is there a difference in the length of the rod, if so could i run b18c rods in a b18b if i replace the crank in the b18b??

 

why would you want to run b18c rods in a b18b, the b18c rods are weaker.

 

because i am buying westcoaststyles pistons and rods(upgraded)H beam rods that claim to handle up to 900hp. the pistons are forged 9.5 compression. this is why, now can anyone answer the question that i want to know??

 

Yes the B18B's rod length is longer, thus having the 1834cc's over the GS-Rs 1797cc's.

Ragerized, you're wrong on that. I don't understand where you got that conception considering the GS-R motor has one of the highest piston speeds around.

 

the rod length has no effect on displacement... thats stroke you're thinking of. Say you have a motor w/ 89mm stroke (like the LS) if you put 90mm rods, or 120mm rods, the displacement would still be the same, the piston would just be moving 30mm higher up

I personally have no idea what the gs-r/ls rod lenghts are though. :thinking:

 

The only problem I foresee is that the LS and GSR rod journals are different. From what I remember with my build, the GSR has a larger journal than the LS. Is this correct?

Josh

 

the GSR rods are not as thick and wide as the LS's. let's see if i can dig up some pictures....

 

Nope. The B18B rods are shorter, that along with a taller crank gives the extra displacement over the B18C.

B18A/B, B20B/Z: 5.394" C to C
B18C: 5.433" C to C

To use them you need to also use a B18C crank. It will fit and work fine along with B18C rods in a B18B block. Conversly, you can stroke a B18C using a B18B crank and rod set.

 

GSR rods:


LS rods:

 

First of all, we're talking about running aftermarket forged rods here, so any comparisons between stock rods aren't really relevant to this thread.

Anyway, the only way to run B18C-length rods in a B18B block is to also use a B18C crank.

Whatever savings you're getting on the pistons and rods over new units will unfortunately be more than superceded by the cost of a B18C crank. Just as a point of reference, MSRP on a new one is $988.02.