Car tuning question
Thread Starter
Registered User
Joined: Jun 2009
Posts: 4,340
Likes: 0
From: Frankfort, KY
Thanks, I guess, I was embarrassed to even claim these runs, let alone post them for a you top autoxers to see. I'm sure most anyone that watched that is like "this guy is horrible." haha
No sir, unfortanatly that wasn't the case. I've got plenty of travel, like 3" front and rear. I wish the CR drove it's self. haha my ap1 was much easier to drive but once this car is figured out It should be faster then my 181k ap1.
No sir, unfortanatly that wasn't the case. I've got plenty of travel, like 3" front and rear. I wish the CR drove it's self. haha my ap1 was much easier to drive but once this car is figured out It should be faster then my 181k ap1.
Registered User
Joined: Jun 2007
Posts: 626
Likes: 0
From: Winnipeg, MB, Canada
Did your tune do something to affect the throttle tables? It looks like you're having a hard time applying just a bit of throttle. i.e. There's no 20% throttle application, it's either 0% or 40%. Maybe that's the driver... 
Some of the BMWs I've driven have a 'sports throttle' mode that makes the throttle highly non-linear (it feels like 20% pedal movement = 50% throttle movement), my runs end up looking like that until I turn that crap off. 
Someone here referred me to the Smithees/Neil Roberts article some time ago: http://www.ozebiz.com.au/racetech/th...hocktune1.html
While there was some good info there, I found it impossibly disorganized for planning a quick adjustment. I rewrote all the points in what I thought was a more logical order and made a quick reference chart:
Hope it helps someone! I'm just starting to scratch the surface so I can't say for certain that it's perfect.
Some of the BMWs I've driven have a 'sports throttle' mode that makes the throttle highly non-linear (it feels like 20% pedal movement = 50% throttle movement), my runs end up looking like that until I turn that crap off. While there was some good info there, I found it impossibly disorganized for planning a quick adjustment. I rewrote all the points in what I thought was a more logical order and made a quick reference chart:
Hope it helps someone! I'm just starting to scratch the surface so I can't say for certain that it's perfect.
Registered User
Joined: Jul 2006
Posts: 635
Likes: 0
Check out Page 5 of this .pdf
it's not the same as what Lugod posted from the BMW forums.
http://www.fordracingparts.com/musta..._FR500S_v1.pdf
it's not the same as what Lugod posted from the BMW forums.
http://www.fordracingparts.com/musta..._FR500S_v1.pdf
Joined: May 2006
Posts: 299
Likes: 0
You are VERY aggressive with your throttle input sometimes. 
I would focus on being delicate and managing your feed-in of throttle instead of treating it like an on/off switch sometimes. You do have some good moments though, keep it up. Also, I see you are REALLY aggressive on your steering input sometimes, tending to overdrive the front, requiring you to set the car up to be a little looser than is optimal in order to combat the understeer. We are getting in to a driver-specific setup quandry at that point though, so it's up to you what you want to focus on.
I would focus on being delicate and managing your feed-in of throttle instead of treating it like an on/off switch sometimes. You do have some good moments though, keep it up. Also, I see you are REALLY aggressive on your steering input sometimes, tending to overdrive the front, requiring you to set the car up to be a little looser than is optimal in order to combat the understeer. We are getting in to a driver-specific setup quandry at that point though, so it's up to you what you want to focus on.
Thread Starter
Registered User
Joined: Jun 2009
Posts: 4,340
Likes: 0
From: Frankfort, KY
Thanks for the input, I'll check out the charts tomorrow!
for reference this is me driving my AP1, alot more dialed in!
https://vimeo.com/43781827
for reference this is me driving my AP1, alot more dialed in!
https://vimeo.com/43781827
Joined: Aug 2010
Posts: 2,439
Likes: 9
From: Toronto
Did your tune do something to affect the throttle tables? It looks like you're having a hard time applying just a bit of throttle. i.e. There's no 20% throttle application, it's either 0% or 40%. Maybe that's the driver... Some of the BMWs I've driven have a 'sports throttle' mode that makes the throttle highly non-linear (it feels like 20% pedal movement = 50% throttle movement), my runs end up looking like that until I turn that crap off.
Someone here referred me to the Smithees/Neil Roberts article some time ago: http://www.ozebiz.com.au/racetech/th...hocktune1.html
While there was some good info there, I found it impossibly disorganized for planning a quick adjustment. I rewrote all the points in what I thought was a more logical order and made a quick reference chart:
Hope it helps someone! I'm just starting to scratch the surface so I can't say for certain that it's perfect.
Some of the BMWs I've driven have a 'sports throttle' mode that makes the throttle highly non-linear (it feels like 20% pedal movement = 50% throttle movement), my runs end up looking like that until I turn that crap off.
Originally Posted by josh7owens' timestamp='1369012583' post='22553530
I wish we had a good write up that states "this changes does this, and this change does that"
While there was some good info there, I found it impossibly disorganized for planning a quick adjustment. I rewrote all the points in what I thought was a more logical order and made a quick reference chart:
Hope it helps someone! I'm just starting to scratch the surface so I can't say for certain that it's perfect.
