hi im thinking about the plus 3 vitos crank..... will i need any modifications? and ill need to rejet to right? and will i notice a big difference?
+3 vitos stroker crank
- Thread starter 1994F150YFS200
- Start date
from what ive heard its a lot better to get it ported for the stroker crank once its installed to fully utilize all of the available power but alone im pretty sure it will make a difference but with porting for it it will be insane im not sure if you need to trench the case but i think its only for +4 strokers other than that it should bolt on but with porting for it it will be insane
it wont srew it to hell dont be hating what geting the porting matched does is make it have more power u dont have to its just way better to do.
w8.... so if u get a +3 stroker its just a bolt on? i thought u had to have the head machined for the deeper stroke
not to sound like a d!ck but because the piston height of stroke is changing stock ports are going to be a little out and will need to be corrected, thus everyone saying to get it ported. not just for power but to put it back closer to spec. so it will probably cost you more than just porting and a carb which will be easier/cheaper route for more power.
and like stated, if you port it for the stock stroke, you'll need a new jug to port the opposite way to run with the stroker kit or it will run even worse than with a stock stroke bore if I'm understanding this right.
per example stock porting could involve lowering the exhaust port or intake port where the stroker kit will require raising. this is just an example I have no idea which way either needs to go this is just my guess. both could probably use slight widening and height from what I recall is what changes timing
and like stated, if you port it for the stock stroke, you'll need a new jug to port the opposite way to run with the stroker kit or it will run even worse than with a stock stroke bore if I'm understanding this right.
per example stock porting could involve lowering the exhaust port or intake port where the stroker kit will require raising. this is just an example I have no idea which way either needs to go this is just my guess. both could probably use slight widening and height from what I recall is what changes timing
not so ,it can be done either way with good results . in my experiances your best mid-top power is running a spacer (not a vitos one though) on +3 mill instead of a recessed head plus theres more volume and less heat ,dont forget the aluminum head and the cast iron liner have different thermal expansion rates .now on a banshee stroker the recessed head is better though because your trying to keep the pressure high on a parallel twin,as far as porting and durations ..yes it will be a mile off if it is not adjusted for the stroker crank
The one that comes with your crank. or whatever your engine builder recommends. they can change port timings and squish etc.
