andre12031948

First I'd like to thank all the shops that offered to tune my car. Thank you.
I ended up going to my original tuner, Performance Motorsport from L.I.
I went back to them because they gave me an exellent tune 3 years ago, they could access my computer & I like to stay loyal to shops that do good work, charge fair prices & treat customers/me well

Now to the tune.
A modest 4 H.P. gain but I am happy because it backed up that I was truly running with a great tune all these years.

The dyno was a Mustang dyno.
I got the H.P. then the corrected H.P.
Usually the corrected H.P. is higher.
In my case, it was the opposite. I thought I fully understood all of that before the tune, but I wouldn't mind some input from you guys in this area (corrected H.P.).

My car produced 310whp & 265tq. but after the correction it was calculated to 294whp. with 248tq.

Comments????

kacz07

iTrader: (15)

Mods? Seems high, if you don't have cams, long tubes, some sort of MAF and TB mods, but nice numbers.

andre12031948

I thought everybody knew my mods by now

test pipes, alum. fly wheel, ACT street clutch, 4:08 gears, alum. crank pulley.
I think that's it.

and a very good tune?

andre12031948

That H.P. is about right to produce my et & mph times.

2004Black350z

iTrader: (37)

Numbers are a little high

Congrats nonetheless

andre12031948

Thanks but I'm not into dyno competition. I go on a dyno to check the car after some changes.

After my car got fixed from being flooded, I wanted to make sure the car was fit for drag racing at that Atco meet. It produced 305 uncorrected whp at a different shop, but it was much warmer then. So 310whp today sounds about right. Also I had the highest h.p reading there & at Performance one HR car that was more modded had higher H.P.

The reason I posted is because I thought I understood corrected H.P. etc, etc. Now I'm not that sure??? Comments about that anyone.

andre12031948

The way I understood corrected H.P. was that when someone had their car dynoed on a 90 degree/humid day, the dyno adjusted/corrected the results to ideal conditions & as a result the corrected H.P. was higher.

Now my actual H.P. done at 48 degrees was lowered. So is it adjusted to ideal conditions or average conditions? With all the dyno threads posted here, someone has to know
Thanks

binder

iTrader: (8)

Corrected is a more accurate number. You can use STD or SAE correction. Uncorrected is bogus because it will read higher when cold. Also it varies with barometric pressure. Uncorrected a 250hp car might look more like a 300hp car if it was at high elevation. Now when corrected it brings it back down to what it will actually produce.

Uncorrected is set to give the power if there were standard atmospheric conditions pre-determined in the dyno. If the atmospheric conditions vary from that in any way then the numbers need to be adjusted to give the true output.

andre12031948

Yes, the corrected H.P. was STD. Which by the way I don't know what that stands for

I don't seem to understand how an UNCORRECTED car will show 300hp or X amount MORE H.P. at higher elevation. If I define the word corrected, I just don't get it

andre12031948

yI'm a guy that understands sun spots, black holes & kinda the theory of relativity, BUT I just don't get this.

Wouldn't a car at high elevation produce LOWER REAL H.P? (because of thin air/oxygen) therefore it would need to be corrected, hence H.P. raised??? HELP

Bmurray350z

iTrader: (34)

294/248 seems more like it with those mods.

cool

andre12031948

Thanks, but still doesn't answer my question/understanding. I know it has to be me. I know there's people here that understand this. I'm in no hurry, so today, tomorrow or even next week, I'll understand it I'm sure.

red roadster

Check out this link maybe it will help.

http://www.land-and-sea.com/dyno-tec...horsepower.htm

andre12031948

I just read the FIRST paragraph only and it confirms MY understanding. What now??? Am I right??? Do I need to read the whole article?

It says exactly what I said about elevation/lack of oxygen, therefore it needs to be corrected, hence raised....

andre12031948

I sat by the screen on all the runs, as they were done. After each run, it showed the whp of my car. Not sure if the word REAL h.p. was used, but it was clear that that was the H.P. Then a couple of minutes later, the corrected H.P. came on the screen.

SO, did my car produce 310 h.p. in that 48 degree temp. room, then corrected to average conditions?

All my lowest E.T's were in cooler temperature days. Early Spring & late Fall. So logic tells me that in those conditions I made more H.P.

Similiar condition as the day of my Dyno test...

red roadster

Maybe try reading more than the first paragraph for a better understanding, thats just me, but I don't understand black holes either, lol.

andre12031948

I DO understand black holes. I also appriciate your advice, but I have a problem reading very long writtings & will do so only if the poster of that article or someone else who read it says I should. The first paraghraph was very clear & is enough for me, for now.

binder

iTrader: (8)

In high elevation uncorrected will read higher than actual. That's how the guy with a single walbro 255 posted over 600hp uncorrected. His corrected would be down at 500hp or maybe less since every walbro runs out below 550 and most run out closer to 500.

andre12031948

I got distracted during the reading of your post. You are the one that posted that article. So I want to opologize & try to read it soon.
thanks

andre12031948

I'm sorry but all I get from your post is a post about a single walbro something or other.

If a car turns x in the 1/4 mile at 5,000 ft above sea level, than at sea level it would turn a quicker et than the x at 5k feet.
So if at 5,000 feet above sea level a car produced 250h.p., at sea level it has to be higher. So when the car produces 250h.p at 5k, the corrected h.p should be higher. Why can't I see this any different that I see it????
What's wrong with me ????
HELP!!!