been doing alot of testing and alot of spark plug reading, alot of old school friends being involved! got really nervous at the level of timing i been pushing, the end result has been spectacular!

question in hand is how much timing has one pushed in the LS based NA setup, mines a 408 but doesnt matter just currious on whats being ran?

the guys i been dealing with plainly told me **** can the wideband and tune by the plugs, the result has been amazing and the end result well i'll post slips when i feel satisfied

before i got kicked off my home track she was cutting 1.51-1.54 60 fts

now im forced to get a cage before i can continue to race on my home track again!

 

I was running about 31.5* on the top end shifting at 6900. Was cutting 1.8x with a 1.79 best.

 

There are too many variables to get any valid information from this question. to answer your question, i pushed my 5.3 up to 36* with zero knock...was i making any more power at 36* over about 28*? probably not.

 

im running 27.5 on the big end in my 6.2 seems to stop making power right around 27 - 27.5. i saw negligible increase on the dyno. this is on e85 though. on pump i ran a max of 23 up top.

coming out of the hole im around 30-32. e85 again. trying to get the heads to do something down low by forcing cylinder pressure in it's ***. on pump at 19-20.

some people don't realize that cylinder heads play a huge role in this. the more efficient the heads, the less timing is needed to make max power.

 

I'm running 26 degrees up top. Didn't make any more power after that so I didn't push it

 

i persnally dont think youll see knock unless something seriously goes wrong?

i think youre right on to many variables, i was told the softer runners will displace heat quicker and able to run more timing, along with other things, but i dont run after market heads just some ole ls3 heads ported and worked.

i started at 30* like most, i made 4 passes all with in a 2 hour window, pulling plugs , reading plugs, changing plugs, time slips showed improvement from 30-36 degrees, gains not only in MPH but ET and 60 ft times. they wanted me to keep adding timing until NO gains were shown then back off 2* , but before i could i was kicked off the track at evadale i went from a 118.9 mph to a 122.7 mph NA would be nice to see a 124 NA

its all good, i hooked up with some good people on the bullet