How to properly dyno your FD?
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How to properly dyno your FD?
Just wondering what gear should i be in on the dyno for max readings. Yesterday I did 3 runs at constant 266whp at 7500rpm. I don't have a rev limiter(I don't think) so i let off at redline everytime.
When i was done my turn on the dyno another guy said I should have been in 4th gear and floored it. It was my first time at the dyno and didn't really know. The guy operating the dyno said 3rd should be fine? Wonder if I should go back and try it in 4th and go to 8000rpm. I mean 266 at the wheels is pretty decent for a few mods. Just wondering if I could have gotta a little higher numbers with it in 4th.
When i was done my turn on the dyno another guy said I should have been in 4th gear and floored it. It was my first time at the dyno and didn't really know. The guy operating the dyno said 3rd should be fine? Wonder if I should go back and try it in 4th and go to 8000rpm. I mean 266 at the wheels is pretty decent for a few mods. Just wondering if I could have gotta a little higher numbers with it in 4th.
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The gear you're in will not change how much horsepower you have, it will only read a bit higher on your sheet. Readings on a dyno aren't really that important, especially if you're near stock. You could go to a different dyno under the same conditions and have it read higher or lower, it's just a number.
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The difference between my 2nd and 3rd gear pull
I have an automatic (4 gears) and took it to rx7.com for a dyno tune. He did most of the tuning in 2nd gear and some pulls in 3rd. There is a substantial difference in whp. He said 4th gear would be a little more hp. I've attached two pulls below:
One 2nd gear and one 3rd gear
One 2nd gear and one 3rd gear
Last edited by Hotwheelz; 07-18-10 at 01:25 PM.
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So what numbers/readings do matter on a dyno? My work put on a car show and they brought in a dyno so I figured hey when does a dyno ever show up at work. So i got my car on it. It's not so much stock, I have a redome type b ecu, trust intercooler, hks intakes, feed dp, sard mp and some sort of muffler, exedy twin plate carbon clutch kit with flywheel.
With these mods it only made like 10hp from stock seemed kinda sad. The re-mapped ecu has my boost set at 12-10-12 and i have 850cc for primary and secondary. Either way it was still a cool feeling on the dyno. Sounds amazing!
With these mods it only made like 10hp from stock seemed kinda sad. The re-mapped ecu has my boost set at 12-10-12 and i have 850cc for primary and secondary. Either way it was still a cool feeling on the dyno. Sounds amazing!
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So what numbers/readings do matter on a dyno? My work put on a car show and they brought in a dyno so I figured hey when does a dyno ever show up at work. So i got my car on it. It's not so much stock, I have a redome type b ecu, trust intercooler, hks intakes, feed dp, sard mp and some sort of muffler, exedy twin plate carbon clutch kit with flywheel.
With these mods it only made like 10hp from stock seemed kinda sad. The re-mapped ecu has my boost set at 12-10-12 and i have 850cc for primary and secondary. Either way it was still a cool feeling on the dyno. Sounds amazing!
With these mods it only made like 10hp from stock seemed kinda sad. The re-mapped ecu has my boost set at 12-10-12 and i have 850cc for primary and secondary. Either way it was still a cool feeling on the dyno. Sounds amazing!
Wheel Horse Power (WHP) is different from Motor/Flywheel Horse Power (HP/FWHP) because it takes into account power lost through the transmission.
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I have an automatic (4 gears) and took it to rx7.com for a dyno tune. He did most of the tuning in 2nd gear and some pulls in 3rd. There is a substantial difference in whp. He said 4th gear would be a little more hp. I've attached two pulls below:
One 2nd gear and one 3rd gear
One 2nd gear and one 3rd gear
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Thanks guys for the input! I would like to maybe get a PFC and get it tuned. But I've had no issues with this car with the mods I have and have been driving this as a daily for the last few years.
Well I have fixed alot of things before they turned into issues I guess. Anyway it's a blast to drive and now I know what it has for power.
Well I have fixed alot of things before they turned into issues I guess. Anyway it's a blast to drive and now I know what it has for power.
#13
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If it's running ok and the AFR's are safe I would leave the factory computer unless you really get the mod bug. As long as everything's working right it's hard to beat an OEM control unit in terms of driveability. Also remember that turbo cars are very sensitive to outside temps. Even though dynos have "correction factors" they don't really work well on turbo cars. If you look at the actual SAE standard conditions for dyno testing (PM me, I have the SAE paper) you'll see that they don't allow much deviation of coolant temps, intake temps, intercooler temps, etc.
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