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hello so i have a 08 charger 5.7l making 340 to the crank, i was wondering if LT headers and a tune will let me beat 11-14 charger 5.7 and if so what all do i need lol thanks
 

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The easiest mod would be to buy a 2009 with the Eagle engine that has Variable Valve Timing (VVT) or even better, a 2015+ with the eight speed transmission, the 8 speed makes a world of difference over the old NAG1 five speed. My 2016 V6 with the 8 speed stays right with 2006-08' Chargers up to 70 mph before they finally pull away...the 2009+ models always stomp my arse, and BADLY!
 

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I watched a video last night on a dyno run with a ‘16-‘17 R/T with pure bolt on mods:
6.4 intake manifold
Long tubes
CAI
3.09 LSD
Exhaust
Tune

He was putting 375 HP/ 405 torque to the tires. Probably 425/445 at the crank. Those are fairly basic mods I would wager that most of us do if we are into our cars, so there’s a decent chance if you line up next to a later model 5.7, they will have one/a few basic mods... in that case you may need to consider adding serious power with a cam.
 

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hello so i have a 08 charger 5.7l making 340 to the crank, i was wondering if LT headers and a tune will let me beat 11-14 charger 5.7 and if so what all do i need lol thanks
No not even close lol. Maybe if you swapped to a 3.73 or 3.92 Getrag, but you are still outclassed in cylinder heads, intake manifold, cam timing, VVT and compression. You have slightly less weight. Minimum you'd need a gear swap and a hotter cam to be a threat, assuming the car you're racing is stock.
Assuming it's a stock eagle 5.7, then you will want to swap cylinder heads (you have choices, eagles being the cheapest), upgrade intake manifold (best options being eagle or 6.1, or you could bop the 392 manifold on at this point), definitely a cam and gears (at least a 3.06) to go with your exhaust and tune. It is doable, but it also depends on how streetable you want it. I know a guy with an 08 with his stock displacement pre-eagle 5.7 with all the mods I listed above except he went with a 3.73 Getrag. It runs high 11's.

I watched a video last night on a dyno run with a ‘16-‘17 R/T with pure bolt on mods:
6.4 intake manifold
Long tubes
CAI
3.09 LSD
Exhaust
Tune

He was putting 375 HP/ 405 torque to the tires. Probably 425/445 at the crank.
Not surprising, stock NA 3G & 4G hemi's have ridiculously small cams and the factory tuning leaves a bit on the table as well. Those heads are good for 600hp NA. Plus an active intake manifold is the biggest difference between a 370-375hp car 5.7 & the 390-395hp truck 5.7. Truck intake and 392 intake are very similar. Definitely more related to each other than the car intake.
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Reader's Digest version: There's no cheap way to get where you indicated you wanted to be. It's not only the horsepower that you need to overcome as you can see above.

Best,
 

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Having recently gone from my 2006 R/T R&T to my 2019 R/T the difference is vast. It is hard for me to split what is attributable to the 8-speed alone (a large portion for sure since it has deeper gears) but the Eagle head also makes a huge difference. My R/T R&T was rated at 350 hp (they had the larger intake and single pass muffler) but the Eagle head feels much stronger than 370 would suggest. I ran a Diablo 91 CAI tune on that 2006 but power is noticeably up on the 2019.

The other day from a stop light I ran a 5.2 to 60 and that was simply rolling into the throttle with a touch of wheel spin. This was on a regular bumpy street in 85 degree heat.

The 2015+ R/T can run with the 2006-2010 SRT 6.1 and stock for stock it is pretty tight.

I'm glad I left the Scat Pack for a future car... I just hope they keep making them another 5-6 years because I generally keep cars 8-10 years! I'm afraid in 2026 or beyond they'll all be turbo inline 6 but maybe if they come in 400hp+ and 500hp+ tunes I won't complain!
 

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Having recently gone from my 2006 R/T R&T to my 2019 R/T the difference is vast. It is hard for me to split what is attributable to the 8-speed alone (a large portion for sure since it has deeper gears) but the Eagle head also makes a huge difference. My R/T R&T was rated at 350 hp (they had the larger intake and single pass muffler) but the Eagle head feels much stronger than 370 would suggest. I ran a Diablo 91 CAI tune on that 2006 but power is noticeably up on the 2019.

The other day from a stop light I ran a 5.2 to 60 and that was simply rolling into the throttle with a touch of wheel spin. This was on a regular bumpy street in 85 degree heat.

The 2015+ R/T can run with the 2006-2010 SRT 6.1 and stock for stock it is pretty tight.

I'm glad I left the Scat Pack for a future car... I just hope they keep making them another 5-6 years because I generally keep cars 8-10 years! I'm afraid in 2026 or beyond they'll all be turbo inline 6 but maybe if they come in 400hp+ and 500hp+ tunes I won't complain!
that’s very true. My buddy has a 2010 SRT8 and he cannot pull on me or take me off the line.
 

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The 2015+ R/T can run with the 2006-2010 SRT 6.1 and stock for stock it is pretty tight.
That was the driving force behind the 392...that 370hp with a good set of heads and VVT wasn't so far behind the top dog 6.1's 425hp anymore, though a good cam in the 6.1 changes that lol. But a mildly modified eagle against a stock 6.1 is close; gotta love technology lol. Add a rear gear change and pack on the 8sp and forget it. Now go jump in a 392 and see how much more fun the extra 100hp is lol.

that’s very true. My buddy has a 2010 SRT8 and he cannot pull on me or take me off the line.
Not surprising.
 

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That was the driving force behind the 392...that 370hp with a good set of heads and VVT wasn't so far behind the top dog 6.1's 425hp anymore, though a good cam in the 6.1 changes that lol. But a mildly modified eagle against a stock 6.1 is close; gotta love technology lol. Add a rear gear change and pack on the 8sp and forget it. Now go jump in a 392 and see how much more fun the extra 100hp is lol.


Not surprising.
I bought a 1996 Impala SS in 2000 thinking this is it, my last chance to get a big RWD V8 car. I've always been a Mopar guy and followed the LX development and birth and growth. I bought that 2006 R/T R&T in 2011 for the same price as the Impala SS but now I had 350 HP and a 5 speed instead of 260 HP and a 4 speed.

Fast forward to now with the 370 HP and 8 speed... with UConnect, ventilated seats, HIDs etc. The march of technology is great... and that active exhaust!!

Sometime in 2029 I'll start looking for a 2024-2028 Charger Scat Pack ;)

Eventually there will be a new platform with inline 6s from what the rumor say... top end may retain the V8 we'll see. I could get used to a 3.5 liter I6 with twin turbos and 515 HP in the 2028 Charger R/T Scat Pack, especially if it was 3,900 pounds! Just don't make it any smaller us big guys like big cars!
 
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