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Old 03-30-2012, 10:41 AM
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Join Date: Apr 2005
Location: Central PA
Posts: 127
OM603 Turbo pistons and rods in OM606 N/A

Title says it all.
I've searched this and other forums and can't find the info.
Will the OM 603 turbo pistons and rods work in the OM 606 NA block?
The N/A already has the squirters, and my understanding is the pistons and rods are the weak link.
I have a 606 N/A, and have located an '87 603 core, from which I've already liberated the turbo IP...
Any info or BTDTs would be much appreciated.

I'm also looking for a 606 exhaust manifold, if you can tell where this is going..
Best regards,

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Old 05-17-2012, 01:22 PM
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Old 06-13-2012, 02:11 AM
auspumpen's Avatar
Weit aus dem nirgends
Join Date: Nov 2008
Location: Östfalia
Posts: 319
Perhaps if you bolted a 603 cylinder head on that block. There's no way 603 pistons will work with a DOHC head that places the prechamber into the center of the piston. Don't know about the rods, though. Probably best to just turbo the NA and keep boost and fueling at a reasonable level.
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Old 08-02-2012, 11:54 PM
Join Date: Jun 2012
Location: Virginia
Posts: 790
is the compression ratio the same for the non-turbo vs. turbo 606?
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Old 08-03-2012, 05:34 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,799
Besides prechamber tip location, the 603 piston is notched for 2 valves while the 606 piston is notched for 4 valves. You might be able to machine the 603 piston for proper clearance. You're likely better off paying $3000 or whatever they want for a 606 turbo engine.

87 300D^2
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Old 10-05-2012, 09:47 PM
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Join Date: Jul 2009
Location: Foresthill
Posts: 212
iI just read about this use the 606 rods and the 603 piston I think. If you want iI can look forthe link. e

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