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Post by 1ol74charger4me on Mar 3, 2016 8:44:43 GMT -5
They should work nicely. Hardened seats, 65 cc. chamber, 1.88 intake, and 1.6 exhaust valve. If you wanted to step up to a 2.02 intake valve, it would give you a really good valve job and with a port match on the intake side and a general cleanup of the valve pockets should do nicely with the rest of your parts. These are 360 heads so the intake will fit these right. If the springs seem to be weak, you may want to get something like a Edelbrock 5877 spring with a pressure close to a stock 340. Thats the last major piece! Good work finding everything. Now lets build a engine.
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Post by pouria on Mar 6, 2016 12:03:59 GMT -5
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Post by 1ol74charger4me on Mar 7, 2016 21:29:42 GMT -5
Must be a J head. Some can be a 2.02 intake but those appear to not be. Somebody has done some work on them by the looks of the valve springs or they may come different colors. J heads are a step below the x in stock form because of their ability to flow but all production heads are pretty equal when worked on. Lots of tests confirm that. Just looking at them, it looks like the intake springs have been changed? Couple of things I would be concerned with is the top picture shows some kind of erosion around the middle hole(could be a stain?) and the valve stems seem to be unequal heights. Stepping up to some 2.02 intake valves would help the height issue. Could be nothing, pictures are hard to tell. Off to the machinist?
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Post by pouria on Mar 8, 2016 11:08:10 GMT -5
Thank you for your comments :thumbup: I didnt notice anything abnormal around the holes from the close view but I will double check on thursday because I am on a business trip now. The valve stems will be measured and reported too. I didnt take to the machinist yet, will be the next step. Do you believe it is safe if I perform some port and polish job by myself? I am an amature and never did it before! I found the right machinist for the 3 angel valve job, but not for porting.
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Post by 1ol74charger4me on Mar 12, 2016 11:07:06 GMT -5
You can if you have a dremel like tool, carbide bits and sandpaper rolls for it and patience.Not hard but time consuming.
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Post by pouria on Mar 12, 2016 15:08:48 GMT -5
Yes, all the tools are available. Shall I touch the chamber too? The compression ratio is already very low and I am afraid removing any material from the chamber, although very few, but will make the compression worse. What do you think about this matter?
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