I'm having a bit of difficulty with my brakes now after the 383 rebuild. The cam is the comp cams 224/236 114 lsa cam, runs good, idles at 850 rpm. At which point I see 8 - 10" of vacuum.

I have a bit of a soft pedal and it pushes through to the hard spot with out much effort and no hint of wheel lock up, in fact I need to push with just about all I can muster to get the some lock up.

Once going, I see around 15 - 16" of vacuum on deceleration and the brakes do perform better, though not up to what the brakes were capapble of before the new engine combo. Lock up is very difficult.

Brakes have been bled completely out to the four corners. Still not satisfactory.

Soooo .... anyone else out there running this cam, 224/236 on a 114 lsa need to run a vacuum canister?? Or, are we just having a lot of trouble getting the air out of the ABS box??

thx for any input

LWM

 

My friend Maldo had this same problem when we did his motor with the same exact cam. He bled the brakes at all four corners and the pedal was still kinda soft and he did not think it was too good, Then he pulled the car in and re-bled the brakes and it was much better (back to normal).

You should try re-bleeding the brakes again.

Hope that helps,
Claude

 

I am having the same problem, using the same cam. I have re-bled mine and the results were no better.
Scott

 

I have the same cam and I gert the same amount of vacume as you do. Although its alittle harder to lock the brakes up, it isne tthat bad.

95silvert/a:

Our club has met your freind Maldo and have welcomed him into the club.

 

Mine's fine, but it's on a 116LSA.

Rich Krause

 

Thats great. I heard you guys are having a F-Body meeting tonite, mabee one of you guys can talk him into putting the blower back on his car, now that he is finally settled in Florida.

If he does not listen to you, Race him after the meet....And put a couple of cars on em, I am sure that will get him thinking about putting that blower back on there

Wish I was down in Sunny Florida with you guys

Later,
Claude

 

Hi I also had the same problem … but I also upgraded to ls1 brakes… I had to bleed the system a couple of times before the brake pedal was normal. (no problems know)

Oh you also need to bleed the abs unit (it has two bleed screws if not the brake will feel spongy )



Maldo

 

Punk yeah I know .... i miss the boost ... but I could not trust myself to drive normal .. and did not wnat to chew up any parts before i got settled becasue i don't have any place to fix it

 

Excuses...Excuses..Quit Your Cryin
I dont have any place to work on my car either but the back of the apartment on my back (yeah....real redneck style) and I have to deal with the cold NJ winter too so I dont want to hear that

Put that blower back on there you Wuss!
And Go back to Enjoying Life

Later Broh....
Claude

 

Does a higher LSA mean more vacumn at idle??? I had comp grind mine on a 115 instead of 114. Combo told me I should see ~15 in/hg at idle. I don't know that for a fact because I haven't got the car running yet but I should know by the end of the week.

 

Yes, more LSA = more vacuum (all else equal). I doubt you will see 15in though. More like 12.

Rich Krause

 

Check for vacuum leaks. I have that same cam and it pulls 14" of vacuum at idle. Never had a problem with spongy breaks.

 

Damn CJ 14!, I dont come anywhere near that. I get about 11 with the car in neutral and about 10 in gear.

 

I guess you need to check for vacuum leaks also

 

Just got the car running last night and it makes 14 inches at idle.