hey folks i was wondering if stroker kits were reliable. how much do they run for? if i do stroke a motor (b18c) would i need bigger interals too? much help needed soon. thanks

 

Not really. The best one I saw was from jun and for a b18 it was 6k+. And most of the kits you have to rebuild the motor after so many miles. I think the crower kit you have to get rid of the oil squiters in the cylinders. And it's not made for high rpm. And I believe the spoon kit had some similiar downfalls as well. It's been awhile since I recearched it though.

 

From what I have heard a stroker kit is only good for a trailered car a full race car. What happens is the stroke is increased so much that the rod accutally with try to push the piston thru the cylinder wall which in time will cause internal damage. I could be wrong but that seems to make some sense

 

evocelica is right. Most "stroker" kits don't help the rod/stroke ratio. They make it worse. If you can find one that has relocated the wrist pin upward, you may be on to something. Research man....
jg

 

Yeah, strokers can hurt N/A power if not built right, because it lowers the rod/stroke ratio. If you build the motor with one, you can't rev it as high because of the extra stresses put on the components. And revving is what all-motor is all about, the higher you can rev, the more power you get (given cams, valvetrain, and a head that will allow it). However, if you add a deck plate to raise the block and install taller sleeves to accomodate longer rods, a good r/s ratio can be maintained. A low r/s ratio isn't always bad; if you build a strong block with a purpose built head, one with smallish ports to raise air velocity, coupled with a long stroke to draw more air into the engine, you will have a killer turbo engine. The revs won't need to be high because it will be able to make great power within it's limit.

my 2 cents,
Greg

 

Umm... if it were true that N/A was bad with stroker kits, why is it that all the fastest N/A drag cars use stroker kits? No replacement for displacement. The fastest Honda drag engine is a Prelude 2.2 stroked out to 2.6, running 15:1 compression.

 

Yeah, the R&D motor is obviously stroked heavily because the block is notched to clear the rods, but the SCC article doesn't say what the bore is (nor does it tell the actual r/s ratio), that could be a lot of the displacement right there. The wristpin location could be moved up to give a higher r/s ratio. The redline of 9200 is not all that incredible, as fairly stock motors (with less than perfect r/s ratios) with the right valvetrain can make power to 8800 revs.

Greg

 

You got to remember we are comparing apples to oranges, I agree that if it is a drag car and you have lots of money and sponsors a stroker kit will be bitchen. On the other hand when you are self sponsored and are building your own car to daily drive and to some times drag I don't think stroking the motor would be a good idea, unless you have lots of cash and have no worries about having to rebuild or buy another motor.