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S550 mavisky's "LOUDCAR" Build Thread Profile - S550 Mustangs

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First event in the books. Finished 9th overall on PAX out of 140 drivers on a mid 30 second course where I dont think I got to full throttle once.

Still figuring out these Yokohamas. Tried to treat them like my Kumho V730's and ran them at 28 psi. They were gripped up, weren't rolling over too far, but also felt really soft on the sidewall. Talking to another driver who's also testing these out in another region and he was told to run them at closer to 37 by a nationally competitive driver there to help offset the softer sidewalls they have. Going to try that at the next event just to see. Car definitely feels gripped up though, but curious if other are at one end of the spectrum or the other on pressures. You can see how much the outside rear is folding under in the photo below.

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Still haven't made it to a national event, but just got news on how stiff our local region is. My friend and I finished 7th and 9th on PAX at the first event and the next week 5 of our competitors went to the national stop in south GA. 5 of the top 10 in our region placed 1st or second at the national event. Still want to make it to one to test the level of competition.

1st in our region - 1st place CS
4th in our region - 1st place STX
6th in our region - 2nd place SSP
7th in our region - my buddy Brent in CAMC
8th in our region - 1st place GS
9th in our region - where I finished in CAMC
10th in our region - 1st place STU
12th in our region - 1st place in EVX

I know that south GA doesn't bring out the stiffest competition nationally, but happy to be amongst this group of drivers in our division on a track where I barely went full throttle once in a car that's still full interior full weight.

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So I've spent the last month or two working on a re-design of the look of the vehicle and the quality photos are finally here to show it off.

I've always been a huge fan of the Mustang GT4 cars launched by Ford Performance so based the look on the factory launch livery and the livery from the Volt Performance race car.

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I also purchased the Tamiya 1/24 scale model kit (which I've yet to build) and within the instructions was a great set of images that allowed me to utilize some basic photoshop techniques to conceptualize the general look of the car and since all the graphics were scaled I was able to actually pull scale approximate measurements of all the designs as well. Obviously went with the 06 number to reference the car's build number J0006.

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I did have QSpek Vinyl cut the large white "billboards and numbers on the door" for me as part of their off the shelf offering, but utilizing a custom font. Beyond that I used a Cricut machine to cut logos and knifeless tape to cut designs on the rest of the car myself in my garage. In the end the design came out better than even I expected. It wasn't perfect and even since these photos I've tweaked some details like the front driver's side bumper not being level and the passenger side flag being the wrong direction. Overall I'm ecstatic with the overall look of the car and love the way it looks with the gunmetal Apex wheels.

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Ludachris

Chris
Staff member
Moderator
1,667
1,977
Exp. Type
HPDE
Exp. Level
5-10 Years
Newcastle, CA
So I've spent the last month or two working on a re-design of the look of the vehicle and the quality photos are finally here to show it off.

I've always been a huge fan of the Mustang GT4 cars launched by Ford Performance so based the look on the factory launch livery and the livery from the Volt Performance race car.

View attachment 94929

I also purchased the Tamiya 1/24 scale model kit (which I've yet to build) and within the instructions was a great set of images that allowed me to utilize some basic photoshop techniques to conceptualize the general look of the car and since all the graphics were scaled I was able to actually pull scale approximate measurements of all the designs as well. Obviously went with the 06 number to reference the car's build number J0006.

View attachment 94930

I did have QSpek Vinyl cut the large white "billboards and numbers on the door" for me as part of their off the shelf offering, but utilizing a custom font. Beyond that I used a Cricut machine to cut logos and knifeless tape to cut designs on the rest of the car myself in my garage. In the end the design came out better than even I expected. It wasn't perfect and even since these photos I've tweaked some details like the front driver's side bumper not being level and the passenger side flag being the wrong direction. Overall I'm ecstatic with the overall look of the car and love the way it looks with the gunmetal Apex wheels.

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Looks bad ass. I think you have to cover the black stripes with matching gray vinyl now.... and add one more decal somewhere on the car. :)
 
Well I knew these stickers would make me faster, but I didn't realize how much.

Sunday was my second event for the year due to a busy schedule. Unfortunately the Atlanta Motor Speedway hosts a Truck Show so half of our lot was full of lifted and lowered custom trucks so we were once again limited to a short track, but this one had some decent pace to it thankfully.

I'm still dialing in the new Yokohama's, but there's no doubt they're fast. I've settled on a 34 front and 32 rear currently, but I will need to bring the water sprayers for the next event to keep them cool for sure. We had the middle run session and my main competitor in his 2014 GT was again fast right out of the gate and I was playing catch up all day with him holding a half second lead over me most of the day and going into our 6th and final run he had stretched that lead to 6/10ths (40.5 to 39.9). We both lined up to fully send it and when I crossed the finish line I saw a time on the readout of 17 seconds. It turns out that someone had hit a cone in front of me and one of the workers had accidentally ran through the timing lights, throwing everything off for me and my competitor who was right behind me. This meant we both got a re-run immediately and with the tires boiling hot I figured I had nothing to lose at this point but to absolutely send it. Luckily I hit my braking points pretty close to where I wanted to be and the car rotated predictably where I needed it to. I knew I'd left some time on track in a few places, but when I crossed the finish line I saw a 39.9 on the screen. Due to the re-runs my buddy had gotten shuffled in front of me which meant I was the last run of the day for our class. I pulled into the pits and saw a time of 39.943 to his time of 39.983, a 0.040 gap in my favor and my first class win of the season. My buddy and I are both on 295 Yokohamas this year and it's shocking to see how close our cars are now despite his being a heavily lightened 2014 GT and mine being a full weight GT350.

At the end of the day this secured me 1st in class, 6th overall in raw time (only 1/1000th out of 5th), and 6th overall in PAX adjusted timing.



Video of my 7th and final run below.


Scraping the front splitter under braking.
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Moved on from the Steeda tuned DSC unit to the actual unlocked DSC unit. Got it in Thursday night and with the race on Sunday I didn't have much time to do any testing on the car so borrowed some maps from another GT350 autocrosser and went out. Felt a little soft and with a large amount of slaloms we slipped back a bit from last weeks results. Finished 2nd in class and in the top 15. Hard to tell as there were some timing errors that still don't seem to have been worked out in the results.

I've decided that my goals for this car are beyond what the Steeda Dual Rate springs are realistically capable of delivering (at least on the front axle) so will likely be replacing those at some point in the future. Looking at the AJ Hartman setup while retaining the Steeda competition swaybars and maybe moving to the GT350R/GT500 magneride dampers if I feel the car needs it.

Car bottomed out hard over a couple of gaps on the straights and ended up damaging the front bumper. Ordering up some quick disconnects for the front bumper to repair and reinforce the area where the bumper meets the fender. Also got my first cone mark on one of the new pieces of white vinyl so need to see if that can be lightly polished out or if I'll need to just replace it.

I've already begun to dive into the DSC tuning and using some of the Velocity tab fuctions to basically build 3 way adjustable digressively valved dampers using their software. Have another event in 2 weeks so will be able to test those out at that point in time.

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As mentioned the last event was pretty rough. Ended up breaking the driver's side bumper tabs and also broke about 80% of the little clips on the factory undertray mounts. Those little blue screw anchors are so tiny. I'm half tempted to try and find a way to just riv-nut the things with larger hardware, but have replacement units on the way. Going with the LMR quick release front bumper repair kit just to this is never an issue again. Also orderded up some new titanium skid fish from forum member Flyhalf as the factory splitter bolts all were ground down heavily this weekend. Had to make a run over to Lowe's racing to get some replacement stainless bolts for to replace the worn and even bent bolts from this last events course.

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While I had the whole front of the car off I decided to also make some upgrades by finally adding the Ford front tow-hook and finishing my splitter build with a vertical barrier.

The red tow hook would have clashed heavily so painted the tow hook black and will make some "Tow" decals for it to help it stand out in a complimentary color.

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Used some lawn edging and trimmed it to fit around the GT350 lower end and attached it to the splitter. Cheap and effective.



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Well after dropping about $250 in materials we've repaired the front bumper with LMR's quick release push button locks, added some extra titanium to the underside if the splitter further back by the chassis mounts, and also added a more defined vertical wall along the splitter to help make sure the air is staying on top of the splitter. Also added a Ford Racing tow hook for good measure while I had the bumper off and color matched it to the car.

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Well the titanium skid plates from @flyhalf and bumper repair mounts from LMR worked great and kept the splitter and bumper in one piece this weekend.

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Made some big changes to the swaybars and the DSC suspension tuner and ended up with the front end too stiff in corners and was fighting excess understeer the entire event. Have another event this weekend and hoping that by going down a notch in the front bar we can get it to move right until we can get the spring rates corrected. Still finished 15th overall in a field with numerous national champions on raw times 17th overall in pax. Was about a half second behind my class leader, but without the understeer I feel that would have been erased.
 
510
665
Exp. Type
HPDE
Exp. Level
5-10 Years
Wisconsin
Well the titanium skid plates from @flyhalf and bumper repair mounts from LMR worked great and kept the splitter and bumper in one piece this weekend.

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Made some big changes to the swaybars and the DSC suspension tuner and ended up with the front end too stiff in corners and was fighting excess understeer the entire event. Have another event this weekend and hoping that by going down a notch in the front bar we can get it to move right until we can get the spring rates corrected. Still finished 15th overall in a field with numerous national champions on raw times 17th overall in pax. Was about a half second behind my class leader, but without the understeer I feel that would have been erased.
Nice and its nice when things stay in one piece !!
 
206
313
Exp. Type
Time Attack
Exp. Level
10-20 Years
75024
I would suggest trying to add more rear bar before softening the front. You need all of the front roll stiffness possible to help the soft front springs. With aero now you could add more rear bar than you think. The only point you have too much rear bar is when you start getting excessive inside wheelspin.
 

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