Stock valves
I think it's a good practice on a higher HP car. I know there are a lot of guys out there running completely stock cylinder heads like 317's with stock valves, but I did it on my engine for the peace of mind.
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I have had a stock valve and last weekend a stainless vavle go away.. I race a lot more than most but I am going to Inconel this time.. I could do ti but no one has said weather they handle heat better or not..
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I've run 25+ lbs on 5.3's and 4.8's with no issues. 706 heads, 317 heads, 243 heads. (running E85, water inj, and an A2A IC as well) Pretty cheap "upgrade" though. If you have a nice motor I'd go with stainless. If your running a JY SBE motor I wouldn't worry about it.
I've run 25+ lbs on 5.3's and 4.8's with no issues. 706 heads, 317 heads, 243 heads. (running E85, water inj, and an A2A IC as well) Pretty cheap "upgrade" though. If you have a nice motor I'd go with stainless. If your running a JY SBE motor I wouldn't worry about it.
If you're going to slap a 200 dollar motor in your engine bay, don't worry about it. If you're building a nice 8-10k+ motor, upgrade the exhaust valves to stainless.
Up to you… you know the risks now. Personally I’d just run a “safe” low timing/rich tune until I could afford the new heads. I've seen very few dropped valves on turbo motors that weren't pushing the limits.
I guess that this was the kind of response that I was looking for. Thanks. I asked because I haven't read about people replacing the valves or having issues with them
That's obviously not to say that it cannot happen though!
Good advice in here.
Normally we don't worry about the exhaust valve weight as the diameter is much smaller than the intake valve, thus the weight is normally much less.
Good point!
My cyl head guy gave me crap about not putting better exh valves in when he did my valve job.
But then he thinks I'm nuts for putting a big turbo on a stock engine anyway.
:-)
Ron
My cyl head guy gave me crap about not putting better exh valves in when he did my valve job.
But then he thinks I'm nuts for putting a big turbo on a stock engine anyway.
:-)
Ron
Idk if i want to put a good set of heads on this motor or do an aluminum 5.3 later so that i can REALLY lean on it and do a set on that. I'm worried about ballooning the Cyls on my LS1 with my boost level. My engine builder said that i might have to worry about it running around 23psi