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Official Fiesta ST Lap Time Thread

Messages
306
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352
Location
Concord, CA, USA
#41
Buttonwillow 13CW 2:18.5
First time on this track
Ambient temps from 80-107°

Cobb intake, intercooler, AP with stratified 91 tune.
Mountune radiator and lowering springs
Stock brakes with Motul RBF600 fluid
205/45 Re71r on 16x7 Sparco Assetto Gara
Semi-stripped interior (rear seat delete, sunroof delete, no headliner, Sparco F200 bucket seat)

Screenshot_20210721-051928.jpg
 


Erick_V

Active member
Messages
758
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885
Location
San Antonio
#42
Buttonwillow 13CW 2:18.5
First time on this track
Ambient temps from 80-107°

Cobb intake, intercooler, AP with stratified 91 tune.
Mountune radiator and lowering springs
Stock brakes with Motul RBF600 fluid
205/45 Re71r on 16x7 Sparco Assetto Gara
Semi-stripped interior (rear seat delete, sunroof delete, no headliner, Sparco F200 bucket seat)
How did you go about deleting the sunroof? I’ve wanted to do the same
 


ronmcdon

Active member
Messages
557
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670
Location
Beverly Hills
#43
Laguna Seca CCW 10-23-21
1.52.577

stock boost (something wrong with car where cannot get above 21 psi)
16x8 +38 rpf1 wheels, 225/45 dunlop z3 200tw tyres, meister gt1 coilover w 8k/6k swift springs, approx -3 front & -1 rear camber, all around tb bracing, polyu powerflex front control arm bushings, dna solid rear torsion bushing, wavetrac lsd, all around vibra technic mounts.
 


ronmcdon

Active member
Messages
557
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670
Location
Beverly Hills
#44
forgot to mention, great 65f weather and settled on 41psi front and 40psi rear, hot tire pressures.

much better tire wear and no rollover compared to 33-35 hot tire temps
 


M-Sport fan

9000 Post Club
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Location
Princeton, N.J.
#45
Laguna Seca CCW 10-23-21
1.52.577

stock boost (something wrong with car where cannot get above 21 psi)
16x8 +38 rpf1 wheels, 225/45 dunlop z3 200tw tyres, meister gt1 coilover w 8k/6k swift springs, approx -3 front & -1 rear camber, all around tb bracing, polyu powerflex front control arm bushings, dna solid rear torsion bushing, wavetrac lsd, all around vibra technic mounts.
With whatever ride height you are at with those coil overs/spring rates, and that camber, are you rubbing that setup at all, anywhere, under any conditions (braking while turning in the 'corkscrew' or elsewhere, even though you are not supposed to be doing that for fast times, power on at apex exits, wheel lifting turns, etc.) with that wheel/tire setup, on that track?
 


ronmcdon

Active member
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670
Location
Beverly Hills
#48
With whatever ride height you are at with those coil overs/spring rates, and that camber, are you rubbing that setup at all, anywhere, under any conditions (braking while turning in the 'corkscrew' or elsewhere, even though you are not supposed to be doing that for fast times, power on at apex exits, wheel lifting turns, etc.) with that wheel/tire setup, on that track?
yes theres very slight rubbing that happens when I park and steering at full lock. usually its a mild pop. didnt have any rub when my camber was -2 front, -1 rear. no rub anywhere on Laguna Seca (or Streets of Willow) No rub even right before the corkscrew and had coaching on where on the lines to take at Laguna.

should also add my fenders are rolled and slightly pulled.

if I had to guess, the rub might be from bolt inside the front fenders which I will eventually trim down.

btw - Laguna is a fantastic track. very addicted and going back in dec with my cahmero
 


M-Sport fan

9000 Post Club
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Princeton, N.J.
#50
yes theres very slight rubbing that happens when I park and steering at full lock. usually its a mild pop. didnt have any rub when my camber was -2 front, -1 rear. no rub anywhere on Laguna Seca (or Streets of Willow) No rub even right before the corkscrew and had coaching on where on the lines to take at Laguna.

should also add my fenders are rolled and slightly pulled.

if I had to guess, the rub might be from bolt inside the front fenders which I will eventually trim down.

btw - Laguna is a fantastic track. very addicted and going back in dec with my cahmero
THANKS!

Just trying to get a read on how badly that size A052s (like 0.1" wider tread width, same section width, 0.2" taller than the Z3s,) on a 16x8, 40ET Dekagram will rub on a factory ride height, minimally cambered, and un-pulled fender, un-trimmed fender mounting bolt FiST.
 


Messages
306
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352
Location
Concord, CA, USA
#51
How much weight did you save? Any pictures from the inside? Did you leave it like that on the outside or try to blend it?
Not sure exactly, I'd estimate the stock sunroof components as maybe 40ish lbs, but I did not weigh it, and in my case it wouldn't have been a fair comparison cuz what prompted me to do this was my sunroof breaking in the first place.
I left the exterior as is, I kinda like the industrial, racecar vibe it gives the car. I've thought about painting it at some point, but unsure.


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Messages
306
Likes
352
Location
Concord, CA, USA
#52
Couple updates here.
1. Chuckwalla Raceway (Sept 18, 2021)- 2:15.345
No changes in mods from Buttonwillow back in July. First time on this track on a super hot day.

2. Streets of Willow Springs CCW (Nov 5, 2021) - 1:29.506
Only change was running 215/45/16 BFGoodrich Rival S 1.5 tires on the 16x7 Sparcos.

3. Willow Springs International Raceway AKA Big Willow (Jan 15, 2022) - 1:39.072
Only change was running the same BFGoodrich tires on new 16x8 Konig Dekagrams. Screenshot_20220115-185920.jpg Screenshot_20220115-190247.jpg Screenshot_20220115-112426.jpg

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Messages
306
Likes
352
Location
Concord, CA, USA
#55
Buttonwillow Raceway Park 13CW - 2:09.729

No change in mods, high of 85°, car overheated right after my fastest lap. Need a thermostat and oil cooler for sure IMG_20220411_075939_739.jpg

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Messages
348
Likes
397
Location
Riverside,CA
#57
Took my 100% stock 2017 fiesta SE on big willow on 650TW tires with 28k miles on them and did a 1.53
1675275151000.png
 


Messages
16
Likes
19
Location
Fresno, CA, USA
#58
Buttonwillow: 13CW 2:09.415

s280 on 91 octane with full Interior
M factory lsd
Rt660
St xta coil overs with track alignment and corner balancing.

The car got really hot at the tail end of the day and I realized later that it still had a bubble in it. I think this car currently is capable of a 2:05. I’m leaving some in the table with my braking reservations. I need to get more comfortable there and getting to the limit.
 


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