Today we added a Super AFC and a mechanical boost controller to our Evo. (Previous mods: Buschur Racing intake and turbo-back catless exhaust.)



The chart above compares the stock (no mods) dyno curve with the final, all-mods run. Compared to just intake and exhaust, we picked up 30 horsepower at the wheels with the S-AFC. The boost controller gave another five or so, and smoothed out the boost curve (the factory solenoid has that funny boost drop at 4500 rpm).

Not bad for a little bit of work and a few bolt-on parts! I love this car.

You can see more of my dyno charts here.

--Dan
Mach V Motorsports
MachEVO.com

 

Nice Dan, I dyno'd right after you and was able to pull 289/271 out of it. Not bad for the humidity we had yesterday.

 

Stinkapuss

Wow nice numbers! what mods do you have on to get those numbers??

 

I have a mbc set at 1.4 bar, safc2 (tuned), Ultimates 3" t-back exhaust with testpipe, grounding cables and a k&n drop in panel filter with no lid.

 

Sheesh! Maybe I am going to have to put those grounding cables on after all!

Good job.

--Dan
Mach V
MachEVO.com

 

Dan, why the huge dips around 5500K???

 

Hardly any cars pull straight up to redline. If you look at just about any dyno chart they'll have similar dropoffs past peak (duh) hp/tq. Just because the engine's working harder does not mean it's making more power.

 

Look carefully at the chart. There's not a "dip" at 5500; there's a fall-off in torque. (The dark blue line is torque; the light blue is hp). The torque peak (factory-rated, anyway) is at 3500. The car doesn't maintain that torque all the way to redline.

In the case of this graph, the torque is falling, but not as fast as RPM's are increasing, to hp keeps going up as revs rise.

(If you didn't know, hp is just a number that derives from torque and RPM. The exact formula for hp is torque (in ft-lbs) * rpm/5252.)

--Dan
Mach V
MachEVO.com

 

Isn't that where the timing is getting pulled because of knock? The car stock has too much advance above 5k. That is the reason people are going with the e-manage or Vishnu set-ups (you can have control over the timing). The control of the timing is also showing great drivability gains off-boost and with helping turbo spool and therefore low RPM boost and torque. All as importaint as the gains you get pulling timing above 5k. Some form of timing control is key

 

Nice numbers.

These cars are sweet when you can spend under $1500 and gain 55 HP at the wheel

 

I don't know about that. If that's the case, are you asserting that the factory torque falls off in the same way because of knock? Every car has a natural torque curve, as mentioned above. You're not going to find one that has level torque out to redline.

(Factory torque curve is dark red above, modded car torque is dark blue.)

Honestly, I wouldn't over-analyze a single dyno graph. Undulations in torque delivery are normal, and won't be exactly the same from one dyno run to the next. What I look at is the overall shape of the curve, and the area underneath.

--Dan
Mach V

 

Thats a standard 2wd dyno right?? Just disconnecting the drive shaft??

 

It's an AWD Dynojet.

--Dan
Mach V
MachEVO.com

 

I understand and agree with all that...however Shiv and alfriedesq have both shown several dyno graphs (before and after timing adjustments) that have significantly smoother plots AND make more power everywhere due to adding timing down low and removing it up top (I am oversimplifying what they did a little). Timing adjustment is a big deal with this car.

Having said that the gains are still quite good with the SAFC, it's the area under the curve that the timing adjustment really helps. Do some searching, the info is out there

 

I'm not sure how we got talking about these other people on this thread. I simply wanted to share some dyno results. I thought the car made great power with some very simple upgrades; I'm excited about that.

I'm not asking how to get more or better results; we have plenty more ugprades in store for our car. Some of them may involve timing changes, but probably not for a while.

--Dan
Mach V
MachEVO.com