broke an axle on launch at atco tonite.... pretty scary
- Thread starter ed hess
- Start date
myclone
Donating Member
Ed,
Just so happens on the way home from work the other morning I was wondering the same thing about the hydra boost working with the engine off. Since Ive got that system on the dually and work nights (no traffic) I waited for a straight piece of road and switched the ign off at ~50mph. I had enough brakes to bring it to a stop with no extra effort and had brakes in reserve.
Once I got to my driveway which is pretty steep I got about half way up, stopped, shut the ign off, and drifted back down the driveway stopping then letting it drift backwards again to see how long the assist would last. I did that prolly half a dozen times before the pedal started to get stiff and it took extra effort.
My point? IMO I had enough reserve assist left to hual the dually down from 75+ mph without even thinking of getting excited.
Just so happens on the way home from work the other morning I was wondering the same thing about the hydra boost working with the engine off. Since Ive got that system on the dually and work nights (no traffic) I waited for a straight piece of road and switched the ign off at ~50mph. I had enough brakes to bring it to a stop with no extra effort and had brakes in reserve.
Once I got to my driveway which is pretty steep I got about half way up, stopped, shut the ign off, and drifted back down the driveway stopping then letting it drift backwards again to see how long the assist would last. I did that prolly half a dozen times before the pedal started to get stiff and it took extra effort.
My point? IMO I had enough reserve assist left to hual the dually down from 75+ mph without even thinking of getting excited.
Raist103
Engine Killer, iPhone Killer, Lawnmower Killer
i just think you should think about those brakes. i was going 6.7x in the 1/8 when my mass air and o2 went bad in the gn causeing me to slow down and brake at the turn around and guess what i had no brakes, just think what would have happened if the o2 and mass air did not go bad at the 1/8 i would not have stopped. this happened in my 30k mile gn and in my 130k mile gn with a brand new gm powermaster luckly that car was not moving at the time just got in one day and they were gone. you think broken axle was a bad feeling try not having your brakes at the end of the track, it sucks...
ed hess
race or get outta the way
skata said:well that explains why your truck spun around huh?
both tires on the passenger side pulling like a mofo.
what are you gonna do for front axles? cryo treat?
A new drivers side front axle is installed allready.
not messin around gettin it back together... really would rather drive the sy to NASTE event at hooters on the 19th than take the grand cherokee.
So when a powermaster unit fails I assume you still have soem brakeing but just no power assist?
if this is true then i can still stop by using the line lock to build pressure with each pump.
fwiw i have actually done this in the shutdown area to see if it could make the truck stop quicker. it did. Amazingly quick actually.
with this cam and only 10 lbs of vac i could stop fine but i was amazed at how much quicker it cold stop using the line lock for a few seconds on 3 pumps of the pedal... I dont recommend doing this ...
SO am i correct that if a powermaster fails you still have some braking ability just not power assisted?
ed
THEMADTYPH00N
Active member
ed hess said:
Not to be anal or anything, bu tyou keep saying powermaster. I think what you really want is the Hydraboost system which I believe is different from the GN powermaster system(which sucks). I also think if you used the hydraboost system you would have no need for your line locks anymore. I may be wrong but since the hydraboost works off hydrualic pressure pumping the breaks would do nothing. I recall John and Nolan both saying they could just put there foot on the break pedal at the line just one time without any pumping and it would hold insane amounts of boost.
ed hess
race or get outta the way
bigtime said:
i dont pump on the line... i drag it in with 2 previous pumps holding the pressuree with the line locks. coming in with a load helps build heat in the turbo at the same time. bump light on, bump bottom bulb on and push the rest with all ya got. then let go of button on last amber.
doing it like this works.. the other thing is i have a 1.34 exhasut housing and spool up on datalog shows 1.5 seconds... as you saw how fast it hit the rev limiter in the video.
leaving off a button a get much better reaction times than i could ever get trying to coordinate feet.... ok so my coordination sucks... lol
ed
Nova67ss
New member
Brake problems on questions..
I have a friend thats driving endurance with his volvo either a 3 or a 12 hour race ... wot on the stretch and maximum break in the turn and then wot to the next hit the breaks and so on for minimum 3 hours race and sometimes he does it on 12 hours race... thats tuff for engine and brakes and chassie.. they are at least 3 drivers on these races..
I go with them as mecanic and fuelguy.. I fill about 60 litres of fuel in 10 seconds.. then race is on again.. :lol:
http://www.flatoutracing.se/
Go down to Filmer and look at the mantorpfinal 2004.. you´ll see neither rain stopps these races.. I´m the one dressed almost totaly orange ..
Lookin over his car I notis the huge porche brakes and NO powerbrakes, on Q why. answer was you cant rely on a powerbrace all time and in a endurance situation they can fail so they changed the fastening point on the pedal of the plunge in to the master cylinder to have greater leggpower to the brakes.. workin no hassle.
Might bee someting to consider even in 1/4 mile racing?
I´ll go NO powerbrakes and for the moment all around drums on my Nova.. I´ll consider disc in front but still no power.
And I will use my Nova on the streets for 90% of times its only a weekend warrior.. :lol:
I have a friend thats driving endurance with his volvo either a 3 or a 12 hour race ... wot on the stretch and maximum break in the turn and then wot to the next hit the breaks and so on for minimum 3 hours race and sometimes he does it on 12 hours race... thats tuff for engine and brakes and chassie.. they are at least 3 drivers on these races..
I go with them as mecanic and fuelguy.. I fill about 60 litres of fuel in 10 seconds.. then race is on again.. :lol:
http://www.flatoutracing.se/
Go down to Filmer and look at the mantorpfinal 2004.. you´ll see neither rain stopps these races.. I´m the one dressed almost totaly orange ..
Lookin over his car I notis the huge porche brakes and NO powerbrakes, on Q why. answer was you cant rely on a powerbrace all time and in a endurance situation they can fail so they changed the fastening point on the pedal of the plunge in to the master cylinder to have greater leggpower to the brakes.. workin no hassle.
Might bee someting to consider even in 1/4 mile racing?
I´ll go NO powerbrakes and for the moment all around drums on my Nova.. I´ll consider disc in front but still no power.
And I will use my Nova on the streets for 90% of times its only a weekend warrior.. :lol:
Raist103
Engine Killer, iPhone Killer, Lawnmower Killer
luckly everything died about the 1/8, and from the car just about shutting down i was going slow enough at the end of the track that i just used the e brake to come to a complete stop. but at 130 or more i would not want to have to use the e brake as the only means of stopping.
