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  #1 (permalink)  
Old 31 Aug 2016, 09:18 pm
jch jch is offline
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Default turbo piston choice

I'm new to the forum and really appreciate the atmosphere. Very open and helpful people. I just bought a non running 04 turbo lite touring edition. I am going to rebuild the engine and was thinking of using non turbo pistons. Any thoughts? I would use a forged set if they are available.
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Old 31 Aug 2016, 10:19 pm
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Default Re: turbo piston choice

Welcome to the forum
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Old 01 Sep 2016, 06:41 am
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Default Re: turbo piston choice

Not a good idea. The turbos have heavier internals than the non-turbos. I don't think the non-turbo pistons will hold up. I could be way off base here, but don't really think so, unless you don't ever get into the turbo. My question is why the hell would you even think of using non-turbo parts in a turbo engine? Is there something wrong with the OEM pistons? If not, put a nice cross hatch in the cylinders and new rings on the old pistons. Just be sure to clean them up first.
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Old 01 Sep 2016, 07:10 am
jch jch is offline
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Default Re: turbo piston choice

The non turbo engines have a higher compression rate than the turbos. I know I can always add more boost but since i'm rebuilding anyway why not up the compression? As far as durability I found forged pistons online that should be better than the stock cast pistons.
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Old 01 Sep 2016, 07:25 am
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Default Re: turbo piston choice

Just be sure to do your homework. What you're saying makes sense, but you may want to PM NitroPT and see what he has to say. He KNOWS what he's doing, no matter what some other folks may think. Dude is brilliant. He's earned my respect and that's not an easy thing to do.
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Old 01 Sep 2016, 08:18 am
Fk5 Fk5 is offline
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Default Re: turbo piston choice

Upping the compression in a turbo car just means you won't be able to run as much boost. You will also have to screw with the tune to get it to work properly. Pretty sure that the pistons in the turbo are higher quality than the non-turbo and I would look at that swap as a downgrade.

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Old 01 Sep 2016, 11:55 am
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Default Re: turbo piston choice

You can use non stock aftermarket pistons if you do your math. You may also notice that there is one big difference between the "turbo" pistons and the none Turbo piston. Hint ..its not the quality or compression.


I would actually recommend that you discus your engine rebuild with a Performance engine machine shop and not the internet forums.

I would post more information but I dont feel like arguing with member that have NEVER owned/operated an engine machine shop like myself.

Trust me on this one GET OFF THE FORUMS for answers!!!!
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Old 01 Sep 2016, 11:55 am
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Default Re: turbo piston choice

Quote:
Originally Posted by jch View Post
I'm new to the forum

WELCOME TO THE FORUM
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Old 01 Sep 2016, 11:56 am
jch jch is offline
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Default Re: turbo piston choice

After further research I believe that FK5 is correct. The computer would retard the timing so much I would lose performance. It's just hard to break old habits. I appreciate everyone's thoughts and look forward to asking more questions.
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Old 01 Sep 2016, 12:05 pm
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Default Re: turbo piston choice

not exactly accurate!!!!!

Do your math formula's!!!!

Look at the knock value limitation as well the PCM fueling and timing tables on a stock PCM.

Really I can't be any clearer to you what I recommend in my first response!

But I guess the other member will be more then happy to help you from this point on.


Good luck on your adventure!
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