.Stage 2 LS Turbo Cam. 226/230 113+4, .600/.575 Lift i ordered one this morning for my lm7 5.3 . im gonna use a 7875 turbo .anybody else running this combo ? what size pushrods did you use ? what boost you running ? ets an mph an dyno numbers ?
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You'll have to measure for proper pushrod length.

 

I've heard of people using the "cheap" cams for 5.3L LS engines and re-using the stock pushrods.

for example "sloppy stage 1-2" camshaft is available on ebay for $225~ and should take oem pushrod lengths. They say...

 

i bought the pushrod measuring tool . im just waiting for money to oreder valve spring kit

 

what about lifters .are stock good enough ?

 

From what I understand. Yes many people re-use oem pushrods and oem lifters.
It depends on the cam lift and ramp rates, If you get a low-rate ramp and low lift the idea is to re-use all the oem stuff and save money.


however there are a variety of randomly dispersed cam bearing/lifter failures,
In my research (cam swap results and dyno numbers/idle quality) I found that something like 18% of all cam swaps result with some kind of tragic failure of the lifter or cam bearing.

I believe this mostly due to cleanliness techniques. A small bit of dirt or grain is enough to damage many oil system mechanical components.
However without truly knowing the cause. I would suggest a couple things,
1. remember to be ultra clean, wear gloves, treat the engine as a human body in surgery. don't let it open to the air long or at all even. Make every second count and keep everything spotlessly clean.
2. inspect every single lifter roller if you have them out anyways. And inspect every pushrod if re-using oem.
especially the ends, I see in some videos the ends of the oem pushrods get "balled up". I wonder if it is due to the aftermarket spring pressures.

Only time will tell because the research is vague. I am sure there were many failure un-reported, and many results left unsaid. Like somebody will do a cam swap then not post up any results for years. And never mention that the motor spun a cam bearing at all. You can't rely solely on statistics. So its up to us to try and make it last, then report if you can stomach to do so.

 

thanks kingtalon im going to wait till i have all my parts an do the cam swap an springs in one day . i plan on being very careful . an clean , im hoping sumbody thats installed this cam can tell me what pushrod lenghth they used . to get me in the ball park .

 

Get good pushrods. Stock are weaker and can have issues under high spring loads and also opening on exhaust side with high cyl pressure of a turbo deal.

 

yeah or i plan on getting strong pushrods . are new lifters a have to type thing when changinging the cam . i was trying not to tear this completely apart ?

 

Eh thats debatable. Likely stock ones are ok and if a later year motor it might already have the ls7 lifters which replaced all gm lifters. Cam lobe shouldnt be that aggressive so they probably would be ok.

Most of us around here tear down the stock ls motors to inspect bearings and do a refresh on the heads. New deck and valve job. Ls9 gaskets or similar for boost. All good insurance. At that point heads off might as well do lifters. But suppose you dont need to. As long as they arent vvt dod lifters

 

THANKS MAN . ITS A BUDGET BUILD THAT I WILL LATER UPGRADE AN BUILD A ENGINE FOR . IM JUST TRYING TO GET IT RUNNING . ITS NOT GOING TO BE A DAILY . IM GUESSING 100 MILES AWEEK OR SOBASICLY ILL TAKE IT OUT AN PLAY WITH IT AN THEN TAKE IT TO THE TRACK SUM . JUST A TOY . MAY END UP BEING A SHOW CAR AFTER A COUPLE YEARS OF BEATING ON IT . IM FIFTY SO IM NOT SURE HOW LONG IM GONNA WANNA RACE IT . I MIGHT SKIP THE LIFTERS . JUS UPGRADE THE VALVE SPRMGS AN GET IT RUNNING . I THINK IM GOING WITH A EBAY GT45 BECAUSE OF COST . THAT SHOULD GET ME IN THE 10S I BELIEVE .THANKS AGAIN FOR HELPING OUT