March 16, 2025, 02:30:37 PM

Author Topic: LOF's LS1 FC track car build  (Read 316090 times)

Offline wickedrx7

Re: LOF's LS1 FC track car build
« Reply #1110 on: May 15, 2017, 11:02:49 PM »
That looks great!

1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1111 on: May 16, 2017, 12:54:51 AM »
Below is one of the quicker laps of the day. The car is working really well. The re valved rear shocks are much better. I cant believe the improvement in stability over bumps. I think I will stick with the rear springs I have on it.


http://youtu.be/uu4cgN3v2t8
Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline scuter83

Re: LOF's LS1 FC track car build
« Reply #1112 on: May 16, 2017, 08:45:06 AM »
Video doesn't work for me....

Offline FC3S Murray

Re: LOF's LS1 FC track car build
« Reply #1113 on: May 16, 2017, 09:46:24 AM »
That is great pic Ash! Nothing like a combo of torque & lateral G's!



13 years of abuse and still running STRONG!

SRM Performance Tuning LLC
https://www.instagram.com/fc3s_murray/?hl=en

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1114 on: May 16, 2017, 11:09:26 AM »
Video should work now
Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline frijolee

Re: LOF's LS1 FC track car build
« Reply #1115 on: May 16, 2017, 12:14:41 PM »
Great pic Ash!  You need to print that biggie size and frame it for the garage.

I also dig the new video format with time and mph.  It's a lot easier for me to watch your throttle and braking with mph front and center.  This approach gives you a much more concrete comparison to Billy Johnson's take on a fast lap. 

http://www.motoiq.com/MagazineArticles/ID/1387/Fast-Lap-With-Billy-Johnson--Auto-Club-Speedway-Roval-Video-Inside.aspx

I'm sure you've seen this before but a few specific things stood out to me in checking out your lap.  Thought some commentary might be helpful in your never ending quest for speed.  (Note to self:  I have to stop trying to build speed, you do way better than me at focusing on the driver mod and dialing in what you have.)  Anyways, my thoughts on your lap above.



-There's some variation in your entry speed to turn 1 (big bank).  The fast lap was 148 but the one following was 151...  Do you have a concrete braking point for the turn 1 entry?  My impression in riding with you (and some driving it too) is that a lot of it happens by feel but you're moving fast enough it might be worth trying to dial that in.  Obviously the exit from turns 15-17 is all important in average speed on the front straight.

-Have you found your limit on the bank?  It was interesting that your slowest point on the bank was that which Billy J refers to as mid corner.   Not worth risking the car, but I think an intentional speed check to see if you can creep that up a few more mph would be help your lap time.  Your speeds on the lap above varied by 5 mph or so.

-Exit of corner 2.  This is probably the biggest obvious change I recommend.  There's a significant straight (and/or banked lead out) here where you didn't accelerate at all...  I know some of it's a mental game after the butt clench of the bank but I agree with Billy J's assessment:  it's time to get back on full throttle at about 3/4 bank, let the car run out toward the wall and stay hard on it until a distinct braking point (which in your car I think will likely be relative to that big hole in the wall).  Short version, you can do a lot more using the after bank straight away.

-Mid track battle stuff.  You're pretty solid through here.  I'm sure there's always optimizing to do and I'm glad to hear the shock valving helped so much.  I like your line through 5.  In re-reading Billy's commentary, there's some interested advise about throttle management to help keep the car settled.  IE see his notes about turn in on throttle for turn 6 and snapping off for turn 12.

-There might be a little time to be had exiting Turn 8, but I think you're pretty good here.  You might want to double check speeds and see how consistent you are.  It's obviously an important corner.

-15, 16, 17.  I can't even believe he's describing full throttle through ALL of these, but it you can figure out how, the upside on lap times could be huge.  I think it might be interesting to find and keep backing up the point at which you are going full throttle.  See what that does to your exit speeds.  We've talked a few times about the outside line, but I know it's bumpy and has plenty of trade offs.

Anyways, that's what I have.  Much love for you brother!  You're ripping out there.  Hope the thoughts help.
-Joel

PS With as fast as you're moving is it time for a HANS device and/or suit?
« Last Edit: May 16, 2017, 12:22:25 PM by frijolee »
LS2 stroker FC, Mandeville big brakes, widebody, etc
Build thread:  http://www.norotors.com/index.php?topic=1274.0
www.roninspeedworks.com

LargeOrangeFont says: "Joel is right, and I love Joel. But his car sounds like the wrath of God."   ;)

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1116 on: May 16, 2017, 02:15:28 PM »
Thanks Joel.

Honestly I ran better laps in the morning. The problem was they had turn 9 and 10 pinched down with a series of cones, and 15-17 were pinched down with a series of cones limiting both entry speed into 15 and exit speed out onto the banking. After lunch they rearranged the cones to what they are in the video. I was running nearly equal times in the morning, with the slower turns. Those laps would have easily been the fastest I've ever ran there.

In the same session I did a rolling lap of 1:54.6. Rolling lap meaning an entire lap, but with the finish line in a different spot. This is a helpful number when there is traffic and a slower car may show you down for part of a lap. My best rolling lap of the day was a 1:53.8. 

Yes, the whole line through 1 and 2 is a bit inconsistent, and that really starts in turns 15-17 which I will address later. There are generally traffic will determine a line for me going through the banking. I will start off by saying I don't yet really know which line is best through there. I don't think I have enough data and don't know the grip limit. I can watch the lap timer and it will tell me if a particular line is faster via the predictive lap time, I've hugged the inside line, and ran up through mid track. Mid track feels better, but the inside line is shorter, and I can hold similar speed going on the inside line. Logically this seems like what I should do if I am able.

No I have not found the limit of speed through 1 and 2. I know I can stay above 120 through the entire bank on a good day when it is not windy, however I don't always do that because of traffic, or to give the car or myself a bit of a break.

I let off/brake for turn 1 in a what is probably a 300 foot window at ~150MPH. My speed at entry there is really determined by my exit speed at turn 17. If I have to wait on a car in turns 15-17, that will lower entry speed into 1. Because those slower cars held me up, I was slower through 15-17 and onto the front straight.

If I had to pick a place to work on it would be from turn 2 to turn 3. The problem here is I have no ABS, so it is always a gamble between speed and hitting my marks, because if you blow turn 3, the lap is shot, and you can easily flat spot a tire, which will end the day. I am always pretty conservative here.

With aero I can get faster through 6. On a real hot lap I am on the gas between 6 and 7, and on the gas again between the exit of 7 and the braking point for 8. Once I hit the curb on 7 and I'm sure the car got on 2 wheels because it literally lifted the right side of the car and it slid across the track at 90 MPH or so. The car "landed" at the outer edge of the track but I kept going.

No way can I do full throttle through 15-17, but i do try to get through there as quick as possible, by driving a line through some of the bumps. This was a little hairy before with the old rear shock setup. It is much more stable now. Aero will help here but the track is much bumpier in that area than it used to be. There are also barriers there that can tear up your car if you lose it at the wrong place.

Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline eage8

Re: LOF's LS1 FC track car build
« Reply #1117 on: May 16, 2017, 10:30:58 PM »
Don't take this the wrong way... but your hand position drives me crazy :)

There is a lot to be said about the car turning the same amount when your hands are in a certain place.  I think it makes things a lot easier and consistent, especially reacting to what the car is doing.  Watch any recent video of mine,  I made a pretty decent effort early on to fix my bad habits and keep my hands at 9 and 3.

What are you using for telemetry data?  Can you add OBDII data to it like throttle position?  or is it just a GPS enabled camera?

I'm jealous of people with OBDII... it's way easier to get ECU data into telemetry than what I had to do to get data into mine.  Still pondering on whether I want to add a brake pressure or steering angle input into my telemetry...
'89 RX-7 TurboII - Ronin Widebody and Ford 8.8 - 13B lolz
'89 Corolla SR5 - 4A-GE 20 Valve 6 speed swap Megasquirt
'01 Impreza 2.5RS - Daily driver/rally-x car
'81 BMW R65

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1118 on: May 16, 2017, 11:11:55 PM »
Don't take this the wrong way... but your hand position drives me crazy :)

There is a lot to be said about the car turning the same amount when your hands are in a certain place.  I think it makes things a lot easier and consistent, especially reacting to what the car is doing.  Watch any recent video of mine,  I made a pretty decent effort early on to fix my bad habits and keep my hands at 9 and 3.

What are you using for telemetry data?  Can you add OBDII data to it like throttle position?  or is it just a GPS enabled camera?

I'm jealous of people with OBDII... it's way easier to get ECU data into telemetry than what I had to do to get data into mine.  Still pondering on whether I want to add a brake pressure or steering angle input into my telemetry...


No offense taken at all.

2 things-

I just got the D shaped steering wheel, and not 10% sold on it yet. This was my first day with it, so I was more "handsy" than normal.

The other issue is I have a manual rack, and lose leverage on the steering wheel without moving my hand position. Because the rack is slower, I also have to move the wheel more. That said I'll keep it in mind and see if I can improve.

I do have ODB2, but my particular lap timer (AIM SOLO) does not integrate with the early GM OBDII interface. I really liked your latest video with the TPS overlayed. That would be valuable info.

What I do now is use a GoPro for video and use the AIM SOLO as my predictive lap timer/display in the car. I then use Race Render to overlay the GPS lap data with the video. The post production is a little more cumbersome than a GPS camera, but the in car timing display and presective lap times the AIM
SOLO provides is really helpful for experimenting with different lines.

Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline eage8

Re: LOF's LS1 FC track car build
« Reply #1119 on: May 16, 2017, 11:45:39 PM »
Don't take this the wrong way... but your hand position drives me crazy :)

There is a lot to be said about the car turning the same amount when your hands are in a certain place.  I think it makes things a lot easier and consistent, especially reacting to what the car is doing.  Watch any recent video of mine,  I made a pretty decent effort early on to fix my bad habits and keep my hands at 9 and 3.

What are you using for telemetry data?  Can you add OBDII data to it like throttle position?  or is it just a GPS enabled camera?

I'm jealous of people with OBDII... it's way easier to get ECU data into telemetry than what I had to do to get data into mine.  Still pondering on whether I want to add a brake pressure or steering angle input into my telemetry...


No offense taken at all.

2 things-

I just got the D shaped steering wheel, and not 10% sold on it yet. This was my first day with it, so I was more "handsy" than normal.

The other issue is I have a manual rack, and lose leverage on the steering wheel without moving my hand position. Because the rack is slower, I also have to move the wheel more. That said I'll keep it in mind and see if I can improve.

I do have ODB2, but my particular lap timer (AIM SOLO) does not integrate with the early GM OBDII interface. I really liked your latest video with the TPS overlayed. That would be valuable info.

What I do now is use a GoPro for video and use the AIM SOLO as my predictive lap timer/display in the car. I then use Race Render to overlay the GPS lap data with the video. The post production is a little more cumbersome than a GPS camera, but the in car timing display and presective lap times the AIM
SOLO provides is really helpful for experimenting with different lines.

Over the winter I added a racecapture mk3 box which is connected to my megasquirt ECU via CAN.

Mine is the more complicated version, but this one can plug into your older OBD2:
https://www.autosportlabs.com/product/racecapture/

it displays predictive lap data and stuff on your phone screen.

it is a lot of money just to get OBD2 data though.


I have a D shaped wheel on my corolla and don't really like it at all haha.  but I guess it is nice if you need a bit more leg room.

give static hand position a try though, if I can do it on my 15:1 rack on an autocross, I think you'll be ok on a 20:1 rack on a road. course... but that track does have some tight corners... but you can always make exceptions for those.  but yeah, I didn't consider the extra leverage part of the equation... I'll never get rid of my P/S :)  315 hoosiers demand it.
'89 RX-7 TurboII - Ronin Widebody and Ford 8.8 - 13B lolz
'89 Corolla SR5 - 4A-GE 20 Valve 6 speed swap Megasquirt
'01 Impreza 2.5RS - Daily driver/rally-x car
'81 BMW R65

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1120 on: May 17, 2017, 12:08:22 AM »
I'll have to check that out, thanks.

I like the manual rack, but if I had any more tire, I'd have to go PS most likely.

I have not had this happen with the D wheel yet but there are times like below when the car is out of shape and you release the wheel to let it unwind.. I'm not sure how well that will work with an irregular shaped wheel.

I'm ok with the feel of it so far, and it is a bit wider than the regular wheel in the normal grip area so it helps with leverage even more, but I'll have to take it to a couple more tracks and see if it gets in the way or not. I keep bringing the old wheel with me to the track in case I hate the D wheel.

http://youtu.be/SW4UnIAuG98



Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1121 on: July 14, 2018, 11:19:06 AM »
Hey everyone, I have an update!

The car is about ready for paint, you can see the hood has been smoothed out and primered, the one rust spot on the rear quarter was repaired, rear emblems shaved, and trim holes on the back of the front fenders were filled. I still need to remove the door trim and prep the sunroof panel for paint.

I got a new set of wheels last week for storage and when I drive it in the street. I was just going to get tires, but the wheels were basically free with the 4th of July discounts, and they don’t look half bad. 17x9.5 +15 on 255/40/17 all around.

[smg id=9992 type=preview align=center caption="355DDA6D 4EBA 4D82 9222 990099EABB1E"]



Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline onefastrx7turbo

Re: LOF's LS1 FC track car build
« Reply #1122 on: July 14, 2018, 02:33:43 PM »
Is this a new build, sir???
1986 RX7 - L92/T56 in progress
1989 RX7 - for sale!
1993 RX7 - waiting to be reborn
2006 Lexus GX470 For offroading
2010 RX8 - new DD
Past rides......
I don't really need them listed in my signature................

Offline spacevomit

Re: LOF's LS1 FC track car build
« Reply #1123 on: July 14, 2018, 03:11:18 PM »
Downforce when? :)

Offline largeorangefont

Re: LOF's LS1 FC track car build
« Reply #1124 on: July 14, 2018, 04:03:35 PM »
Is this a new build, sir???


No, same car for the last 75 pages. Been running for almost 5 years. It is still running great, I didn’t get to the track much this spring sadly. Going to hit it again in the fall.
« Last Edit: July 14, 2018, 04:08:58 PM by largeorangefont »
Quote from: cool
Sell it to spacevomit.  He'll finish it.