GEN3 PPIR Testing
Posted: Mon Apr 01, 2013 3:53 pm
Another GEN3 teaser from my PPIR efi test day last Friday, PPIR is a 1 mile banked oval with a 5 turn infield for 1.3 mile lap. The infield is second & third gear, fun and flowing.
It was open test before a drivers school weekend, about 10 cars running and many people walked by a made comments…”WOW that looks much faster than normal SRF” “It sure sounds cool” one guy walked up asked “is that a super bike engine” Great fun !
I was done with my tuning for the day, there were some people there I trust to drive my car, I let 4 guys try the GEN3. Some comments were “Much better than a 1.9” “Gosh I would race a SRF now, better balance and sounds mean” “ I had to really be careful with the throttle” “Gosh the banking isn’t flat anymore, neat” These came from national level drivers that have raced or driven a 1.9 in the past.
So the teaser, 4 or 5 laps of video during my last session…I mounted the GoPro on the side pod to try a get the engine sound and not the wind noise. Listen to the throttle control or lack of a couple of times. Most of the turns are done @ 60 to 80% throttle; grip is the limiting factor not power. They have never raced PPIR backwards, but Bill Jucha and I had a very spirited battle a couple of years ago over a double national race weekend, with cool weather we lowered the old lap record by about a second to a 1:05.1 I believe.
I was told, backwards is about 1.5 seconds a lap slower. The slowest lap in the video1:04.4 and quickest was 1:03.85 on 20+ heat cycle tires. During that race weekend new tires were worth just over a second. Top end with the 1.9 was 108 to 110 MPH and the Gen3 116 to 117 MPH. The banking wasn’t easy flat anymore, a bit of a challenge really.
https://vimeo.com/63089798
Just for fun I stopped at the infield exit and made a couple of mock quarter mile acceleration runs, with lots of wheel spin, not able to use full throttle in first gear. The1325’ ended at about a forth of the way around the bank. One was 13.9 and the other 14.0. I thought that seems disappointing, until I used the standard NHRA altitude correction factor for 5400’. It comes out to about 12.85, If on a real grippy drag strip I bet there is 2 to 3 tenths to be gained, those are beginning to be pretty respectable performance numbers. Not that we want to be drag racers, just a measure that everyone understands.
If you guys don’t think this is a challenge, think again ! But it sure is Fun and that is the reason we all race a SRF !
Mike D
It was open test before a drivers school weekend, about 10 cars running and many people walked by a made comments…”WOW that looks much faster than normal SRF” “It sure sounds cool” one guy walked up asked “is that a super bike engine” Great fun !
I was done with my tuning for the day, there were some people there I trust to drive my car, I let 4 guys try the GEN3. Some comments were “Much better than a 1.9” “Gosh I would race a SRF now, better balance and sounds mean” “ I had to really be careful with the throttle” “Gosh the banking isn’t flat anymore, neat” These came from national level drivers that have raced or driven a 1.9 in the past.
So the teaser, 4 or 5 laps of video during my last session…I mounted the GoPro on the side pod to try a get the engine sound and not the wind noise. Listen to the throttle control or lack of a couple of times. Most of the turns are done @ 60 to 80% throttle; grip is the limiting factor not power. They have never raced PPIR backwards, but Bill Jucha and I had a very spirited battle a couple of years ago over a double national race weekend, with cool weather we lowered the old lap record by about a second to a 1:05.1 I believe.
I was told, backwards is about 1.5 seconds a lap slower. The slowest lap in the video1:04.4 and quickest was 1:03.85 on 20+ heat cycle tires. During that race weekend new tires were worth just over a second. Top end with the 1.9 was 108 to 110 MPH and the Gen3 116 to 117 MPH. The banking wasn’t easy flat anymore, a bit of a challenge really.
https://vimeo.com/63089798
Just for fun I stopped at the infield exit and made a couple of mock quarter mile acceleration runs, with lots of wheel spin, not able to use full throttle in first gear. The1325’ ended at about a forth of the way around the bank. One was 13.9 and the other 14.0. I thought that seems disappointing, until I used the standard NHRA altitude correction factor for 5400’. It comes out to about 12.85, If on a real grippy drag strip I bet there is 2 to 3 tenths to be gained, those are beginning to be pretty respectable performance numbers. Not that we want to be drag racers, just a measure that everyone understands.
If you guys don’t think this is a challenge, think again ! But it sure is Fun and that is the reason we all race a SRF !
Mike D