Such thing as reliable LS VTEC?
 

I just wanted to know before i go out and buy a GSR swap. Since obtaining a LS block and VTEC head is so much cheaper. So my question is that will LS VTEC engine last after a period of time? Or do i have to properly build it with sleeves, pistons, rods,etc...?

Re: Such thing as reliable LS VTEC?
 

ls blocks require work rod bolts,vtec water oil pumps and so forth

Re: Such thing as reliable LS VTEC?
 

no my question is how reliable are LS VTEC? Not what part is needed. Since I read alot about LS VTEC and how they are not meant to have longevity. And another fine example is Jeff (Abaz) LS VTEC. It didnt last. ???

Re: Such thing as reliable LS VTEC?
 

Which LS/VTEC? I remember the one he did with a free b16 head and reused a headgasket and someother ----. Or are you talking about the one in the tech project section?

Re: Such thing as reliable LS VTEC?
 

These are things that are required to make an Ls/Vtec relaible. Guys tend to think that by slapping on an 8500rpm head the a 6700rpm bottem end will stand up to those revs.

The rod bolts stretch do to the rotating inertial forces, bearing can't handle it, Oil and Water pumps on an ls are designed for an effieciency around 3500-5000rpm.

The things above + bearings are needed to spin an Ls/vtec like a b16 or GSR.

Re: Such thing as reliable LS VTEC?
 

i think what he is goin towards is...if he does ls vtec will it last like a factory b series motor...and your answer to this is NO UNLESS u do some of the things these guys have mentioned but still wont be as reliable as a factory b series but will be pretty close if u build it right and treat it right :D

Re: Such thing as reliable LS VTEC?
 

I have to say I totally dont agree with what many people think about ls/cr vtec motors. I have been on a totally stock b20z bottom end, stock oil pump/water pump for 10k plus miles and its seen 7500-8k on a daily basis and it runs perfect. I think a lot of the information is ------ around by people reading something online and never acutally doing it. And also how can one say "my ls'vtec blew because of a stock oil pump" when in all reality you beat the ---- out of it every day for a year and it finally blew up, it could be tons of things.

Re: Such thing as reliable LS VTEC?
 

Jeff's lasted plenty long for alot of f'in boost and mileage wise. If he would of ran 6 psi it would proably still be drivin around now

Re: Such thing as reliable LS VTEC?
 

all b series oil pumps after like 98 are the same, the water pumps arent any different its the amount of teeth. its simple, you match the water pump to the timing belt. honestly will a LS vtec be as reliable as a HONDA build b18c? IMHO no because honda simply build awsome motors stock. without a main girdle and oil squirters i dont see it being AS reliable. that being said how reliabe is any motor one you start swapping parts around? adding cams, different pistons, raising redlines, i dont think a LSvtec will any less reliable than a gsr motor thats been worked.

now you take a LS vtec build it right (ie measure bearing cam journal piston to wall clearances ring gap ect) and use OEM parts and youll have a damn reliable motor.

Re: Such thing as reliable LS VTEC?
 

YUp basically hit on the head. Any serious built it be turbo,nitrous,all motor is gonna lose alot of relaiblity. Stock ls/vtec rebuilt with oem parts and done correctley w/ a 8000 rpm rev limiter will last proably longer than most people stay in the racing scene