Has anyone compared the dyno numbers from the Cobb AP to actual dyno numbers? Just curious as to how close they are..

good question.....i used that feature once when i was stock and it was way off

What did your car put out on the AP Dyno when you were stock?

It is known what stock Evo Xs put out on other dynos, so we can compare numbers.

I'm about to do couple pulls and compare with the AP. $50 for 3 pulls.

I will be doing some pulls on the 12th, and will see where I am in comparison. Currently AP says 345ish whp which seems high for the minor mods I have.

I received some videos of a guy with an EVO X that has absolutely NO parts (100% stock GSR) and his only mod was Cobb AP and 93 octane stage 1 map. He video'd 3rd gear pulls from 2k rpms to redline for stock and then for the reflash only 5 minutes later. I used a stopwatch, measured 5 times each from the moment the needle hit 3k rpms to 7k to be fair because it was tough to get exactly when he hit the gas.

Averaging my measurements of his video, I came up with 6.5 seconds in 3rd gear from 3k to 7k rpms stock and 5.4 seconds after the tune. I was VERY impressed to say the least. Looks like the car is just faster all around with an AP tune on a stock car - seems like mitsu designed the car to run that good and dumbed it down to stay at 295 HP. Look at stock dynos and you will see that as well.

Thought this might help.

I'd love to see someone 1/4 mile it stock and after tune in the same night. Maybe 2-3 runs each way. I think a lot of people would be interested in leaving the car stock and quiet to drive, yet gain a nice chunk of acceleration and drivavility.

Patrick

The AP is probably giving an estimated HP figure "at the crank" instead of "at the wheels"... Since most horsepower figures stated by manufacturers are at the crank... maybe. That could account for the AP being "Way off". But then... what do I know.

I received some videos of a guy with an EVO X that has absolutely NO parts (100% stock GSR) and his only mod was Cobb AP and 93 octane stage 1 map. He video'd 3rd gear pulls from 2k rpms to redline for stock and then for the reflash only 5 minutes later. I used a stopwatch, measured 5 times each from the moment the needle hit 3k rpms to 7k to be fair because it was tough to get exactly when he hit the gas.

Averaging my measurements of his video, I came up with 6.5 seconds in 3rd gear from 3k to 7k rpms stock and 5.4 seconds after the tune. I was VERY impressed to say the least. Looks like the car is just faster all around with an AP tune on a stock car - seems like mitsu designed the car to run that good and dumbed it down to stay at 295 HP. Look at stock dynos and you will see that as well.

Thought this might help.

I'd love to see someone 1/4 mile it stock and after tune in the same night. Maybe 2-3 runs each way. I think a lot of people would be interested in leaving the car stock and quiet to drive, yet gain a nice chunk of acceleration and drivavility.

Patrick

If what you say is correct it allows them to...

Stay super safe with the AFR to account for people bolting on parts (Intakes) and not getting tuned.
Allows them to "Up the power on next year's model" by making minor tuning changes.

The AP is probably giving an estimated HP figure "at the crank" instead of "at the wheels"... Since most horsepower figures stated by manufacturers are at the crank... maybe. That could account for the AP being "Way off". But then... what do I know.

Maybe, or it just could be off because when I tried it out fully stock it came back with 300HP but with the stage 2 map and TBE w/ UICP it came back with 289HP.

Maybe, or it just could be off because when I tried it out fully stock it came back with 300HP but with the stage 2 map and TBE w/ UICP it came back with 289HP.

Did you have a firmware update between these two runs? How about atmospheric conditions, were they identical? Same Dyno? I'm not trying to be an ass, I'm just curious as to what could cause this discrepancy.

It does depend on the conditions. Also the road.

I have a G-Tech Pro Comp and the directions say to run in both directions then average the two. Its preferred to do mods in the same day and run on the same road then compare the % gained.

Kris

One of the big variables is weight. Unless you know the total vehicle weight including driver and gas, then the number will probably be off more than normal. FYI, according to the AP, the hp reading is at the wheels.

I asked the guy and he said his AP says he hits 320 hp & 348 tq on stage 1 93 oct 100% stock. He said he will try back to back dynos at the same weight to see gains (this is probably all that it's truly useful for IMO). I'm sure those are not ACTUAL whp numbers as that would be stupid high, but running a stock AP tune dyno would tell us where we are at vs. what mitsu says.

also, how fine is the data out of the AP...ie does it have spikes and such? I would try to normalize (smooth) data if it did.

I am assuming it outputs in Excel as I could get my dsmlink data to back in the day. If it does, plot HP and TQ as line graphs w/ RPM as the X axis data, and add trendlines that are "6th order Polynomial" to the HP and TQ lines as well. It will smooth the graph and get rid of blisters (probably will make TOO smooth of a graph, but this is how mitsu and other cars average out their HP figures).

If we know this, then we could get pretty close. I just hate seeing dyno charts where someone peaked 20 more whp over 300 rpms and claims that's thier dyno number. It's all about the curve!

Good luck, please let me know what you find out. AP is looking like a trick little unit.

The AP is probably giving an estimated HP figure "at the crank" instead of "at the wheels"... Since most horsepower figures stated by manufacturers are at the crank... maybe. That could account for the AP being "Way off". But then... what do I know.

This is true. It is suppose to be somewhere in between Crank and Whp from what I understand. I know it says wheels.

Interesting. I might have my buddy who is an Excel junkie to plot the curves when he gets a chance.

Did you have a firmware update between these two runs? How about atmospheric conditions, were they identical? Same Dyno? I'm not trying to be an ass, I'm just curious as to what could cause this discrepancy.

both where from the AP. Same conditions, but different days. The only thing different though was that on the 2nd one I did with the TBE, I was going uphill.