Redfox340 Posted May 22, 2003 Report Posted May 22, 2003 Has anyone ever (recently or whenever) dynoed their DOHC lately? What were the numbers? And with modifications? I'm curious since I just recieved a G-Tech meter and was going to make a couple runs tonight... Thanks! - RedFox340 Quote
Redfox340 Posted May 23, 2003 Author Report Posted May 23, 2003 Well... my car is out-of-date and out-of-shape according to the G-Tech. After two solid runs I mustered a full 141 horsepower. That sucks... I know. * Tempreture: 75 degrees * Altitude: 5300 feet * Mileage: 174,600 miles * Modifications: K&N drop-in filter - RedFox340 Quote
Robby1870 Posted May 23, 2003 Report Posted May 23, 2003 well does the G-tech tak in to account altitude? Cuz if not, that would explain your low reading. Also, does it mean HP at the wheels or crank? Robby Quote
Redfox340 Posted May 23, 2003 Author Report Posted May 23, 2003 well does the G-tech tak in to account altitude? Cuz if not, that would explain your low reading. Also, does it mean HP at the wheels or crank? No, altitude doesn't make a difference for the reading. It uses numerical integration of acceleration over a period of time when you hit the gas. It's quite a cool little toy. The maximum horsepower is shown after the run and that's what you're putting down to the pavement (aka: wheel HP). Now, you'll get different readings due to head or tail winds so with that in mind, I wanted to test on a clear night... which I did. However these are my first two runs ever with this thing, and I want to make more concise measurements, since set-up is crutial part of this tool's accuracy. I'm still reading the owners manual to learn the other functions... - RedFox340 Quote
89oldscutlass Posted May 25, 2003 Report Posted May 25, 2003 I know on the old gm cars the hp rating was at the engine not what hp made it to the pavement but I thought on all the late 80s and new cars they were rated at the wheels.I was going to check my little 2.8 but im afraid i wont get a hp rate just a light flashing briggs and stratten. Quote
Robby1870 Posted May 25, 2003 Report Posted May 25, 2003 I know on the old gm cars the hp rating was at the engine not what hp made it to the pavement but I thought on all the late 80s and new cars they were rated at the wheels.I was going to check my little 2.8 but im afraid i wont get a hp rate just a light flashing briggs and stratten. Briggs and Stratton...... No, GM cars still measure the power at the crank, not the wheels Robby Quote
Lee Posted May 26, 2003 Report Posted May 26, 2003 Someone on EFI had a best dyno of 173 at the wheels (Z34). It had some toys added. Quote
timg Posted May 27, 2003 Report Posted May 27, 2003 I posted a reply on efi about this. I had 179.3 hp at the wheels with intake and exhaust. You're down on power because of altitude. The G-Tech does not account for altitude- every dyno gives altitude and temp corrected numbers. Tim Quote
Robby1870 Posted May 27, 2003 Report Posted May 27, 2003 Thats what I figured. That thin air is just not good for a motor Robby Quote
Redfox340 Posted May 27, 2003 Author Report Posted May 27, 2003 You're down on power because of altitude. The G-Tech does not account for altitude- every dyno gives altitude and temp corrected numbers. But with correct weight input and a clean solid run, shouldn't it be the same or close to a real dyno? A dyno, like the G-Tech measure what you're slapping to the pavement in power, correct? If altitude was a conturbuting factor on computing such numbers, would you think it would be explained on the company's website? Just trying to think this out... - RedFox340 Quote
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