? about amount of HP my car made

[SliverStang]

well right after I left they dynoed a turbo import and they said it was right where it should had been.. I dunno i plan on gettin the nitrous back running and taking the car back to tune a big shot of nitrous then when that is dailed in right ill be taking it to the track.

 

[SliverStang]

ok it was a 4 gear pull

 

[347HO]

I find it funny that you will take track numbers as fact when there are variables of weight, traction, and driving ability that will change the numbers dramatically and will in no way give factual proof of how much horsepower he has. Given his track times and speeds, you could only estimate his power in probably a 50hp window.

Keep laughing... there are a bunch of smarter people than you and I who use ET and trap speed to pretty much accurately calculate what they have under the hood.
50hp increments? Where did you pull that piece of fact from?

 

[347HO]

ok it was a 4 gear pull

I meant rear gear... and I think you're pulling everyone's chain here.

I'm done with this silliness.

 

[SliverStang]

dude look at my post count and my membership sign up date.. ive been a member here for a long time. I just was asking yall's opinion because I personally felt that the car was making to much power. I talked to the guy who owns the shop and he said it was a 4th gear dyno pull. I assumed it was a 3rd gear pull because that is were I do most of my data loging with my LM-1 on the street. I was informed that 3rd was the leanest of the gears so I tuned my car in 3rd gear. I talked to the guy who built the motor and he said that i should be puttin down 400hp or so but I just wanted some more opinion's the motor is prolly 3 years old I just never have dynoed it before.

 

[mazroth]

Had mine dyno'd at speedys, and tuned. Baseline was alot lower.

 

[ninety15.0]

Your numbers are pretty high too though! 350rwhp from an AFR165/FTI/GT-40 combo is not the norm either.

Somewhere around 300-325rwhp would be the norm for an HCI 306 like that. I wonder how they are calibrating their dyno...or how they are correcting the numbers.

 

[03-s281]

Had mine dyno'd at speedys, and tuned. Baseline was alot lower.

You have a really well built motor if it made 350/400 on his dyno. My 347 put down 341/367 on his dyno and he said that was good for his. He did tell me roughly what it would be on a Dynojet and it was much higher.

 

[NKau]

4th gear is 1:1, and as stated, this is where a 5spd car should be dyno'd.

Why does the dyno sheet say '87, when you have an '86?

The track is nice, IF one can drive.

I have raced zo6s that run high 13 second quarter mile times. So at 3200 lbs, what would the HP output be?

The dyno takes this variable out.

Both the track and dyno have their place.

Trap speed and weight are what you use to calculate HP. E.T.'s don't have anything to do with it. The track is the best horsepower calculator.

 

[SQUEEZE&STROKE]

I think the numbers are only a LITTLE high.

My 331 with trickflow stage 3 cam, victor jr heads, vic jr manifold, holley 750 hp carb, t-5, shorty headers and off road 2.5" H-pipe.

My car made 407 RWHP and 380ish tq at the rear wheels. Cant remember what the dyno was, but it was not a mustang dyno...it was an older one.

 

[5spd GT]

Trap speed and weight are what you use to calculate HP. E.T.'s don't have anything to do with it. The track is the best horsepower calculator.

Um, not if they trap 109 MPH, when they should be getting 116-117 MPH.

I have seen ls1's trap high 90-low 100 MPH, out of the T56.

I have seen stock 5.0Ls run mid 80 MPH.

I have seen LT1s run low 90 MPH.

So can you guess how much horsepower they have?

Or can you guess if the driver was skilled?

Your pick

 

[25thmustang]

Mph does give an idea but not the be all and end all. My car has trapped from 104.6 to 107.8 with the EXACT same set up, same race weight and everything. I have even seen from 83.8 to 86.2 mph traps in the 1/8th on the exact same day, two runs apart. Driving the same, within a tenth on the 1/4 number, just the mph wasn't consistent.

The track is good if your a racer looking for a number but for the average guy a dyno will give you a number you might want.

 

[NKau]

Um, not if they trap 109 MPH, when they should be getting 116-117 MPH.

I have seen ls1's trap high 90-low 100 MPH, out of the T56.

I have seen stock 5.0Ls run mid 80 MPH.

I have seen LT1s run low 90 MPH.

So can you guess how much horsepower they have?

Or can you guess if the driver was skilled?

Your pick

But you will agree that with a COMPETENT driver, that should not be the case.

Running 25th's numbers through a calculator I get 294.75 rwhp for his low trap, and 322.64 rwhp for his high trap (assuming the car weighs 3300 lbs. with driver). That's a bit of a wide range, but I trust that more than any dyno numbers that get posted up.

If you take an average of 5-10 runs, or the most consistent trap speed you typically run, I'm pretty sure that will give you an even better idea of the actual power you are making.

 

[mazroth]

Your numbers are pretty high too though! 350rwhp from an AFR165/FTI/GT-40 combo is not the norm either.

Somewhere around 300-325rwhp would be the norm for an HCI 306 like that. I wonder how they are calibrating their dyno...or how they are correcting the numbers.

Its corrected at std. Most say sae is what people use, which is 4-5% (ive read) less than std. So taken my numbers minus 4-5% is 330/380 or so. Then I have read that people say the superflow dynos read up to 15% higher. I think there is just alot of bs out there, cause some individuals dunno what they hell they are speaking about. So some figure since mine was on a superflow type dyno and rated at std, the numbers actually are around 280/320, they must be on crack.
My motor was built, only stock parts that were used is the mexican block, rest was aftermarket. I remember seeing a individual with a sn95 car on this same dyno with a tfs kit on it, and it put down 270/280 there about. The differences are is my stuff is not stock, some of it is ported, and it has no ac, no smog, no ps, and an elec fan. Basically, my point here is that if its not dyno'd at the same place, you cannot compare, or you can compare, but only at the track.

There are a few other members of others sites i have talked with, very similiar combos as mine, no accessories, match components, most have different cams though, and numbers have been 340/360, 330/340, 310/360, give or take a few numbers, cant remember them exactly.

 

[03-s281]

Its corrected at std. Most say sae is what people use, which is 4-5% (ive read) less than std. So taken my numbers minus 4-5% is 330/380 or so. Then I have read that people say the superflow dynos read up to 15% higher.

A Superflow will generally read 8-12% lower than a DynoJet. Not higher.
Thats why I thought yours seemed high.
Do you have your graph?

 

[25thmustang]

But you will agree that with a COMPETENT driver, that should not be the case.

Running 25th's numbers through a calculator I get 294.75 rwhp for his low trap, and 322.64 rwhp for his high trap (assuming the car weighs 3300 lbs. with driver). That's a bit of a wide range, but I trust that more than any dyno numbers that get posted up.

If you take an average of 5-10 runs, or the most consistent trap speed you typically run, I'm pretty sure that will give you an even better idea of the actual power you are making.

The interesting thing... a little over 3200 lbs, and it made 256/295 on the dyno!

 

[5spd GT]

But you will agree that with a COMPETENT driver, that should not be the case.

Go read what I said on the first page.

It would agree with that statement and it would be much more accurate.

Read 25th's HP numbers.

The dyno takes out many more variables.

It is not the end all. I like the track as well, but a dyno removes headwind, tailwind, track prep, shifting RPM, shifting speed, launch, more adverse temp changes, with no corrections or standards, sea level or 5000 ft, et al.

 

[347HO]

Go read what I said on the first page.

It would agree with that statement and it would be much more accurate.

Read 25th's HP numbers.

The dyno takes out many more variables.

It is not the end all. I like the track as well, but a dyno removes headwind, tailwind, track prep, shifting RPM, shifting speed, launch, more adverse temp changes, with no corrections or standards, sea level or 5000 ft, et al.

Dyno adds the worst variable of all... the throttle man.

 

[mazroth]

A Superflow will generally read 8-12% lower than a DynoJet. Not higher.
Thats why I thought yours seemed high.
Do you have your graph?

Here is a link to one of the graphs, some others are on corral, but post is old, can do a search for 306 dyno and find it.

http://www.kyhorsepower.com/forums1/index.php?showtopic=30287

 

[5spd GT]

Dyno adds the worst variable of all... the throttle man.

Not in my experience

I have seen way more inconsitencies at a track, than a dyno.