tips for not pushing through brakes
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
tips for not pushing through brakes
I've got a 97 with a 76mm precision, Neal chance 3k stall, lnc 2000, built 4l60, 3.42 rear, 15" drag pack.
I'm trying to get more out of the converter on the footbrake, in 1st I can get to about 2400 rpm, with out the 2 step it won't build any boost and starts pushing.
If I put the car in 2nd gear and spool up with no 2 step, I get to about 7psi in 2-3 seconds.
I'm hoping there is a way to get the car to sit still in 1st so I can get a nice launch. Does anyone have any advice?
One idea I have is to put really aggressive road course pads on the rear, that way when the burnout heats them up they will have a lot of initial bite.
I'm trying to get more out of the converter on the footbrake, in 1st I can get to about 2400 rpm, with out the 2 step it won't build any boost and starts pushing.
If I put the car in 2nd gear and spool up with no 2 step, I get to about 7psi in 2-3 seconds.
I'm hoping there is a way to get the car to sit still in 1st so I can get a nice launch. Does anyone have any advice?
One idea I have is to put really aggressive road course pads on the rear, that way when the burnout heats them up they will have a lot of initial bite.
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
I've got an issue building boost on the foot brake on my front mount turbo setup. I can foot brake the car to 2800 rpm's on the 2 step and I couldn't build any boost. Last week my tuner adjusted my tune on the 2 step but was only able to get about 2lbs of boost built. I spoke with a tech guy from Hawk pads about getting a pad that would provide me with more clamping force to hold the car but he said a pad with that much clamping force doesn't exist. I could really use a converter that I could 2 step to 3300-3400 rpm's.
If you can build 7lbs in 2nd gear without the 2 step, have you tried putting the trans into 3 directly before launching?
If you can build 7lbs in 2nd gear without the 2 step, have you tried putting the trans into 3 directly before launching?
Last edited by junk c5; Oct 19, 2016 at 10:19 AM.
Supporting Vendor
Joined: Oct 2002
Posts: 50,281
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
Take a look at the Carbotech AX6 brake pad. If interested let me know.
Carbotech™ AX6™
The AX6™ is specifically engineered for Autocross applications. A high torque brake compound delivering reliable and consistent performance over a very wide operating temperature range of 50°F to 1000°F + (10°C to 537°C+). The advanced compound matrix provides an excellent initial bite, high coefficient of friction at lower temperatures along with very progressive brake modulation and release characteristics. Many drivers use the AX6™ for street driving as well, even though Carbotech™ doesn't recommend street driving with AX6™ due to possible elevated levels of dust and noise. AX6™ is NOT recommended as a race compound in most applications.
Carbotech™ AX6™
The AX6™ is specifically engineered for Autocross applications. A high torque brake compound delivering reliable and consistent performance over a very wide operating temperature range of 50°F to 1000°F + (10°C to 537°C+). The advanced compound matrix provides an excellent initial bite, high coefficient of friction at lower temperatures along with very progressive brake modulation and release characteristics. Many drivers use the AX6™ for street driving as well, even though Carbotech™ doesn't recommend street driving with AX6™ due to possible elevated levels of dust and noise. AX6™ is NOT recommended as a race compound in most applications.
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
Adam, do you think that is the best pad to try. I have no idea what pads are on the car now, I haven't changed them while I owned the car. I'm willing to try it, either way it should help with having new pads.
Try turning your 2 step off and trying again, you are limiting your self to the same rpm as first so it won't change anything.
Try turning your 2 step off and trying again, you are limiting your self to the same rpm as first so it won't change anything.
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
I'll give that a try. I'm attempting to avoid getting over aggressive with the ramp rate in my boost controller. But I guess I could ramp it in very quick in the 1st 2 seconds then build in another stage at a lower ramp rate. Either way I can only foot brake the car to 2800 rpm's.
Last edited by junk c5; Oct 19, 2016 at 12:07 PM.
Supporting Vendor
Joined: Oct 2002
Posts: 50,281
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
Adam, do you think that is the best pad to try. I have no idea what pads are on the car now, I haven't changed them while I owned the car. I'm willing to try it, either way it should help with having new pads.
Try turning your 2 step off and trying again, you are limiting your self to the same rpm as first so it won't change anything.
Try turning your 2 step off and trying again, you are limiting your self to the same rpm as first so it won't change anything.
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
I'll give that a try. I'm attempting to avoid getting over aggressive with the ramp rate in my boost controller. But I guess I could ramp it in very quick in the 1st 2 seconds then build in another stage at a lower ramp rate. Either way I can only foot brake the car to 2800 rpm's.
How much for a set?
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Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
No, 2800 is the highest rpm I can go before I start to push through the brakes. IDK if I want to send the converter back to PTC to have it loosened more on the bottom end. I'm not certain if a looser converter will effect daily drive ability. I'd really like it to foot brake to 3500 and keep its current street manners.
Thread Starter
Racer
Joined: Jun 2011
Posts: 405
Likes: 5
No, 2800 is the highest rpm I can go before I start to push through the brakes. IDK if I want to send the converter back to PTC to have it loosened more on the bottom end. I'm not certain if a looser converter will effect daily drive ability. I'd really like it to foot brake to 3500 and keep its current street manners.
Supporting Vendor
Joined: Oct 2002
Posts: 50,281
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL