I was wondering what you guys thought about stroker kits? How much do they typicaly cost? What are the drawbacks and benefits.? And will this increase my safely allowed horsepower on my motor? Thanks guys
Yeah, I asked a question similiar to this. They can run $2k-$3k, just depends. But basically, without a S/C or turbo, you are not going to gain squat as far as horses go. More torque will be gained, not sure how much though? Like Tom said, more bore=more power.
The benefit of it is more toque and thats it. The drawdown is an unreliable motor that will normally last 12-15k. Remember our 281 Ci motors have the same stroke as a 351 ci motor. On top of that you want to increase it and create more work for it. That is why the motors dont last.
A big bore kit(need to be done with an aluminum block which can be had for 300 bucks. The big bore kits unshroud the valves in the cylinder heads and allow more power to come from the engine and they are reliable and in general last longer than the strokers.
If the statement is true about how long they last (12-15k), I would venture to say its due to the longer stroke and has nothing to do with whether or not the internals are forged.
Forged doesnt have anything to do with it. The fact is you have a stroke on a small engine(4.6L 281 CI) the same size if not bigger, than a stroke on a bigger engine(5.8L 351 CI). Now you want to increase the stroke? Many are not to keen in the piston speed and instability. They are wroking too fast for the application. Plus it screws-up an already jacked up rod to stroke ratio. That is what causes the motors to fail.
Hope this helps. The stroker kits will not yeild that much power. Yes you will get low end torque but will see better numbers with a big bore kit and the motor is more stable internally.