Quote:
Originally posted by TurboDave
Could be several reasons. Maybe the fuel octane where you're at isn't up to snuff.
For example, we have good quality 93 octane fuel here, which allows for a little more boost, all things being equal.
You also might want to try a lower timing chip. I have my Extender cut for 18° of timing in 1st and 2nd, and 16° in 3rd and 4th.
That, coupled with the 93 octane fuel, allows me to run an honest 21# of boost in 1st and 2nd, and I only have it pulling back to 20# of boost in 3rd and 4th. and suffer NO knock retard.
So, what does all that mean? Try a lower timing chip, AND you may be able to jump up to 17# of boost or so, assuming you do in fact have a 9:1 C/R.
Also, MAKE SURE THE KNOCK SENSOR IS PROPERLY TORQUED!!!!!!!! 14 lb/ft, no more, not less.
|
Dave,
I have a 20/17 degree chip by TT and even then I cannot run it or the extender without taking a least 4-6 degrees of timing out in order to have 0 kr. Now when the timing is pulled back 6 degrees I can run a solid 20#'s boost-plus if the higher compression ratio of my engine that 20 #'s may actually be 23-25 #'s of boost????
Well, I would assume you and I probably have pretty much the same fuels that advertise "93" octane, I'm just up the river in an adjoining state from where you are located.
I bought an inch pound torque wrench just for the purpose of setting the torque on the knock sensor.
Thanks,
Jerry