03 Chevy Silverado 5.3 stage 4 truck cam v2 help

[RDF1]

Its just a bad combination of parts.

Need a datalog of the part throttle shifting issue.
But get a tape measure and see how tall your tires are first.

The ECM 5002 setting is important on shifting. It has nothing to do with the speedometer readings.
ECM 9000 is only for speedometer.

Your ECM9000 is setup for 27" tire and 3.90 gear
ECM5002 is setup for a 28.2" tire and 3.90 gear.

You might have put a number in wrong cause a 295/65/15 should come out to 30.1 on calculator but should measure about 29.25-29.5" tall mounted to the truck with weight on it.

[001tuner]

Its just a bad combination of parts.

Need a datalog of the part throttle shifting issue.
But get a tape measure and see how tall your tires are first.

The ECM 5002 setting is important on shifting. It has nothing to do with the speedometer readings.
ECM 9000 is only for speedometer.

Your ECM9000 is setup for 27" tire and 3.90 gear
ECM5002 is setup for a 28.2" tire and 3.90 gear.

You might have put a number in wrong cause a 295/65/15 should come out to 30.1 on calculator but should measure about 29.25-29.5" tall mounted to the truck with weight on it.

Understood, will do. I had no idea I was going to run into this many issues just removing the supercharger. Thank you for the help, I will make further updates tomorrow.

[001tuner]

Is there any around this so I don?t have to tear it up apart and replace the converter? What is the recommended converter for this cam? It says that it needs a 2800-3200 but clearly that?s way off the marker as I?m running a 3400-3600 and it?s still too tight.

[gametech]

Is there any around this so I don?t have to tear it up apart and replace the converter? What is the recommended converter for this cam? It says that it needs a 2800-3200 but clearly that?s way off the marker as I?m running a 3400-3600 and it?s still too tight.

Converters stall based on the torque your engine makes. The one you have would have stalled far higher with the blower than it will now, so those numbers are misleading.

[RDF1]

Is there any around this so I don?t have to tear it up apart and replace the converter? What is the recommended converter for this cam? It says that it needs a 2800-3200 but clearly that?s way off the marker as I?m running a 3400-3600 and it?s still too tight.

So just because a converter is marketed as a 3400-3600, it all depends on engine torque, vehicle weight, gear ratio, and tire size.

So with the supercharger it prolly did stall at 3400-3600 but now your making a substantial less amount of torque so thats why your seeing a stall speed of only 2400-2500.

You could contact Circle D and give them the specs of the truck and what you want the converter to do and they can make it stall at 3600 no problem. It will be a different diameter and have a different stator setup.

I get guys all the time wanting to buy a generic "3500 Stall" and then disappointment sets in when they realize it will only stall to 2000 rpms. When they could have spent a little more money and got a much better quality converter that stalls to what its suppose to.

My first converter was a used "3200", i didnt know any better back then. I put it in my turbo truck and it would brake stall to 5800 with just 6psi boost..

[001tuner]

So just because a converter is marketed as a 3400-3600, it all depends on engine torque, vehicle weight, gear ratio, and tire size.

So with the supercharger it prolly did stall at 3400-3600 but now your making a substantial less amount of torque so thats why your seeing a stall speed of only 2400-2500.

You could contact Circle D and give them the specs of the truck and what you want the converter to do and they can make it stall at 3600 no problem. It will be a different diameter and have a different stator setup.

I get guys all the time wanting to buy a generic "3500 Stall" and then disappointment sets in when they realize it will only stall to 2000 rpms. When they could have spent a little more money and got a much better quality converter that stalls to what its suppose to.

My first converter was a used "3200", i didnt know any better back then. I put it in my turbo truck and it would brake stall to 5800 with just 6psi boost..

Alright and I do apologize but thats confused me a bit. So by tight? I have a converter thats to big? Since Im not able to push the desired torque?

[RDF1]

Alright and I do apologize but thats confused me a bit. So by tight? I have a converter thats to big? Since Im not able to push the desired torque?

Not necessarily too big but it has the wrong stator setup for your current combo.
Convert diameter limits how loose they can make it stall. So they go to a smaller diameter to get more stall speed then change the stator setup to get it to stall where you want it to.
Once you figure out converter setups it is pretty cool how something so simple makes such a large difference in performance.

With the super charger if it made 400ftlb torque from 2000-4000 rpms then the converter would stall to say 3400-3600.
But now you have a cam 5.3 without boost so it may only make 225lbtq at 2000-4000 rpms so you dont have enough torque to get the converter to stall to 3400-3600 like the SC setup did.

[001tuner]

understood. that is pretty crazy to think about. here is a log of it wrapping out, weirdly before it wraps out it shows that it goes from 3rd to 1st gear. any idea on that?25-07-05 21-42-12.hpl

[001tuner]

understood. that is pretty crazy to think about. here is a log of it wrapping out, weirdly before it wraps out it shows that it goes from 3rd to 1st gear. any idea on that?25-07-05 21-42-12.hpl

Also one other thing, the previous owner swapped it from a 4160e to a 4180e and didn?t run the wires to the front speed sensor. Would that cause any issues?

[RDF1]

understood. that is pretty crazy to think about. here is a log of it wrapping out, weirdly before it wraps out it shows that it goes from 3rd to 1st gear. any idea on that?25-07-05 21-42-12.hpl

Yea its at the downshift point (37MPH and 45% tps) to go from 3rd to 1st gear
So it looks like you are letting off the accelerator pedal But the TPS is showing to be staying at 99%. At 6300rpms it shows 65% APP and 99.6% TPS.
Ive never seen that happen before and the ECM 33000 table looks to be factory.

Also one other thing, the previous owner swapped it from a 4160e to a 4180e and didn?t run the wires to the front speed sensor. Would that cause any issues?

Ive never tried to run a 4l80 without the ISS connected so im not sure about that.

[001tuner]

Yea its at the downshift point (37MPH and 45% tps) to go from 3rd to 1st gear
So it looks like you are letting off the accelerator pedal But the TPS is showing to be staying at 99%. At 6300rpms it shows 65% APP and 99.6% TPS.
Ive never seen that happen before and the ECM 33000 table looks to be factory.




Ive never tried to run a 4l80 without the ISS connected so im not sure about that.

It?s also showing 100% throttle but it doesn?t feel like it?s wide open if that makes sense. It feels like it?s opening up about 80%. Any ideas on how to correct the app tables to match the tps?

[RDF1]

Theres almost no difference in power from 80% tps to 100%tps.

I would start over with a factory tune to make sure something is going weird in that one.

[001tuner]

Theres almost no difference in power from 80% tps to 100%tps.

I would start over with a factory tune to make sure something is going weird in that one.

Understood, thank you.

[edcmat-l1]

As stated, you put an XXX stall in your vehicle, but then you went and reduced the low end torque the engine makes, which causes it to stall LESS.

PSA, most converter recommendations by the cam companies are based on how loose it needs to be to idle decent, not actually what it takes to get the engine in the "sweet spot" as in actual drag racing. If we use that approach 99% of them out there are too tight.

[RDF1]

As stated, you put an XXX stall in your vehicle, but then you went and reduced the low end torque the engine makes, which causes it to stall LESS.

PSA, most converter recommendations by the cam companies are based on how loose it needs to be to idle decent, not actually what it takes to get the engine in the "sweet spot" as in actual drag racing. If we use that approach 99% of them out there are too tight.

I agree 100%.