Non-Interference Pistons-Pics
04-25-2006, 09:47 PM
#16
Addict
Rennlist Member
Rennlist Member
Tony (and everyone else),
This is not a performance upgrade, but rather a relatively simple way of getting a “peace of mind” regarding a potential timing belt failure.
This modification lowers the compression ratio from 8.0 to 7.9 and as Rande mentioned I have not been able to detect any difference in engine behavior from idle to max power. With custom GURU chips and the current cool California weather I am running 87 octane on a daily basis and frequently push the boost to 23 psi. Apparently due to the characteristics of the chips the part throttle high boost gives some very brief pinging before the port water injection does its job. Counter-intuitively the brief pinging is not there at WOT, where the chips can be properly programmed.
For convenience (easy access to belt and water pump change) with less concern of premature wear I am also running without belt covers.
See here for a more detailed discussion of the non-interference conversion.
Testa, You would like that, huh. I will just let nature do its job.
This is not a performance upgrade, but rather a relatively simple way of getting a “peace of mind” regarding a potential timing belt failure.
This modification lowers the compression ratio from 8.0 to 7.9 and as Rande mentioned I have not been able to detect any difference in engine behavior from idle to max power. With custom GURU chips and the current cool California weather I am running 87 octane on a daily basis and frequently push the boost to 23 psi. Apparently due to the characteristics of the chips the part throttle high boost gives some very brief pinging before the port water injection does its job. Counter-intuitively the brief pinging is not there at WOT, where the chips can be properly programmed.
For convenience (easy access to belt and water pump change) with less concern of premature wear I am also running without belt covers.
See here for a more detailed discussion of the non-interference conversion.
Originally Posted by testarossa_td
Nice work!
Laust..time to post a video of a running engine and a belt that has been cut almost all the way through!...I think you see where this is going
Laust..time to post a video of a running engine and a belt that has been cut almost all the way through!...I think you see where this is going
