UEL PPE & Invidia
Pole Position
Joined: May 2017
Posts: 302
Likes: 63
From: PA
I think the better way to look at this (instead of peak torque and power) is the largest increase period at some point under the curve. If you were an exhaust maker, that's how it would appear in your ads 
Last edited by Apone; Oct 23, 2018 at 06:03 PM.
Pole Position
Joined: Sep 2003
Posts: 300
Likes: 36
From: Maryland
I think a big factor here is the higher octane in the earlier non-header invidia only run... 100 octane in that run will allow the computer to let way more timing happen and produce way more power. The fact that you still produced slightly more gains with the headers and HFC while being on 91 octane says a lot. If you were on 100 again for that 2nd dyno you probably would've netted another 15-20 HP/tq over the 91 fuel. You typically want to keep as many variables ruled out to show changes with power adders from dyno run to run, and octane change is a huge variable.
that AF ratio line comparison tells a lot, and with better fuel giving more timing it could have given you a lot more...
that AF ratio line comparison tells a lot, and with better fuel giving more timing it could have given you a lot more...
Lead Lap
Joined: May 2013
Posts: 588
Likes: 148
From: CA, OC
Question. I’ve got a CEL come on 3 times since I’ve had tmy headers on. I’ve only had them on for a month and a half but luckily I just clear the CEL with my OBD2 scanner. Does anyone else have any CEL issues with their PPE headers? I am running catless btw
Thread Starter
Pole Position
Joined: Apr 2012
Posts: 243
Likes: 44
From: CA
got mine installed late August and no CELs whatsoever. The guys at PPE installed the “L” adapter on my secondary O2s.
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Pole Position
Joined: Apr 2018
Posts: 272
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From: CA
More sound clips for anyone interested just trying to help people make decisions. I know it helped me with everyone’s post when I decided.
https://youtu.be/KZU5WsHO_u8
https://youtu.be/KZU5WsHO_u8
Lexus Champion
Joined: Oct 2005
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From: Calgary, AB