Re: Is fords 5.6L a 347 stroker?
I know this is a very old post but it is still referenced.
The 5.6L (5,605 cc) used in the AU T3 is a 342 c.i. engine. Essentially it's a 302 Windsor block (8.2" deck height) & the 5.6 litres of displacement was reached by just lengthening the stroke from the standard 302 c.i., 76.2 mm (3.0 in) stroke to 86.4 mm (3.4 in) stroke, the bore remains at the standard at 4.000" or 102mm.
This entails a unique crankshaft with a 3.4" stroke (1.7" throw/offset) hence requiring unique rods & pistons to ensure dimensions that do not push the piston beyond the deck or below the cylinder skirt.
There's a lot of engineering concepts way beyond this thread like Rod/Stroke ratios, Rod angle, Piston acceleration, Piston compression height, etc., all of which affect your max rpm, cylinder wall longevity, piston ring durability, etc., but this is what is commonly called a stroker engine.
The 347 c.i. is effectively the same as a 342 with a 30thou oversize bore (4.030) & the same 3.4" crank, same 5.4" connecting rods & same pistons (1.1" compression height/distance). This & the 327 c.i. (332ci w/ 30thou over) are the two stroker combinations achievable using a standard 289/302 Windsor block (8.2" deck height).
You can achieve 327ci, 342ci, 363ci, 376ci, 388ci, etc., and everything in between using a number of different crank/rod/piston configurations on purpose designed aftermarket 8.2" deck height blocks that can accommodate up to 4.155" bore & 3.47" of stroke for 376 c.i. or 4.2" bore & 3.5" stroke for 388 c.i. These are expensive to build due to the aftermarket components required & so are typically used for short duration applications like drag racing. You would require virtually a whole new EFI configuration to accommodate these puppies also, bigger FI's, high flow fuel pump, 90/105 MAF, TB, MAP, etc., then there's the ECU side of the house, dyno tuning. Will a BW tranny then be able handle the HP, what about the diff. But a 363ci hidden within an 8.2" deck height block in a late E-series or AU-series Ford would be very neat indeed & street-able if you had a wad of cash to spend. And maybe throw a supercharger on for good measure.!!
That's why the 327/332 & 342/347 are the value for money, popular strokers out there. You can regrind a 351 crank, use a standard block, aftermarket rods & pistons & away you go, easy & cheap.
Hope this helps somebody.
FYI - the 351W has a 9.5" deck height & other unique characteristics, some pointed out in the thread above.
1972 XA GT351 Coupe [RPO83] - (1 of 259), 1997 EL GT- (1/240 AU Production Models)
2000 SVT Cobra R - LHD (1/300), 2003 SVT Cobra [10th Anniversary] - LHD (1/242) 330rwkw
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