Lt 1 ??

[Cam]

Rich:
How about valve springs on the same engine? Without over revving in the water box, how many passes are they generally good for? Who makes a good tool for checking seat pressure at the track?
Thanks,
Cam

[NovaMan]

There are a couple nice valve spring testers in this thread:
http://classracer.com/classforum/showthread.php?t=6364

[Rich Biebel]

Originally Posted by Cam

Rich:
How about valve springs on the same engine? Without over revving in the water box, how many passes are they generally good for? Who makes a good tool for checking seat pressure at the track?
Thanks,
Cam

I have very little experience with stock diameter springs on hyd.roller cams. I only mention springs as it is one area that might need attention. My own LT-1 has about 60 runs on it and I have occasioanlly gotten the rpm a little higher than I would like in the water. My experience with the Moroso type spring testers is that you need to have checked a new one for a reference as the numbers you get will be lower than actual pressure seen on a bench tester like a Rimac. I am doing a little checkup now on my engine.....leakdown testing and some valvetrain checks. Mostly just looking to see how things are after a number of runs. Changing valve springs is a very easy task and one we pretty much had to do very regularly in the "old days". I am new to modern day "stock eliminator" and the parts and reliability of them is also new to me. I have Bullet springs on my LT-1 and have some other stuff on the shelf........Comp cams and another brand as well. Springs are cheap and I like fresh stuff...we have some races coming up soon around here and the air will be cooler and I have more gear in the car so I like to know it's good to go....

[Tom Turner]

I run my stuff 150 runs or so and then feel the need for some kind of plecebic repair to soften my guilt. I have always thought that my cars were more consistent with fresh engines but it probably had more to do with the density altitude in the Spring that anything else. I know some LT1 racers run 300 + without trouble and still run in the top half. Good maintenence and an air cleaner (a K&N of course) are probably key here.

[Rich Biebel]

I just did a leakdown test on my engine as well as check some valve springs. Leakdown was pretty good and in-line with what I was told about these blocks. Springs had the same pressure as when I installed them but I am replacing them all with another brand. TOM T. ....I bought one of those K&N direct to t-body filters but find I will have to modify the water pump housing to get it on. I need to block off the top outlet at the t-stat housing and weld in a hose adapter on the side. Is that the way you got one on your stuff?