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Old 10-26-2003, 02:45 AM   #1
IA Performance
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Default Interesting tid bit on Sti 2.5L short block

So I was looking over the block right before slipping on the head gasket. I noticed that the semi closed deck side attachment points do not run all the way down the sleeve as I figured they would have. THey are only about 1/4 to 1/2" in depth. I had just assumed they did. I'm sure they function well though. DOes anyone know if the JDM sti motors are like this too?.

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Old 10-26-2003, 03:15 AM   #2
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Yeah I think the JDM motors are the same. I seem to recall talking to someone that said it was for cooling reasons? Not positive but pretty sure.'

M
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Old 10-26-2003, 03:24 AM   #3
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Just found this on axis's site. I guess the sleeve just needs a tad more support only at the top. The rest is hollow ot allow coolant to flow through I assume.

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Old 10-26-2003, 03:31 AM   #4
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Well, the top is where the most pressure is in the cylinder...

And yeah... if the channels were all the way downward, how would the coolant surround the cylinder liner to cool it down?
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Old 10-26-2003, 03:33 AM   #5
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hehe, it's late, can you tell :P Time to hit the bed since I'm missing simple ideas
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Old 10-26-2003, 06:13 AM   #6
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Quote:
Originally posted by East Coast Scooby
hehe, it's late, can you tell :P Time to hit the bed since I'm missing simple ideas
must be... I could have sworn it was in the I speed thread



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Notice the depth of the top rib, it is .200 deep by .470 wide. The closed deck we use is .310 deep.

http://www.i-speed.us/news/sti_block.shtml

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Originally posted by 8Complex
Well, the top is where the most pressure is in the cylinder...

And yeah... if the channels were all the way downward, how would the coolant surround the cylinder liner to cool it down?
On the ej22 it goes all the way down right???
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Old 10-26-2003, 12:10 PM   #7
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Quote:
Originally posted by totoherbs
On the ej22 it goes all the way down right???
Nope. The closed deck is the same thickness as the semi-closed deck you see in the pics from i-speed.

-Dylan
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