Eventually when I save enough money to do it I’m planning on building a high compression ls/vtec motor. I’ll be using a b16a head ITR cams, springs, retainers, throttle body, and intake manifold. I know a brand new vtec oil pump should definately be used. In addition I’m getting aftermarket rods, rod bolts, pistons, and balanced crankshaft. I’ve heard some people say that the ls/vtec is not as reilable as b18c motor. What else can be done to the bottom end to help make an ls/vtec very reliable? Is the major shortfall of the b18a block at high rpms its lack of oil delivery? There are many very intelligent people on this board who I know can help me with some answers. Thanks.
If you put in a full vtec oil system, with the additional squirters under the pistons, you should be fine.
theres always a debate on oil squirters. Its why so many Don’t go ls/vtec or b20/vtec. Oil squirters are not needed.
They’re in the block for ‘cooling’ not lubrication. They squirt oil up at the piston skirt, they do nothing in the way of lubrication. Oil squirters are not needed unless you plan on running at extremely high rpms for long periods (i.e. road race). Pistons can overheat, which means more damage, wear, more chances of detonating…etc. Oil, which is still hot but cooler than piston, is used to stabilize the temperature.
Re: built b18a block; oil flow prob. at high rpms?
Originally posted by Ghost G2
What else can be done to the bottom end to help make an ls/vtec very reliable? Is the major shortfall of the b18a block at high rpms its lack of oil delivery?
One thing you can do to improve oil flow is by replacing your oil pump with the itr oil pump. It bolts right up except you need to trim the lower timing cover