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Tuned and Converted to Flex Fuel (2015 Silverado 5.3L)

Rawyzf
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Greg the leg Enthusiast

Greg the leg

Posted
Posted

I saw 125 mph on the dyno, lol! With my Denali 6.2.

In what gear, I'm not sure... Carl turned off the limiter.

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Rawyzf
Rawyzf

I'm not even sure where to start with this post, but here goes.   Last week I ordered the Flex Fuel Sensor and fuel lines/hose/clips for the conversion and then dropped the truck off at the Tuner.

SMiller
SMiller

I could care less if it only gained 5hp, just changing the shift points and torque management make it seem like 100hp gain.

Carl T
Carl T

Here you go, this is a 15 GMC 6.2 L86 A8 w/air intake. I was hoping for a stoker but it was as close as I could get.   Stock- 332/383 Tuned - 353/409 picked up 21whp and 26 ft/lbs over stock Tune

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Carl T Enthusiast

Carl T

Posted
Posted

 

Carl it looks like the wonders of Josh and Zane got you on the pay-for-play. Congrats on being a vendor.

 

They did, I am a truck fan and have been for a long time. I currently own a 05 2500hd with a Maggie (shop truck) and built a really fun leveled, turbo, 00 Silvy (DSLEATR). I have been looking at doing a nasty little 14/15 RCSB so I have been lurking on the site for a while. Summer is crazy busy but now I have a little more time to reconnect!

 

I've seen 3 different people post their *stock* CC 4wd 6.2L running 13.6 - 13.7. That .2 -.3 faster than my RCSB 5.3L E85, LT & tuned.

 

These GenV trucks get it on.

 

^^This, these high torque DI motors are perfect for trucks, really impressed with the performance!

 

I saw 125 mph on the dyno, lol! With my Denali 6.2.

In what gear, I'm not sure... Carl turned off the limiter.

 

5th gear, limiter is not turned of, just raised to a non-intrusive level!

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sprayed99 Enthusiast

sprayed99

Posted
Posted

I've seen 3 different people post their *stock* CC 4wd 6.2L running 13.6 - 13.7. That .2 -.3 faster than my RCSB 5.3L E85, LT & tuned.

 

These GenV trucks get it on.

I have seen numbers like that out of very lightly modded 6.2L trucks but not from factory stock trucks.

benjaminforeal Enthusiast

benjaminforeal

Posted
Posted

It's fun to go down the track in anything with balls. I'm itchin to bring mine... but the governor has been holding me back. I will have to tune it to increase the cutoff in order for me to even make a full pass. 92mph cutoff sucks! Probably some tires as well as there's now way it will hook with just 2wd. Trucks have come a long way though! SBC's have come a long way!!

 

92 mph cut off!? Dang..

 

I found out mine was limited at 99 mph on the interstate last weekend. I'm surprised to hear the Sierra would have different cut-off.

Sooperdave Enthusiast

Sooperdave

Posted
Posted

 

92 mph cut off!? Dang..

 

I found out mine was limited at 99 mph on the interstate last weekend. I'm surprised to hear the Sierra would have different cut-off.

It's the configuration/combination. Doesn't matter whether Chebby or Gimmy. I think mine is only 1 of a handful of this combo. Maybe one other on this board. I love rarity.

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sprayed99 Enthusiast

sprayed99

Posted
Posted (edited)

It's the configuration/combination. Doesn't matter whether Chebby or Gimmy. I think mine is only 1 of a handful of this combo. Maybe one other on this board. I love rarity.

My buddy Jason has a 14 6.2L Denali and did cut off at 92. Another friend Tyler's 15 6.2L Denali was at 99. Both truck are tuned now so their foot determines cut off :)

Edited by sprayed99
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Sooperdave Enthusiast

Sooperdave

Posted
Posted (edited)

My buddy Jason has a 14 6.2L Denali and did cut off at 92. Another friend Tyler's 15 6.2L Denali was at 99. Both truck are tuned now so their foot determines cut off :)

I can't say I've seen a Denali with that low of a cutoff. Usually they are 99. It is something only in the 14's and it's ones with the Max tow 6.2 from what I've seen. Which wasn't available to Denali. Who knows..

Edited by Sooperdave
Sooperdave Enthusiast

Sooperdave

Posted
Posted

I have seen numbers like that out of very lightly modded 6.2L trucks but not from factory stock trucks.

This guy is all stock accept a bed rug and tonneau cover, lol. Be sure to run thru whole post. He keeps getting faster. Prolly due to colder weather.

 

http://www.gm-trucks.com/forums/topic/177154-2015-silverado-goes-1397/

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sprayed99 Enthusiast

sprayed99

Posted
Posted

This guy is all stock accept a bed rug and tonneau cover, lol. Be sure to run thru whole post. He keeps getting faster. Prolly due to colder weather.

 

http://www.gm-trucks.com/forums/topic/177154-2015-silverado-goes-1397/

I don't doubt there are a few unicorns out there. It is still slow in my eyes, but to each their own. The car I'm toying with now should run a 8.99 or faster this weekend... Fingers crossed.

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Sooperdave Enthusiast

Sooperdave

Posted
Posted

I don't doubt there are a few unicorns out there. It is still slow in my eyes, but to each their own. The car I'm toying with now should run a 8.99 or faster this weekend... Fingers crossed.

There's always uni's. And of course conditions always which affect the DA. Sure 13's aren't fast for typical gearhead, but running some 13's in a 5500lb stock brick and get 20+mpg is impressive to me! Good luck with that 8sec beast!

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8secpumpgasdad Enthusiast

8secpumpgasdad

Posted
Posted

I have seen numbers like that out of very lightly modded 6.2L trucks but not from factory stock trucks.

I'm the guy with the highly modified 6.2( pace edwards tanneau cover and bedrug ) that runs 13's and yes, I think under the right conditions all the new 6.2 8 speeds will run the same. My cut off is 98 mph which limits my et also. The reason I say that is my friends 6.2 8 speed yukon denalli was running 14.0's the same night I ran 13.8's and on a cooler day i ran 13.7's which should of put him in the 13's if he would of ran the same day. His is unmodified also.

sprayed99 Enthusiast

sprayed99

Posted
Posted

I'm the guy with the highly modified 6.2( pace edwards tanneau cover and bedrug ) that runs 13's and yes, I think under the right conditions all the new 6.2 8 speeds will run the same. My cut off is 98 mph which limits my et also. The reason I say that is my friends 6.2 8 speed yukon denalli was running 14.0's the same night I ran 13.8's and on a cooler day i ran 13.7's which should of put him in the 13's if he would of ran the same day. His is unmodified also.

Do you feel better now?

SMiller Senior Enthusiast

SMiller

Posted
Posted (edited)

Bone stock brand new '14 6.2 6-speed 3.42 4x4 double cab, I let off at 111mph, don't know where the limit was.

 

 

 

Edited by SMiller
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