No way - NOT on 87 octane fuel . . .

If there's one thing the 6.2 loves even more than 1 7/8" headers - it's OCTANE!
As an example - the L92 export trucks tuned for 95 octane fuel were factory rated @ 441 HP @ the crankshaft!

My guess - if the dyno is properly calibrated - 350 corrected RWHP.

 

I may go back for a 93 oct Tune. Lol

 

Maybe, maybe not. I didn't know he was running 87 when I made my guess but I could still see him gaining 30RWHP so I will keep my number.

I would definately run that 6.2 on premium, just couldn't leave power on the table over the small price difference vs regular unleaded.

 

If it makes over 350 on 87, I'd ask that the dyno be re-calibrated, LOL!

Not dissin' your deal there, Mike - but the 6.2 is extremely octane sensitive . . .

Be sure that the tuner observes and logs KR during your pulls!

 

What did yours put down before LTs Lloyd?

 

Robert - I wish that I had baselined it prior to the headers, but I did not.

Pat mentioned that compared to his wife's '08 Yukon Denali, mine dynoed a solid 30 RWHP higher, so I suppose my LTs are worth 30 RWHP by themselves.

 

export version here i remember doing 257 awhp @ 5800 rpm stock.. on a mustang dyno

 

Which also falls into what all the 5th gen Camaro guys are seeing. About 30 more HP from quality LTs. I wont be shocked to see the OP gain the same even without the premium gas just because his baseline was also on regular. Just too many variables to really compare his final numbers to yours(gears, wheels and dyno differences especialy).

 

Results
87 oct
370 hp 391tq

Tuner said 93 would gain 10-15 hp
I'll prolly go back for another tune

Unbolted cutback it actually lost hp. He never said how many though

 

wow i want a 6.2