Ok Im thinking of doing Ls Vtec turbo with a B16a head and either a B18a1 block or B20 Ls block. I was thinking of sending either block to get bore for bigger low comp pistons. What piston size you guys recommend for it and if its a good idea? Im gonna rebuild the head and put on OBX Third Stage Camshaft. thanks!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hondaswap &raquo;</TD></TR><TR><TD CLASS="quote">Ok Im thinking of doing Ls Vtec turbo with a B16a head and either a B18a1 block or B20 Ls block. I was thinking of sending either block to get bore for bigger low comp pistons. What piston size you guys recommend for it and if its a good idea? Im gonna rebuild the head and put on OBX Third Stage Camshaft. thanks!</TD></TR></TABLE>

--- First of all.

B20 = CRV
B18a1-b18b1 = LS

If you get your block bored out. You will need custom bottom end work because you can no longer use OEM sized thrust washers. I honestly would tell you to use the b20 bore size. If you get b20 block, just keep that. If you use a b18 block, get it bored to b20 specs. The only thing i will warn you about is. With a smaller block wall size comes greater chance for failure. The thinner the weaker really. Only get it bored if you really must/want to. If not, no reason spending that money to get the custom work done. You could be putting that money to something else. Also. Instead of investing in OBX cams, i would try to get ITR/CTR cams. Exhaust being the most important one of them both.

In my personal build i have full gsr set up with ls crank, eagle rods, and cp pistons (lowcomp). All on the oem 1.8l bore. I prefer to keep it at that because my goals are only 350-425whp. So no real reason to go get it bored. If i keep the block at stock bore, that keeps all the assembly with-in my skill level and know how. Once i cross that though, i could always run the chance or at least heighten my chances of messing up because of inexperience. Head work is the goal to make power in any type of build. IMO.

 

why would you have to use different thrust washers if you bore out the cylinders

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by superfast666 &raquo;</TD></TR><TR><TD CLASS="quote">why would you have to use different thrust washers if you bore out the cylinders</TD></TR></TABLE>

--- You wouldn't. I'm a goof ball and was thinking main bearings.

 

oh i didnt know either way just thought i would ask