I did a compression check on my gsr and it came up 210 across the board, & to my knowledge its a stock motor, it was recently rebuilt but the guy told me it was done with stock internal's i just purchased the car and i am gettin ready to pull the swap out, does anyone know any reason why the comp is so high??

 

when i had my bone stock gsr...it hit very similar numbers....205-210....those are normal numbers for 10:1 compression. you should be glad, it appears to be sealing well.

 

ok cool thanks for the input