When I had my 11:1 408/tvs1900 with 317s I ran 18 or so with no meth on pump 93, only 7-8psi though.

 

ًWhat type of valve train do you have for that hi rev rpm?

 

Stock valves, comp push rods, prc 650 springs, stock rockers.

 

I'm running stock valves as well. Comp Cams 249-269210-KIT dual setup with shims installed for more seat pressure, not sure what size it was off hand. Also have the Comp Trunnion Kits 13702. I aim for 6800 but with no shift light I have hit the 7000 limiter enough to think there was a reward for it, especially on the street.

 

Since this sounds like a call out I guess I can respond.
How much boost: 16lbs
what type of boost: 2.9 whipple
What type of fuel: Cali's best 91 pump gas(no meth)
target AFR: 10.8-11.4 AEM Wideband (looking into an NGK)
compression: 9.7:1 6.2, CNC LPE LSA heads, LS9 head gaskets
max timing: average 16-16.5*. Previous smaller cam and smaller exhaust I was at 19*. Slowly working my way back to that.

 

Thanks.

I set my rev limit to 6200 mainly to protect my transmission. I have patriot gold springs with stock valves and comp cam. Stock rockers

Boost=15psi through S480/94 turbo
CR: 9.5 with stock 317 heads, stock 6.0L MLS gasket and 5.7L aluminum built short block. Stock intake and TB.
AFR on my in cab WB gauge shows 10.8-11.
91 octane pump gas
I will have to get to my tuner about timing. It was tuned using EFI live while I have only HP tuners, so, I could not pull the tune.

 

Depending on your cam you may not need to go super high. Mine, for instance, makes peak power at 5800 and the turbo is too small so power drops off pretty fast after that. With that in mind I shift at 6100 or so.

 

I just had my Black Bear Tune checked when Justin was in town.
My truck is a 2002 2500HD LQ4 with a ProCharger supercharger and Snow Performance water/methanol injection, 8.1 liter marine injectors but the internals are all stock.
On the test drive the computer was pulling the timing to 6* BTDC with 7lbs boost and water/methanol spraying. Justin asked what fuel I had and I said Speedway because they have good coffee. I was told they had bad fuel.
I refueled with Sunoco 94 octane and a 1 liter bottle of 108 octane boost with MMT now my Scan Gauge II at 5-7lbs of boost is saying 17* BTDC and I added 1 liter of methanol to about 2 gallons of blue juice for the Snow Performance sprayer.
My plugs are AC Delco copper, gapped at 0.035. We looked into the cylinders and found no unusual carbon deposits.
My plan is to run through this tank and see what happens with just Sunoco 94 and NO MMT added.

 

Rob you know my setup, I see 17 up top. I also don't have the IAT rise that you do either and I am also heavier which hurts my ability to add timing.

 

Yup. Although I think you'd be surprised how much meth has helped my IAT's. I think you'll find my logs interesting when you get to take a look at them.

Good info in here guys. Thanks for sharing. I'll bump this back up to the top.