dyno numbers i can't believe, check this out!

mr.b · Nov 5, 2005

obviously i could care less about bragging rights (aka, inch matching),since i said i couldn't believe it. but, here is a picture of it for the hell of it since jackchan asked for it.

4th gear pull from 2500-5000rpm

speedytang · Nov 5, 2005

I can make a car produce about any number on the dyno with just a few key strokes, so I would say something is not within range on the information sheet.

mr.b · Nov 5, 2005

so what keystrokes can press to make this happen? do tell? do you own a dyno? that's what i want, information as to why. its not like i am sitting around with a big wood because i have a 245rwhp beastmaster. I am just very interested as to what the problem could have been.

352Ford2 · Nov 5, 2005

At the hot rod shop I used to work at there was this one dyno we would always send customers too that wanted their magical HP number. It was nice and sloppy. That way the dude could claim he has "400 horse power"

j

mr.b · Nov 5, 2005

i expected 185-195 hp, we all new it was stock and this is my friend who owns the dyno. we were just trying to figure out what may have been wrong. checked all the settings, over and over. made 7 pulls for consistency.

jackchan · Nov 5, 2005

when you do figure it out.....please post. And thanks for the dyno sheet scan!

Have you always owned this car? could it be that the engine had a problem early on and the ford dealer changed engines i.e. bored it, changed cams, etc.?
Jack

mr.b · Nov 5, 2005

i have only owned the car about a year. i am the 3rd owner. it is bone stock. intake, headers, cats, all stock stuff. i am curious to see what becomes of this, i know they will be trying to figure it out come monday. i will let you know what the prob. is when i, and they, figure out what it is. the mustang dyno is usually lower and i know it lets a lot of their customers down when they show up expect high numbers. just like the last guy wanting to put down 600 rwhp and only put down 480, with his 408 procharged mustang. everybody is use to dynojet numbers, which i feel are a little high.

TheShagg · Nov 5, 2005

First of all, i think you misread the page about the dyno and gears. Gears can easily screw up your results (but they wont change your power, just how the dyno interprets it).

First step would be for you to confirm that the RPM on that graph corresponds to the RPM of the engine. Was there a wire from the dyno going to your plug wires or anything?

mr.b said:
i have only owned the car about a year. i am the 3rd owner. it is bone stock. intake, headers, cats, all stock stuff. i am curious to see what becomes of this, i know they will be trying to figure it out come monday. i will let you know what the prob. is when i, and they, figure out what it is. the mustang dyno is usually lower and i know it lets a lot of their customers down when they show up expect high numbers. just like the last guy wanting to put down 600 rwhp and only put down 480, with his 408 procharged mustang. everybody is use to dynojet numbers, which i feel are a little high.

GroverDill · Nov 6, 2005

GroverDill said:
messed up calibration on the dyno.

JBA here in San Diego has a overly friendly dyno as well.

the baseline tune is off.

its not you friends fault.

dstanggt50 · Nov 6, 2005

well, it sounds like you already know what to expect from a stock 5.0, but if you want to see it on paper, I would just go to a different dyno. Its cool to get a baseline, but w/a car so stock, and knowing what its probably going to put down, or should put down, I wouldn't bother spending the $ to get another dyno run.

Speeds8erM-1 · Nov 6, 2005

Mustang dynos are VERY easy to get false numbers from. The dip**** running the dyno has to input almost everything and can vary alot with the load. Mustang dynos are supposed to read lower, when it reads 45 hp higher than a Dynojet, it's wrong. Your car doesnt make 245, period, ESPECIALLY running rich, on a MUSTANG DYNO.

Simple way to fix this, go run it at the track, when it doesnt run 104-105 MPH, you know the dyno is on crack.

mr.b · Nov 6, 2005

yes, it was reading the rpm correctly. also, the mustang dyno website said that with a big gear change you would still only see about a 5% difference.

Speeds8erM-1, if the mustang dyno is easy to get false numbers from, how do you do it? tell me everything so i can match it to what we did.

just4bob50 · Nov 6, 2005

When i put my supercharger on i had my car tuned on a mustang dyno. With 6psi of boost and an ambient temp of 92 degs ( humid as hell ) I put down 264hp and 300 tq. Since then ive added a power pipe,more timing, and a little more fuel. I havent been back to dyno since the last mods but after the first tune the car trapped at 106.1 and now it traps at 108.9. so i would say its a about 285hp on a mustang dyno now. On the mustang dyno there is a function on there that will let it read like a Dyno-jet. If your car is actually making that hp you should be able to run low 13's no problem

dead · Nov 6, 2005

RacEoHolic330 said:
And that's at the flywheel too. So it's around 195 stock at the wheels

I'll be the first to throw the flag

That'd be around 195 on a Dynojet, too! A Mustang dyno would be even worse. Unless you're running a supercharger under there and don't know it... =\

Speeds8erM-1 · Nov 6, 2005

mr.b said:
yes, it was reading the rpm correctly. also, the mustang dyno website said that with a big gear change you would still only see about a 5% difference.

Speeds8erM-1, if the mustang dyno is easy to get false numbers from, how do you do it? tell me everything so i can match it to what we did.

You can change the load, input your own weather conditions, then input the gear ratio, weight and everything. I know one local pathological liar that went to a Mustang dyno and they played with everything to give him a big number to post. They are kind of weird. Good for tuning a turbo car but thats about it and even the newest Dynojets have the Eddy Current Loading like the Mustang dyno.

Speeds8erM-1 · Nov 6, 2005

Oh and I wasnt trying to be a d!ck, it just sucks that shops are putting out these unbelivable numbers, basically a waste of $$$$$ for a baseline pull.

90lxcoupe · Nov 6, 2005

mr.b said:
i have only owned the car about a year. i am the 3rd owner. it is bone stock. intake, headers, cats, all stock stuff. i am curious to see what becomes of this, i know they will be trying to figure it out come monday. i will let you know what the prob. is when i, and they, figure out what it is. the mustang dyno is usually lower and i know it lets a lot of their customers down when they show up expect high numbers. just like the last guy wanting to put down 600 rwhp and only put down 480, with his 408 procharged mustang. everybody is use to dynojet numbers, which i feel are a little high.

with a 408 and a procharger he should have made way more than 480. thats what my car put down and that was just with a base tune and it blew a head gasket at about 5600 rpm's

331 stang91 · Nov 6, 2005

How are you so sure that there arn't any "goodies" under the hood did you own the car since new? Maybe the stock heads were ported buy the last or second last guy? Did you check for a chip. Just throughing things out there.

mr.b · Nov 6, 2005

we double checked all the drag coefficient numbers, vehicle weight, etc. Nothing was done to increase the power output numbers, i have nothing to gain from all this, i just would like to figure out why. the dyno owner (my friend) didn't believe it either and rebooted the machine and rechecked all the other inputs. They have never had anything else like this happen before. and usually cars on their dyno read a tad low (being a mustang dyno). It was nice to get an airfuel on the car for the heck of it. Which was rich at 11.8 max. stock air meter, throttle body, headers, intake, silencer still in, original spark plug wires, as stock looking as i can tell. I didn't even have to pay to have this done, we just dynoed it to kill time. its not like i showed up wanting to get a big hp number on paper, nobody would believe it anyway (including myself). they just recently had a gt with a gt -40 crate motor and exhaust which put down 265 at the wheel.

the weather station for the dyno is set to autmatically compensate, but it was about 70degrees that day, nothing especially cold. it has a 2.73 gear in the car also.

mr.b · Nov 6, 2005

i will probably hit it again this weekend. they will be having an open house so i will get to see what a lot of other cars are making. if i feel like it is showing believeable numbers with other peoples cars, i will dyno it again. unless they figure out the prob. before then.

dyno numbers i can't believe, check this out!

mr.b

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