Originally Posted by
raiden571
why does it cost alot for ls/vtec. buy the head for around 400-600 pending on year, b16/gsr/type r. possibly have it milled if it isnt perfectly flat and check the block and make sure it doesnt need decked. if both your surfaces are good, you need a 150 lsvtec kit and your good to go.
i would recommend arp bolts and a type r/gsr oil pump to ensure longevity
What Lee said.
The whole point of an LSvtec or B20vtec is that it combines the long stroke and torque of the LS/B20 motor with the higher rpm capabilities of a vtec head. If you just throw a vtec head on a stock LS/b20 bottom end, you can't rev past 7k (and shouldn't rev past 6500 on a regular basis) without spinning bearings and destroying cionnecting rods. The vtec head only shines above 6k, so basically, you'd be better off just driving a stock b20 or LS motor.
In order to do a functional LSvtec/b20vtec, you need AT THE VERY LEAST to shot-peen the connecting rods and use ARP rod bolts... and that's if you want to go the chapest route. To have a motor that even remotely lives up to it's potential you'll need higher compression pistons (which for the b20, means aftermarket pistons)... at that point you might as well get better rods too, since even shot-peened, the LS/B20 rods were never meant to spin that fast.
So basically, if you want a good b20vtec, you need to tear down the motor and rebuild it with pricey parts. This is not your run of the mill honda motor... it is a project.
And in reference to the original poster: save your time and money and get a b18c.