Tested LS1 Front Conversion 60-0

[Six-is-Enough]

Well I finally got around to testing the LS1 front brake conversions. Its has only

been 18 months since I first tested Stock brakes with ABS versus ABS Delete. If you are not up on the results here is the thread:

http://www.syty.net/forums/showthread.php?t=31058

Quick Synopsis: with ABS average 160.3 ft, ABS delete 145.7 ft. (Stock rotors with Hawk sport pads, Manual cylinders in rear)

I used CBR conversion brakets, Junkyard LS1 calipers, Akebono ceramic pads and Power Slot slotted and dimpled rotors. All tests done with a Tazzo performance meter. 50 degree temp. On the same section of deserted dry road used before. The results were good, but I thought they would be better, but I did use a less aggressive pad this time. Once again I used threshold braking. Five stops in succesion.

Average: 137.1 ft Best stop 132.1 ( 3rd stop) Worst stop 142.9 ft (5th stop)

Stops were steady with minimal lock up at the very end. I did notice some sponginess in the pedal on the last 2 stops. Caused by pads, rotors??? I did not get this previously. Well at least that I noticed.

I hope here soon to do the rear LS1 conversion. I will post up the results when I do it. I might even try some in the rain just to get some #'s. But I won't have any for the stockers in the rain

.

Overall I am pleased with an 23 ft average improvement over stock!

BTW I am able to hold 20 psi on launches with this brake setup

.

 

['JustDreamin']

Re: Tested LS1 Front Conversion 60-0

Excellent post!!!

A post with factual results from testing. What a concept. Alot of magazines should do more of this stuff. Seems like most of the time, they change 12 things at once, which means you have a tough time learning anything useful.

Only thing I'm wondering: Did you use the same tires?

'JustDreamin'

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

Excellent post!!!

A post with factual results from testing. What a concept. Alot of magazines should do more of this stuff. Seems like most of the time, they change 12 things at once, which means you have a tough time learning anything useful.

Only thing I'm wondering: Did you use the same tires?

'JustDreamin'

I am afraid not. Goodyears HP first round of testing, Then BFG's g sports this last time. Somehow the tread on the Goodyears got tore up at nationals in 2005. http://s94691562.onlinehome.us/albums/Jduncan/aam.wmv

 

['JustDreamin']

Re: Tested LS1 Front Conversion 60-0

I guess the question that needs to be asked is: Do the new tires have similar grip characteristics or are they significantly better or worse?


Everybody looks at big brakes (like 15" rotors and 6 piston calipers) and ooh's and ahh's. But most fail to realize that tires play a HUGE role in brake performance. Crappy tires = crappy braking. Which is why I hate the ProStock movement. Big power, damn fast cars (in a straight line), itty-bitty tires, and no good way to slow down besides a parachute or hitting something.

'JustDreamin'

 

[sytyguy]

Re: Tested LS1 Front Conversion 60-0

Very good info Jeremy. Glad to hear that you're getting those numbers!

Hood

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

I guess the question that needs to be asked is: Do the new tires have similar grip characteristics or are they significantly better or worse?


Everybody looks at big brakes (like 15" rotors and 6 piston calipers) and ooh's and ahh's. But most fail to realize that tires play a HUGE role in brake performance. Crappy tires = crappy braking. Which is why I hate the ProStock movement. Big power, damn fast cars (in a straight line), itty-bitty tires, and no good way to slow down besides a parachute or hitting something.

'JustDreamin'

I would call the tires very similar in performance, just more tread on the new ones.

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

Very good info Jeremy. Glad to hear that you're getting those numbers!

Hood

Thank you and thanks for making the ABS delete kits. It was one of the best mods I have done to my truck. Right up there with the 80E and Alky Injection.

I feel like the #'s would even better with a more aggressive pad like a Hawk sport. But I couldn't take the dust and noise anymore.

 

[WyoSyclone]

Re: Tested LS1 Front Conversion 60-0

Nice post and specs Jeremy... has me seriously thinking about deleting the ABS and going with a proportioning valve..... thanks dude, another weekend project to make my wife think I'm neglecting her.... :doh:
(hey guys, shouldn't we have a 'mad wife' smilie??)

 

[91blazins10]

Re: Tested LS1 Front Conversion 60-0

nice info, id really like to see some number with the rear ls1 brakes, everyone says stick with drums in the rear to launch better, but if theres a decent improvement in stopping distance over drums then I would def ditch them.

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

nice info, id really like to see some number with the rear ls1 brakes, everyone says stick with drums in the rear to launch better, but if theres a decent improvement in stopping distance over drums then I would def ditch them.

Give me a couple of months. I plan on doing the LS1 rears. I already have the calipers and hardware. When I first do the rears it will be on the cheap. Cheap pads, Stock turned rotors, Rubber lines, etc. Eventually I would like to go to the "good" stuff.

I think it will help alot on a Sy/TY. Might take some time to dial in the balance issue(s). I would be happy to get it down around 120 ft 60-0. thats my goal at least. We will see....:tup:

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

Nice post and specs Jeremy... has me seriously thinking about deleting the ABS and going with a proportioning valve..... thanks dude, another weekend project to make my wife think I'm neglecting her.... :doh:
(hey guys, shouldn't we have a 'mad wife' smilie??)

I used Hood's ABS Delete kit and kept the stock proportionong valve. Works fine for me.

BTW X2 on the mad/neglected wife smilie.

 

[Black Knight]

Re: Tested LS1 Front Conversion 60-0

Great info Jeremy, like every has said it's nice to see actual numbers :tup:

Have you checked your rear brakes lately to see if they're adjusted up? Just to see if maybe that number could come down at all before you change the rear over.

id really like to see some number with the rear ls1 brakes, everyone says stick with drums in the rear to launch better, but if theres a decent improvement in stopping distance over drums then I would def ditch them.

I'm gonna make a guess and say yes, you will see a better stopping distance with a rear disc setup.

Rear brakes will hold better from a dead stop, but while moving they're no where near as accurate as a disc setup. Alot of times when people wear out the rear brakes on a drum vehical you can see that the front shoe is worn down way more then the rear, simply beacuse of the design of the setup.

That's probably not the main reason, but one of the many why almost 75-80% of the vehicals being built today are 4 wheel disc. Not only is it a better engineered setup, but they run cooler, and have why less parts to go wrong ( or deal with ).

Now you'll see alot of manufacture's are only putting an extra .020-.030 of material over the minimum on all they're rotors to save in costs when building the vehicals, plus you have to replace them everytime you do a brake job which saves time ( because you don't have to waste any time machining them ) and costs the consumer more money on their return visits :roll:

I'm wayyy of base, good job Jeremy

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

Great info Jeremy, like every has said it's nice to see actual numbers :tup:

Have you checked your rear brakes lately to see if they're adjusted up? Just to see if maybe that number could come down at all before you change the rear over.

Yeah when I first got my Sy and was going over everything the rear shoes looked like new(40,000 miles). They were not adjusted up at all. But in my pursuit of faster E.T.'s I have upgrade to two long shoes, manual wheel cylinders, aluminum drums, adjusted up and check them regularly. I stated earlier that I can hold 20 psi on a launch and not creep a inch. The rears play a big part in holding on the start.

I think I can get adequate holding power with the Discs in rear. If not then hopefully the less rotating weight and less drag will make up for it.

 

[SyTyJedi]

Re: Tested LS1 Front Conversion 60-0

Did you have any problems with the ABS before?

How close did you feel you were to locking them up on the non-abs stops?

I'm hesitant to remove mine since it has never given me any problems, and even tho I don't plan on driving it in the rain I feel a situation is inevitable of stopping on a wet surface or having to stop and turn around something at the same time.

 

[Six-is-Enough]

Re: Tested LS1 Front Conversion 60-0

Did you have any problems with the ABS before?

How close did you feel you were to locking them up on the non-abs stops?

I'm hesitant to remove mine since it has never given me any problems, and even tho I don't plan on driving it in the rain I feel a situation is inevitable of stopping on a wet surface or having to stop and turn around something at the same time.

It seemed to be working fine. I was planning on doing the LS1 fronts and wanted to get some #'s with the stock front brakes. Then before I could do the conversion( a couple of months later) the ABS light come on. So after talking to some Sy/Tyers at nats, all were very postive about deleting the abs, I went ahead and got Hoods delete kit.