Which one is better? How many hp and rpm are the limits of B18C1 and B18C5 crankshafts?
Thank you!

 

most people are using oe cranks.

i just wish i didnt already have rods when i found out i needed a crank. (restock fee and a wait) i would have went with the ls.

as far as differences in stock form from the c1 to c5, i dont know all the particulars.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PARADOX_sf &raquo;</TD></TR><TR><TD CLASS="quote">Which one is better? How many hp and rpm are the limits of B18C1 and B18C5 crankshafts?
Thank you!</TD></TR></TABLE>

for boost, either one will work. There is no "better".

 

the stroke is the same, although the crankshafts have an actual difference, if you have a gsr crank use it, if you have an itr crank then use that, if you can buy either one for the same price then get the itr.... there is a reason that honda made it different in the first place

 

ITR crank is heavier.

 

type r is heavier...more counterweights

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vesperfx &raquo;</TD></TR><TR><TD CLASS="quote">type r is heavier...more counterweights
</TD></TR></TABLE>

These are all true. As I said, though the purpose of forced induction, the difference is negligable. If it were N/A, I'd say the Type R.

 

weight = bad... use a gsr crank

or better yet... an ls crank

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">weight = bad... use a gsr crank

or better yet... an ls crank</TD></TR></TABLE>

rotational weight is helpful in dampening higher vibration.

LS crank is very good for boost. Make sure you use LS/B20 rods to match.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">weight = bad... use a gsr crank

or better yet... an ls crank</TD></TR></TABLE>

i guess thats why HONDA put the HEAVIER crank into a motor that revs to 8,500 compared to the LIGHTER gsr crank designed to rev to 8,200

LS crank is great and people rev the **** out of them basically any of the honda 1.8 cranks will work although the ls crank/stroke will result in higher tq

 

so whens the last time you saw an aftermarket crank that said .."heavier than stock good **** buy me"

 

If its balanced properly it shouldnt have any vibration anyways.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">If its balanced properly it shouldnt have any vibration anyways.</TD></TR></TABLE> Which they are from the factory. But the GS-R was not originally designed from the OEM to do that. Yell at Honda for their logic, but I guess I'm one of those that understands why they used the heavier crank for the Type R.

 

Maq you put too much thought into everything. Balance the LS crank and rev it to the moon!

 

you cant really "balance" a 4 cylinder anyway

i can see it now " buy our new super crank, it weighs 30lbs more than stock! " i bet everyone on ht will buy it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">weight = bad... use a gsr crank

or better yet... an ls crank</TD></TR></TABLE>

So why is the type r crank heavier, why did honda make it that way?

I've also read something on the endyn site where lw was saying he prefers the heavier cranks too.

Not to mention, the small increase in mass is so close to the crank centerline, I highly doubt you'd be able to notice any difference in rev response/whatever..not like a change in flywheel mass.

If I had the 2 cranks just sitting in front of me, gsr/type r, I'd chose the type r. I'd rather have a heavier crank and a tiny bit lighter flywheel than the other way around.
?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">Maq you put too much thought into everything. Balance the LS crank and rev it to the moon! </TD></TR></TABLE>

Yeah, sometimes I do tend to do that... Just the nerd in me, I guess.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">

So why is the type r crank heavier, why did honda make it that way?


?</TD></TR></TABLE>

They type r is better balanced. The gsr isn't completely balanced, and to completely balance it honda needed to add more weight.

 

the ITR crank weights more (to help with high RPMS) and has micropolished journals from the factory.

 

Just wondering, do most of you answer from actual knowledge or just repeating what you heard? Ever think that the itr extra counterweight is a direct relationship to the increased piston dome volume compared to the gsr.......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00b18b &raquo;</TD></TR><TR><TD CLASS="quote">Just wondering, do most of you answer from actual knowledge or just repeating what you heard? Ever think that the itr extra counterweight is a direct relationship to the increased piston dome volume compared to the gsr.......</TD></TR></TABLE>

who's that directed to??? and also we are talking about crankshafts not pistons. also the itr crank does not have just 1 extra counterweight, its about 8 countreweights . and the weight is to decrease vibration, not because of piston design

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony413 &raquo;</TD></TR><TR><TD CLASS="quote">

who's that directed to??? and also we are talking about crankshafts not pistons. also the itr crank does not have just 1 extra counterweight, its about 8 countreweights . and the weight is to decrease vibration, not because of piston design</TD></TR></TABLE>

to all....yes i know we are talking about crankshafts. i meant counterweight"s"....but with increase dome volume of the pistons = increase of weight...to offset this weight is to use counterweights....

 

ummm i personally dont believe that was the case. I dont think that adding such a small small small "lift" in domes would cause a need for the crank to gain some weight.

lets just stick with "it weights more to help lower engine vibration."

 

thats the exact reason i ask the question i do... an answer without any logical explanation or facts proves to me the individuals has no or very little understanding of the subject.....

more weight does not help lower engine vibration..... a very precise amount of weight added to its resonance frequency will help lower the harmonics typically 3rd order(engine vibrations)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00b18b &raquo;</TD></TR><TR><TD CLASS="quote">thats the exact reason i ask the question i do... an answer without any logical explanation or facts proves to me the individuals has no or very little understanding of the subject.....

more weight does not help lower engine vibration..... a very precise amount of weight added to its resonance frequency will help lower the harmonics typically 3rd order(engine vibrations)</TD></TR></TABLE>

i understand you asked a question, but what i dont get is the logic behind your question. your making it seem like the pistons in a ITR are so drastic when thats not the case at all, they are pretty much the same just one has a side wall coating and the other doesnt. also the ITR pistons weight 5 grams more than GSR pistons so there could be a source for more weight, but where that extra weight comes from idk but i doubt its from ading a "edge"