Finished and at home

So I finally got my car back home this weekend. There is still body work and my interior to be done but overall I'm impressed. Here are a few pics.

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I took a moment to add in a heater core valve. How that got forgotten during the build is news to me but what ever 30 mins from start to finish and things were good. I'll just have to route a new push pull cable to the location that in needs to be in.

The only issue I am having is a high pitched whistle. It doesn't resonate from any specific place and is not the belts. It only happens when the car isn't hot. I'll jack it up and listen for it again in the morning but its certainly irritating as heck.

Awesome!  Enjoy

high pitched whistle may be from the oil filler cap...I've heard of ls engines whistling from there due to crankcase pressures etc...

nice looking vehicle!

Thanks for the comments guys, I will check the oil filler cap. I am wondering if the bearing at the flywheel could be making the noise. I am certainly hoping not but the whine is constant and doesn't fluctuate with rpm like something rubbing would.

If it is crankcase pressure, the issue may be with the PCV system. There's an inlet to the manifold, passenger side right behind the throttle body. This should have a hose to either the valley cover with the LS6 system or to the back of both heads with the LS1 system.

The car looks great!

Rich

So the newest development is my whistle noise is 100% engine pressure related. That thing has a serious strong vacuum.
It is hard to pull off the oil cap or oil dipstick while its running and once you get them off it sucks serious air through them, engine rpm rises a little and of course the whistle stops.
My old hondas would have positive pressure at the valve cover, and my Tahoe with an engine that is identical with the exception of stroke seems to be neutral on the valve cover pressure.

on my setup
the PCV valve at the back of the intake is capped.
the passenger side valve cover is vented to the intake manifold
the driver side valve cover is capped
the driver side intake port is capped

any opinions on that.

CALLED IT!!!

Honestly I have no idea what exactly will fix your problem...but I would start with looking around for a vacuum diagram for the engine (stock)...see if there is supposed to be a check valve somewhere or if a hose is on the wrong port etc.

Also see if you can find some information on how the PCV system on your engine works, that will help with diagnostics!

Good luck!
Ethan

If you open up one or both of your valve cover vent holes and plumb them back into the system your problem will be solved. See link below
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948 wrote:If you open up one or both of your valve cover vent holes and plumb them back into the system your problem will be solved. See link below
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Thanks 948 and Blue. I plumbed it all back in the correct way and just like that no more whistling or excessive vacuum on the system. So now that I have won that battle I've created another problem.

I've got a speed density tune on the pcm and now under heavy throttle she boggs. If I roll into it slowly she pulls like normal with no bogging. I'm gonna get it looked at but chances are I'll ultimately just go back to a MAF system with a VSS so I never have to worry about tuning changes again.

Welcome to my world...fix one thing and find another problem! I'd say MAF and VSS would probably make some nice additions in terms of driveability and power delivery with a proper tune...

I wonder if the crankcase vacuum could affect the tune...? I wouldn't think that it would make any difference  

glad you fixed the whistle though!!!

Good luck bud
Ethan

MAF and VSS here, never had an issue other than the car being a little cold blooded, but she sits alot. So I give her some slack when I start her for the first time in weeks...

docwyte wrote:MAF and VSS here

Ditto. Mine was tuned on an engine dino at the rebuild.

Rich

Rich L. wrote:

docwyte wrote:MAF and VSS here

Ditto. Mine was tuned on an engine dino at the rebuild.

Rich

I have to agree. For a street driven car only, some things are much better stock.

This weekend I'll take the time to trace out the appropriate wires in the harness and start getting it prepped to be wired in once the PCM is reflashed. Luckily I still have the MAF and pigtail. Just need to order a VSS kit from TPC. Speaking of wiring I did extend and move the OBD2 port into the cab. It was under the hood  Well just leave that in the pile of why did they do it that ways.

When I installed the VSS kit, I struggled to get my CVs to stay tight. The schnorr washers weren't on my car from the factory. This was the best information on the subject I could find.

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Glad you're getting it sorted.
Rich

My car is mostly a track car. The MAF and VSS just make the car better, period.