Dyno testing in PA

[Letitroll98]

Steven and I are going to Dyno test our cars on Saturday morning if anyone wants to go. The site is in Pottstown, PA and we're headed up some time before noon, prolly about 10:30. All are invited.

[oldsauroraman1]

Shazam. Where? Isn't that on Rt. 62?

[stevensolds]

Since Saturdays are by appointment only, if anyone wants to go that is, they should call these guys and let em know. 610-994-3867. I already set me and and Dan up.

Here is the site:

streetspeedusa.com/ -- look at the cobra

Price is $70 for 3 runs with A/F, 02 and wideband with printouts. I think they drive your car on it too. If not I guess I'll have to get em to cause i want to film it.

[oldsauroraman1]

Thanks for the info Steve.

[Aurora40]

Hmm, that's about 180 miles from me... otherwise I'd meet you guys there. Have fun! Will you be testing anything? Or just getting some baselines?

Edit: just so you are aware, for a wideband, they'll need to weld a sensor bung on your exhaust for the wideband sensor. No biggie, just be aware. I think they can cap it up or something afterwards.

[stevensolds]

Do I even need the wideband A/F then? What exactly is that going to do...make it a little more accurate? I just want a baseline, I want to see my maximum power/torque output. That is all. I'm sure they charge $40 for the 02 bung. Why cant they just take the 02 readings from the oxygen sensors. They are brand new anyway.


One thing I do wonder about is since mine is OBD1 they wont be able to get all the readings like fuel map, timing etc or will they?

[Aurora40]

stevensolds said:

Do I even need the wideband A/F then? What exactly is that going to do...make it a little more accurate? I just want a baseline, I want to see my maximum power/torque output. That is all. I'm sure they charge $40 for the 02 bung. Why cant they just take the 02 readings from the oxygen sensors. They are brand new anyway.


One thing I do wonder about is since mine is OBD1 they wont be able to get all the readings like fuel map, timing etc or will they?

Your O2 sensors are not wideband. Also, if they hooked up their stuff to them, your car wouldn't be hooked up to them, and it wouldn't run right.

You really don't need A/F readings since you can't do anything about it anyway. You can't tune the car. But it might be interesting to see if it's running rich or lean.

They aren't going to give you any timing or fuel map readings. The dyno doesn't measure that. You need some diagnostic or data-logging tools/software if you want to get that, and you don't need a dyno to do it.

You'll get a torque and power curve, and an A/F ratio if you go with the sensor. That's pretty much it. And be aware it will be from about 4,000 rpm up, since it's an auto. They can't get it to hold 3rd gear at low rpms at WOT.

[macadamiaman]

And be aware it will be from about 4,000 rpm up, since it's an auto. They can't get it to hold 3rd gear at low rpms at WOT.

I thought they could - using the shifter? Just shift from 1st, 2nd, etc?

[stevensolds]

That sucks. I was hoping to hear it wide open to 6,000RPM. Plus the fact that our autos are electronically controlled unlike most imports where you can shift it manually all the time and it will hold that gear. My moms last explorer would do that. If you put it into 3rd from a stop and floored it, it stayed in 3rd and slow as hell. Also it shifted down into 1st at 50 one time, lol. But I guess I will just see what power and torque curves are heh. Hopefully its not gonna be an embarassing read.

[Aurora40]

You want to use 3rd gear as it is 1:1 and thus has somewhat less driveline loss. But if you go to WOT in 3rd gear at 2,000 rpm, the car will downshift. It will only stay in gear at WOT if you are high enough in the rpm band.

[stevensolds]

I know what you mean Referred to as "kickdown" event, quickly slips down into 1st. I LOVE that sound though, where you are already accelerating easily until about 25mph and floor the gas, it SCREAMS to 6k rpm. Its so damn loud and roars. . Thats what i was hoping they would do there. Oh well. So I guess I will just get to hear it wind out in 3rd. Will they redline it do you think, even in 3rd? It will still auto shift to overdrive like that too btw, if you redline it. Dont forget.

[Aurora40]

stevensolds said:

I know what you mean Referred to as "kickdown" event, quickly slips down into 1st. I LOVE that sound though, where you are already accelerating easily until about 25mph and floor the gas, it SCREAMS to 6k rpm. Its so darn loud and roars. . Thats what i was hoping they would do there. Oh well. So I guess I will just get to hear it wind out in 3rd. Will they redline it do you think, even in 3rd? It will still auto shift to overdrive like that too btw, if you redline it. Dont forget.

They'll probably ask you what RPM you want it run to. Obviously they can't run it higher than the tranny shifts at. You should probably be able to get a nice graph of about 4,000 up to wherever it shifts.

The dyno can apply a fair bit of load, so it won't necessarily wind through 3rd as quickly as on the street, though 3rd isn't exactly a quick gear. You may get to hear it pulling for a bit.

[kobalt]

Im curious as to what my car actually puts down but Im afraid it is not broken in yet and should not be stressed at this point. Give it a month or two and I'll go to see for myself. My guess is that you guys will put down somewhere around 200hp and a touch more torque at the wheels.

[kobalt]

Im suprised there are no dynos somewhere closer in NJ?

[95rora]

Man thatll be cool, we can finally figure an exact measurement as to what kind of power the trans eats up and whats actually going to the wheels. It's gonna be interesting to see if the mods on Steven's have made a significant improvement.

Edit* Im a moron and just realized letitroll had added some nice features to his car. So lets see which one runs better. ;D

[Letitroll98]

Well, this thread will go on for a bit longer as there is a giant snow storm coming tomorrow and we are postponing. However I'm really up for it so we are only holding off one or two weeks for the first available schedule opening for both of us.

To answer a couple of questions, Steven has all the airbox mods I do, K&N filter (maybe I'll do a secret squirrel and sneak in an air box gut, heh heh). Steven has aftermarket mufflers and mine are stock, we both have stock wheels and tire sizes, and our mileages are similar. I have the autobahn's higher final drive ratio and Steven's is standard. This won't affect any power ratings at the crank, but there could be some minor difference in tranny loses, but I would doubt it. So at the end of the day, I would guess the test would be for the difference resulting from aftermarket performance mufflers, a worthy goal IMHO.

kobalt, as far as location, this started with Steven doing me a favor that I was going to run over to PA for. Then he mentioned the dyno test he set up for he and his dad and the thing was on. We decided to post here in case anyone local wanted to come along and that is of course still open. The delay might even allow somebody to make it at the later date, so it's all good.

[Aurora40]

Hmm, well let me know when you all end up going. Maybe I'll meet you all for a dyno pull instead of meeting you for Carlisle. I will probably go to Bowling Green for the ZR-1 Gathering, and may go to 'vettes at Carlisle, so I might not be up for that many car shows in one year (I'm not a show person). A dyno might be more fun, and it would otherwise probably just be the three of us at Carlisle anyway.

[kobalt]

The snowstorm is huge as I type this. Perhaps this delay will allow me enough time to break the car in before you decide to dyno. Ill make sure to watch this thread closely.

[stevensolds]

yeah...even the $800 snowblower we have isnt doing very well, it is 21 inches here .

[macadamiaman]

$800 snowblower?? We just hire people, and shovel the little parts... lots cheaper. Then again the driveway is like 1/8th mile and dirt

[95rora]

Ive got an excellent snowshovel for you guys on the east coast. Its in the form of a 77 Jeep CJ-7 that my dad bought which has a 7 1/2 foot Meyers plow on it for plowing the lane at home.

[kobalt]

So...when is this dyno happening?