348 dyno results

That seems like a fairly normal power band. What kind of dyno does Braden have?

 

I'll just tell you what you can do.

1) High flow, metal core, 200 cell cats
2) Free flow muffler
3) Ported intake runners
4) Tapper ported throttle bodies

 

All good. Add:

5. remove MAF screens
6. replace air filter with free flow equivalent (not KN or anything else oiled)
7. make sure your injectors are clean (mine aren't so I want to see if this matters)

When you are looking at an exhaust replacement, try for something simple, single can with an "X" pipe design. In fact, just ask gothspeed to make you one complete with cats. It will literally bolt on.

However, if your car was put on a Dynajet, your results are not too far off of mine as modified. I went to 256 with my adds; this was 300 on a Dynapack. Remember that the absoulte numbers are essentially meaningless and you are looking at comparative differences. So, make sure that after your mods, you use the same dyno. Personally, given our experience, I'd make sure you started and ended with a Dynapack. It takes tire considerations out of the picture.

Also get your fuel/air readings. My initial reaction was that your rpm range is skewed low since your car should have a 7500 red line with a 7800 fuel cut off.

 

Keeping with what Vince said, on a Dynapack I made 305, and on a Dyno Dynamics I did 260 (259.9 actually). There is a place here that has a Dynojet and I wanna get in a pull on that one. So that is why I asked what kind of dyno Bradan has. That way it can be and apples to apples comparison.

 

Seems to be really good numbers for a Mustang brand dyno which I believe is what Bradan use, nice flat torque there. Understand the Mustang-type dynos read a solid 7% lower than dynojet dynos. So with a dynojet you're probably in the mid 260s which is about right for a challenge car. Gosh 348s really need more torque though!

 

Yeah - here's my 348 Dyno graph on Dan's Dyno:

http://ferrarichat.com/forum/showpost.php?p=141256992&postcount=363

Mine has test pipes & challenge exhaust. The Carbon Fiber Airbox was installed after the dyno and I doubt it has any effect on HP.

Thanks,
Erik

 

The challenge exhaust is #5.

 

I have #1 as well - off of a challenge track car - even with the straight pipes it's quieter than my Mondial with X-OST exhaust.

Erik

 

Was your car ever raced?

 

Which one? I know the car I bought my exhaust from was - it was parted out challenge car - my personal 348 - I don't know - it's a standard ts.

Erik

 

I see.

I thought maybe it had been raced because of the power yours made, but you where just commenting on the type of muffler you had on it.

 

The only difference between stock & mine is the straight pipes and the exhaust.

Thanks,
Erik

 

Let me see if I can hunt down the exact pipes I bought - to make it really interesting.

Thanks,
Erik

 

I know for a fact that lighter wheels and tires will yield more bhp at the wheels on a dyno. Flywheel Bhp itself won't change, just the amount lost going through the drivetrain to the tires will be reduced.

Stock 348 rims with average weight tires are usually somewhere around 52lbs. Reduce that just 7lbs each side and you will see a improvement of say around 7-8bhp. Figure .5bhp lost per additional pound of rotating mass on the axle ie. wheel/tire weight.

 

Removing emissions equipment is illegal but will give you the most power hands down on any car.

I think Eriks put down so much power because of the fresh valve job, cleaned injectors, and removed cats.

We have a Mustang MD-250 chassis Dyno.

 

AH HA!
Thanks for sharing the info, that was very nice of you.

Now it makes sence. I can totally believe those kind of power gains with a nice valve job. Especially if they did a nice job on the angles and a bit to shaping to the ports.

Where the stock valves reused?

 

Here is my Mondial T 3.4l dyno before/after (the light blue line) a tune by Competizione. The bottom lines (red, blue and brown) are with a free lowing exhaust only. In this configuration, the engine lost mid-range torque but gained power over 5700 rpm. The tune got all the torque back - and then some - and also increased a little bit the hp. The green and red lines in the middle are the original dyno prior to exhaust modifications and tune.

TQ went from 244.3 @ 5824 to 251.9 @ 4204.

Exhaust for that dyno: Stebro w/test pipe.

268 hp + 15% (power train losses) = ± 315 hp

Competizione then installed a pair of Hyper Flow. Power is now down to 263.4 hp, or ±310 hp if we remove the power train losses.
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How many days did they have it Wily?

 

I do not exactly remember. I travel abroad extensively, so when the T visits Competizione, it may be there for several weeks at a time.
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I see.