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View Full Version : People with running LS3/525HP swaps...come on in...


andrewb70
08-19-2015, 01:08 PM
I know that some of you have the LS3/525 engine that are hopefully on the road.

If you do, does the engine have the typical LS "sewing machine" valve train noise?

The reason that I am asking is that I have an ASA cam (same as the LS3/525) in my 5.3L and I am having all kinds of valve train noise. I believe the ASA cam has a slightly reduced base circle, but GM ships the LS3/525 with stock pushrods, so the base circle may not be reduced after all.

Thanks...

Andrew
71RS/SS396
08-20-2015, 01:28 AM
I know that some of you have the LS3/525 engine that are hopefully on the road.

If you do, does the engine have the typical LS "sewing machine" valve train noise?

The reason that I am asking is that I have an ASA cam (same as the LS3/525) in my 5.3L and I am having all kinds of valve train noise. I believe the ASA cam has a slightly reduced base circle, but GM ships the LS3/525 with stock pushrods, so the base circle may not be reduced after all.

Thanks...

Andrew

You're going to hear more noise with the intake you have, it's basically acting like a megaphone.
andrewb70
08-20-2015, 06:00 AM
You're going to hear more noise with the intake you have, it's basically acting like a megaphone.

Tim,

Thanks for the input. It did occur to me that the intake and the fact that I have a hole in the hood might have something to do with the valve noise.

I guess I'll chalk it up to "performance noise" and turn up the music more...LOL

Andrew
71RS/SS396
08-20-2015, 06:25 AM
Are you bringing that thing to LS Fest?
andrewb70
08-20-2015, 06:43 AM
Are you bringing that thing to LS Fest?

Yes Sir! With some luck the new dog-ring T56 will get installed tomorrow.

Andrew
martZ
09-01-2015, 07:07 AM
Yes, mine has the valve train noise.
parsonsj
09-01-2015, 07:58 AM
My LS7 makes a whole bunch of valve train noise, and so does the Tommy Camaro (base LS3 with factory cam). I don't notice it on the Doc's Beast (LS9), but it has a pretty loud exhaust.
andrewb70
09-01-2015, 08:56 AM
My LS7 makes a whole bunch of valve train noise, and so does the Tommy Camaro (base LS3 with factory cam). I don't notice it on the Doc's Beast (LS9), but it has a pretty loud exhaust.

Maybe it is just the nature of the beast. I have the proper amount of preload on the lifters, so I don't see any advantage to getting longer pushrods to add even more preload. Besides, now that my transmission has a bit of whine to it, I barely notice the valve noise...LOL

Andrew