Building an LS2 402...(RUNNING with Video)
Congrats! sounds like shes ready to rip, got-r-done in a timely matter too. As far as the fuel pressure goes you should have fuel pressure holding for a lot longer than that. Sounds like a bad check valve or your hose is leaking by the fuel pump that you installed, maybe need to double clamp it. Time for access hole 
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.
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.
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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.
Last edited by 96lt4c4; Jun 29, 2013 at 08:29 AM.
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
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.
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.
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.
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.
Last edited by 96lt4c4; Jul 1, 2013 at 02:29 PM.
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 ****...
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 ****...
