z28rob18

iTrader: (7)

I have the ls1 front brakes on the car. I noticed that they have wheel speed sensors. Did the lt1 brakes have them I don't remember a wire going to them. Also just picked up the rubber line that goes to the calipers and noticed they don't reach the body to mount how does everyone mount them or how do they mount?

Badazz 97 TA

iTrader: (18)

yea the LT1 has the same thing for the sensor. The rubber lines are too short. They can work, you either have to bend the metal mount or buy longer lines. supposedly corvette lines are longer. or you can buy the stainless steel lines from any vendor and usually they come a few inches longer.

jasonz28camaro

iTrader: (13)

im going to hop in, sorry. i have never read up on this matter myself but i installed mine 2 years ago and noticed the hoses were shrot, i bent the bracket a little but it seams like maybe not enough. my brakes suck... could that be the reason, and should i also do as directed above. sorry again

Badazz 97 TA

iTrader: (18)

You might want to check how stretched out the line gets when you turn the wheel all the way in both directions. lock to lock. It could also be your pads or crappy old fluid. I noticed a huge difference in the way it stops between LT1 and LS1 brakes. I used stainless steel line to avoid that situation completely.

the_merv

iTrader: (88)

I bent the Metal ones on the Kmember..

camar0corey

iTrader: (22)

Interesting, mine seem tight weight off wheels, but have never had any problems lock to lock, with the stock lines or with the braided lines I just installed. I drove with the stock lines since 2005. I did swap the spindles completely, but I don't think this would have any bearing on the issue? Or does it?

SS RRR

iTrader: (2)

You installed LS1 brakes and they still suck?
What kind of vacuum are you pulling?

wrd1972

iTrader: (12)

I installed full LS1 brakes a while back and last year my brakes were not performing well. The booster was damaged and not holding adequate vacuum. Replaced the booster and they were back.

jasonz28camaro

iTrader: (13)

Not sure, I'll have to hook up a gauge. I'm going to mess with the hoses first. The car doesn't like to stop when the wheel is turned hard like parking the car.

boostedlt1

iTrader: (2)

i converted to the 1le set-up, my lines wouldn't fit so i unbolted the bracket on the body, bent the lines so it was perpendicular to where it bolted before, then welded it on. works perfect!

alone_and_insane

also piggy-backing this thread, I'm doing the swap this weekend. Do I need just the spindles or will I need different knuckles also?

riceburnerZ28

iTrader: (20)

You'll need the both spindles.

alone_and_insane

Engrish? I know I will need both front spindles (driver and pass. side). When I called the parts yard they asked if I needed knuckles also, and I wasn't sure. Hence what I asked.

Badazz 97 TA

iTrader: (18)

what would be the knuckle? wouldnt that be the spindle?



differences between LT1 vs. LS1 spindles and calipers for future referance






this is all you need for the swap

Paul Bell

iTrader: (9)

All forth generation F-Bodies have the same front wheel ABS sensors-they're inside the wheel hubs.

When swapping brakes around, the master cylinder MUST match the rear calipers. EG: Using LT1 rear brakes? Use the LT1 master cylinder. Using the LS1 rear brakes? Use the LS1 master cylinder.

The fluid reservoirs are also different as the LS1 version has a level sensor. And, one fitting on the master cylinder is a different thread size.

The steering knuckle can also be called a spindle. GM calls it a knuckle.

Ebo083

Paul,

I plan on doing a full (front/rear) LS1 brake swap on my LT1. From what I've read I'll need to run a LS1 MC also because the MC must match the rear calipers. What is the one different fitting on the LS1 MC that you referred to? How can I overcome this problem? Anything else I might need to know? Thank for your help!

Rob94hawk

iTrader: (1)

I did the swap on the front. Nothing had to be changed. The wheel sensor connections are just reversed you'll see what I'm talking about when you do it.

earlz28

iTrader: (1)

Thread is from last year but still good info. What else should be replaced when this swap is done?

Paul Bell

iTrader: (9)

EBO, welcome to LS1tech!

It looks like you already know to search for what you need to know. Great!

LT1 rear brakes have the parking brake mechanism within the caliper. This required a spring to pull back the piston much like a drum brake. A residual pressure valve in the MC works with it.

LS rear brakes have a separate drum brake in the hat as the parking brake. No springs in the caliper so no need for the residual pressure valve in the MC.

This is the difference in the two master cylinders. The master cylinder must match the rear brakes. If you're just changing front calipers, no MC change is needed.

The MC reservoir tank will swap between the units. The LS tank has the level sensor, the LT tank does not. Knock out the roll pin and the tank comes off the MC.

One fitting on the MC is a different thread between the two units. I suggest you take the original tube and MC you want it to fit to a parts store. You're gonna need to make up the needed line.

Paul Bell

iTrader: (9)

Most people swap a LT1 car to LS1 brakes. The fronts are bigger/better and the rear parking brake works better.

I swapped my LS car to LT rears because they clear 15 inch wheels better. My fronts are 13 inch rotors with four piston SSBC calipers.