Tuning question

E

EPA Violator

CR Wrencher
Joined
Mar 8, 2008
Messages
560
Just want some valued opinions, dynoed my truck at TS made 722 hp and only 1100 some torque, peak power was late at like 3000-3100. I was majorly disappointed as I made 780 last year with 50 hp smaller injectors. Right before the dyno I pulled the head due to some leakage of coolant, long story short my studs probably weren't adequately torqued b/c of torque wrench miscalibration, anyhow now I have o-rings and 625 studs clamped the hell down. At that time pistons and cyl. walls looked immaculate. Setup I ran an TS is dual pumps, flux 4.3's, cam, springs, 62 over 480, used Smarty sw7 with tq mgt 4, mild rail press. and timing 3 with power puck pressure on lo. The 780 run last year was with same setup except had flux 3.3's and did Smarty sw7, with tq mgt 1, mild rail press. and timing 2.
Max boost on the dyno at TS was 64 and it smoked terribly never cleared up. I got the temporary fix on the wastegate from TS and I think it is now working because with the spring clamped down it made 85 psi drive pressure and total 65 boost with smarty on 5, timing 3 no added pressure.

So,,, I am thinking the truck didn't get loaded well at TS on the dyno, so as of now the plan is to advance timing to 2 and use SW 9 and get some private dyno time. Any suggestions on other things to try? Thanks
 
EPA Violator said:
Just want some valued opinions, dynoed my truck at TS made 722 hp and only 1100 some torque, peak power was late at like 3000-3100. I was majorly disappointed as I made 780 last year with 50 hp smaller injectors. Right before the dyno I pulled the head due to some leakage of coolant, long story short my studs probably weren't adequately torqued b/c of torque wrench miscalibration, anyhow now I have o-rings and 625 studs clamped the hell down. At that time pistons and cyl. walls looked immaculate. Setup I ran an TS is dual pumps, flux 4.3's, cam, springs, 62 over 480, used Smarty sw7 with tq mgt 4, mild rail press. and timing 3 with power puck pressure on lo. The 780 run last year was with same setup except had flux 3.3's and did Smarty sw7, with tq mgt 1, mild rail press. and timing 2.
Max boost on the dyno at TS was 64 and it smoked terribly never cleared up. I got the temporary fix on the wastegate from TS and I think it is now working because with the spring clamped down it made 85 psi drive pressure and total 65 boost with smarty on 5, timing 3 no added pressure.

So,,, I am thinking the truck didn't get loaded well at TS on the dyno, so as of now the plan is to advance timing to 2 and use SW 9 and get some private dyno time. Any suggestions on other things to try? Thanks
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Jay, as you mentioned; hit the rollers and try and dial things in.
 
I'm gonna dyno Sat......Should I leave the gate completely closed off....Or back it off a few rounds where it'll open up a bit...??


Good luck Jay!!!
 
Do you think with the larger injectors and torque on 4 you had too much fuel down low to soon?
 
Howling, you are exactly right, that is what it is, way too much fueling before any boost is built. Played around some today and it will only do it when launching and it is so much fuel some of it is gray not even black, the injectors only have about 15,000 miles on them since bought new and Don just went through them, also starts easy etc. blah blah, it ain't the injectors it is the programming, gonna try stock tq mgt, I gotta call big swole tonight. Jay
 
I usually run TM 2 on mine,still trying to get the right setup on my truck as well(tntr) sw 9 or 7, tm 2,rp 1,timing 1 or 3 with the mp-8 50-75%.
 
If your wastegate on the secondary wasn't sealing would have made it worse, but yeah, on a inertia dyno, you want spool as fast as you can, and with big injectors usually means not mashing the go pedal off the start.

My truck will do it too, mash it with no boost and you just bog it out. First thing I would change about my smarty is the low rpm, low boost fueling.....way to much.

Might need to use the brakes to get the turbos singing and ready to nail the load if they can't load you up with the dyno.
 
Too much fuel when not on boost is definitely the problem, dang truck will pop when I free rev it and puff gray with the black, when driving it only occurs in 2 and 3 gears b/c if you can load it and make boost it will burn the fuel and not just blow it out. I turned the tq mgt to stock and it still does it, yall have any other suggestions? I might have to try a different tune or programmer all together. jay
 
Hey any of you all ever try just the TST without a programmer to better control the onset of fueling?
 
EPA Violator said:
Too much fuel when not on boost is definitely the problem, dang truck will pop when I free rev it and puff gray with the black, when driving it only occurs in 2 and 3 gears b/c if you can load it and make boost it will burn the fuel and not just blow it out. I turned the tq mgt to stock and it still does it, yall have any other suggestions? I might have to try a different tune or programmer all together. jay
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When you say it will pop, do you mean slowly rev it up to say 2500 and it does it, or if you stab the throttle at idle?

I think something's up, If I'm careful with the throttle I can drive tnt-r around town on kill and be smoke free.

Get heavy on the throttle at a light with no boost, and the car to the right is wondering what happen'd to day.
 
Joe it is only if you stab it in neutral and punch it while pulling out in second and rarely but once or twice once in third and you punch it, after that it just smokes and goes like it should. No, if I rev it up slow it does just fine, no pop. Whatcha think? When I saw punch and stab I mean floor it, it is definitely too much fuel at once, I just need to figure out how to alter this with the tuning. jay
 
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What type of pop, like a low rail pressure pop or timing knock?

Are you just running a smarty right now?
 
Wes, it is definitely a pop and when it does it, it puffs gray instead of the black that is already coming out. I wouldn't think it would be lo rail p. because it doesn't change with or without added pressure. Only smarty and stand alone pressure box and pressure doesn't change it. Any ideas?
 
The big injectors come in to play there, in reality the tune should have injector size as a option, and then it would have a clue as what to do. It comes down to controlling it with the foot feed.

This could be controlled a bit with a reverse mp8....less rail pressure at low rpm's/boost would help.
 
I have thought of this extensively also, given what I do have to work with, what would you recommend, I mean I can control it with the foot, but it isn't optimally tuned, I need some more options here.
 
Tried multiple things tonight, hi rail p., lo rail p., big time timing advance, retarded timing etc. they all result in overfueling the truck down low. Put the truck back to stock and it runs better, no pop and overfueling down low and even made total 60 psi on stock tune. I think the flux 4.3's are too much fuel, I am seriously considering going back to 3.3's, they made more power and less smoke and drivability issues. Anybody wanna trade their 3.3's for my 4.3's? Great sales pitch Huh? Jay
 
Overall boost at 3,200 rpm? 64psi?
boost from primary only?
rail pressure at 3,200 rpm?
egt at 3,200 rpm?
how much boost did you start the run with?


based on the similarity of our setups, I don't think your injectors are the problem.
 
Here is Jay's truck on dunbars at 64psi of boost

Here is mine on the dyno. Dam near same mods and 70psi boost


I made about 16 more hp and a little more tq. I used sw 5 he used 7. Everything else was the same. He has dual pumps and I have a singe cp3. Something is up!
 
HIGH TECH RAM said:
Here is Jay's truck on dunbars at 64psi of boost

I made about 16 more hp and a little more tq. I used sw 5 he used 7. Everything else was the same. He has dual pumps and I have a singe cp3. Something is up!
Click to expand...



Yall are both pretty smokey, but you cleaned up faster than his 2nd and 3rd runs.

Maybe his temp WG fix isnt working all so well.


Both look like sleepers, good looking trucks:Cheer:
 
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