or, I guess I could reinstall my superquiet 150 lb Swiss muffler !!!
-Luigi

 

Anybody hear from Thor? Is he home?


Dude!! Where are you!!

 

Finally got some info on the dynoruns. Attached is a jpg of the best run, unfortunatley the datafile I was emailed is corrupted or incomplete. I am waiting to hear back from the dyno facility on that. Heres what I have:
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That is one fine running 308! -- approx 250 hp and 210 ft-lbs of torque at the flywheel. Is that raw, DIN or SAE?

I have contemporary tests that state the Euro 3 liter qv specs as 240 hp DIN and 198 ft-lb of torque when new!

The solid (and expectedly lean) mixture control of the K-jetronic is what I have seen in almost every installation - hold at A/F of 14 and add a bit of richness up high for power and protection. Very impressive for what it is.

Great running engine!

 

Yes, but those are the numbers for the standard Euro engine with 9.2:1 CR. Lou's is a Swiss Euro w/8.8:1 CR!!!

The numbers I posted earlier were for 9.3:1 CR Euros, we're looking at ~28hp more from a lower CR engine! I know the Dyno Dynamics dyno is generally conservative, but that's a big difference...