Ya, know. The drivetrain loss percentage is still fairly high using this number. I get 19%, which is close to the other stock charts I've seen. I still wonder if this engine puts out 175 at the flywheel. With this loss number that puts my, non-spiked, number at 156HP or 192.7HP. redline spiked 157.7HP or 194.7HP. One other point, when the secondaries open the HP holds flat at 156 and the curve dips before they open. She also runs richer after they open. On your car the A/F line is linear and descending. Mine is basically flat from 4100 to 5300, then dips hard. Somethings up with this cars WOT program when headers and intake are attached.
On my run, the early torque numbers seem low. But, then I look at your chart and see that the stinkin pilot started my run at a later rpm. My chart starts at 2900 and then maps to yours at 3100, thus skewing my early curve numbers. I also noticed that my car runs leaner than yours and the other charts i see. I stay at 12.5 until 5400, then only fall to a 11.9 at redline. So, I guess my car has plenty of air and the headers are tuned high??
Originally posted by BIGBULS I've made the argument before that I think Specs are overrated in the Hp department.
My guess is that both the Spec and the standard SE-R make flywheel numbers in the upper 160 range to maybe 170hp..........
The torque figures look right though (180/lbft).
I think so to, because I hit 147whp w/ wai and I was thinking that should be my stock #, so i was slightly dissapointed. That is about a 16% loss. Some Z dyno #'s I saw the same day also makes me think Nissan is overstating.
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Classic-sold
03 Se-R - MIA
96 Max SE
Really, we are still talking about numbers within a 2-3% margin of error, so all this is moot. The RSX dyno's I see on AEMs website show a 16% loss. The spec dyno they have shows a 18% loss to get to 175. If you use 16%, we have 170.8HP. They have the max HP at 143.5. All this is well within a normal margin of error.
Now, the 350Z numbers are an entirely different matter!
Mine stays higher than both of yours did. After the initial fall it stays at 13, then linear decrease to 12.5 at 5400, then another dip towards 11.8 at redline. This ratio gives us an estimate of the quality of the fuel burn. Up is lean (14), down is rich (10) based upon the CO measurement at the exhaust tip.
My friend just had his vette custom tuned and the tuner tried to get the line as close to 12.5 as possible. This is the 'accepted' best fuel burn ratio for a corvette. Some things to consider when looking at it are if you are running rich, then you may not be getting enough air flow. In my case, the numbers are the leanest of the 3 specs. I have the intake and complete exhaust upgraded, so it may explain the leaner run. Now I need to verify why my car is doing that to make sure.
Quote:
Originally posted by 7SPEED pretty much 12 before and then after 5400 steady decline to 11 at fuel cut.
What about u? And if u can clarify how important the ratio is?
When the guys at speedworks hooked up the front tie down straps, they caught the active handling wire. The wire got crushed and tripped ecu alarms. He's fairly pissed about the whole issue.
**SIDE NOTE** He brought his Z06 in to 21st Century Muscle cars and had them tune the ecu maps. His first baseline run on their dyno was very close to the one at speedworks. So, this means our runs are fairly representative of actuals. The dyno at 21st Century is used by big money tuners, they are a Lingenfelter dealer. They also have a great slogan:
"Wretched Excess is Good"
Finally, to make life really suck, his final dyno number = 375WHP
That's roughly 440HP Jeez!
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