Hitting the tire hard

[ERV JR]

I am building for a stock susp class that runs a m/t 28 11.5 et street aprx 8.6 tread width. No trans brake allowed must run a 3 speed auto
I was wondering if leaving off idle and flashing the converter would help to hit the tire harder or would it be better to chip the launch rpm to 2500 to 3300and flash it from there? I know i will have to try it and see what works but wanted some info on what seems to work best foe other small tire foot brake cars. Oh its a 69 nova aprx 3200 lbs, cal trac bar with aprx 1000 hp with the unit.

[71 Nova]

My Nova likes to launch at 1700-1900 with a 3000 stall converter. Best 60 ft so far is 1.845. I have a sbc with approx 400 HP.
Launched at 1700 with a 2500 converter and a 150HP hit of nitrous. Best N2O 60 ft was 1.67. Haven't launched the Nova with the 3000 converter and N2O yet.

Footbrake, TH350, CE Slide a Links, stock multileafs and 4.10 rear gear, 3300 lbs, Hoosier QTPs 27x10.5-15s.

[67SS]

Flashing the convertor will make it hit the tires harder. Whether it helps your 60' times, you'll just have to try it and see. Theoretically, flashing the convertor will also slow down your reaction times as the motor will have to pick up rpm before the car starts moving.

[julven]

With my setup it always leaves harder and 60s better when leaving off idle.

[Craig W.]

When I ran all motor, my car was quicker by flashing the converter. I'd foot brake it to 1500 and let it flash to stall.

[John Wilson]

With my setup it always leaves harder and 60s better when leaving off idle.

Same here. Leaving at ~1500 works best for me. If I load the converter too much the front end will rise and I lose my front end travel.

[ericsz]

What about with a transbrake???? Will it hit the tires harder say if I have a 5000 stall would it hit harder leaving at like 3200 compared to leaving at 4000??

[ytnova]

It should hit about the same, the biggest difference will be in your reaction time.

[40Coupe]

Last weekend on a TNT track 62% humidity and 3200' DA I went a wheels up 1.36 60' leaving at 1500 RPM.

Also managed a new best 1/4 mile ET/MPH 9.73/136.61.

[sunsation540]

40 coupe WOW great numbers !!!! 3500 cool

[John_Heard]

Congrats 40Coupe on a new PB!

[cps57]

Last weekend on a TNT track 62% humidity and 3200' DA I went a wheels up 1.36 60' leaving at 1500 RPM.

Also managed a new best 1/4 mile ET/MPH 9.73/136.61.

Was that foot brakeing ? Tell Us a little about your set up. What type suspension. , cam etc.
Is the car street driven at all. What tires ?

[ERV JR]

Question for all the guys that foot brake to 1500 are you on a multi step to keep it there or are you doin it yourself ? I have done it before with my feet but wonder about a two step with a series switch on the brake and gas pedals for ease of staging, just wonder if the car would load up and foul plugs being on the limiter so low.

[40Coupe]

Thanks for the compliments guys!

I do drive it on the street some! I leave off the footbrake at 1500 RPM NO 2-step.......yet at least.

Here is the combo.

3525 lb '67 Camaro (all steel, full interior, etc.)
454, .060 over (low tension rings)
LS7 forged crankshaft
Lunati Pro mod 6.385"
13.3:1 with SRP 48 cc domes
AFR 305 cc w/CNC chamber and bowl option, 2.25/1.88, 114 cc chambers
Crower Severe Duty rollers w/HIPPO option
Bullet .738/.738 269/276 @ .050, 108 LSA
HP1000
Victor Jr w/.5" open spacer
Hooker #2205 2" super comps
3.5" x-pipe, Dynomax Ultraflows w/turndowns at axle
GZ Motorsports vacuum pump
TH-400
ATI 8" Treemaster 5700 flash
Moser 12-bolt w/4.30's

Suspension-Rear
stock monoleaf rear springs
Caltracs
Hoosier 30" x 9" radial slicks D07 on 10" wheels
AFCO double adjustables

Suspension-Front
Moroso Trick springs 200 lb/in
6" of travel
27.5" front runners
AFCO double adjustables

shifts at 7300 RPM stripe ~7300 RPM