This crank was prepared in the same fashion as our 88mm and 105mm strokers by Castillo's Crankshaft Specialist. Again, Joe and Rudy modified a K24 99mm crank to the new 94.9 mm, 3.737" stroke. We opted to use a smaller rod journal diameter for this crank and went down to the 1.771" B-series size. This will reduce bearing speeds compared to the larger 1.890" K, F and H rod journal diameter on the two previous cranks. The 94.9mm crankshaft will be utilized in our 2415cc NA development motor.


-Ron

 

 

niiice, is this the one with the 1.7 or something rod to stroke ratio?

 

1.668 r/s ratio for the 2415cc setup.


-Ron

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by edo &raquo;</TD></TR><TR><TD CLASS="quote">1.668 r/s ratio for the 2415cc setup.


-Ron</TD></TR></TABLE>nice, are you going to port the head aswell? and will you be running those ips-k10 cams?

 

we'll see what happens, right now stock cylinder head. We'll be testing all our NA cams in this motor.

-Ron

 

Nice job... are all the K24A cranks alike or do you prefer the TSX one for an example?

 

We've used Accord/Element/CRV cranks so far, but not the TSX mainly because of availability and cost. It doesn't matter really, the prep is the same.

-Ron

 

What is the advantage of having a lower bearing speed?

 

higher revs my friend...

actually i think that with the less bearing speed, there is less wear and tear on the bearings. also with the 94.9mm stroke compared to the 99mm... that enables the reving to go higher...

 

Reduced friction.

-Ron

 

just curious,
were the oiling holes for the rods/mains worked or did they come from the factory like that?
I forgot what the name is for the procedure, when you shape them like that.

thank you
m.

 

Teardropped oil chamfers, standard race prep at Castillo's and doesn't come like that from the factory.

-Ron