I was watching and thought to myself "this is looking to be a close race.......oh wait nevermind" That was awesome

 

That explains it. You don't need another converter. I can barely get 2100rpm out of my converter on the footbrake and 1.7 sixtys spinning real bad as the boost kicks in.

On the TB it will stall up easily to 3000 and the sixtys drop to 1.42 with the wheels up.....boost around 8-10psi.

 

ya i keep that converter for a while, to loosing it up just add more boost.
nice pass

 

Damn that thing took off NICE mph!

 

Congrats, 144mph first time out rocks. I'm sure you will pick up big once you have more time with the transbrake. I have used mine about five times and went 9.8 a few times but that was launching like you were.

 

Wow. Congrats on a great first past. I can only imagine what that felt like.

 

Great run David!

Kurt

 

Real tires + trans brake + 2 step = low 9s easy.

It is definately making the power, converter still may end up being too tight though but that will take some experimenting and is easy enough to change..

 

i was thinking.. i have to put the 2 step to an rpm that is reachable on the brake.. so if i hold on the brake forever and eventually it touches 3k, then the 2 step will come on and i guess pick up the boost a bit more.. but as far as wheel speed i can't see the launch starting from more than 3k with this stall.

i will have to try this in my driveway this afternoon

hey those are real tires, you mean i need race car tires? i would prefer to just have a little more track under me

 

What is your converter? Mine is a TCT 9" converter, it used to go like 4500 on the 'brake when the car was blower. Now that's it's turbo, I have the 2step set at 3600 and it got there after a bit, but it was not in boost unless I sat on the brake for a bit. My current 'verter might end up being too loose, but I have not even come close to figurin that out, plus I'll probably need to shift pretty high.

 

I dont like to mess around with tires at 140mph - i've used most of my 9 lives already and you should know first hand what happens when you lose a traction at 135+ mph. Once you get the car to leave hard it will just spin those tires anyhow..

You can alter the timing with the 2 step on with the BS3 and that should help too. It just takes a few seconds before the boost gets high enough for the converter to start stalling higher, I've been there with a PT88 and 254 cubic inches.

Its very possible the converter is just too tight, remember you have 366 inches compared to Toms 427 with small twin turbos so there is a HUGE difference in torque at 3000rpm so ts not apples to apples. Where did you shift and what the RPM drop to out of curiousity?

 

Just some converter info....mine is a 10.5 It will pull the car forward at 875 rpm. Footbrakes around 2100 before the brakes let go. I can send it to 4000rpm on the transbrake if I want . Set your 2 step at 3000 and floor the transbrake...it should hit 3000 quickly.

 

nice run, that was fast getting it back together and runnin fast.
just a quick thingtho, you need to stop making 1,000 hp with street tires just askin for another slip up. be carefull man!!!!!!

 

yea i was kidding about the tires i have some 28" mt radials that i need wheels for.

the gearing in the 4l80 is whatever factory is.. should have been shifting around 6500 (std automatic valve body) and i wasnt paying attention to what it was falling to. i never even remembered to start the replay

 

Seeing how far the RPM drops on shifts will tell you a lot about the converter. Did you have a converter built for your exact combo or is it just an off the shelf?

Torque converter is 90% of yout 60' and ET so its got to be right, if you care about such things anyways. I use an 8" 5500 and it drives around better then a 2800 vig..

Just takes some getting used to, trans temp gets pretty hot when on the brake at WOT for 10 seconds so dont experiment too many times in a row in your driveway without some cooldown time. Also its hard on the converter letting off the throttle from WOT when on the brake hard so its best to experiment at the track..

 

All Yanks are "off the shelf".Great runs MM

 

I wanted to ask him the same thing but figured I'd wait till the Weds night meet...

This shift-extension is a good indicator of how high it will be flashing under boost. On the line on the brake, with less boost, you will get some smaller RPM number than your shift-extension.

 

David i tried mine today and in the driveway it went to 3500 in like 1 sec on the t-brake....hit the 2 step and started building boost but only got to like 5.2psi max
If you lean it out some.....add lots of timing on the tbrake, it will do what you need i bet. Read turbomustangs.com some and youll see what i mean. Lots of the guys running 8s and faster run loads of timing while on the 2step with the auto. It takes a bit to get it all dialed in with the timing map cause you have it ramp down with boost but you will get it. I expect about the same result with my first pass. but with a sucky 60' with a tranny swap and new combo..low 10s first time out is awesome.

EDIT
just went in the driveway and added 11 more degrees of timing...it reached 3500 on 2 step noticeably quicker so try adding some timing in that area of the tbrake

Also, more exhaust flow means quicker spool so run some sort of cutout if you can

 

Damn dave, you even got Raughammer to post

 

My converter will only footbrake around 2000 and maybe 1-2 psi but it will go to the moon and make 20 psi on the transbrake. I use my two step to limit the rpm/boost level.