stroker questions...

[351wStang]

just out of curiosity what is the stroke on a 306? or is that just a bored 302? stock stroke on a 302 is 3.00" correct? and what is the stroke on a 331? or is that just a bored version of the 327cid 3.25" stroke kits i see in summit? i know a 347 is a 3.40" stroke. and what do yall think would best fit a every day driver? i know 347 seems to be a big jump on a every day 302 but ppl drive 351 windsors everyday and they have a 3.50" stroke. only reason i ask is because a friend of mine told me i could have a motor and he has plenty of 302s in his dads junkyard. just gotta drive about 6 hrs for it. im sure my dad will love coming home to a 302 sitting on the vacant engine stand while my 351 is off at the machine shop. i still have to find a vehicle for the 302 LoL.

[boosted331]

A 306 is a 302 bored .030 over. A 327 ford stroker kit is either a .030 over block and a 3.2" crank, or the stock 4" bore and a 3.25" crank. A 331 stroker kit is a .030 over block and a 3.25" crank. Yes, a 347 uses a 3.4" stroke and there are a lot of people who daily drive 351W's with a 3.5" stroke, but the 351W has 1.3" more deck height and the piston pin is in a good location. In a typical 347 with a 3.4" crank and a 5.4" rod, the piston pin is pushed up into the oil ring which can cause you to burn oil and the motor won't last as long. Only kit to solve this problem so far has been the CHP kits using a 5.315" rod.

[351wStang]

does useing the shorter rod end up giving you less compression or is the piston pin just lower in the piston? i assume its a whole new design in the piston to keep the pin out of the oil ring making it maybe a taller piston?

[boosted331]

Originally Posted by 351wStang

does useing the shorter rod end up giving you less compression or is the piston pin just lower in the piston? i assume its a whole new design in the piston to keep the pin out of the oil ring making it maybe a taller piston?

Using a shorter rod usually means moving the piston pin lower down in the piston to keep it out of the oil ring. If the dome or dish volume is the same on both pistons, the compression will be the same.