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Organized Drag Racing and AutocrossDrag racing and autocross discussions and questions. Techniques, tips, suggestions, and "what will I run?" questions.
new 60ft on new motor
MXP custom adjustable torque arm and cross member
MXP chrome molly Lca
afco double adjustable rear shocks Qa1 front single adjustable
4.30 gear ratio
28x10.5 M/T pro bracket radial tires
60fts 1.222
1/8 6.034
3,320 pounds no driver, 3,500 pounds with me in it
11.82 at 115 mph in the quarter mile and 7.5 second 95 mph in the 8th mile
currently a moser 12bolt with a 3.55 rear gear (debating on switching to a 3.91 gear this winter?)
ProBuilt Automatic 700R4
Dart 406 gen 1 style sbc 531 crank hp / 513 crank torque.
stock style suspension with koni yellows, moog springs, UMI and Founders adjustable bars
Mickey Thompson ET Street SS (treaded) drag radials 26" tall on the old iroc wheels.
foot braking and launching from a 920 rpm idle
street car that plays ont he dragstrip, autocross, short course road course, and car shows.
Last edited by IROCZman15; 12-09-2020 at 12:24 PM.
The last time I replied to the thread I said I normally get low 1.30s and sometimes 1.29. My best ever has been 1.27 and I think I tripped the 60 foot lights with the back tires when I did that
Seeing as I'm in the market for new "slicks" I'm curious as to how well the MT SS drag radial does. This is the fully treaded version.
From all accounts, or at least the accounts in this thread, is that the radials do well. Not specified though is the type of drag radial used.
Something else I've been made aware of is that the chassis tuning of the old days, that is those days before the radials hit the track, is quite different from what these news tires require. Size for size it seems the radial just doesn't have the same traction as a bias ply slick. Suspension tuning needs to create separation so as to drive the radial into the track surface. The 4-link rear ends had the tunability, combined with a double adjustable shock to get the job done. Back in the day we just fit the biggest slick possible and dealt with it.
The question here is who's running these SS radial DOT tires and what suspension components are involved? And of course what was your 60' time?
Never tried radials but everything you know about slicks is different. Radials have a very stiff sidewall. They do better with standard tire pressures generally in the 24-35 psi range as going low with pressure causes the center of the tread to lift off the pavement. With the higher tire pressures, they have better rolling resistance compared to slicks so they can be faster. I know there's a few regional cars around here running radials in fast classes. I remember a local Mustang that used to race in extreme drag radial class. Can easily blow through a set of radials in less than 10 passes by hammering out the sidewalls. This is also a car that can run mid 7 seconds in the 1/4 mile.
I love my big slicks. 32" tall and 16" wide. Even on a track with minimal prep I can usually still get some sort of traction while cars with narrow tires spin. I've also hooked up too well in Edmonton when traction was fantastic and got all 4 wheels off the ground.
As for drag radials, even ones with minimal tread to get a DOT rating, you have to understand that these tires are not designed for street use. The rubber is too soft. They have a life expectancy of an oil change if used on the street.
skinny, I know you are well aware already, but for those who don't follow my build thread and just want to see what you and I are inquiring about..... my info is just a few posts above.
--- I am VERY curious to hear from others who have run the DOT treaded MT ET Street SS tire (this one: https://www.jegs.com/i/Mickey-Thomps.../3460/10002/-1 ) and how capable is it. even non-thirdgen cars that run this tire, what can it do? can it hook and deliver a mid-low 1.5 sixty foot? probably..... how about a 1.4x ??
of course suspension and weight all are a factor, but truly how capable are these tires. I have run them most of this year, but my car is not that fast. I intend to get it a lot faster, but they deliver 1.64-1.66 repeatedly when I have them at 19psi. I know these have a better reputation than those in their same DOT "category" which would be the M&H racemasters and the Nitto Drag radials, but what is their limit?
My best 60ft is 1.289
Lakewood 90/10 and Moroso trick springs(with 1.5 coils cut off) up front
Strange double adjustable in the rear
MT pro radial 3754x
Suspention is same as always. Stock front minus lakewood 90/10 struts and removed sway bar. Stock v6 springs
Back suspention is all umi adjustable tubular goodies, lakewood 50/50 shocks. Race weight of 3525lbs just weighed it this weekend.
28x9x15 pro bracket radial slicks.
4.10 rear gears.
Th350/5500 stall transbrake launch
Figured I would post my setup here hoping it helps someone. I posted about 10 years ago when it was a street/strip car. Now a complete strip car.
Racecraft K-member, A-arms and front coil over conversion
Afco Big Gun struts, Racecraft chain limiters
Spohn LCA with spherical rod ends, Spohn torque arm, spohn LCA relocation brackets
Afco Big Gun rear shocks, small diameter rear springs in stock location
Custom fabbed anti-roll bar.
29x10 Hoosier slicks at 15psi
Here is launch of the last pass I took in November. Trans-brake set at 3500 (should be closer to 5000) and short shifted at 6000 (instead of 8200) to keep the nose down just in case. Still lot of tuning to do with the shock settings, front end travel and launch RPM. 60' was 1.26
It's been awhile since I've done a update. Have a new pb 60 foot time. I'm not sure If it will get much better then this for a 9.90 1/4 mile car unless the air is perfect.
1.27 60 foot.
viking da shocks in back, lakewood 90/10 struts up front. Front travel limiters set to 2 inches total. Front is all stock type, k member etc. Rear has a anti roll bar, lca is set to lowest of 4 holes on strange s60 rear end. Rear is all tubular adjustable stuff, stock type. Shorty tq arm to frame mount. Car is 3525lbs race weight. 540bbc N/A pump gas with th350/t brake(set at 3800rpm) 4.10 Rear gear on a 28x9 pbr@19psig.
Got the car to launch good both on motor and on the bottle.
3620 pounds with me in it at the track
Street car, street driven to-and-from the track every time.
moser 12 bolt with 3.91 gears
UMI adjustable lower control arms at -2 deg downward angle
S&W adjustable torque arm with relocated mount onto a crossmember.
moog rear oem style springs with about 2 coils removed from each
Air-ride Drag-bags inside the coil springs, 7 psi drivers side and 18 psi pass side (planning on bumping both up a little bit)
Koni Yellow adjustable shocks
STOCK OEM 23mm swaybar !
Mickey Thompson ET Street SS drag radial tires 275/65/15 at 17.5 psi both.
Best all motor sixty foot was
1.48
best nitrous launch is on a progressive ramped-in 150 wet shot:
1.38
1984 Z28
Mild 383 engine dyno 462hp/473 tq
Stock front suspension. Including front sway bar, struts and springs
Jegs bolt in SFC
700r4 w/28-3200 converter
Moser 12bolt w/ 4.10 gear and TrueTrac posi
Non adj LCA with poly bushings and arms in lowest hole
Adj panhandpanhard bar with poly bushings
Stock Z28 rear bar with poly bushings
Competition Engineering adj rear shocks with poly bushings( dont know where they are set), stock Z28 rear springs.
Spohn adj torque arm with del-shere bushings.
pinion angle 1*down
LCA in lowest hole is facing 5*up
275/60-15 MT Street ET r
Launch at 1500rpm. Shift at 6000 rpm. Through the lights at about 6200.
12.24 @ 109 with a 1.63 60'
But most are in the 12.50/60 with a 1.8/1.9 spinning the tire. Any suggestions?? When it hooked I knew it was on a good run.
1.15 and 1.19 at 3870 lbs lol
275 radial
viking crusader shocks/struts
midwest chassis torque arm and 9”
Spohn sub frames
stock moog iroc rear springs
275 lb coilovers up front
umi rod end control arms
hotchkis panhard bar.
06-04-2018, 03:23 PM
