Nissan 370Z Forum - View Single Post

'10Anamoly · 01-15-2012, 08:15 AM

Bingo. Yes, good gains, but you really need back to back to see what the car is actually gaining. If you notice, the first dyno pull is usually 7-8 hp lower than the last pull because the car's mapping changes a bit after a few pulls and makes more power. You can see this pretty much with any 370z on a dyno.

We know you arent trying to go crazy with numbers, just talking about accuracy. If you start with your first pull on a warm day at 275hp, add that as your first dyno line, and then add and full exhaust and record the third pull on a later day which is 30 degrees cooler with less humidity, you might show 295whp to 305whp, but part of that gain is going to be due to the atmospheric condition differences and part due to the mods and the mapping, so you dont really know exactly how much your exhaust gave you although its definitely making more power.

Just trying to help ya. Also, yes SAE and STD are just correction factor differences, neither is "the" number to use, but most people use SAE as the most realistic number. STD tends to inflate numbers a bit more and is more popular with people for that reason.

Either way, nice numbers and I'm sure you enjoy the headers!

01-15-2012, 08:15 AM	#36 (permalink)
'10Anamoly Track Member Join Date: May 2010 Location: GA Posts: 882 Drives: 2010 370Z BS M6 Rep Power: 16	Bingo. Yes, good gains, but you really need back to back to see what the car is actually gaining. If you notice, the first dyno pull is usually 7-8 hp lower than the last pull because the car's mapping changes a bit after a few pulls and makes more power. You can see this pretty much with any 370z on a dyno. We know you arent trying to go crazy with numbers, just talking about accuracy. If you start with your first pull on a warm day at 275hp, add that as your first dyno line, and then add and full exhaust and record the third pull on a later day which is 30 degrees cooler with less humidity, you might show 295whp to 305whp, but part of that gain is going to be due to the atmospheric condition differences and part due to the mods and the mapping, so you dont really know exactly how much your exhaust gave you although its definitely making more power. Just trying to help ya. Also, yes SAE and STD are just correction factor differences, neither is "the" number to use, but most people use SAE as the most realistic number. STD tends to inflate numbers a bit more and is more popular with people for that reason. Either way, nice numbers and I'm sure you enjoy the headers! __________________ 2013 Ford Mustang GT 374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd Last edited by '10Anamoly; 01-15-2012 at 08:18 AM.