breathegood

Even with all the corrections, a S/C car dyno'd to 450rwhp at 6000' is not making anywhere near the horsepower as a car dyno'd to 450rwhp at sea level. A dyno tech at elevation can make the numbers look really good, but it's all correction algorythims. The 450whp rule of thumb is sort of a moving target depending on your location.

Turbos are a little different because the wastegate spring opens up at the same manifold pressure regardless of local barometric. No corrections are necessary.

09Stroker

Final Results

cobra443

Cant see anything!! I just got a new dyno tune on my paxton 2200 setup and with the stock pulley I am at 492rwhp/445rwtq. I looked up that power pipe setup, looks pretty good. I am trying to decide if I wanna go with that or not.

You are going to have a bad*** setup once you get down to sea level. Better be saving for that new bottom end~!

09Stroker

09Stroker

If I was going to do it again I wouldn't use the DBX meter, just get a flange and SCT MAF or one of the others. You will save a few bucks and some headaches.

Infact we had to setup the DBX to mimic the SCT 2800 anyways.

stealth_GT

you're running that much power safely?

09Stroker

I wouldn't call it safe but I haven't blown anything up yet @250 miles. I also am not driving it hard just because I want the block to last till after it snows so I can use it for my stroker build.

Riptide

Is this mainly just because the same setup will generate more boost at a lower altitude without any modifications done ot it? Or are you saying the sae corrections the dyno uses are nonsense?
Since when is 9.5 psi "well beyond" the limit of a stock motor? I can see at or near the limit but well beyond seems a bit of an overstatement.

breathegood

All else being equal, the same S/C setup will make more boost at a lower elevation, yes. I'm not saying the SAE correcations are total nonsense, but keep in mind that when you look at an SAE corrected dyno number, you are looking at a HP number that has been massaged, twice, not a direct measurement. The higher you go in elevation, the more massaging it takes. The only dyno number that is universally solid from dyno to dyno, location to location, is uncorrected torque, because that is the only direct measurement.....At 6000' it takes a lot more effort to get to the same torque level than it does at sea level.

09Stroker

It was meant to head off all the useless comments like "I hope you plan on building the motor soon" that I see pop up on other people's threads