96lt4c4

iTrader: (5)

Helps calm the nerves....from running a new motor.

96lt4c4

iTrader: (5)

Man, hate to hear that I don't see how I crimped the crap out of that thing. The hose was already on the pump crimped.

BoostinIx

iTrader: (7)

Haha. I know that feel. "This MIGHT explode...". Feel like a mad scientist developing a new bomb. Lol. Not looking forward to starting my LS rebuild, get to experience that all over haha

oakley6575

iTrader: (3)

Sounds pretty good man! Did you use the comp tool to get the correct pushrod size?

96lt4c4

iTrader: (5)

I have a Trick Flow adjustable push rod, I am not sure about the tool you are talking about. I am running 7.375 long push rods. Its about 2 full turns to 22 foot pounds, about .100 preload. I checked it with a dial indicator. Maybe too much preload? I did check to make sure the top of the motor was getting plenty of oil, and it is. I pulled my oil fill cap and looked in the cover with a flash light, I could see it pumping oil at idle, it slung it out of the hole when I reved it. Its loudest at full operating temp.

I have been tuning on it the past couple nights. I am getting there. Idle tuning is a bitch. It is pretty rich. I drove it tonight and saw about 10.9:1 AFR on my wide band during WOT.

oakley6575

iTrader: (3)

Why did you want to run so much preload?

96lt4c4

iTrader: (5)

Heard and read that with more preload, they will make less noise.

Gray86hatch

iTrader: (83)

That is to much imo.

I run 3/4 turn they make a little noise at idle but rev well.

Tim

oakley6575

iTrader: (3)

I also think it is too much preload. I always shoot for .075" with the LS7's. What lobes does your cam have?

96lt4c4

iTrader: (5)

Comp XFI Intake lobe number 3018 - 242 /.621
Comp XER Exhaust Lobe number 3658 - 250 / .595

Do you guys have custom push rods made? I am running BTR push rods. He has them made in .025 increments. I got two sets from him, 7.350 and 7.375. I went with the 7.375 to run more preload. I don't remember what I was getting with the 7.350's but remember thinking it wasn't enough preload. Buy doing the math it should come out somewhere around .075. But for some reason its seems like I remember it being less than that.

The lifter's don't seem to get loud until its all the way up to temp. It seems to be related to the oil temp, it wont get that loud just sitting idling. I have to take it out and drive it, beat on it, to get the oil temp up. Then they start to tick pretty good. I checked oil flow up top with it really good and hot yesterday, ticking, and there is plenty of oil coming out of the rockers at idle.

It does not seem to be effecting the way it runs though, the thing is pulling like a freight train.

oakley6575

iTrader: (3)

Those lobes are going to be noisy no matter what you do. They slam the valves closed which causes the noise you hear. But you could swap to the smaller pushrod and see if it helps any. Worth a shot

96lt4c4

iTrader: (5)

I was afraid of that. Wonder why it gets louder when it gets hot? I was listening to it today and almost think I may have a header gasket leaking. The noise is louder in the drivers side wheel well. Almost sounds like a squeak. I have a mechanic stethoscope and cant really pin point it. If I listen to it without the scope I can hear it, pretty loud.

96lt4c4

iTrader: (5)

Put some miles on the car this weekend, doing some tuning. Trying to dial in my VE tables. Got my AC charged back up, and it works great. I am going to start trying to dial in my MAF next.

I pulled the drivers side valve cover and could not find any signs of a problem. I put every cylinder at TDC on the base circle of the cam and did not have any loose rockers. I did recheck preload on a couple, with a dial indicator, and I was getting about .095.

It seems like the drivers side is louder than the passenger.

KCS

iTrader: (20)

It's odd that you get that much preload with 7.375". Are you sure you're on the base circle at TDC and not on the overlap phase?

96lt4c4

iTrader: (5)

Exhaust valve opens then closes, intake opens then closes as the piston is coming up to TDC...Yes ....No?

The rockers are parallel, and have no load on them.

96lt4c4

iTrader: (5)

Could try this method just to be 100% sure.

Jimbo1367

NOTICE how Comp has their newish rockers on the LS engine. I've only heard/seen one LS engine with these. Too bad they appear to be too heavy for us.

oakley6575

iTrader: (3)

I've always used EOIC. It is pretty simple

96lt4c4

iTrader: (5)

Well, Brian Tooley was nice enough to let me borrow a set of 7.400 push rods that a customer returned. I am going to try more preload to see if that calms the noise down.

If that's does not work I have a set of his SLR lifters that I may swap in. He recommends running less preload with these. .025-.075. He gave me 2 more sets of push rods to try with these lifters. 7.325 and 7.350.

Hoping the LS7's quiet down, I do not want to pull the heads

He listened to the car and told me to run it....I am just ****...

totalchaos

iTrader: (5)

any numbers yet?