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Engine - Turbo & Block Modifications and upgrades to maximize your Dodges turbo output & Improving strength and durability - pistons to crank.

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Old 12-04-2012, 12:08 AM   #1
Non-turbo pistons in a turbo motor (?)  
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Just bought an 85 Daytona turbo for a song. Has a new long block but a messed up head gasket. (Genius used silicon sealant when installing it) Replaced the gasket and noticed that the pistons were not dished pistons, but are stamped with .050 in. and the pistons do have valve reliefs. Do I need to be concerned with the compression being too high, or does the larger bore and running premium fuel make up for the difference. The head does have the stellite valves btw. Any info would be appreciated. Thanks in advance.

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Old 12-04-2012, 12:22 AM   #2
Re: Non turbo pistons in a turbo motor  
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that is a tricky one. The 85s had a tiny little dish in them, not much. Do a static compression check. Shouldn't be over 130 for static and boost. The 8.5 engines 86 up are about 125
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Old 12-04-2012, 11:09 AM   #3
Re: Non turbo pistons in a turbo motor  
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Here is a pic of the pistons.

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Old 12-04-2012, 05:50 PM   #4
Re: Non-turbo pistons in a turbo motor (?)  
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Not for sure but I've never seen TBI pistons like that in a 2.2. They look like2.5 pistons to me.--Check the stroke. Move a piston to the bottom and measure how far down it is in the hole 4" or so its a 2.5 the 2.2 will check out to about 3 3/4
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Old 12-04-2012, 06:13 PM   #5
Re: Non-turbo pistons in a turbo motor (?)  
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Now is the time BTW, engine still new, to buy just pistons and plop them in there. Otherwise the NA pistons could fail. They fail quikly detonated.
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Old 12-05-2012, 05:59 PM   #6
Re: Non-turbo pistons in a turbo motor (?)  
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Sorry... Had some incorrect info on that first thread. Pistons are stamped with ".5mm". The head is already back on, so I can't measure the stroke, but I'm 99.99% sure its a 2.2L not the 2.5. Ive been looking around for another set of pistons, and ebay is the only place I can find em! kinda weary about gettin' em there though.
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Old 12-05-2012, 08:52 PM   #7
Re: Non-turbo pistons in a turbo motor (?)  
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FWDPerformance sells Venolia forged pistons, TurbosUnleashed sells Wiseco forged pistons for our cars. I bought mine from TU. Haven't run them yet but they are very legit, comes with the ring kits too.
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