OS Giken STU FRC Corvette Build Thread - Road to Lincoln 2015
07-27-2015, 09:47 PM
#161
Racer
Are you willing to talk about your tire strategy for Nationals? I had some trouble with the RE-71Rs overheating with a co-driver on a 60s course in 85F ambient. So, I was wondering if you had any tips for running closer to optimal tire conditions for Nationals aside from cutting off the OPR and spraying them down with water. And I'm not ashamed to ask this newb question since I'm going to my first national championship this year... but why is it the car owner or decided *fast guy* who runs as the second driver in a given car? Thanks in advance for any tips and tricks you care to share.
07-28-2015, 03:34 PM
#162
Maybe I missed it somewhere in the post, but I wanted to ask if you made a switch to a lightweight battery?
It seems there's a potential for about 20lbs weight savings. I know it's not much, but every little bit counts, right?
It seems there's a potential for about 20lbs weight savings. I know it's not much, but every little bit counts, right?
07-29-2015, 02:18 PM
#166
Intermediate
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Are you willing to talk about your tire strategy for Nationals? I had some trouble with the RE-71Rs overheating with a co-driver on a 60s course in 85F ambient. So, I was wondering if you had any tips for running closer to optimal tire conditions for Nationals aside from cutting off the OPR and spraying them down with water. And I'm not ashamed to ask this newb question since I'm going to my first national championship this year... but why is it the car owner or decided *fast guy* who runs as the second driver in a given car? Thanks in advance for any tips and tricks you care to share.
Also make sure that your setup isn't overheating one axle pair over the other. On our Vette, all 4 tires come up to temp equally for the most part. If your front tires come up to temp faster than the rear, chances are your setup is highly understeer biased. If your rear heats much faster than the fronts than it is oversteer biased.
07-29-2015, 02:21 PM
#167
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We actually have an Optima Red battery in the car. It came with it when we bought it and it was relatively new. I've had nothing but trouble with lightweight batteries and just didn't care to venture that route again. I suspect the battery weighs somewhere between 30-40lbs. The corner weights are all good so i'm not too worried about it.
07-29-2015, 02:24 PM
#168
Supporting Vendor
Just remember that the front tires are blasted with heat from the engine and cooling fans too. So I'd not 100% say if your fronts are hotter the car is biased to push. There is a whole lotta heat coming off the front between fans and the headers too.
07-29-2015, 02:29 PM
#169
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True, I evaluate based on skidpad so heat generated by engine and brakes is significantly less when picking up temp via tire temp probe.
07-29-2015, 02:47 PM
#170
Racer
Nothing I haven't done already with my co-driver. Typical run 1st runs, then maybe spray after that or 2nd runs.
Also make sure that your setup isn't overheating one axle pair over the other. On our Vette, all 4 tires come up to temp equally for the most part. If your front tires come up to temp faster than the rear, chances are your setup is highly understeer biased. If your rear heats much faster than the fronts than it is oversteer biased.
Also make sure that your setup isn't overheating one axle pair over the other. On our Vette, all 4 tires come up to temp equally for the most part. If your front tires come up to temp faster than the rear, chances are your setup is highly understeer biased. If your rear heats much faster than the fronts than it is oversteer biased.
My front tires do seem to heat up more than the rears. But aside from the differential (which of course is no small thing to overlook in terms of balance), I came to a similar final setup to yours in terms of springs and swaybars which you can see in my build thread. I have a bit more front spring and a bit less front bar adjustment. Seems to be very balanced to me though in terms of handling performance. Part of the heat issue is the radiator fans blowing hot air on the front tires. I'll typically spray fronts, rears, then fronts again due to that. I've run a more oversteer prone setup in the past and I can't drive the car straight. Anyway, rock on.
07-29-2015, 03:20 PM
#171
Drifting
07-30-2015, 07:58 PM
#172
Racer
08-07-2015, 08:51 AM
#173
Racer
Mr. Lugod looks like the lone wolf Corvette in STU for the Pro Finale. Surely will represent. Kriz cracks off 1.6s 60' times whether it's wet or dry, so it will be fun to see how this plays out.
10-02-2015, 01:25 PM
#175
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Solo Nationals and ProFinale
Latergram post for Solo Nationals.
Unfortunately due to some uncontrollable circumstances I was left a single driver for both ProFinale and Solo Nationals.
ProSolo went off fine. There was some minor understeer that I was fighting during both days of ProSolo. I didn't pick up the fact that I was running too much front rebound. By the time I did, it was too late. Ended up last in a class of 5 with the margin from first to fifth being less than half a second. I ended up 2nd in Overall Year End Points for STU.
Solo Nationals Day 1
After ProSolo I reduced the front rebound and hit the test n tune course to verify some car behavior changes. Sure enough, less rebound and the car was turning really well. On Day 1 East course i found exactly how much better the car turned.... way too much.
First runs were the loosest the car had ever felt. I knew this going into the first turn as it was a drift fest. Even though I dialed down my aggression throughout the run, I knew there was something very wrong. One thing I noticed was that the car had way more front grip than it ever had. One Run 2 I desperately set the car back to the ProSolo setting. This run although better had a ton of entry push (rebound). During this run I knew it was not the fast way to go and driving around it would not get me the times that I needed.
After assessing the results of run 1 and 2, I decided to go to full stiff on the front swaybar and dial back the rebound. This change was perfect and wish I had ran this since day one. In fact this was the setup I've been running all year long back home at El Toro and Crow's Landing. Some foolish changes were made the event prior to Nationals that probably should of never happened.
On my third run, I just couldnt get back on pace. Even though the car felt great, I just couldn't muster the confidence I once had before run 1. The loose car really messed me up mentally. Unfortunately I did not have video for Day 1.
Day 2
With the car working well at the tail end of Day 1, I was confident in coming back hard for Day 2. All three runs the car worked great and I was able to charge hard on the more difficult / tighter course. In the end I set fastest clean time on the West Course and put myself within half a second of the win. Had the car handled the same way on Day one, I'm pretty confident the car would have won. But its always a game of woulda coulda shoulda right?
Back Home
Its been nearly 3 weeks from Nationals and the car works great back home. Took the win over Jeff Stuart by a little over a tenth and put myself back into contention for the year end regional championship (accidentally left the line with TC on!!!) . We've been going back and forth all year and will value this year end battle more than what happened at Nationals just due to the fact that we both were developing cars and the competition between us doesn't stop at just one event
The car will officially be for sale after SEMA 2015. If you are in the Las Vegas area during SEMA you could come check out the car! It will be a featured vehicle amongst other show cars. Will likely not win any show car prizes but at least it does help exposure for all our sponsors.
Unfortunately due to some uncontrollable circumstances I was left a single driver for both ProFinale and Solo Nationals.
ProSolo went off fine. There was some minor understeer that I was fighting during both days of ProSolo. I didn't pick up the fact that I was running too much front rebound. By the time I did, it was too late. Ended up last in a class of 5 with the margin from first to fifth being less than half a second. I ended up 2nd in Overall Year End Points for STU.
Solo Nationals Day 1
After ProSolo I reduced the front rebound and hit the test n tune course to verify some car behavior changes. Sure enough, less rebound and the car was turning really well. On Day 1 East course i found exactly how much better the car turned.... way too much.
First runs were the loosest the car had ever felt. I knew this going into the first turn as it was a drift fest. Even though I dialed down my aggression throughout the run, I knew there was something very wrong. One thing I noticed was that the car had way more front grip than it ever had. One Run 2 I desperately set the car back to the ProSolo setting. This run although better had a ton of entry push (rebound). During this run I knew it was not the fast way to go and driving around it would not get me the times that I needed.
After assessing the results of run 1 and 2, I decided to go to full stiff on the front swaybar and dial back the rebound. This change was perfect and wish I had ran this since day one. In fact this was the setup I've been running all year long back home at El Toro and Crow's Landing. Some foolish changes were made the event prior to Nationals that probably should of never happened.
On my third run, I just couldnt get back on pace. Even though the car felt great, I just couldn't muster the confidence I once had before run 1. The loose car really messed me up mentally. Unfortunately I did not have video for Day 1.
Day 2
With the car working well at the tail end of Day 1, I was confident in coming back hard for Day 2. All three runs the car worked great and I was able to charge hard on the more difficult / tighter course. In the end I set fastest clean time on the West Course and put myself within half a second of the win. Had the car handled the same way on Day one, I'm pretty confident the car would have won. But its always a game of woulda coulda shoulda right?
Back Home
Its been nearly 3 weeks from Nationals and the car works great back home. Took the win over Jeff Stuart by a little over a tenth and put myself back into contention for the year end regional championship (accidentally left the line with TC on!!!) . We've been going back and forth all year and will value this year end battle more than what happened at Nationals just due to the fact that we both were developing cars and the competition between us doesn't stop at just one event
The car will officially be for sale after SEMA 2015. If you are in the Las Vegas area during SEMA you could come check out the car! It will be a featured vehicle amongst other show cars. Will likely not win any show car prizes but at least it does help exposure for all our sponsors.
Last edited by jonlugod; 10-02-2015 at 01:28 PM.
10-06-2015, 09:03 AM
#176
Racer
Latergram post for Solo Nationals.
Unfortunately due to some uncontrollable circumstances I was left a single driver for both ProFinale and Solo Nationals.
ProSolo went off fine. There was some minor understeer that I was fighting during both days of ProSolo. I didn't pick up the fact that I was running too much front rebound. By the time I did, it was too late. Ended up last in a class of 5 with the margin from first to fifth being less than half a second. I ended up 2nd in Overall Year End Points for STU.
Solo Nationals Day 1
After ProSolo I reduced the front rebound and hit the test n tune course to verify some car behavior changes. Sure enough, less rebound and the car was turning really well. On Day 1 East course i found exactly how much better the car turned.... way too much.
First runs were the loosest the car had ever felt. I knew this going into the first turn as it was a drift fest. Even though I dialed down my aggression throughout the run, I knew there was something very wrong. One thing I noticed was that the car had way more front grip than it ever had. One Run 2 I desperately set the car back to the ProSolo setting. This run although better had a ton of entry push (rebound). During this run I knew it was not the fast way to go and driving around it would not get me the times that I needed.
After assessing the results of run 1 and 2, I decided to go to full stiff on the front swaybar and dial back the rebound. This change was perfect and wish I had ran this since day one. In fact this was the setup I've been running all year long back home at El Toro and Crow's Landing. Some foolish changes were made the event prior to Nationals that probably should of never happened.
On my third run, I just couldnt get back on pace. Even though the car felt great, I just couldn't muster the confidence I once had before run 1. The loose car really messed me up mentally. Unfortunately I did not have video for Day 1.
Day 2
With the car working well at the tail end of Day 1, I was confident in coming back hard for Day 2. All three runs the car worked great and I was able to charge hard on the more difficult / tighter course. In the end I set fastest clean time on the West Course and put myself within half a second of the win. Had the car handled the same way on Day one, I'm pretty confident the car would have won. But its always a game of woulda coulda shoulda right?
https://www.youtube.com/watch?v=YeJlSCUfOP8
Back Home
Its been nearly 3 weeks from Nationals and the car works great back home. Took the win over Jeff Stuart by a little over a tenth and put myself back into contention for the year end regional championship (accidentally left the line with TC on!!!) . We've been going back and forth all year and will value this year end battle more than what happened at Nationals just due to the fact that we both were developing cars and the competition between us doesn't stop at just one event
https://www.youtube.com/watch?v=4WHrqeTzpzI
The car will officially be for sale after SEMA 2015. If you are in the Las Vegas area during SEMA you could come check out the car! It will be a featured vehicle amongst other show cars. Will likely not win any show car prizes but at least it does help exposure for all our sponsors.
Unfortunately due to some uncontrollable circumstances I was left a single driver for both ProFinale and Solo Nationals.
ProSolo went off fine. There was some minor understeer that I was fighting during both days of ProSolo. I didn't pick up the fact that I was running too much front rebound. By the time I did, it was too late. Ended up last in a class of 5 with the margin from first to fifth being less than half a second. I ended up 2nd in Overall Year End Points for STU.
Solo Nationals Day 1
After ProSolo I reduced the front rebound and hit the test n tune course to verify some car behavior changes. Sure enough, less rebound and the car was turning really well. On Day 1 East course i found exactly how much better the car turned.... way too much.
First runs were the loosest the car had ever felt. I knew this going into the first turn as it was a drift fest. Even though I dialed down my aggression throughout the run, I knew there was something very wrong. One thing I noticed was that the car had way more front grip than it ever had. One Run 2 I desperately set the car back to the ProSolo setting. This run although better had a ton of entry push (rebound). During this run I knew it was not the fast way to go and driving around it would not get me the times that I needed.
After assessing the results of run 1 and 2, I decided to go to full stiff on the front swaybar and dial back the rebound. This change was perfect and wish I had ran this since day one. In fact this was the setup I've been running all year long back home at El Toro and Crow's Landing. Some foolish changes were made the event prior to Nationals that probably should of never happened.
On my third run, I just couldnt get back on pace. Even though the car felt great, I just couldn't muster the confidence I once had before run 1. The loose car really messed me up mentally. Unfortunately I did not have video for Day 1.
Day 2
With the car working well at the tail end of Day 1, I was confident in coming back hard for Day 2. All three runs the car worked great and I was able to charge hard on the more difficult / tighter course. In the end I set fastest clean time on the West Course and put myself within half a second of the win. Had the car handled the same way on Day one, I'm pretty confident the car would have won. But its always a game of woulda coulda shoulda right?
https://www.youtube.com/watch?v=YeJlSCUfOP8
Back Home
Its been nearly 3 weeks from Nationals and the car works great back home. Took the win over Jeff Stuart by a little over a tenth and put myself back into contention for the year end regional championship (accidentally left the line with TC on!!!) . We've been going back and forth all year and will value this year end battle more than what happened at Nationals just due to the fact that we both were developing cars and the competition between us doesn't stop at just one event
https://www.youtube.com/watch?v=4WHrqeTzpzI
The car will officially be for sale after SEMA 2015. If you are in the Las Vegas area during SEMA you could come check out the car! It will be a featured vehicle amongst other show cars. Will likely not win any show car prizes but at least it does help exposure for all our sponsors.
Will a part-out thread hit the autocross classifieds here assuming the car doesn't sell as a whole?
10-06-2015, 02:21 PM
#177
Advanced
Thread Starter
What parts were you interested in?
