Throttle body from Soler Performance

[Mike@SolerPrf]

And they keep getting better and better, now with bluetooth connectivity (App Control) for 2019+ Trucks.

 

 

[M1ck3y]

On 9/22/2021 at 9:39 AM, Mike@SolerPrf said:

And they keep getting better and better, now with bluetooth connectivity (App Control) for 2019+ Trucks.

 

 

lt4 tb still tunable on the lt1/l86?

 

[AZ_SS]

Are you still running the deal for a free controller with the purchase of a TB?

[Mike@SolerPrf]

M1ck3y, yes the LT4 is like the LT1 TB and the L86 in terms WOT size (91mm effective), the difference is that we port the LT4 more aggressively at partial throttle. I think for an L86, if still naturally aspirated, our LT1 is a better choice (no tune required but recommended depending on other mods). If supercharging then it is better to go straight for a larger WOT flow area like our LT5 (95+mm Effective) or our 103mm (107mm Effective) and tune.

 

Thanks,

[lucas287]

On 9/24/2021 at 9:09 AM, Mike@SolerPrf said:

yes the LT4 is like the LT1 TB and the L86 in terms WOT size (91mm effective), the difference is that we port the LT4 more aggressively at partial throttle.

 

Hmm - this is intriguing. Would you say the additional aggressiveness at part throttle would cause unwanted issues? Like lack of velocity or something? Seems to me that it would be a no-brainer for someone who has full access to HP Tuners to just use the LT4 variant and get all the part throttle airflow they can get. Especially since I'm only interested in drivability improvements. 

 

Now, since an engine is merely an air pump, having that additional airflow will have diminishing returns based on other factors such as valve events, exhaust flow/scavenging, and other intake restrictions. IE: it will only flow so much. 

[Grumpy Bear]

6 hours ago, lucas287 said:

 

Hmm - this is intriguing. Would you say the additional aggressiveness at part throttle would cause unwanted issues? Like lack of velocity or something? Seems to me that it would be a no-brainer for someone who has full access to HP Tuners to just use the LT4 variant and get all the part throttle airflow they can get. Especially since I'm only interested in drivability improvements. 

 

Now, since an engine is merely an air pump, having that additional airflow will have diminishing returns based on other factors such as valve events, exhaust flow/scavenging, and other intake restrictions. IE: it will only flow so much. 

 

That would be a carburetor thing. GDI could care less. Fuel isn't vaporized before the intake valve...right? It's atomized via extreme pressures and in the cylinder. 

 

As far as the fuel tables are concerned the volumetric efficiency of a GDI is based on the pressure in between the TB and the inlet valve. Not the atmosphere as would be the case with a carb, TBI or SPFI system. So any gain in MAP in the intake manifold translates to the cylinder in kind and like. 

 

I got schooled on this with the Harley Davidson SPI tuning software. If the TB is small the VE can still be 98% it's just 98% of a much less dense reference point.