can this be done?? I was thinking about it......instead of using a LS block with a vtec head thus creating LS/VTEC can i use a LS crank in my GSR block and keep everything the same but have the longer stroke with all the advantages of having a GSR motor lie oil squirters and oil pump. Will this crank bolt in and what bearings should i use the LS ones of GSR ones. If anyone has done this or thinks it might be possible let me know. Thanks

 

Yes it is possible.. Modifications to the block have to be done.... (notching)... If you wanna do a so called "LSVTEC" this is the way i would actually do it... I like the B18C girdle, and the internal oil feed.... You'll have to use LS length rods, and as for the bearing take the alpha code off the block and match it to the numeric code on the crank.... That will set you up with the right bearings... i.e. #1 D-2, #2 D-2, #3 D-3, #4 C-2, #5 C-3... you'll get something like that... When it come times to reassemble the block I would still plastigauge everything to make sure you are within spec... There's no reason to not do so and risk spinning a bearing or ruining the crank.... I personally don't like the oil squirters because all they do is make the rotational assembly unbalanced... Just slap some forged slugs in there and you'll be set... OE pistons work fine too... Good Luck

 

What do you mean buy notching?

 

I believe he's suggesting that you have to have material removed from the bottom of the cylinder bores to put the LS rods in. I don't believe this is accurate, but then I've never put LS rods in my GSR either. For all the work and expense this LS crank install in a B18C will require you'll pick up all of 37cc of displacement, increase piston speeds, and drop your r/s ratio to 1.54:1. Not worth it.

 

What about if the motor is sleeved?Someone told me that it would be a gsr block but more of like a b20 cause of the stroke of the crank and the big bore from sleeving.The gsr block also has oil squirters and the girdle which will help the vibrations.

 

If you had an 85mm b18c and replaced the GSR crank w/ the inferior LS crank(& LS rods) you'd pick up 41cc of displacement, it's not worth it IMO, stroking is a less effective way of increasing displacement than boring here as is almost always the case w/ Honda engines. Long stroke and high revs(Vtec) just aren't a very good combination too many negatives and not enough gains, again this is only my opinion, I know there are a great many people here w/ a love affair w/ frankensetups. Most people talk about these frankenmotors like they produce huge power gains over stock Honda motors...and they don't.