New turbo engine this yr. stock lq4 with new V springs and a 7578 turbo with 12 lb spring.

whats a safe amount of timing to start off with ?

how many degrees to pull out per lb of boost ?

does anyone have a system they use ?

chart ?

 

When we were tuning my truck i believe we started off around 12* and ended up around 15-16* but mine is an lq9.

 

You kept the stock pistons? What's your CR at?

 

All stock !

 

Safe would be 15* or little less imo. Im at 14.5 now and thats where im staying. On stock ls1 long block besides cam. Info in sig. On 8 psi now going towards the 14 mark soon with lots of methanol. Timing will remain the same because i read and hear most start lifting heads on stock stuff when they start getting brave on timing and going on up lol.

Ppl told me with methanol on stock stuff it should be good to 18 degrees or 19 but im not made of money and i dont wanna push it. If you got the spare cash to chance it i say go for it. More timing more power.

 

i like to start all my motors around 14lbs and 14deg and see how they like it.

 

im running 14#'s and ended up at 12 deg tapering up to 14. some setups end up with less, some end up with more

 

you start your stock engines with 14 lbs ?

 

There really is no magic number you start with. Just dont put anything crazy in and start tuning. Start low (not too low) then keep bumping it up a little and find the sweet spot

 

Keep the timing at peak torque low if you wanna be safe.

I have 19* at redline but only 13-14* at peak torque

 

I started around 12* and added the additional timing to the IAT adder table. This will only add the additional timing under 100* iat's

 

100% stock 5.3 on e85 21psi and 18degs, so far so good about 2000 miles at that.
on the big end afr touchs 12.0

 

absolutely
wastegate is set to 14 cant run any less, why waste the time with lower boost levels