2012 PGP Lapping Days
Joined: Mar 2002
Posts: 588
Likes: 7
From: Bellingham
FYI, the supercharger issues I was having at the last lapping day turned out to be a damaged high flow cat. The cat was essentially blocked which caused compressor surge during acceleration because the BOV was closed as it normally should be under acceleration. The damaged cat also explains the lack of hp when I bypassed the SC. Datalogs indicated a max NA HP of ~110 based on acceleration/gear/aero drag etc.
Some other interesting data while looking at datalogs:
Lap Time: 1:10.3XX sec
Total time spent at WOT: 6.390 seconds (~9% of laptime)
WOT = TPS @ 98% or higher
There were 4 places on the track at full throttle
A car with less power would obviously spend more time at WOT
Time on track less than WOT = 91%
Time less than 75% TPS = ~87%
Time less than 50% TPS = ~65%
BTW, nice to see some new faces and old faces. S2000's were well represented.
Good times.
Some other interesting data while looking at datalogs:
Lap Time: 1:10.3XX sec
Total time spent at WOT: 6.390 seconds (~9% of laptime)
WOT = TPS @ 98% or higher
There were 4 places on the track at full throttle
A car with less power would obviously spend more time at WOT
Time on track less than WOT = 91%
Time less than 75% TPS = ~87%
Time less than 50% TPS = ~65%
BTW, nice to see some new faces and old faces. S2000's were well represented.
Good times.
Registered User
Joined: Oct 2008
Posts: 2,781
Likes: 1
From: So Cal
^ That is funny, because looking at the track, there are at least 9 places where I would be WOT. And is that 1:10.3 with the SC bypassed and only having ~110-120WHP? If so I am going to go home and cry... Well since I am at home, I will just curl into a ball and weep softly. 
Registered User
Joined: Oct 2008
Posts: 2,781
Likes: 1
From: So Cal
^Right, but he said that he was having other issues that were limiting him to somewhere around 110hp. (according to his data logger) Believe me, I know that the s2k's have double the power to play with that I have. You guys are hitting 70-75 on the main straight where I struggle to hit 65. But don't worry, I'll make up your 1-2 second advantage on the straight bits in the corners. It seems that at PGP, overall dimensions have as much to do with speed as anything else.
Registered User
Joined: Oct 2008
Posts: 2,781
Likes: 1
From: So Cal
The 1:10.3 lap was with fully functioning SC and tired R888's. My 110 hp lap times were in the 1:15-1:16 range - with the car sputtering and running like crap. It was still fun.