redskittle

my tuner says that the mustang dyno reads significantly less then a dynojet... anybody agree?

B18 CYA

my friends uncles sisters brother-in-law's dad says that a mustand dyno reads significantly less than a dynojet

alpha

You can run a Mustang Dyno loaded or unloaded. Unloaded numbers are similar to Dynojet numbers. Then again you can change Dynojet's software settings to show higher numbers.

david@didrace.com

We have a Mustang Dyno at our shop. The difference between a DynoJet and a Mustang Dyno is all Mustang dynos are Eddy Current which means that they have a really big electric brake on the drums that ends up loading the engine. Most DynoJets are inertia type which means they just have the inertia (rotating weight) of the dyno to semi-load the rollers.

What this means is that you can part throttle tune with a Mustang dyno, spool up turbos properly, run 1/4 mile runs on the dyno, etc. If you were to do any of this on an inertia type DynoJet have fun because you're only spinning two metal drums that weigh X amount. Some DynoJets are eddy current (not the cheap $25k units most every shop has) but for actual hp runs it does not use the eddy current brake because then people would start wondering why there's differences in hp output between DynoJets (talked with a DynoJet rep at the PRI show in Orlando).

A Mustang dyno has the operator input the vehicle's weight and a figure which is called the 'HP at 50mph' (which means how much hp it takes for a given vehicle to maintain 50mph on a flat road... read: aerodynamics). With that info the dyno's computer can accurately calculate how much load to put on the eddy brake so it can properly load the engine, it can also simulate going up hill, downhill, and can load the vehicle to the point where you can tell it to maintain the vehicle at X mph and it will load the vehicle so that if you're in a certain gear at a certain rpm you can ease into the throttle and it will maintain the rpm/speed (awesome for tuning speed density cells!!).

In the end, a hp # is just that, a number. I can guarantee you that in a 1/4 mile race two identical vehicles other than motor, one putting out 400 hp on a DynoJet and one putting out 400 hp on a Mustang dyno, the 400 hp one from the Mustang dyno is going to win. Hp #'s should be used just as a tool, baseline on any given dyno, modify motor and then run again on that exact same dyno.

If You Slip You Die

mustang dynos generally read lower then dynojets

PTR1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">You can run a Mustang Dyno loaded or unloaded. Unloaded numbers are similar to Dynojet numbers. Then again you can change Dynojet's software settings to show higher numbers.</TD></TR></TABLE>how do you change the dynojet software settings to show higher numbers?

Boosted-Bora

I fully agree the dynojets always produce more numbers the mustangs are always lowballin people...LOL

redskittle

if i only get about 325whp on 15psi and 410whp on 21psi i shouldent be mad if its on a mustang dyno.. for instance, the cft civic made 759 on a dynojet and 683 on thier mustang...

dunkd

dyno's are for tuning purposes.

track's are for seeing how fast your car is.

all dyno's are calibrated differently so it is hard to compare numbers between two different dyno's. for the most part mustang dyno's do read lower though because they are a more accurate "REAL LIFE" horsepower number. which really means nothing these days to most people.

redskittle

the old tune i went 10.9 @ 134 w/ 397whp on pump gas 17psi and 10.7 @ 138 20psi on c16 with 458 whp on a dynapack im looking for about a mid 11 second car on pump gas and 15 psi and a 10.4-10.5 on c16 with a 138-140mph trap