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Old 05-04-2010, 12:17 AM   #1
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Worn rings, new block or rebuild?

well my rings are worn to the point of pushing oil past in higher rpm. I'm not comfortable in rebuilding the block myself. So with pros/cons weighed it's most likley going to be the same price... or cheaper to just buy a built block from CFM.

The built block will net a C/R of 9.5:1 with an SVT head and if I use a stock zetec head gasket it should put me at about 9.9:1.

Now with that lost .3 on the C/R should I grab a crank OD pully and push a bit more boost or leave it alone? I just don't want to lose power from this, I at least want to stay the same or gain something out of all this.

Any other suggestions or points of fact would be greatly considered.


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Old 05-04-2010, 12:20 AM   #2
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well i would rebuild just get the block checked and put new rings in it or get new pistons and rods but they are not needed. you will also want to get new arp hardware but with the jrsc the low comp block wont help really
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Old 05-04-2010, 12:39 AM   #3
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yeah but as said the overall cost of the rebuild will probably cost the same if not more than the new block. On top of that I don't know any real good engine builders around here that I know I can trust, the CFM block I know I can trust to be well built and speced properly.

Not really worried about it making a ton more power I just don't want it to hurt the power a ton. 5-10 less whp would be ok but if I add a crank OD pully the -.3 from stock SVT would probably help control any knock from the added heat.

I just want to KNOW it's good and done right. I'll check around my area at some shops and see if I can get a good price on a rebuild though.
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Old 05-04-2010, 02:08 AM   #4
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the rebuild is not hard as far as putting stuff in it is the honing and making sure the block is good and then make sure the stuff is tourqued right.
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