Quote:
Originally Posted by gofra
Thank you! How about overboring the original block + new pistons? As far as proposed alternative goes, let me see if I get this right:
I'm in position to acquire a B5234T3 engine (2001 from C70T).
- complete 850R head is a direct fit?
- 850R oil pump should be kept as it's better?
- all the sensors and original computer will fit?
- no need for new turbo as existing head can be used.
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get a 2002 or later 2.3 (02/03/04) the 01 rods and pistons are still 139.5mm with an ME7 version of the N motor piston, unless youre buying rods AND pistons, in which case it has the lighter crank then thats a good candidate.
i actually have 5x 147mm rods here i removed and replaced with H beams if theyre of any use if youre considering new pistons (not the worst idea tbh)
yes, custom pistons if you want over 420bhp safely (so the ringlands dont crack off) but stock pistons come in +0.2 and 0.4mm oversizes at about 90 pounds a piston.
yes, keep 850 oil pump
if you keep your 850 head yes the ignition bits wont need modifying
i just used an RNC prepped 2004 2.3 (rarest of rare - only occur within a 6 month range from what i can find) for my latest build, had it rebored to 82mm, had DP Engine Parts design me bespoke pistons, skimmed head, MLS S60R head gasket, kept the crank that came with the block as its substantially lighter than the N crank, new mains on the crank using block and crank code, and ACL race bearings for the big ends.
few pictures of the custom pistons attached