B20B

OK so I have been looking around on the net at engines.. and it seems that the b20b has a low compression then the b18b.. but how would you build a crv/vtec.. but since it has the lower compression I think that I would boost it.. If I were to boost it . what would I go with, a b18c1 head. but would that raise the compression alot..
need some help  

yea the b20 does have slightly lower comps i believe and to get the exact figure for compression you would have to take in account of all the components in the rotating assembly .. rod stroke ratio then ddome clearance in the cc's of the head.. you can always get a thicker head gasket or double two of them up.. and i never even thought of suggesting the b20 when you were askin bout turbo.. sorry bout that it just never hit *** and the cr/vtec is the same thing basically as the ls/vtec  

yes lude shame on you.. I think that the compression ratio of the stock crv is 8.5:1 but if I were to put the b18c head on there what you think maybe like 10:1 then if I got new pistons ( b16a right) and the vtec conversion kit. and about the connectiong rods .....
do these engines weigh alot.. like as much as a h22a.
thanks man..
I think I will go this route since i cn get this motor for like 500 less  

ooo noo i dont think any b series weighs as much as the h22 its a fat boy motor built for a fat boy car... as for a compression estimate since i dont know the exact rod stroke ratio for it i really cant give you a solid answer what i can say is with a 44cc gsr cylinder head combustion chambers id like to put it right around a low 10 with b16a pistons .. im gunna go crack some books and hit ya back with a better answer...  

ok sav here is what i got from reading a tec book i have..b20b cr is 8.8:1 awesome to turbo... i didnt do the math to find the compression after the b18c head is on because i found some problems that are more important at the moment... ok the b20b head has 31mm intake valves compares to the 33mm of the gsr head... what this means is you can still use the b20b pistons but the reliefs will be 2mm too small only giving you 4 degree of timing to advance!!! before piston impacts valve... now you have some options here you can have your b20b pistons machined to accomidate the 2mm difference and not have any issue's or you can go with oversized aftermarket b16a pistons for turbo.... you wont be able to use standard bore b16 pistons because they are 81mm perfewct for the b18 but the b20 has an 84mm bore ... you need a minimum clearance of 0.045 intake and 0.055 exhaust... also i found this site another kid used to reference his crvtec build i havent checked it out but here it his hope all helps!  

so If I were to get new pistons could I get them made with a bigger dish, but other then the piston fitting is it pretty much like a ls/vtec  

yup its the same process as the ls vtec only difference is the crvtec is a 2.0 ltr rather than the 1.8 ltr...about the pistons what i was sayin there is that the non vtec piston reliefs are smaller than the vtec piston reliefs thats why i was sayin you can have the b20b pistons machined for propper valve clearance or you can just swap them out for oversized b16a pistons .. or any vtec motor pistons