Brought to you in part by:

Great deals on auto restoration supplies!

.


  Mustangsandmore Forums
  Ford Racing
  What rpm would you launch at with 4600 stall and transbrake?

Post New Topic  Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic
Author Topic:   What rpm would you launch at with 4600 stall and transbrake?
70coupe
Gearhead

Posts: 483
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 08-22-2002 10:45 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
I will be hooking up the transbrake this weekend and wondered what chip you guys would start at in the 2 step? Currently I have a 3200 chip launching off a 2 step with my 4600 converter. Is it like a standard with the brake, the higher you launch the faster you'll go or is it still good to flash the converter?

IP: Logged

kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 08-22-2002 11:11 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
With my car, the higher I 2 step it, the faster it goes. Until traction becomes an issue. My convertor will flash in normal air around 6000 rpm, I 2 step it to 4500 most of the time. Any more than that on a normal track, and it really smacks the tires and makes the car inconsistent. Goes faster, but not near as consistent. With your convertor, I would try around 3800-4000 at first. But take this into consideration, I ran an entire season with a transbrake without a 2 step. Lots of fun, but not real consistent, and kind of hard on drivetrain parts.

Like any go fast part, it will take some trial and error to find what your car likes best. Maybe even for the first pass, leave the 2 step where it is now, and see if the car picks up at all just from using the brake.

IP: Logged

70coupe
Gearhead

Posts: 483
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 08-22-2002 11:18 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
Does the transbrake hit harder launching at 4000 compared to the 2 step at 4000 or the same? If its the same why would the brake be harder on drive train parts?

IP: Logged

steve'66
Gearhead

Posts: 9533
From: Sonoma,CA,USA
Registered: Mar 2000

posted 08-22-2002 11:18 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
On our 408w that stalls at 4500 we've tried everything between 3000-4400 with similar results. Our traction is marginal w/10" slicks and the 408 has more bottom end torque than your 'C'. Some of our best 60'ers have come with the two step at 3300 and 4000 sooo, we're still experimenting.

Good luck,

SteveW

IP: Logged

steve'66
Gearhead

Posts: 9533
From: Sonoma,CA,USA
Registered: Mar 2000

posted 08-22-2002 11:24 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 70coupe:
Does the transbrake hit harder launching at 4000 compared to the 2 step at 4000 or the same? If its the same why would the brake be harder on drive train parts?

The t-brake hits the tires harder than footbraking, because the drive line isn't loaded when the t-brake is released and is shocked when the solenoid is released.
Also the engine gets loaded up with fuel on the chip, so it's ready to GO when the two step is released. (GO= like a grenade)

SteveW

IP: Logged

kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 08-22-2002 11:25 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I'm not sure if it will hit harder or not. I'm assuming you are using dual line locks with the step now. I would think it would hit harder, but that's only a guess. Since the 'brake is actually engaging 2 gears at once, and is "locked up", I would think the sudden release of the other gear would be a harder and more sudden impact than line locks.

But, this all just a gues since I have never driven a dual line lock launched car before.

IP: Logged

70coupe
Gearhead

Posts: 483
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 08-22-2002 11:34 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
Actually, I have the two step wired to the brake pedal and only use the line lock for the burnout. The brake pedal is the only thing holding the car at the line and it works just fine. At 3200 on a 4600 stall I dont have much pull on the car.

[This message has been edited by 70coupe (edited 08-22-2002).]

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2005, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[Posting Pictures]

[About M&M][Acronyms][Calendar][Chat][Classifieds] [Members' Pics]

[M&M Conventions] [M&M Mug Shots]

[ Mustangsandmore.com Bookstore] [ Smokin' Fords] [Tech Articles]