LQ4 Rebuild for Towing
#41
Nope - didn't mill the heads.
In a way, i hope you're right about pushrod length. I dont think i want to know what the alternatives are.
I wonder - is the base circle on the cam the same on all the truck motors? 4.8 5.3 6.0....i thought they were, but if they're different, that might explain it - tsp bases their dynos on a 5.3 - so if a 6.0 has a larger base circle - then theres the problem, my pr's would be too short...
Tsp actually states you can use your stock pr's on 212/218 low lift cam - but dont list compatible engines....
In a way, i hope you're right about pushrod length. I dont think i want to know what the alternatives are.
I wonder - is the base circle on the cam the same on all the truck motors? 4.8 5.3 6.0....i thought they were, but if they're different, that might explain it - tsp bases their dynos on a 5.3 - so if a 6.0 has a larger base circle - then theres the problem, my pr's would be too short...
Tsp actually states you can use your stock pr's on 212/218 low lift cam - but dont list compatible engines....
#42
Nope - didn't mill the heads.
In a way, i hope you're right about pushrod length. I dont think i want to know what the alternatives are.
I wonder - is the base circle on the cam the same on all the truck motors? 4.8 5.3 6.0....i thought they were, but if they're different, that might explain it - tsp bases their dynos on a 5.3 - so if a 6.0 has a larger base circle - then theres the problem, my pr's would be too short...
Tsp actually states you can use your stock pr's on 212/218 low lift cam - but dont list compatible engines....
In a way, i hope you're right about pushrod length. I dont think i want to know what the alternatives are.
I wonder - is the base circle on the cam the same on all the truck motors? 4.8 5.3 6.0....i thought they were, but if they're different, that might explain it - tsp bases their dynos on a 5.3 - so if a 6.0 has a larger base circle - then theres the problem, my pr's would be too short...
Tsp actually states you can use your stock pr's on 212/218 low lift cam - but dont list compatible engines....
The base circle is smaller on aftermarket cams in most cases. Why this is I have no idea. I think when TSP says you can run stock pushrods, I think they mean you don't have to by hardened chromoly pushrods. I don't think they mean length. But I really think you'll be fine running it like that. The LS lifters have a lot of wiggle room when it comes to preload. They'll just be a little noisy. Research LS and sewing machine noise, and you'll see this is a common complaint. To make it quiet like stock takes playing with pr length. And what works for one guy, doesn't always work for the next guy.
I'll take a video of my truck tonight. When I get the phone closer to the engine you can hear the same noise, just a little bit quieter than yours.