Jockobo

this is on a stock ls motor with arp head studs and cometic head gasket and straight T3 at app 18 psi...the video is of one of the pulls in 3rd gear where the tires spun...kindof disappointed with the hp but surprised with the torque...the rpm on the dyno sheet is messed up because they probably had the pickup set for a 8 cylinder or something...not really sure how dynos work...but it was revved to 6500...peak numbers are 246hp/292tq

http://www.we-todd-did-racing....5NTQx

pro547

That is a nice video. I hope my car puts down some good numbers like yours

Suprdave

Its impossible to have more torque than horsepower unless you rev under 5200rpm...The Dyno was setup wrong homie...

King Tut33

Yep if the RPM is messed up there is no way to calculate torque. Go get a refund cause your torque numbers are useless.

wantboost

iTrader: (2)

the reason your torque numbers are fucked up is from all of the wheelspin and whoever was operating the dyno was dumber than ****. maybe he dicked around with the correction numbers or something

Tchleung

TQ = HP at 5225. Or somethnig very clseo to taht. so now you see why it's impossible. Then again you alreayd sad you reved to 6500 yet the dyno plot says you never reveed past 4700. so taht;s why they never overlayp. it's all messed up. Also looking at your A/F ont eh green pull. You'rerunning ridiculously lean up top and for the wheel spin he shoulda known to use 4th gear. Operator = dumbass


Modified by Tchleung at 11:27 PM 8/27/2005

abnaasefmb

TQ = HP at 5225
yeah i remember that from an auto class i took about 15 years ago. it was a waste of you time and you need to go get your money back or see if they will do it right although if they didn't have time to do it right the first time.........

Marble

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">Its impossible to have more torque than horsepower unless you rev under 5200rpm...The Dyno was setup wrong homie...</TD></TR></TABLE>

I'm sorry what are you saying here? So if someone were to rev to, let's say 6300rpm, you cannot have more torque than horsepower? Maybe for Honda motors, but before you start generalizing you might want to take a look at a 1.8T (VW) dyno...

...oh wait, here's one, mine:



However, I am not defending the LS dyno from above, as it is obvious that the dyno operator has not a clue.

Tchleung

You're TQ/HP x-overs in the wrong spot. wth :S

Fkned

Why is your tq/hp crossover at 4800 instead of 5250?

5thgen

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Marble &raquo;</TD></TR><TR><TD CLASS="quote">

I'm sorry what are you saying here? So if someone were to rev to, let's say 6300rpm, you cannot have more torque than horsepower? Maybe for Honda motors, but before you start generalizing you might want to take a look at a 1.8T (VW) dyno...

...oh wait, here's one, mine:

However, I am not defending the LS dyno from above, as it is obvious that the dyno operator has not a clue.

</TD></TR></TABLE>

Formula for HP is (torque * rpm)/5252
It is mathematically impossible to have more torque than hp after the 5252 crossover.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tchleung &raquo;</TD></TR><TR><TD CLASS="quote">You're TQ/HP x-overs in the wrong spot. wth :S</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ed’s Racing Heads &raquo;</TD></TR><TR><TD CLASS="quote">Why is your tq/hp crossover at 4800 instead of 5250?</TD></TR></TABLE>

Look at the sides of the graph, the scales are a little different.

Marble

Well here are two more, from a different dyno, same car (minus FMIC and hard pipes). Similar cross over.

Tchleung

The scales on those oens are also differnet. In order to view it right they have to be the same. If the torque scale for all of them were 25 less to make it equal. it looks like it may land in the correct spot.

Marble

And based on the above formula:

236 x 4650 / 5250 = 209

So with that, the crossover doesn't seem to have to be at 5250.

Marble

The two together aren't different, instead of rpm it shows mph. Not that hard to figure out. The first one I posted, and the first of the double pic, show rpm crossover at the same point.

5thgen

You will have the same hp and torque at 5252 rpm......its just fact. That is where the two "cross"....hence the crossover.

Your crossovers are different because your torque is on a broader scale than your HP. Check your hp and torque at 5252....they are the same.

Marble

Ok this makes a little more sense. Since my whp scale is 25-225 and my ftlbs scale is 25-250 it is causing my crossover at a different point on my dyno's.

Am I on the right track?

5thgen

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Marble &raquo;</TD></TR><TR><TD CLASS="quote">Ok this makes a little more sense. Since my whp scale is 25-225 and my ftlbs scale is 25-250 it is causing my crossover at a different point on my dyno's.

Am I on the right track?</TD></TR></TABLE>

yep

tony1

When you have the rpm setup wrong on a dynojet you will get whack numbers, sorry to burst your bubble. You didn't make that much torque...

Jockobo

that sucks...does it jack with the hp numbers though?

tony1

No, the hp numbers are correct, just not by rpm and the torque is not right.

BlackT5

I'm not sure how your gearing is, but maybe you should have dyno'd in 4th

CoreyR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">Its impossible to have more torque than horsepower unless you rev under 5200rpm...The Dyno was setup wrong homie...</TD></TR></TABLE>

you sure can make more PEAK torque than horsepower.

ScottEK

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CoreyR &raquo;</TD></TR><TR><TD CLASS="quote">you sure can make more PEAK torque than horsepower.


</TD></TR></TABLE>
And that chart you are taking numbers from before 5200 rpm, good example of why Dave is right

Jockobo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackT5 &raquo;</TD></TR><TR><TD CLASS="quote">I'm not sure how your gearing is, but maybe you should have dyno'd in 4th</TD></TR></TABLE>

i did dyno in 4th...the video was done in 3rd though...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CoreyR &raquo;</TD></TR><TR><TD CLASS="quote">

you sure can make more PEAK torque than horsepower.



</TD></TR></TABLE>

how much torque did the car really make? juss wondering where i would be at if it wasnt messed up...