e85 timing
e85 timing is there anyone out there running stock internal ls motor on e85 and turbo? just trying to see what kind of total timing you are running at WOT at higher rpms around 6k. i am tuning with efi live.
I believe we arent running much more then factory timing levels all around, but under boost and WOT i believe we are running right at 17* For the moment, we've pumped stupid amounts of timing into on the last motor and wont be doing that again.
I was told to not really go past 15-16* timing upper RPM+WOT+BOOST.
so, i suspect we'll tinker with it, and not push it too hard.
stock LQ4 6.0L w/ LS6 cam and GT45 last year ran 25 degrees 15lbs of boost. Worked pretty good. No knock and made quite a bit more power over the 18 degrees i had it on 93 octane.
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Only add timing until you stop making power!
Trust me
With gasolines you tune until you encounter knock.
But with E85 you will encounter MBT (maximum brake torque) first, if you add timing beyond MBT or max power you will lift the head or bend a rod..... or worse.
Also Do not add timing advance until after you have hit max load then aggressive add it until red line. It will keep the stock rods alive. I normally use -1 degree or 0 degree depending at peak torque, then as the rpms raise I ramp in the timing like a champ which you will be more than able to do with E85.
It is very tempting to have timing advance at peak torque and it feels great but you WILL LOSE longevity with a stock motor.
thanks for reading
Rob
PS I've lifted a head or two in my day using E85 LOL trust me...
Trust me
With gasolines you tune until you encounter knock.
But with E85 you will encounter MBT (maximum brake torque) first, if you add timing beyond MBT or max power you will lift the head or bend a rod..... or worse.
Also Do not add timing advance until after you have hit max load then aggressive add it until red line. It will keep the stock rods alive. I normally use -1 degree or 0 degree depending at peak torque, then as the rpms raise I ramp in the timing like a champ which you will be more than able to do with E85.
It is very tempting to have timing advance at peak torque and it feels great but you WILL LOSE longevity with a stock motor.
thanks for reading
Rob
PS I've lifted a head or two in my day using E85 LOL trust me...
Last edited by ModularTurbo; Jun 15, 2011 at 10:32 PM.
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