Flashing the converter.......
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
Flashing the converter....... I'm pretty new to auto's. I've got a Rossler T-braked TH400 with an ATI 4k converter. My 60' times are usually around 1.40-1.45 leaving off the t-brake around 2500-3000 rpm's, and I consistantly lift the wheels about 6 inches. Today, I did my burn, pre-staged and went to set the t-brake, which I use to stage. The car rolled into stage, I looked down, and noticed I forgot to put it back in 1st from 3rd gear. I get it up into 1st, hit the t-brake, floor it and take off. The wheels came up about 2 feet and I cut a 1.37 60'! Why? Did I accidentally flash the converter? Maybe I need to do it more often. I couldn't get my 60' time down under 1.40 the rest of the day.
If you have it floored how is it flashing the converter?
Why are you only leaving at 2,500 - 3,000 rpm?
Are you spraying the car?
My car had a 4,500 stall and it left best floored on the motor and around 3,000 on the nitrous flashing the converter.
Best way to start is just launch at different rpms and see which nets you the best 60ft.
Some cars work better flashing the converter and some cars don't.
There are other things to consider, did you do the same burnout?
Was the tire pressure the same?
Do you check the tire pressure before each run?
Did they just prep the track before that pass?
What rpm did it stall to on that pass?
Do you have a log book to record settings, conditions and changes you make?
Why are you only leaving at 2,500 - 3,000 rpm?
Are you spraying the car?
My car had a 4,500 stall and it left best floored on the motor and around 3,000 on the nitrous flashing the converter.
Best way to start is just launch at different rpms and see which nets you the best 60ft.
Some cars work better flashing the converter and some cars don't.
There are other things to consider, did you do the same burnout?
Was the tire pressure the same?
Do you check the tire pressure before each run?
Did they just prep the track before that pass?
What rpm did it stall to on that pass?
Do you have a log book to record settings, conditions and changes you make?
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
If you have it floored how is it flashing the converter?
Why are you only leaving at 2,500 - 3,000 rpm?
Are you spraying the car? YES
My car had a 4,500 stall and it left best floored on the motor and around 3,000 on the nitrous flashing the converter.
Best way to start is just launch at different rpms and see which nets you the best 60ft.
Some cars work better flashing the converter and some cars don't.
There are other things to consider, did you do the same burnout? YES
Was the tire pressure the same? YES
Do you check the tire pressure before each run? YES
Did they just prep the track before that pass? NO
What rpm did it stall to on that pass?
Do you have a log book to record settings, conditions and changes you make? YES
Why are you only leaving at 2,500 - 3,000 rpm?
Are you spraying the car? YES
My car had a 4,500 stall and it left best floored on the motor and around 3,000 on the nitrous flashing the converter.
Best way to start is just launch at different rpms and see which nets you the best 60ft.
Some cars work better flashing the converter and some cars don't.
There are other things to consider, did you do the same burnout? YES
Was the tire pressure the same? YES
Do you check the tire pressure before each run? YES
Did they just prep the track before that pass? NO
What rpm did it stall to on that pass?
Do you have a log book to record settings, conditions and changes you make? YES
I know this is probably a retarded question, but I am new to automatics......so what excatly is "flashing the converter" and how do you do it?
lol, to flash teh converter, all you do is go WOT. flash point is the maximum slip before a converter starts to (theoretically) go to lockup. leaving at idle, then flooring it is what most consider flashing the converter.
LOL, with a 150 shot, I go on the trans brake, floor it, and the spray comes on once I let go of the button.... easy 1.38's and left with the fronts a foot off the ground.
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
I could take it to 7k with the tans brake if I wanted to. But that would be silly. I don't have a 2-step yet. My nitrous comes on at 3k rpm's, so if I launch at 3500, it kicks is as soon as the pedal hits the floor. I let off the t-brake and floor it at the same time.
Trending Topics
when i finally get a rear in my car this will be the first method im going to try with my set up, my other option will be leaving off the 2step at 2,700 or so to get some flash.................... any ideas which will net better e.t's and 60's?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
So you have a 7000 stall? or are you just not sure?
LS1TECH Sponsor
Joined: Aug 2002
Posts: 218
Likes: 0
From: Gainesville, FL
You need a two step. Until you get one, trying to find consistency when launching off of a transbrake (especially with nitrous) is going to be hard to come by. You need to be able to roll into the beams, hit the trans brake button, put your foot to the floor and then relase the button to launch the car.
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
Basicly whatever your motor can rev to on the TB is what size stall you have. If you can really rev to 7k on the TB, then you have a 7k stall or some problem with your stall or transbrake.
Well like in my case, I don't have a 2step on this particular car so I leave off the transbrake with a 150 shot, so it leaves hard. Now if I put in this other converter I have, an ATI 5500, which is more of a motor converter, I will need a 2 step for nitrous (maybe even for motor). But I would not leave at 2700 for a 400-600 hp car. I've been leaving at 3600 with my turbo Formula and I probably need to bump that up to 4500.
Yes that's a problem, my converter stalled to 4,500. My friends car I work on revs to 6,000 on the TB and he has a power glide trans and a motor that peaks at 8200.
If you're able to rev to 7,000 rpm there is something WAY wrong going on.
I would do as suggested, first figure out that problem, then setup the nitrous to not activate until the TB button is released, it's very easy to do and then put a two step in the car so you can find the best launch rpm.
I'd sure like to watch it leave at 7,000 though LOL.
You need to take the car out, put it in top gear, then with it around 2,500- 3,000 rpm floor the car and see what the rpm jumps too, if it jumps and pulls from 4k you have around a 4k stall, I would guess something is wrong with the TB activating, you can put it into park and rev to 7k, but if you're on the TB and it stalls to more than 4,000 something rpm something is messed up.
If you're able to rev to 7,000 rpm there is something WAY wrong going on.
I would do as suggested, first figure out that problem, then setup the nitrous to not activate until the TB button is released, it's very easy to do and then put a two step in the car so you can find the best launch rpm.
I'd sure like to watch it leave at 7,000 though LOL.
You need to take the car out, put it in top gear, then with it around 2,500- 3,000 rpm floor the car and see what the rpm jumps too, if it jumps and pulls from 4k you have around a 4k stall, I would guess something is wrong with the TB activating, you can put it into park and rev to 7k, but if you're on the TB and it stalls to more than 4,000 something rpm something is messed up.
