|
Transbrake...How Much Gain Using It?
#237074
02/26/09 04:12 PM
02/26/09 04:12 PM
|
Joined: Feb 2005
Posts: 1,539
Columbia Station, OH
MrBelvedere
OP
Mr Zipper Lips
|
OP
Mr Zipper Lips
Joined: Feb 2005
Posts: 1,539
Columbia Station, OH
|
Hey guys, I've been tossing around the idea of using the transbrake in the Belvedere. Can anyone give me an idea how much I can expect to drop ET wise, 60ft also? Best ET to date is 10.69 at 126mph Best 60ft has been a 1.49 but usually is 1.51- 1.52. Been footbraking it, leaving anywhere between 2500-2800rpm. Car has the following 470 Indy Ez's Flat tappet .687 lift (gross) 1050 AED Carb 727 w/brake JW 5500 converter (was set up for my combo) Dana 60 4.10's on a spool 29x9.0 Hoosiers Cal-tracs with monoleaf Rancho 9000's 6 point rollbar Car weighs 3700 or so with driver Thanks guys 
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: MrBelvedere]
#237076
02/26/09 04:17 PM
02/26/09 04:17 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Well if you bring the engine up to the peak torque on the launch vs the 2800 you might see 1.45 or even lower in the 60'... if you hook it up 
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: MR_P_BODY]
#237077
02/26/09 04:25 PM
02/26/09 04:25 PM
|
Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
master
|
master
Joined: Feb 2007
Posts: 6,295
U.S.
|
so they are stock 440 port indy ez's??? how much porting. just curious.
thx
Mopar Performance
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: MrBelvedere]
#237078
02/26/09 04:38 PM
02/26/09 04:38 PM
|
Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee
master
|
master
Joined: Feb 2003
Posts: 8,020
Pangaea
|
My old Duster, 2700lb, 452, 906 head, .590 MP cam, 4.10 gear, 727, went 1.48 60' leaving at 2000rpm off the foot, ET 10.20.
With a transbrake it went 1.38 60' leaving at 3200rpm, ET 10.10.
.10 gain in ET was all from the 60' gain.
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: B5 Bee]
#237079
02/26/09 04:57 PM
02/26/09 04:57 PM
|
Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
|
master
Joined: Oct 2004
Posts: 8,165
Left Coast
|
Quote:
My old Duster, 2700lb, 452, 906 head, .590 MP cam, 4.10 gear, 727, went 1.48 60' leaving at 2000rpm off the foot, ET 10.20.
With a transbrake it went 1.38 60' leaving at 3200rpm, ET 10.10.
.10 gain in ET was all from the 60' gain.
But this isn't always the case. Trans brakes are more for quicker/consistant leaves than they are for ET reduction.
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: BobR]
#237080
02/26/09 05:13 PM
02/26/09 05:13 PM
|
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
|
Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
|
I didn't see any gains from it but I did have a number of other issues that I eventualy sorted out and got it back to running 11.0's.
I guess I really won't know for sure untill next year when I can get some passes in the log book under similar weather conditions. 
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: WILD BILL]
#237081
02/26/09 05:40 PM
02/26/09 05:40 PM
|
Joined: Oct 2003
Posts: 842
Baltimore,MD
Bill_LBSR
super stock
|
super stock
Joined: Oct 2003
Posts: 842
Baltimore,MD
|
All depends if the car can handle the launch with a trans brake. Some peoples cars slow down with a trans brake. You may have to adjust the suspension on the car to take full advantage of the trans brake.
LBSR
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: WILD BILL]
#237082
02/26/09 05:41 PM
02/26/09 05:41 PM
|
Joined: Nov 2003
Posts: 10,384
Upstate NY
Bigcube
I Live Here
|
I Live Here
Joined: Nov 2003
Posts: 10,384
Upstate NY
|
Huge in  factor!  Love letting go of the button and feeling like I was just rear-ended by a semi 
Jim
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: Bigcube]
#237083
02/26/09 06:30 PM
02/26/09 06:30 PM
|
Joined: Oct 2004
Posts: 513
Springboro, Ohio
Hollywood
mopar
|
mopar
Joined: Oct 2004
Posts: 513
Springboro, Ohio
|
The first time I used mine, I thought I broke the whole driveline. But it was still going! It hits really hard and will bring the wheels up if you can hook up and have enough power. Just make sure your rear end and transmission is up to it.
Last edited by Hollywood; 02/26/09 06:31 PM.
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: Hollywood]
#237084
02/26/09 06:40 PM
02/26/09 06:40 PM
|
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
|
Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
|
I did break my entire driveline
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: MrBelvedere]
#237085
02/26/09 06:46 PM
02/26/09 06:46 PM
|
Joined: Jun 2003
Posts: 2,412
Weatherford, Texas
RapidusMaximus
top fuel
|
top fuel
Joined: Jun 2003
Posts: 2,412
Weatherford, Texas
|
Don't know if will pick up ET but it will absolutely change the "personality" of the launch and be harder on driveline parts...my personal opinion is if you're bracket racing in a delay box class is that its a must (obviously)...but I wouldn't do it just to try and pick up ET...IMHO...
1968 Plymouth GTX
1974 Dodge P/U Long Bed Stepside 318
2019 Ram 2500 6.4, auto, 4WD
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: WILD BILL]
#237086
02/26/09 07:14 PM
02/26/09 07:14 PM
|
Joined: Jan 2003
Posts: 2,771
Cedar Lake IN
CRT
master
|
master
Joined: Jan 2003
Posts: 2,771
Cedar Lake IN
|
Quote:
I did break my entire driveline
 ya sure did
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: Bill_LBSR]
#237089
02/27/09 09:36 AM
02/27/09 09:36 AM
|
Joined: Sep 2005
Posts: 589
Indiana
YbNoRmAL
mopar addict
|
mopar addict
Joined: Sep 2005
Posts: 589
Indiana
|
Quote:
All depends if the car can handle the launch with a trans brake. Some peoples cars slow down with a trans brake. You may have to adjust the suspension on the car to take full advantage of the trans brake.
That's it right there, you just don't put one in and not expect to tune the rest of the car.
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: MrBelvedere]
#237090
02/27/09 09:38 AM
02/27/09 09:38 AM
|
Joined: Jan 2005
Posts: 176
Sterling Heights, MI
John_T_Brown
member
|
member
Joined: Jan 2005
Posts: 176
Sterling Heights, MI
|
A trans brake is not about E.T. reduction it’s about consistency. It takes one more variable out of the human condition. When you couple the brake with a two step you leave at the exact same RPM every time assuming the car is not spinning the tire. If the car has carburetor issues (accelerator pump and/or transitional fuel circuit problems) you will be able to mask these conditions with a brake because you will leave the line with the power enrichment system already on. Remember, consistency will always win a race if your dial-in is set correctly.
If it ain't broke fix it anyway!
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: John_T_Brown]
#237091
02/27/09 09:47 AM
02/27/09 09:47 AM
|
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
|
Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
|
That's pretty much why I put one in. I was getting my best passes when I could hit 3K footbrakeing. Problem was it was just on the edge of rolling out of the beams. When it did rolll it would through me all out of whack.
Now, it's so much nicer 
|
|
|
Re: Transbrake...How Much Gain Using It?
[Re: WILD BILL]
#237092
02/27/09 10:07 AM
02/27/09 10:07 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
That's pretty much why I put one in. I was getting my best passes when I could hit 3K footbrakeing. Problem was it was just on the edge of rolling out of the beams. When it did rolll it would through me all out of whack.
Now, it's so much nicer
I tried to foot brake a couple of times, for me I would
roll above 2200 rpm and when I hit the pedal the
torque would slap the converter too hard and break
the tires loose. If I go up on the converter it plants
the tire
|
|
|
|
|
I think the driveline could handle it but is it worth it I dunno 
