nitrous small shot tune

[GeForce1986]

greetings mopars

just wondering if my tune is safe for a 75shot of wet nitrous without a change on it

its attached there

thanks all

[rays04gtx]

greetings mopars

just wondering if my tune is safe for a 75shot of wet nitrous without a change on it

its attached there

thanks all

Yes.....75 wet, fairly save, I've run 100 dry on stock 04-06s 07-08 should add some fueling, Eagle headed 5.7s should add some fuel to 100-150 dry and Wet.....

but I would pull some of the timing, Attached is you tune w/Modded spark , look at the calibration Notes .

I would suggest that you make all your timing tables have the same RPM scale, it helps with transitions from PT to WOT and MBT limits.

Curious what Cam is in there ?

[GeForce1986]

Yes.....75 wet, fairly save, I've run 100 dry on stock 04-06s 07-08 should add some fueling, Eagle headed 5.7s should add some fuel to 100-150 dry and Wet.....

but I would pull some of the timing, Attached is you tune w/Modded spark , look at the calibration Notes .

I would suggest that you make all your timing tables have the same RPM scale, it helps with transitions from PT to WOT and MBT limits.

Curious what Cam is in there ?

well my afr is reading 12.6 at wot knowing that i run a walbro 450 pump with holly fuel rails holly intake manifold and a 6.1 injectors i got almost 65 to 68 psi fuel pressure ,, cam is crower custom heads are 6.1 ported and valves upgraded , this car have many many modes .

about changing the rpm ranges in the part and mpt spark from the wot table isnt this mean that i have to retune my spark for the changed tables
? or its not gonna have problems ?
also should i equal the wot thermal spark table with the normal wot ?
thanks

[rays04gtx]

well my afr is reading 12.6 at wot knowing that i run a walbro 450 pump with holly fuel rails holly intake manifold and a 6.1 injectors i got almost 65 to 68 psi fuel pressure ,, cam is crower custom heads are 6.1 ported and valves upgraded , this car have many many modes .

about changing the rpm ranges in the part and mpt spark from the wot table isnt this mean that i have to retune my spark for the changed tables
? or its not gonna have problems ?
also should i equal the wot thermal spark table with the normal wot ?
thanks

Been a long weekend , I'll spend some time tomorrow on this

[GeForce1986]

Been a long weekend , I'll spend some time tomorrow on this

alright thanks .

any way i tried and did change the rpm ranges in part tp table but this game a big nock noise so i retrieve it back ^^
but am waiting for your feed regarding the nos matter
also if you saw any thing missin in my tune that i can mode to take more power epically in the gear side and the tcc tables

thanks again

[rays04gtx]

your tune is fine as is for a 75 Wet shot. I'd pull a little timing in the WOT , Attached is your file with 2 ^ pulled where I think it's too much for NOS....see calibration notes for Details.

your Stoich value is roughly 14.9(.0670) when in "PT" "closed loop" when you changed the PT to match your WOT scale, there is too much timing in the 40-60MAP@ 1980RPM up except where you have - Values for your Chop cam timing..

It's was too lean for the PT timing when you changed the scale to match your WOT scale.


I've found this has been a good RPM scale for the Non-VVT 5.7s ,

608 723 838 1056 1376 1696 2073 2506 2993 3488 3951 4385 4805 5231 5677 6040 6208

Even with the 6.1 heads your 65XX is little excessive, for example our 670HP 345CI with Apache Heads rides 24^ all the way up from 4800 till it bounces off the 8160 Limit of the PCM.

I've toyed with 6500-6800 as a top cell value, but haven't found any " power" in there.......... what it happens is it over stretches the resolution of the table, you only have 17 values to use , the closer the data points are the easier it is for ECU to have better control over timing. the larger the gap the longer it uses the last value, which in some cases might be too much timing for the Fuel "load" and cause knock. ....the 6.1 in my daughters 04 Rumble bee we end that WOT table at 5000 and it runs 26^ degrees till the 7800 limit. , the ECU uses it's last data point.
The WOT scale your using is from the 6.1 Files, and honestly I think it's one of the reasons 6.1s ate some many pistons, some times they would go from WOT table to PT and carry 37 degrees of spark and only be commanding 14.4-14.7 AFR and lean out, and the "pro tuner reduced the knock sensor and it would be late to the party so BOOM detonation...and over a period of a few months............but I digress

Now remember your bore is .138 smaller then a 6.1 ....the smaller bore need less timing to get the job done....less distance for the flame front to travel.

The G1 hemi (331,345,392) make their best power with 30^ all in by 4500RPMS, while the G2 (ORG 426) needs as much as 42^ to make peak power and it can come in as late 6k ...Difference in bore is .25

My 2nd oldest son worked for DCX and then FCA, he was one of the guys who wrote code for these ECU/PCMs, one of the reasons FCA changed the RPM scale for the SRT392s was to get better control of the timing table, they dropped 100 rpms off both ends of the scale to make the scale more "compact" and in return it gained roughly 25hp over the "DCX" thinking,

I've taking that thinking to some of the 6.1s I've done over the last few years and gain 10-15hp with converting them over to the SRT392 scale.

[GeForce1986]

great info to read ,, but i noticed that in dyno even at 7000rpm the graph wanna go more its still rising but the tuner was afraid of going over 7 as here they dont go over 6800 usually he said this is because of my race intake manifold and my cam but he didnt even refer to any thing regarding the rpm scales , maybe they dont know it here . so should i convert to the 6.4 rpm scale and retune my spark on that ?
also i run full slicks and a 3800tcc with a mancini 3.92 rear gear lsd and the tuner said that this ate some hp from my numbers but the car will perform as those numbers are there!
actually i tuned the gear my self si idk if the tcc tune i did is good or its holding my run out
the car is non vvt 5.7 yes but it have good modes other than the engine size
i got a performance parts shop here and i tune by my self for my friends who have lite modes so i need to keep my car in the line ^^

thanks for help again