Project "Payback" - Lateral-g Forums

Vegas69 · #1 07-16-2010, 08:06 AM

Third time was the charm. I finally tackled tearing the master cylinder back off and switching brake rod style. I was experiencing residual pressure in the brake lines. It turns out you can't use a 7/8 Wilwood master pushrod with a 1". Why is honestly still beyond me... I was able to put about 50 miles on the car between last night and this morning. Damn it's hot, I need to charge the AC. The brake pedal is a HUGE improvement. It's the high and hard brake pedal I've been chasing since day one. During normal street driving it's very confidence inspiring. I tried to simulate race conditions and there is still knockback but not enough to require pumping the brakes. In fact, the knockback doesn't take me as far as the 7/8 pedal travel was normally. Clearly I need to get this car on the race track but I'm a happy dude!

This was the first real drive with the new BFG KDW's. I'd say they are noisier than the R888's. The feel of the car is slightly different but nothing I can't tune out. I was able to punch it in 2nd gear at the lake and it hooked. That's a good sign.

**Matt@BOS** · #2 07-16-2010, 10:38 AM

Glad to hear the new setup is working for you. Just curious, but how much pressure do you have to apply to the pedal to get the thing to stop? Do you have to stomp on the pedal more than with the 7/8" or about the same, save for the fact that the 1" doesn't have that squishy feel towards the top of the pedal.

Also, I've got a random question for you. Did you use the DSE half height body mounts? I ask because because my car is sitting so damn low it is getting impractical and its near impossible to twist the coilovers up any farther.

Matt

Teetoe_Jones · #3 07-16-2010, 11:22 AM

Quote:

Originally Posted by 69MSA

Also, I've got a random question for you. Did you use the DSE half height body mounts? I ask because because my car is sitting so damn low it is getting impractical and its near impossible to twist the coilovers up any farther.

Matt

He did. He won't again. It causes.... Issues.

Tyler

Vegas69 · #4 07-16-2010, 12:42 PM

I like it alot better so far. If I we're to guess, the pedal is about 15% -20% harder. Let me get a race and more miles under my belt. The pedal ratio is 12:1 for a manual brake set up in a 69. Most reccomend a minimum of 8:1 for a manual set up with the proper master cylinder. I personally feel the 7/8 is undersized for the caliper piston volume. I wish I would've done this 2 years ago.

Tyler is correct, I did use them. Thanks Frank.

My only regret at this point is not slicing the tunnel for more trans to tunnel clearance. When I had the old steel block in the car I also had the coil over adjusters as high as I could physically get them. (Small block springs) I was able to back them down a turn or two for the aluminum block. I thought them LSX motors were light?

**tones2SS** · #5 07-16-2010, 03:23 PM

Very cool Todd!
Congrats on the ink!

**GregWeld** · #6 07-16-2010, 09:22 PM

Good to hear Todd!

Funny -- when we were at RTTC -- I talked for awhile with the Wilwood rep there. His statement rings very true - which was - "some people really like a high hard pedal a 1" M/C gives and some like the softer more modulated feel of the 7/8". He said he personally liked the "feel" of the 7/8... but it doesn't matter as well as it's what YOU like!

Vegas69 · #7 07-16-2010, 09:25 PM

I don't have any choice if I want a decent pedal. Yes, I like it very much.

This whole big lip, 335mm, race car, blah, etc, blah, forces it. Most guys can get away with murder. I can't because I push the limits!

awr68 · #8 07-16-2010, 10:06 PM

Quote:

Originally Posted by Teetoe_Jones

He did. He won't again. It causes.... Issues.

Tyler

Yep! Me too! Had to raise the trans tunnel .75" to fit the T56......

awr68 · #9 07-16-2010, 10:07 PM

Glad you are finally feeling better about the brake system Todd...these things can take some time!

**Matt@BOS** · #10 07-17-2010, 08:02 AM

Quote:

Originally Posted by Teetoe_Jones

He did. He won't again. It causes.... Issues.

Tyler

I nominate you for understatement of the week, sir. every little issue I have now seems to be related to those stupid bushings. They do make the car look very cool though.

Todd, apparently my little LS is more of a boat anchor than your ZL1. I'm currently shaving fiberglass off of Tyler's prized inner fenders when going around hard turns. Maybe I need to make an upgrade in the engine department, hell the sound alone would be worth it.

Matt