Originally Posted by v8

ok james is your ltft's +25 or -25, if there -25 then its pulling fuel, if its positive then its adding fuel, so with you adding fuel to get it to richen up your telling it the opposite or am I just wrong all together rhino?

Originally Posted by closet red neck

I don't understand the first part of your comment....."just cause your not detenating means your makin more power.."if your detonating, your not making power......the tune is off, it's not running @ it's full potential. My truck has a slight audiable sound.....kinda hard to here under a helmet. You can't have an engine bang'in and pop'in down the rack and hope to get a good e.t. For the last time I did put it on the dyno........I made the power with 33* of total timing in it. Also to, small inch engines like more timing than a big inch engine. So you can't compare a 6.0 to a 5.3 to a 4.8. My dyno guy said that a 4.8 likes 33*-36*, 5.3 29*-33* and a 6.0 26*-31* depending on compression, fuel type, mods and so on.......he also said that these LSx based engines like heat too. We ran a total of five pulls and each time we let my truck cool down for 15min with threes huge blowing on it. We made the fourth pull, let the truck cool for like 5min(just to look at the fourth pull results) and made the fifth.......everything is hot mind you and we netted the most gains and this was the highest RWHP number. I know with LS1's 28*-30* total they won't make anymore power but thy more inches than us truck guys.


Thanks, with the CR I'm running and even with 93 oct, I think I can get away with more timing. Let's say 33* just for arguing.....LOL.....but I could be wrong, that's why I 'm on here now....LOL!!!!


Why not......It takes a min. of 65psi on a stock setup so I just elected to 75-80psi. I just figured that since my truck consumes the same amount of air as a turbo'd/supercharged truck running 5-6lbs of boost, the above stated psi would be sutiable to run the truck.

I don't know.......enlighten me......

James

Originally Posted by dirt_track_racer_81

i meant just because hes not detenating at 33 degrees doesnt mean hes making more power than 28-29 degrees..i ran my at 30 and didnt make any more power so i just set it back down to 28, and my 5.3 was the same way, another 6.0 truck was set to 26 cause it make no more power at a higher timing..a 4.8 i tuned with my old comp 212 218 came would only like 25 degrees..to me there really is no reason to run higher timing if its not making any more power..on the fueling i was just wondering guess thats a good enough reason for me

Originally Posted by v8

ok james is your ltft's +25 or -25, if there -25 then its pulling fuel, if its positive then its adding fuel, so with you adding fuel to get it to richen up your telling it the opposite or am I just wrong all together rhino?

Originally Posted by closet red neck

OK. But you have to take the consideration on compression ratio, fuel type, mods, how many inches the motor is..........every set-up is different. I have one of the hottest set-ups on this board. This is probably the first and only one that all of us had to deal with. That's why it's hard to compare all of the other set-ups to this one. I'm just trying to get you or other people to help me with this particular set-up just because it's so wicked!!!...LOL!!!! I will tell you this, I had 38* total(8* across the board) to Allens tune and let me tell you something, this thing woke up!!!

Please, Please.....I'm not arguing with anyone on here, I just want to learn how to tune my truck. I have a few issues to figure out on the idle side but then I'll have to work on the big end of the spectrum.

James

Originally Posted by litreddevil

that is what i am talking about 333 with a 6.0

i made 336 with a cam only 5.3 with 34* it ran a 12.59 with a 1.64 60'

6.0 should be more than a 5.3 in any form you put it most 6.0 are over 360hp
with just cam and bolt ons