F24 Build
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From: Raleigh, NC
Originally Posted by oober,Aug 15 2009, 09:31 PM
u can flip the pistons and just cut the reliefs on the exhaust side of the piston to make up for the bigger intake valve and solve the offset issue, assuming they have the same exact offset keeping in mind the motors spin different directions..
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what exactly are the "right" pistons? most aftermarket pistons are not FRM friendly and require sleeving the cylinders, which is $$$. the reason why people use the mahle gold series H22 pistons is because they are FRM friendly and do not require sleeving. is there an aftermarket piston u can use with the k24 crank that is FRM friendly and has the right offset?
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Joined: May 2002
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From: Raleigh, NC
mahle makes custom pistons for about $100 more than shelf pistons.
if you want contact info for an engineer at mahle that can do this for you pm me.
fyi, i did the original testing on the h22 gold series pistons.
if there is demand i can talk to them about a shelf "custom" piston for this application.
if you want contact info for an engineer at mahle that can do this for you pm me.
fyi, i did the original testing on the h22 gold series pistons.
if there is demand i can talk to them about a shelf "custom" piston for this application.
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Joined: Aug 2009
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From: Huntsville, AL
Does anyone know where to find info on whether the Accord cranks have the same counterweight structure/ masses as the TSX crank? If I'm going to go to the trouble to build a short block, I'm going to use a set of Eagle or Belfab rods and turn the 9000 rpm that the dyno plots show the motor wanting to turn.
Kial, how much do you beat on your motor? How often do you see redline? How high is your rev limiter? I'm really interested in building one of these for my street car, but I'm curious as to how quickly I'll destroy it...
Kial, how much do you beat on your motor? How often do you see redline? How high is your rev limiter? I'm really interested in building one of these for my street car, but I'm curious as to how quickly I'll destroy it...
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Joined: May 2002
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From: Raleigh, NC
I did some math on the 2.4 stroker and here's what i have come up with, if the guys at mahle are willing to do something i think this would be the best option.
k24, 99mm crank
use stock f22c rod
the piston would have a shorter compression height and a 7cc dome
this would make the engine much happier geometrically speaking and give you around 12.5:1 compression which depending on cam choice will work with pump gas.
the only issue i can think of is the stock size f22c pin may be too big to be moved up to a .978" compression height.
to use an h22 rod, the required compression height would be 1.24 inches, which would make the piston unstable at high rpms.
k24, 99mm crank
use stock f22c rod
the piston would have a shorter compression height and a 7cc dome
this would make the engine much happier geometrically speaking and give you around 12.5:1 compression which depending on cam choice will work with pump gas.
the only issue i can think of is the stock size f22c pin may be too big to be moved up to a .978" compression height.
to use an h22 rod, the required compression height would be 1.24 inches, which would make the piston unstable at high rpms.