RyanJ

What do most of you guys like more, the above-ground 248 or the in-ground? How many of you really like to have a Wideband around if and when you need it. Would any of you go to a Dyno-only (or mainly Dyno..small installs and stuff) shop? Have any of you ever seen or heard of an interest in a motorcycle dyno, one that maybe travels? Sorry, just kind of polling interests.


Ryan

BIGBOS

I've been to 2 different dynos one above ground, one in ground...I like both...I also like getting the wibeband O2...after you've been modding your car it lets you know what your doing...

I've seen some stuff about the traveling motorcycle dyno's on speedvision...those seem to be pretty expensive....

blackhawk2000

I like the Mustang Dyno.

99BlueZ28

[quote]Originally posted by blackhawk2000:
<strong>I like the Mustang Dyno.</strong><hr></blockquote>

Can someone explain the major differences between the Mustang dyno and Dynojet? I've always wondered.

RyanJ

the mustang dyno take other things into account and puts a greater load on the figures i think. i think thats why the read lower than a DJ.


Ryan

DenzSS

The main problem with Mustang Dyno's is they do not correct to SAE.

RyanJ

ttt

Godspeed

All my experience have been with in-ground Dynojet 248's. The above ground model should function the same, but I consider wide-bands a must. They are essential for any tuning purposes especially forced induction and nitrous.

-Jeremy

CMNTMXR57

We in the MFBA have dyno'ed at three facilities. Two are above ground DynoJet 248c's and one is an inground DynoJet 248c.

Dyno'ing between the three, the numbers are consistent with things like weather conditions playing the difference depsite any corrections.

I also feel the mustang dyno puts out wayyy to low of numbers.

RyanJ

cool. looks like the in-gound 248 w/ wideband in the favorite.

Any comments on Dyno-only (with possible small installs, and n2o installs) shops?

Any bike guys here?


Ryan

CMNTMXR57

Also too, correct me if I'm wrong, but doesn't the mustang dyno use a two rollers for each wheel? I think this is bad for the tires.

Ragtop 99

iTrader: (7)

I don't see a whole of point to dynoing unless you have a wideband or are using it as part of a controlled test. I've gone to dyno days primarily to hang out.

You tune with a maft on a dyno or see if HPP3 tuning works, but that can be done at the track too. <img src="images/icons/grin.gif" border="0">

RyanJ

true, dynoing is a tuning tool. but how many people know this and adhere to this? most people just want to have horsepower...and more than that guy over there.


anyway...anymore experiences?? like tuning and paying by the hour? did the operator really tell you anything about your car/dyno? was anyone helpful (for no more than the cost of the dyno) in tuning the car?

Also, for you members more in touch with shops (ahhem ahhem Chris, Tony) how much is the average 3-run charge? and average number of dynos on any given day?

Thanks again

CMNTMXR57

[quote]Originally posted by Ragtop 99:
<strong>I don't see a whole of point to dynoing unless you have a wideband or are using it as part of a controlled test. I've gone to dyno days primarily to hang out.

You tune with a maft on a dyno or see if HPP3 tuning works, but that can be done at the track too. <img src="images/icons/grin.gif" border="0"> </strong><hr></blockquote>

The dyno helped me considerably in sorting out my PCM tuning issues without having to prep the car for racing (tires, suspension, etc,etc), driving to a track 75 miles away, possibly breaking something (I.E. blowing another clutch and grenading my rear end) only to "hope" my Auto-Tap logged whatever info I could get before breaking the car on it's trip down the track.

RyanJ

good reason for a dyno...

one more thing. could one dyno FWD vehicles on the same dyno?

TIA
Ryan

DenzSS

A dyno is an indispensible tuning tool. We've diagnosed and corrected more tuning issues on a dyno that all of my trips to the track. That said, it is just a tool. It is not the be-all-end-all of the automotive world. It is a controlled, repeatable environment that allows the gathering of comparable metrics.

Once you add wideband O2 and data logging, it all gets a lot easier. Nothing but gravy.

If you want to talk consistency, ask your Dynojet owners about the spec racers. The little Escort engine powered guys. Small 4 cylinder engines that by regulation can only be provided by one manufacturer. You are disqualified if you crack open the engine. They dyno around 100-110RWHP. They made the rounds of Dynojet shops during their racing season and came up with some pretty interesting results. Dynoing in Kansas City, Colorado, Florida, and a couple of other places the variance between corrected numbers averaged 1%. Pretty damn close.

That kind of consistency plus track times gives us all a good head start. We know what to expect with any given modification. Sure, there are some guys out there on the bleeding edge making up things as they go. The far majority of us, however, are just taking what they've learned and running with it. With dynos, data logging, track times, and the Internet, building a fast car is a hell of a lot easier than it used to be.

[ November 16, 2001: Message edited by: DenzSS ]

[ November 16, 2001: Message edited by: DenzSS ]</p>

RyanJ

pretty cool info with the whole 1% thing. thanks.


I really want to hear personnal opinions of dyno shops -- what you liked and didnt like, etc. also, any more hardware info on dynos is welcome.


Ryan

DenzSS

FWD--yes. Just a different set of wheels driving the rollers.

Here's the successful formula for running a dyno.
1) Dynojet with Wideband O2. Mustang dyno's MAY be better at some things, but everyone wants SAE numbers. Wideband is not necessary, but anyone who is serious wants it. Add wideband and the big guys will show up.

2) Reasonable price. A baseline run in Kansas City is $52 for 2-3 pulls.

3) Demand. If there are a bunch of dyno shops in your area, you're not going to make money.

Pretty simple.

y2khawk

iTrader: (5)

[quote]Originally posted by DenzSS:
<strong>The main problem with Mustang Dyno's is they do not correct to SAE.</strong><hr></blockquote>

not true

they will correct just fine. They are used as EPA test dynos after all.

I'm a big fan of the Mustang dyno. I've done all my tuning on one. I would much rather run the vehicle on a dyno that will supply a load that is close to real world "street" load.

In fact, i was at the shop last night w/ a buddy's car on the dyno. mustange dyno of course. The shop owner brought a very valid point to light.

For those of you that have used/seen/experience a real engine dyno think about it. All engine dyno stands consist of some type of loading device, ie water brake, eddy current brake, etc, and a torque arm/load cell assembly. They have the ability to apply variable load to the motor, step load points, rpm points, etc.

You will not see any engine stand that just accelerates a known mass.

Yes, a dynojet has its place. But for me, if i'm tuning my car i would much rather have a mustang dyno on hand.

just my .02

I'd love to get the car on a dynojet and see just how much higher my numbers are <img src="images/icons/wink.gif" border="0">

Ragtop 99

iTrader: (7)

don't get me wrong, I'm going to wideband dyno tune in 2 weeks because my car is way off and unlike the track I won't wait an hour between adjustments.

I just see a lot of people dynoing for the hell of it. But the track is much more fun. <img src="images/icons/smile.gif" border="0">

Back on topic, when we do dyno days, it is $50 - $75 for 3 pulls on a dynojet.