LS vtec swap...

[mahdsports]

you can use the ls water pump, but it is not recommended. the gsr pump will flow faster. also when using the ls pump and timing belt, you may run into problems with the timing belt being too tight. yes, you can do it, but if it was the right way to do it, honda would have used the same belt and pump on all b-series engine, whether it is vtec or not.

[Vteckidd]

you can use the ls water pump, but it is not recommended. the gsr pump will flow faster. also when using the ls pump and timing belt, you may run into problems with the timing belt being too tight. yes, you can do it, but if it was the right way to do it, honda would have used the same belt and pump on all b-series engine, whether it is vtec or not.

while the LS pump CAN scavenge at high rpms, if your revving your stock LS block past 7800rpms, then you have more worries that a water pump POSSIBLY losing efficiency. you have to worry about rod stretch and spun bearings.

Honda never desgined a LSVTEC from teh factory, they never expected the LS block to be used as a VTEC motor, so its all about what you have to work with.

If your gonna do a built motor, use the VTEC timing components. if your gonna stay with a STOCK ls block, there is no use to change the belt and pump IMO. Not unless your due for service