Yes...both Does it feel like it's only got 120hp Demand a rerun...They didn't do it right

 

I thought it may be the tech but he is trained for the dyno tho he's never done a MINI before .He also said that during the test in 6th gear he had trouble getting it up to 100mph. I have noticed no drop in performance at all.Very puzzling,

 

Ask the dyno technician 1) what is the HP at 60mph settings, 2) what his equivalent weight setting is if they are in "vehicle simulation" mode (variably loaded rollers). If they are in "control sweep" mode (closer to dynojet style test), then they've got big problems. If the latter is the case, they must calibrate the torque arm. If you get answers and want my worth-its-weight-in-gold opinion, gimme a call.Long story short, if your car feels anywhere near normal on the street, then they have problems with their dyno or dyno operator.

 

The HP at 50mph is 13.5

 

Ummm .... why were you dynoing your MCS in 6th gear? Try 4th, just like everyone else.

 

D'oh!

Didn't catch that. Ouch, sixth gear? With a 13.5hp at 50 and in 6th gear, those runs must have taken 40 seconds each to complete. How's your motor? I'm amazed you didn't overheat.

BTW, we calculate 10.5 at 50: it's a small car.

 

I had a similar issue with a Mustang Dyno with my twin turbo Stealth. Me and another club member with a 3000VR4 ran back to back, both expecting at least 300 horsepower with our setup, I know his should be over 300 based on multiple similar setups. I only ran 260hp with 300 torque, so I thought my setup was off, no big deal. However, when the other guy ran his, it was only 284 hp at the wheels, which told me that the mustang dyno or operator may be the culprit. Also, mine was a 5spd, his a 6spd, and the tech ran them both in 3rd gear, which can't be right. Unless your car is running foul, I'd bet other cars with your setup would run similar numbers on that particular machine as well. So many variables to worry too much at this point.

 

Here is a correct way to feed cold air to your supercharge for your next dyno test.

 

that method looks familar...I've seen several cars going down the road that look just like that.

 

The dyno test numbers were done in 4th gear .6th gear was only used for top speed.

 

In my experience, Mustang dynos typically read lower than Dynojets, for example. That's for AWD, though. I dunno if it's as bad in FWD mode.

 

I'm not sure why you would really care what the actual flywheel Hp is. We use a Dynojet at our shop that does not try to estimate the flywheel Hp. I know the Flywheel Hp is higher therefore worth more bragging rights but the power at the wheels is what gets you down the track or to work to pay for more goodies. By trying to calculate the flywheel hp you are throwing in alot more variables that could just as well be left out.

BTW, my wifes '04 MCS dynoed @ 160.9 Hp at the wheels shortly after break-in with no modifications. Based on all the runs we have done on turbocharged MR2's I think its right on the money. I figure the MCS's are rated a bit low.

my $.02

Todd

 

No offense, but how does dynoing MR2s have anything to do with a MINI? B/c they're both front wheel drive and use compressed air???

 

You are right they both use forced induction but MR2's are mid-engine rear wheel drive. The only point I was fumbling around to make is that we have lots of experience baselining bone stock mr2's rated at 200 flywheel hp. Most of the time on a properly taken care of engine we see between 160-170 Rear Wheel HP. that comes out to about 13-15% drive train loss. That means we can believe the 200hp rating. Being that both cars use transaxles I think we can assume that the Dynojet is reading a valid Wheel HP on the mini. No more calulations needed.:smile:

 

But the MINI is front-wheel.

 

VW R32

174hp at wheels

http://forums.vwvortex.com/zerothread?id=1242453

MITSUBISHI EVOVIII

180hp at wheels

http://www.vishnutuning.com/lancer.htm

Nissan Z

235hp at wheels

http://www.activetuning.com/pat/4/1/

VW GTI

147.3 hp at wheels

http://www.vdubnut.com/337/gti337.html

MINI COOPER S

144.1hp at wheels

 

Yup and the MR2 turbo uses the same transmission as several other front wheel drive toyotas. Its a frontwheel drive setup in a mid-engine configuration.

 

My question was, how can the MINI give a valid REAR WHEEL HP on the dynojet if it's front-wheel???

 

OOPS! you got me there! I am just used to talking about Rear wheel Hp. I edited my previous post.:smile:

 

If you say that based on MR2 runs (which you said above result in a 13-15% driveline loss), your wifes dyno run of 160.9hp at the wheels is right on the money. Yet what your wife got is basically showing 0% driveline loss, since an '04 MCS is rated at 163hp from the manufacturer. So really they don't compare. I think the rating your wife go was high. The average appears to be in the 140-145hp at the wheels.

 

My whole point originally was that trying to calculate the actual Flywheel Hp is at best a guess. I was also trying to demonstrate that the 160.9 WHEEL Hp is believable based on the rated flywheel Hp and the actual Rear wheel Hp. of an Mr2 with basically the same drivetrain setup. You are absolutley correct about My wifes car showing 0% drivetrain loss. This is because the dynojet measures Actual Wheel Horsepower and dosen't try to figure the Crank Hp.
You also need to take into account the brand of dyno being used as well as the correction factor. We use STD. correction factor on a DynoJet 248C

One other thing. We Usually spray water from a garden chenical sprayer on the Intercooler during dyno runs due to the lack of airflow on the dyno. This is a precaution to keep from damaging the motors. We used to just spray the water between runs to cool the IC back to about ambient. After seeing the remaining water BOIL off the Ic on a Pulleyed car during a 4th gear pull, I decided to do throuought the run for safety. This practice seems to get us slightly higher Hp #'s about 2-3 depending. But I now do this on Every Mini I dyno so the #'s will be consistent.

 

The Evo 8 puts a lot more than 180 at the wheels, each one that I have seen has done at least 230, Stock.

 

Considering that the 350Z and Evo VIII weigh close to the same and run the 1/4 mile in similar time and trap speeds I would agree with you.

 

That EVOVIII dynoed with 91 fuel. Remember that EVOVIII is AWD so that put it next to Z. ...

 

dID THAT THREAD HAVE THE CIVIC SI STOCK HORSPOWER. CESIDE THE CLAIMED HP.