M50 stroker kit from zionsville

[RobPatt]

What are the downsides of this kit... for the M50TU?
Would the engine have to come out? Might be neat to do along w/ S50 cams.
I don't know.... that's why I'm asking! Thanks!
Rob sends.....
------------------------$500---------------------
BMW M50 engine "2.8 liter stroker kit" including (1) crankshaft, (6) pistons, (6) wristpins and (6) connecting rods. This is a "drop in" replacement for a 2.5 liter M50 engine but increases displacement by .3 liters and reduces the piston / rod weight by 67 grams per cylinder. Main and rod bearings are identical to 2.5 liter parts and the pistons are the same diameter. Using BMWs average horsepower / liter of displacement ratio, this change calculates to +22.5 horspower and 22 ft lbs of torque. This kit runs great under the factory M50 management system. We do offer a software upgrade to maximize performance.

• E36 1992-95 325i, 1992-95 325is, 1994-95 325i Conv.
• E34 1991-95 525i, 1992-95 525it

[etcetera]

Engine would have to come out. $500 is less than I thought it would be. It's probably an offset ground crank with rods and/or pistons scavenged from other engines.

Basically your rebuilding the engine. You will want to check the condition of the cylinder bores. I worn you'll want to bore them oversize and get oversized pistons.

If my engine needed a rebuild I'd look into it, but it's alot of work and expense if everything runs great as is.

[repenttokyo]

pretty sure a stroker kit requires oversized cylinder bores....

[winfred]

i am betting it's just 328/528 m52 crank/rods/pistons, same bore with a longer stroke, should drop right in and work fine, another choice would be to find a m52b28 short block that the head has just been sold off of and stack your head on it, or get a whole m52b28 engine and drill/tap the extra coolant sensor hole in the head, and put your wiring and brackets/accessorys on it