bradyzq wrote:As a dyno owner/tuner, this kind of speculation drives me nuts. First off a Dynapack is not an eddy-current dyno. Second, the way the dyno operator performs the dyno pulls can have a huge impact on power numbers, regardless of what dyno is being used. Hank's dyno IS an eddy current dyno, and depending on how he sets up his pulls, he too can generate quite a range of outputs for a given car.
So, you've heard that eddy-current dynos read higher? Higher than what?
I've had a car (Honda S2000) read within 2 hp (1% difference) between my Dynapack and a Mustang dyno. But the runs were performed in a similar fashion dyno-to-dyno.
So, you think that an Audi 200 20V that reads around 665 at the wheels on Hank's dyno will keep up with Nick's 780'ish on a Dynapack? Don't think so!
Just for comparison, a similar weight B5 A4/S4 swap with 650 at the wheels onmy dyno did mid 10's and best trapped at 140mph.
Congrats Nick! That's a beautiful set of curves!!!
Brady, I understand what you are saying, and yeah, type of absorber should't matter at all.
That said, if you are using standard correction on a dynopac and letting the weather station do it's calculation with normal tire pressure and normal cool downs, etc, it should be the same across the board for dynopacs. Marc and my Land and Seas just read low. We don't fester with them or fudge anything at all to make them act like a mustang or a dynopac. We could, but horsepower isn't dependent on a dyno, but rather the magical formula of air plus fuel plus bang at the right time. Spool can be altered 100%. Like you said, if the dyno operator used more brake to slow the pulls down, the pulls should match the logs on the street, which is around 6200 rpm from what I have seen.
I bought my dyno used, and the previous owner added a standard correction to their plots to get them up to Mustang levels. They advised me to keep it set at zero, and just take flack. I have done that and feel good about it. Their chipsets, tunes and stock cars make around 7% less across the board, but in the end of the day, it is just about deltas and baselines.
Nick sent me his logs about a week ago from some 3rd gear pulls, I looked over the data, gave my suggestions for timing based off what I have seen on BT 20vts, and gave my speculation for horsepower. With Sean's 07k car at 645whp on my dyno it was consuming ~6500cc worth of fuel at 90%DC on 1390cc worth of injector ~.80 lambda. Looking at Nicks logs, he was running about 58% DC on 2200cc injectors for around the same amount of fuel at the same lambda, but not nearly enough timing from my experience. I guessed based off my dyno what he would make(roughly the same amount as the 07k car plus a little becasue of increased turbine flow), then gave him an estimate off what I have seen on dynopacs local to me at about 15-16%, and told him I thought he would make 720whp in his current tune on the dyno, and 780whp with more timing. I can load up the conversation if you want
So yes, I would bet a lot of money at 665whp 200 on my dyno would be even with a dynopack 780whp, especially if they are using the same amount of fuel.
So yes, I see it on a weekly basis. Guys come from dynopacks and dynojets, get on my dyno and freak out. I explain weekly to customers of tuners that rent my dyno that my dyno just reads low. Nothing wrong with that. I have a 2850lb e30 m3 trapping 152mph at 9.7 with 620whp on my dyno with GTX3582r on 1.06 hotside. That is a pretty bitching trap for 620whp.
Regardless, a ton of power. Congrats man. Wicked dedication and planning. Well done.
Sorry I had to be THAT guy 
