b18 head on what bottum end?

[funkdaflex1]

hey i can get a b18 ls non vtec head from my budy and i want to know what kind of bottum end should i get i know a guy sellin a b16 bottum end. how well would that work out? its goin to be turbocharged to so if the compression ratio is goin to be different with different bottom ends does n e one know what it would be and this swap is going into a civic

[kittedb18bt]

well i have never seen anyone do that. tell us if it turns out (if this is the route u choose to go). the b18b head and block work very well for turbo apps. hope u get the ls tranny too: longer gearing=better use of turbo.
the rod to stroke ratio on the b18b block is ok, but the bigger displacement more than makes up for it. b18b=1834cc and b18c=1797cc. correct me if i am wrong here.
i would not purchase the b16 bottom end. now if u had the b16 head this would be a whole different story.

hoped i helped somewhat

chris

[91civicDXdude]

if you can find the head and block for cheap, i say go for it.

[civickiller]

i heard a rumor going around over here that a shop sold a kid a b16 bottom end witha ls head, never seen it but heard it from the shops good friend

[94tegRS]

put it on a b20 block, then turbo it.

[kittedb18bt]

it would be better to turbo a B18 over a B20 anyday. u cannot boost that much on the B20.

[94tegRS]

why? arent they the same thing besides a larger bore? same r/s ratio.

plus when you get a b20b, its already 8.8:1 so it will take la nice amount of boost.

[kittedb18bt]

the B20 block will make nice amounts of power, but not an insane amount like the B18. i have seen B20ss make 500 whp and B18's make 900whp. of course both of the engines were fully built and boosting like all heck. the B20 block is similar to the H22 block in the aspect of cylinder thickness. i do believe that u r correct, 94tegrs, the B20 is just a B18 block bored out. (84 vs 81mm i think.) i am not sure on the r/s ratio.


chris

[94tegRS]

so the thin cylinder wasll is the B20's downfall so it cant handle as much boost?, what about getting iron sleeves? with thye same mods and amount of boost wuold the B20 be more powerful though?

[kittedb18bt]

i am not positive. i just havent seen B20's with any head of ur choice on it making insane amounts of power. i dont know what it is. we need to get someone in here like "gsr" i believe he is one of the most knowledgeable guys in here.


chris

[funkdaflex1]

I was just thinking to myself what if i get a b18c1 bottum end or even the b16 if its works and to my advantage. will the head even fit up to my turbo or the piping to the throttle body like it will with a b18b bottum end. will it throw everyone out of wake if i dont get the b18b bottum?

[eckoman_pdx]

I am not sure bout that question, but there is a guyin jacksonville, Fl with a CR-V B20B in his Civic. He is running a Greddy Turbo kit with intercooler, a Nitrous Express Nter-Cooler system (shoots nitrious onto the intercooler to cool the intake charge and therefor gain HP, about 50-75 hp) and LS (B18B, same engine your head came from) Cams. Apparently the LS cams give the car more power than the CR-V cams, 7 hp on the dyno. Anyways, point is, he runs a12.7 quarter mile @ 109 mph, and thats a fully loaded show car, custom interior, custom bodywork, decah VDC kit for the doors. The enigne puts out 297hp and 312 lb-ft of torque in that set-up. So it is possible to get power and speed for a B20B set-up. The article on this guy and his car is in the June 2003 issue of Honda Tuning. He said the Low compersion made was ideal for the turbo set-up, and the B20B provided more Torque (due to the larger displacement). The B20B, with no turbo, gives you about the same HP as a LS, maybe alittle less without the LS cams in it, but it gives you a little more torque, 133 vs 127. I suppose it is multiplied once you boost it. I still like the LS better, thats what I have a 97 B18B1 LS swap. Both the B18B and B20B give you fairly ow compersion, although the B20B is lower. I know the LS tranny's long gear ratio's are supposed to be good for turbocharging as well.

[HCB20Turbo]

I would like to inform you guys who say that the CRV block is not as stong or a good block for turbo applications; its aprox 1/8" thicker than a H-series motor. Same stoke as an LS and a great block to use. Come find me when my B16/B20 motor is complete. I promise you will learn something. Time, $, correct measurements & the right parts working together makes a fast car. Not what has already been done or been suspected. This post is to inform the first post "member" that the CRV block is just fine, but use a Z10 Block Girdle when building the motor.

Tyler

[funkdaflex1]

Would a b18c1 block be n e different than the b18a/b block??? what would be the compression with each using a b18a head and the r/s ratio which is better or would the b20 be a good idea in looking into and I should be able to use my turbo kit i have no on these motors whichever one i choose right?

[elitefreke]

here is a link for info on most honda motors:
http://www.performancesupply.com/integraswap.htm
hope it helps some on your build.