Shimmy.. On a windows, pull up the screen shot you want to take then hit Control / PrntScrn (up top in F key area)

Then go over to paint and hit Control / V

Should work something like that.

 

Low load highway driving isn't the same when its 293ci vs 346, 364 or higher... A 4.8 is going to be loaded more to maintain speed, especially at 85mph or pulling a boat... And E85 burns slower so your EGTs will be higher as well. Your cruise timing does look a little low though, Rob. Add some and you might see some better mileage and torque at cruise, and cooler exhaust pipes.

 

Copy from hptuners, paste special as transpose in excel, copy that and paste back into hptuners. The labels will be backwards though...

 

I'm looking at stock tune 4.8L I got off Hptuners forum, man I guess after 4000x flashes all my stuff got cutout down up top...I think the truck is do for a ground up re-tune... I usually focus on what I want on a 2-step/trans brake boosting/ top end. Need to re-group down on little things.

 

im at 50* under no load and 45* cruising in my car that runs on E85, i have 34* in it to 6psi of boost then it ramps down to 20* on 25psi.

needs more timing to start the burn sooner in the cylinder.

 

You'll notice a huge gain in torque once you re work that spark table. I know I sure did going from low 30s to around 42-43* at 60-70 mph cruise...

 

I forgot I don't have Internet at home so this is the best I can do...

 

Hey Foose, I am doing a similar build to what your truck started out as. 4.8 ls6 cam 5 speed single 76mm. It is for the ol lady to drive thinking 15 psi inter cooler. Make a custom pass manifold turbo mount. What size injectors you recommend? Any other recommendations?

Thanks

edward.coss@gmail.com

 

Have you logged emap(exhaust manifold absolute pressure) yet? That will tell you if the hot side is what is holding you back. Typically you want to keep it close to 1:1 as possible. Typically you can get away with 1 psi boost:1.5 psi emap and still be doing ok. I am not really familiar with the v8 but the theory should be the same as a 4banger. If you are making alot more pressure in the exhaust manifold then you are in the charge pipe it can cause you to loose power. It kills the efficency of the turbo leading to little to no power gains with an increase of boost.

 

Look around in the FI section, he did a good bit of back pressure testing before he bit on another turbo.