Can In-Gear Rev Hang Hinder Braking?
Jun 7, 2017, 09:09 AM
#16
I hardly understand what that means, but I feel like I'd be experiencing other symptoms if there was something wrong with the vac lines themselves. I don't think my tune has been adjusted for revhang so i'll check that first. my racing is pretty infrequent as of late due to school on Saturdays but i'll check the car over a little when I get another chance
watched a few videos, I don't have any of the symptoms of a bad booster - i'll check when I get home but seems like everything is in working order there. pedal also is very firm, I don't think it's a brakes issue as I recently rehauled the entire system, though I guess it could be...
Jun 7, 2017, 10:17 AM
#17
Sorry for not writing clearer. I was suggesting to try having the brake booster in a constant vacuum instead of having engine pull vacuum. I wonder if this will make braking better when you are in autox with stickier tires.
And check your brake booster line for leaks while you're there.
And check your brake booster line for leaks while you're there.
Jun 7, 2017, 12:19 PM
#19
I'm curious aboutkeeping my brake booster in constant vacuum. Does anyone know any drawbacks? I'm thinking about installing check valve inline with hose so it will hold biggest vacuum as long as it can (I'm sure check valve will somehow slowly leak).
Jun 7, 2017, 01:47 PM
#20
There already is a check valve inline with the hose......
You're going down the wrong path. IF you want more brake torque, put a more aggressive pad on there. I could engage abs on nt01's with hawk dtc60's if I really tried. Though the point is to threshold brake, ie not need the abs anyway.
You're going down the wrong path. IF you want more brake torque, put a more aggressive pad on there. I could engage abs on nt01's with hawk dtc60's if I really tried. Though the point is to threshold brake, ie not need the abs anyway.
Jun 7, 2017, 01:56 PM
#21
Thanks ExViTermini, I see the check valve now. I bought slotted rotors and hawks pads years back. Guess I'll install them soon.
Sorry Kyoo, scratch all my comments because the check valve should hold vacuum even if your engine hangs. So your brake booster shouldn't be affected.
Sorry Kyoo, scratch all my comments because the check valve should hold vacuum even if your engine hangs. So your brake booster shouldn't be affected.
Last edited by 2006EvoIXer; Jun 7, 2017 at 02:07 PM.
Jun 7, 2017, 02:29 PM
#22
There already is a check valve inline with the hose......
You're going down the wrong path. IF you want more brake torque, put a more aggressive pad on there. I could engage abs on nt01's with hawk dtc60's if I really tried. Though the point is to threshold brake, ie not need the abs anyway.
You're going down the wrong path. IF you want more brake torque, put a more aggressive pad on there. I could engage abs on nt01's with hawk dtc60's if I really tried. Though the point is to threshold brake, ie not need the abs anyway.
the rev hang, as infrequent as it was, never did bother me, but I only started to think of what impact it could have on braking after I lost engine braking in one axle while racing.
Jun 7, 2017, 02:36 PM
#23
EvoM Guru
iTrader: (1)
Rev hang will reduce vacuum, as well as reduce engine braking. It should be addressed.
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kyoo (Jun 7, 2017)
Jun 7, 2017, 02:51 PM
#24
If you're experiencing rev hang it will impede your braking performance. Hopefully your new tune will be able to address it. As I was saying via email, I too used to have issues with rev hang. Knock on wood I cant recall the last time it happened to me. Some ROM ID's are plagued with it and I know some ECU dissassemblers were working on uncovering hidden tables that would address the issue and some claimed to have fixed it but I do not think it was ever confirmed.
If your car is doing it often try a new ROM ID. Your pads are fine; they have plenty of stopping power. I say that as if Im not careful when I "stab" the brakes I can engage ABS on my 285 ZIISS
If your car is doing it often try a new ROM ID. Your pads are fine; they have plenty of stopping power. I say that as if Im not careful when I "stab" the brakes I can engage ABS on my 285 ZIISS
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kyoo (Jun 7, 2017)
Jun 7, 2017, 02:51 PM
#25
If you're experiencing rev hang it will impede your braking performance. Hopefully your new tune will be able to address it. As I was saying via email, I too used to have issues with rev hang. Knock on wood I cant recall the last time it happened to me. Some ROM ID's are plagued with it and I know some ECU dissassemblers were working on uncovering hidden tables that would address the issue and some claimed to have fixed it but I do not think it was ever confirmed.
If your car is doing it often try a new ROM ID. Your pads are fine; they have plenty of stopping power. I say that as if Im not careful when I "stab" the brakes I can engage ABS on my 285 ZIISS
If your car is doing it often try a new ROM ID. Your pads are fine; they have plenty of stopping power. I say that as if Im not careful when I "stab" the brakes I can engage ABS on my 285 ZIISS
Jun 7, 2017, 11:00 PM
#26
EvoM Guru
iTrader: (1)
Originally Posted by kyoo
English Racing is my tuner too! Aaron's already sent me a new map, I just won't have time to test it for a little while.
Jun 8, 2017, 06:23 AM
#27
the other thing is I'm running -3.3 degrees of camber. obviously that's on the higher end of the spectrum but it's not THAT crazy for autox. chances this is significantly hurting braking?
Jun 8, 2017, 08:06 AM
#28
EvoM Guru
iTrader: (1)
Maybe a little. My car does everything better with more caster, and -3* camber.
Jun 8, 2017, 08:45 AM
#30
EvoM Guru
iTrader: (1)
Depending on tire wear characteristics, I wouldn't reduce camber only braking. I run less camber because I have nearly +7* of caster with the Perrin PSRS (offset) and Dallas's top hats.