Dyno Plots

Matt and I swung by SpeedNation on May 25th to get a baseline dyno run before he put his JDM header on. Matt's car had been dynoed before, and the results were almost identical between his run today and the run a couple months ago. He was about 2 HP lower, but last time the oil was brand new, this time it was at the end of the cycle...the fact that the curves were so similar spoke volumes about the accuracy of the Mustang Dyno that Mike Ancas chose for his shop. We got to talking, apparently Dynojet dynos read much higher (another slightly modified Type R that was making in the high-170 HP range on a Dynojet put down approximately 155 on his Mustang), but more importantly Mustang Dynos don't seem as prone to variations in the curve (the same Type R put down the same 155 on several Mustang runs, but on the Dynojet he gained an indicated 10(!) horsepower between his first run and his fifth run, without changing ANYTHING! Mike explained to us that Dynojets are accelerometers, bassicaly giant G-Tech Pros. The Mustang is a power-absorption unit, and so its results are far more consistant...which is all that matters when you're trying to figure out if your mods are helping you or hurting you. The discrepency in results between Dynojets and Mustangs means comparison between the two is impossible, so Matt was happy to learn that his Type R's first run at 154 HP was comprable to other Type Rs. Since the Mustang doesn't give different results on different runs, rather than run Matt's R again and get the same result we threw my bone stock Type R on there to see how the two compared. I put down a 155 HP peak, and the torque and HP curves were nearly identical to Matt's car! The sheet below shows an erroneous peak Torque, something happened down low where I hit the gas, the "true" torque and HP curves are obvious. Check it out!

VTEC engagement is apparent around 6000 RPM. I'm going to be putting a Comptech short-ram intake on in a couple of days, and I'll dyno then to see if it provides any gains...then, when I get around to putting the icebox in, that might help some as well. Also, timing is a free adjustment...Dynos rule :)

Here's a look at how Matt's and My Dyno curves compare. Now, we know Honda does indeed make them like they used to! (his has 10 times the mileage of mine, even!)

UPDATE 7/26/01

Finally, the dyno and Matt and I were able to make a date and get some more numbers down...My only engine change was my Comptech Icebox, and then we played with timing some. Comptech shows gains over stock, particularly at the top end (as much as 6 horsepower!), and advancing the timing from 15 degrees (stock) to 18 degrees found a few more horsepower in the midrange...woo-hoo!