100 Mile Motor Help
PRC Heads Thanks for all your help guys! I appreciate the honest feedback. I will post some pics once the car lives again.
TT
No, if it gives stock PtV at 62cc, you're only losing .011" of clearance with the thinner gasket. I have a .040" gasket. That's not the problem.
Either the Tsunami has almost 0 PtV clearance on a stock motor, the heads don't have anywhere near that much clearance, or the cam was installed wrong (or ground wrong). Either way, that's why you measure.
Either the Tsunami has almost 0 PtV clearance on a stock motor, the heads don't have anywhere near that much clearance, or the cam was installed wrong (or ground wrong). Either way, that's why you measure.
No, if it gives stock PtV at 62cc, you're only losing .011" of clearance with the thinner gasket. I have a .040" gasket. That's not the problem.
Either the Tsunami has almost 0 PtV clearance on a stock motor, the heads don't have anywhere near that much clearance, or the cam was installed wrong (or ground wrong). Either way, that's why you measure.
Either the Tsunami has almost 0 PtV clearance on a stock motor, the heads don't have anywhere near that much clearance, or the cam was installed wrong (or ground wrong). Either way, that's why you measure.
And to say those valves were 'hitting' the pistons is an understatement! I can't believe it ran as long as it did. I can't believe anyone would assemble an engine without checking PTV. It really doesn't take long at all.
That said, sorry to hear about this OP, that's a heck of a loss especially after doing all that work to install the parts and engine.
It's a tough loss OP, but it's a great learning opportunity. No engine combination is exactly identical....everything has tolerances. While parts may bolt on, they are certainly not "bolt-ons". There are implications with nearly everything when building a motor, regardless of what a vendor says. Unless they blueprinted it and have the documents to prove it, I would still check everything.
Measuring / blueprinting an engine is absolutely critical if you want it to last. Worst case scenario, you waste your time and find that everything is in specification, and you sleep peacefully at night. By going down this road, you learn about the intimate workings of your engine and you save yourself countless energy/time/$$$$ down the road in repairs.
If you have questions, don't be afraid to ask. This is what this forum is for. There are many many knowledgeable guys on here to help you out.
Here's to a speedy recovery
Measuring / blueprinting an engine is absolutely critical if you want it to last. Worst case scenario, you waste your time and find that everything is in specification, and you sleep peacefully at night. By going down this road, you learn about the intimate workings of your engine and you save yourself countless energy/time/$$$$ down the road in repairs.
If you have questions, don't be afraid to ask. This is what this forum is for. There are many many knowledgeable guys on here to help you out.
Here's to a speedy recovery
this is what I do with my build, I re-did my oil pan 3 times just to make sure it was done right because I wasn't satisfied with it when I let the first person do it for me..
I know...but I didn't want to be rude and say something like..."Ray Charles could see those pistons were hittin' the valves".
And to the OP...I really am interested in finding out what caused your carnage. I'm about ready to install a used Z06 cam in my 5.3...I WILL be checking PTV clearance. (I wasn't going to before your post.)
OK folks, lets chalk this up to inexperience and relying on everybody else (component sellers) saying "sure, it'll work/fit/not hit"
Expensive lesson for the OP and we can all take away from all this is the importance of test fitting and measuring parts and assemblies.
Expensive lesson for the OP and we can all take away from all this is the importance of test fitting and measuring parts and assemblies.
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Checking PTV TT
Interesting Devlopment I took a picture of this. I ordered a Tsunami on 111 LSA. The cam has two makes on it. The one is for a Torquer V3 on 114. On know cams can be reground. Did not think the LSA could be chaned?
I watched the video on Comp Cams site multiple times. Used a checker. Verified pattern on top of valves using a black marker and rotating the crank. Removing the rocker and checking the wear pattern.
I thought the same thing about them being too long. The stock 7.40's were way loose. 7.45 still had slack when the bolt was tightened.
I thought the same thing about them being too long. The stock 7.40's were way loose. 7.45 still had slack when the bolt was tightened.
This is horrible...but like already said, you never trust anyone's word when assembling an engine. ALWAYS check your clearances. What fits on one, may not fit on another. It's purely obvious you had PTV issues. The LS6 short block did not come with pistons w/valve reliefs, the cam made those for you.
Really unfortunate to learn the hard way. But there are post in this section every single day asking "do I need to check PTV" and "What length push-rods do I need"...The info is on here.
Really unfortunate to learn the hard way. But there are post in this section every single day asking "do I need to check PTV" and "What length push-rods do I need"...The info is on here.