Best 6.2 L fule?

[TRKLGND]

28 minutes ago, Jetiemann said:

I’m not sure on the tuning differences. Mines a 2017 didn’t think there was a difference other than the trans. I know the trans is locked on mine. I’m not familiar with the e10. What’s the octane rating on it? I always compare the e85 to 93 which is damn near a dollar cheaper around Houston. 
 

edit: I’ve seen e10, e15, e30. Assuming e10 is regular gas now (since most unleaded comes with up to 10% ethanol). I just wonder is the 87 octane rating factoring in the ethanol? Or is it actually something like 85octane boosted by ethanol? 

Currently there is no way to tune a '19 or '20.  GM has locked the CPU.  The trans remains locked as well.
Ethanol is just one octane booster added to gasoline.  Non ethanol gas just has different distillates added to achieve the desired octane rating.  

E85 is not comparable to 93 from an octane perspective (108 vs 93).
Today, in Springfield, IL,  87 is $1.25, 93 is $1.85 and E85 is $1.75.  That is from a station that sells all three.  Given the energy density (BTU) difference between E10 (octane rating makes no difference) and E85, E85 needs to be 30%-35% cheaper than E10 just to break even.  Therefore, E85 would need to be $1.30 to compete with 93 octane E10 or $.88 to compete with 87 E10.

[Jetiemann]

2 minutes ago, paracutin said:

Currently there is no way to tune a '19 or '20.  GM has locked the CPU.  The trans remains locked as well.
Ethanol is just one octane booster added to gasoline.  Non ethanol gas just has different distillates added to achieve the desired octane rating.  

 

E85 is not comparable to 93 from an octane perspective (108 vs 93).
Today, in Springfield, IL,  87 is $1.25, 93 is $1.85 and E85 is $1.75.  That is from a station that sells all three.  Given the energy density (BTU) difference between E10 (octane rating makes no difference) and E85, E85 needs to be 30%-35% cheaper than E10 just to break even.  Therefore, E85 would need to be $1.30 to compete with 93 octane E10 or $.88 to compete with 87 E10.

Well that’s where the difference is. E85 here is $1.41 where 93 is anywhere from $2.00-2.70. 
87 is $1.55. I will say the performance is more than just a few hp though and I think worth it in my case 

[TRKLGND]

35 minutes ago, Jetiemann said:

I agree. Time and time again I’ve hear people describe this more as a performance engine with the 6.0 bring the work horse. Now I guess it’s replaced by the 6.6 which makes 401/464 allegedly. It’s not about peak numbers. It’s about where it makes its torque. That doesn’t mean the L86 can’t be used for work successful. 

The main reason the 6.0 is seen as the workhorse is the fact that it uses an iron block.  Much more durable and less prone to heat related failure.  It is said that you can run the 6.0 harder (more rpm for a longer time) than the 6.2L without risk of failure.  
I have had trucks with both engines.  I never had the 6.0 in a 1500 however so trying to compare the two would be pointless.  Two different tools made for two different jobs.  Different but equal.

[TRKLGND]

3 minutes ago, Jetiemann said:

Well that’s where the difference is. E85 here is $1.41 where 93 is anywhere from $2.00-2.70. 
87 is $1.55. I will say the performance is more than just a few hp though and I think worth it in my case 

On a stock 5.3L flex fuel engine, E85 will give you an additional 21HP and 33 lb-ft of torque.

Unless you did a before and after dyno run you have no idea how much more power you are making with E85.  I am not saying it isn't worth it.  When is having more power a bad thing?! 

[Jetiemann]

7 minutes ago, paracutin said:

On a stock 5.3L flex fuel engine, E85 will give you an additional 21HP and 33 lb-ft of torque.

Unless you did a before and after dyno run you have no idea how much more power you are making with E85.  I am not saying it isn't worth it.  When is having more power a bad thing?! 

Seen dyno sheets claiming +59/65 Gains with e85 and tune alone on 6.2

[TRKLGND]

1 hour ago, Jetiemann said:

Seen dyno sheets claiming +59/65 Gains with e85 and tune alone on 6.2

On the 5.3, E85 adds 6% to HP and 8% to torque.  If you could run E85 without a tune in a 6.2L you would gain 25hp and 37lb-ft from the fuel alone.  I could see a tune being worth 34 more hp and 28 lb-ft over E85 alone.  Too bad you have to void your power train warranty to do it.  

[davidr83]

Hptuners can tune the T1s 5.3/6.2 engines but it's pricey and no trans tunning yet

 

 

[kgkern01]

So the guy that tuned my 6.2, just tuned a bone stock 6.2 on 93 octane, and my truck has just a cold air intake, heavier Ridge Grapplers, and the E85 conversion, and the bone stock after tuning the stock truck made 358rwhp/405 rwtq, mine made 380 rwhp/435 rwtq (on 65% ethanol per meter).  So a gain of 22rwhp/30rwtq.  The extra 30ft/lb of torque is noticeable.  Since the tune I have been running E85 exclusively, except for a road trip I went on a couple weeks ago, I ran 93.  The lesser power was noticeable on the 93.

[TRKLGND]

25 minutes ago, dram1983361 said:

Hptuners can tune the T1s 5.3/6.2 engines but it's pricey and no trans tunning yet

 

 

You have to send them your ECM to be physically modified or purchase an ECM from them that has been physically modified.
Just a bit out of my comfort zone for 30HP.  

[Cpl_Punishment]

On 4/28/2020 at 10:38 AM, Jetiemann said:

I’m not sure on the tuning differences. Mines a 2017 didn’t think there was a difference other than the trans. I know the trans is locked on mine. I’m not familiar with the e10. What’s the octane rating on it? I always compare the e85 to 93 which is damn near a dollar cheaper around Houston. 
 

edit: I’ve seen e10, e15, e30. Assuming e10 is regular gas now (since most unleaded comes with up to 10% ethanol). I just wonder is the 87 octane rating factoring in the ethanol? Or is it actually something like 85octane boosted by ethanol? 

 

Yes, the refineries blend it so the finished product with 10% ethanol in it is 87 octane.