looking for compression test info on 04 trx with je pistons 10;1 and 9;1, anyone know what readings should be for either ratio, thanks
anyone know compression pds of je 10;1 and 9;1 pistons
- Thread starter powerstarved
- Start date
I don't know about JE's but with Wiseco 10-1, I had 165# when it was freshly rebuilt.
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boosted metal
Member
i think je 10;1 should be around 130-135 for compression
That seems real low for 10-1. These sleds are stock at 12-1 and compression readings are around 206 # at sea level, but depending on the elevation that the compression is checked at the numbers will drop 3% per thousand feet due to the density of the air.
compresion
I dont know the answer but am very curious, I checked mine with stock pistons and head shim. came in at 130, @3000 ft. shim is suposed to be 9-1.
I dont know the answer but am very curious, I checked mine with stock pistons and head shim. came in at 130, @3000 ft. shim is suposed to be 9-1.
dcturbo is that with je's?. i called dan at extreme machines and he told me the highest he has seen on his builds is for 10;1 is 135 ?
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dcturbo
Well-known member
Yes these are JE's. No head shim.
135 at 4700 ft. I wouldn't worry to much as long as they are 130 + and all give or take 5-7 lb of each other.
