5.3 to 6.0L performance swap, need help with the tune please

[mcarmack]

replaced a 5.3L with a performance 6.0L (ordered through oreillys) (specs for engine are listed below) . using same injectors. I already changed the tune on it, but all I done was change cylinder size from what is was to the size of the 6.0l bore. It runs like crap. what all do I need to do in my tune to compensate for this new engine?
the sheet it came with does not tell me any about the cam lift, all it says is that it will have a "noticeable idle"



horsepower: 460 @ 5600
torque: 470 @ 3800
block: seasoned OE LQ4/6.0L iron
Bore/Stroke: up to 4.040 x 3.622
displacement (cu. in): up to 371
Crankshaft: OEM GM 24 tooth reluctor wheel
Rods: stock GM
Pistons: Hyperneutectic / 9.5:1 Compression
Rings: Moly
Camshaft: Hyd. Roller
Cam Specs: Customer Performance Grind
Cylinder heads: OE Aluminum 71cc 2.00/1.55
Rocker Arms: OE Powdered Metal 1.7 ratio

[2xLS1]

Knowing the cam specs would help a lot. And not the lift but the duration and LSA. Runs like crap is not helping either. What is the problem? Idle? Off idle cruise? WOT? Some? All? What you posted appears to be a completely stock file. Even the cyl vol. The stock 24lb injectors will probably be to small and it the cam is very big or with a narrow LSA, idle could be an issue with a stock torque converter.

[mbray01]

from the sheet given it looks like ve and maf require remapping, the simplest will be turning ve off, (although I do recommend fully tuning ve as driveability is much better with ve enabled) turn ve off at 400 rpms re-enable ve at 300 rpms and work the maf table. This should atleast get you running. The idle tables will require considerable work. these things should get you on the road however a full tune is in order

[Shopboyz]

I'm about as new to this as it gets, so this is as much a question for the experienced guys as it is an answer to the OP. Wouldn't a copy/paste of a stock 6.0L tables be a much closer starting point? Pretty sure that's where I'd start anyway, should get drive-able and you tweak from there.

[mcarmack]

Knowing the cam specs would help a lot. And not the lift but the duration and LSA. Runs like crap is not helping either. What is the problem? Idle? Off idle cruise? WOT? Some? All? What you posted appears to be a completely stock file. Even the cyl vol. The stock 24lb injectors will probably be to small and it the cam is very big or with a narrow LSA, idle could be an issue with a stock torque converter.

The vehicle runs right now , it just doesn't idle well . Seems to clear up with giving it throttle , but will die after it comes back down from WOT. I don't think this can is a whole lot bigger than stock . But again I don't know and the build sheet does not say

[mcarmack]

The vehicle runs right now , it just doesn't idle well . Seems to clear up with giving it throttle , but will die after it comes back down from WOT. I don't think this can is a whole lot bigger than stock . But again I don't know and the build sheet does not say

Also yes the file I attached is from before I edited anything

[Ranger6202]

I'd start by disabling your VE, start with MAF tuning just to get it running consistently and see what else may be acting up (like your dying after WOT). Oh, and i probably wouldn't be doing WOT using 24# injectors on a motor rated @ 460hp. You're gonna need about #36 injectors. And how about posting a scan for us too....

[gagliano7]

Here are the cam specs.

It's a Howards cam with Duration 269 / 278

Duration @ 50 216 / 224

Lift 551 / 551

LSA 114

110 CL

Change your engine type and cylinder volume to a 6.0 under engine general to get you started. Then you could copy the idle airflow table and spark tables to get you started. There is a 2004 ss silverado stock tune in the tune repository you can look at.