2.8 conversion

[fast924S]

Hey guys I have a extra 85.5 944 enigne sitting around and I was thinking about slowly building a race motor with it. Does anyone know what is need to do a 2.8L conversion?? Any good links?? any ideas??

[Zlatko]

I think that powerhaus does this conversion if im not mistaken..

www.powerhaus.com

[Dantilla]

Make sure you read the rules for whatever race class you want to run BEFORE building the engine.

[gearhead290]

S2/968 crank makes it a 2.8 doesn't it?

[fast924S]

Im not to worried about the racing class, with the mods I have now Im already in the GT class

[fast924S]

bump

[idontknow]

PH 2.8L Kit: New 968 longer stroke crankshaft, 4 custom forged lightweight connecting rods (2lb lighter than OEM), lightweight custom 2.8 L Mahle 8.5:1 pistons & rings & wrist pins

Base Kit = Call
+ the following upgrades:
Customize the 3.0L crankshaft: cross drill rod journals, knife-edge & remove 8 lb., balance
Precision bore cylinder block to assure perfect piston-to-wall clearance (1st oversize bore)
Complete engine gasket set, with Wide Fire Ring head gasket and new head nuts & washers
Complete engine bearings: racing mains, connecting rods, balance shafts & oil pump sleeve
“O” Ringed cylinder head, valve job, new guides, valve springs, ported & polished (exchange)
8x new hydraulic lifters - must be replaced if not done recently, or on engines over 75k mi.
New timing belts, tensioners & rollers kit
New 3.0L water pump
New oil pressure relief valve & sending unit
Modify the oil pan & pick up tube to help prevent oil starvation to rod bearings (exchange)
All new water & vacuum hoses
3 Bar fuel pressure regulator
Clean, pressure flow & balance your OEM fuel injectors

Stolen from powerhaus.

[idontknow]

I wonder what's involved in putting in the 968/3.0 water pump.

I'll look up to see how much you need to bore the cyls.

[fast924S]

Yea It looks like a nice package, but I really dont want a CR as low as 8.5 to 1, Im thinking like 10.5 or 11.5 to 1, Its gonna be a NA so I need the CR for more HP

[idontknow]

Alright, did some math.

924S = 2.5ltr, 100b*79s
2.8 = 100b*88s
968 = 3.0ltr, 104b*88s

Since you have to overbore the cyls by 2mm (deep scratching you said), you are going to have a 2.9ltr engine using 88mm crank. You could have a 2.7 (2656cc) if you overbore to 103.5 w/ the stock crank. Do the work right and you can set compression up to 13:1.

Need more compression? shave the head back down. The 8.5 specs are on the idea you're turboing the motor.