[Too Fast]

I have a 2010 5.7 R/T 6spd. Haven’t driven a 6.4 car, so I can’t speak for certain on those. I felt the 5.7 was quick but seemed to run out of steam around 4500 when I first got it.
I added a Diablosport 93 octane tune, moved the fuel cutoff up to 6400rpm, a 180 thermostat, the Sultan of Spark Coils with the wider plug gap, an 85mm throttle body, a Mopar CAI and SLP loudmouth Exhaust. I also added the Barton Shifter and removed the Clutch Delay Valve flow restriction.

I still don’t think I can beat a Scat Pack, but the car pulls much harder up top and will pull hard to 6k with these bolt ons. Definitely made it feel like a much faster car.

Just some ideas if you want to get a lil mpre out of a 5.7 hemi. In my case, I couldn’t swing 6.4 money at the time and this car was a fantastic deal.

Moving that fuel cutoff higher like you did will definitely help the 0-60. Our M6 forces a 2-3 upshift at 58 mph, fuel cutoff blues....and at least .2 slower because of that upshift. Our best from the timer is 5.1. Once. Usually 5.2-5.4. I think I read here somewhere that our 5.7 has a 5800 fuel cutoff.

 

[movnviol]

I didn't go for the SRT back in 2014 mainly because it was $10,000 more and after taking a RT for a test ride, it was plenty fast for the suburban roads, I wasn't going to race it and my insurance would be cheaper.

 

[2010RT 6spd]

Moving that fuel cutoff higher like you did will definitely help the 0-60. Our M6 forces a 2-3 upshift at 58 mph, fuel cutoff blues....and at least .2 slower because of that upshift. Our best from the timer is 5.1. Once. Usually 5.2-5.4. I think I read here somewhere that our 5.7 has a 5800 fuel cutoff.

Yeah I think my best 0-60 from the timer was 5.2, but I can’t get it to hook in first no matter what I do. Best times I was still spinning through first gear. Looks like drag radials will be the next upgrade.

 

[VQ4NFO]

stock for stock the 6.4 takes it the 5.7 has around 320-340whp while the scatpack has 420-440 whp big difference while the 5.7 has way more torque it gets out faster than the scatpack but top end just reels the 5.7 in but a full bolt on vs a stock scatpackbeats him everytime on a low roll 20-40 roll 5.7 win they are way more torquey and beat scats hands down but a high roll 50-60 the scats beat him because of the engine displacement a bit more top end then the 5.7 the 5.7 shines down low to mid rpm rangeso 5.7 can beat scatpacks and at a cheaper price then a new or even used price rage when modified correctly with a good tune I speak from experience

What?????? You do realize I hope that the reason the 6.4L has the short runner intake manifold, it because it gives the 6.4L more torque down LOW and when the short runner kicks in at 4800 rpms the hp continues to climb.
A stock 5.7L will dyno around 310 Ft-lb torque at the wheels at 3000 rpms, The 6.4L will have about 350 ft-lbs
At 4,500 rpms peak torque for the 5.7L is around 360 ft-lbs at the wheels. The 6.4L will top out at around 410 ft-lbs at the wheels.
Like I said earlier, the only thing keeping a Stock SRT or Scat Pack from a 3.9-4.1 0-60 time is the rear tires and wheels. Even many of the magazine drivers prefer the scat pack with the dynamics package (275's on the rear with 9.5" wheels) over the Hellcat in normal daily driving due to the torque down low the 6.4L has.

FWIW, even a full bolt on 5.7L, with the 6.4L intake manifold, a mild cam and longtubes would not beat a stock scat pack given the same driver experience. That was my initial set up for my 5.7L, would not beat the scat 0-60, 50-70 or quarter mile.

 

[TravisPNW]

I didn't go for the SRT back in 2014 mainly because it was $10,000 more and after taking a RT for a test ride, it was plenty fast for the suburban roads, I wasn't going to race it and my insurance would be cheaper.

That was exactly why I bought my 2015 R/T when I also test drove a 2015 Scat.

I make a lot more now than I did then and I traded it in a couple months ago on my 2022 Scat... and my insurance went up about $10 a month. I asked my insurance company why it went up so little and they said "because these newer cars have so many safety features and that's really what your rate is all about."

I didn't buy either car for racing... the R/T was great but the Scat is in a different league. I drove the R/T cross country and back last year and it was a pleasure... and I still like having the added power of the Scat.

 

[2010RT 6spd]

I didn't go for the SRT back in 2014 mainly because it was $10,000 more and after taking a RT for a test ride, it was plenty fast for the suburban roads, I wasn't going to race it and my insurance would be cheaper.

I love that Cuda style grille, looks good.

 

[CE9311]

What?????? You do realize I hope that the reason the 6.4L has the short runner intake manifold, it because it gives the 6.4L more torque down LOW and when the short runner kicks in at 4800 rpms the hp continues to climb.
A stock 5.7L will dyno around 310 Ft-lb torque at the wheels at 3000 rpms, The 6.4L will have about 350 ft-lbs
At 4,500 rpms peak torque for the 5.7L is around 360 ft-lbs at the wheels. The 6.4L will top out at around 410 ft-lbs at the wheels.
Like I said earlier, the only thing keeping a Stock SRT or Scat Pack from a 3.9-4.1 0-60 time is the rear tires and wheels. Even many of the magazine drivers prefer the scat pack with the dynamics package (275's on the rear with 9.5" wheels) over the Hellcat in normal daily driving due to the torque down low the 6.4L has.

FWIW, even a full bolt on 5.7L, with the 6.4L intake manifold, a mild cam and longtubes would not beat a stock scat pack given the same driver experience. That was my initial set up for my 5.7L, would not beat the scat 0-60, 50-70 or quarter mile.

Just to clarify, 6.4 has a dual runner intake. Long runners of same design as 5.7 below 4800 rpms, and valve that allow for a short runner for higher rpms, although it can still draw air through the long ones. You kinda made it seem the short runners are for down low rpms why I say this. I get what you meant but some may not.

I will also state the 5.7 intake has a kinda odd deal where air entering it from TB goes in about half way, and is funneled downwards where as the 6.4 has the angled neck and is open all the way through.

 

[GlockandRoll]

I believe motor trend tested the R/T challenger at 5.0 in the 0-60 and the Scat Pack at 3.9.
The 5.7 is high 13s in the 1/4, scat is low 12s.

Drag racing, that is a HUGE difference.

 

[Too Fast]

^^^yes indeed. .5 second quicker or 5 mph difference at the dragstrip is significant. Wish I could get mt WS6 to 60 ft, 6 weeks ago I trapped 109.6, but a dismal 13.07 ET. Oh well, I mow most of em down once I get into 2nd on up.

Our Shaker has only been once, 3X with a best if 14.1 @ 100.4 on a warm fall evening.

 

[VQ4NFO]

^^^yes indeed. .5 second quicker or 5 mph difference at the dragstrip is significant. Wish I could get mt WS6 to 60 ft, 6 weeks ago I trapped 109.6, but a dismal 13.07 ET. Oh well, I mow most of down once I get into 2nd on up.

Our Shaker has only been once, 3X with a best if 14.1 @ 100.4 on a warm fall evening.

You have a Firebird WS6 by chance? I was looking at the 2001 last weekend and thought that a cam and a set of longtubes in that LS1 would make it scream. (Looking for a second car to mod)

 

[Too Fast]

You have a Firebird WS6 by chance? I was looking at the 2001 last weekend and thought that a cam and a set of longtubes in that LS1 would make it scream. (Looking for a second car to mod)

Yep, since 2005. All it has is long tubes, a lid and Hooker muffler. Still running damn near 110 in the quarter and 27 mpg highway at 164k miles.

Kinda sorta thinking about heads/cam, for another 75ish hp. That would be cheaper than trading my wife's Shaker in on a 'scat Shaker, she waffles every month on that idea.

My car is on the left with the flaming bird front license area.

 

[RWL11]

Close, not close, times, whatever. Have you driven both? I’ve had both. The driving experience is def not close. The 392 is ridiculously more fun to drive. Drive them back to back and you won’t want to get back into the R/T.

I totally agree, the same feeling will overtake you if you drive a SP after a regular Scat Pack. You won't want to leave without the WB.

 

[66freeride]

"R/T is 375, is it not?"
Yes, I stand corrected. 345 is the displacement in cubic inches.

Didn't look that close to me. Guess it depends on what you consider "close".

You scared me I thought I got ripped off mine R T Classic is 5.7 (345) but I did go with the diablo I3 tuner and put the 93octane tune and MSD delete . Car runs better without the engine going to a 4 cylinder mode.

 

[SKT PK 9 Man]

Yep, since 2005. All it has is long tubes, a lid and Hooker muffler. Still running damn near 110 in the quarter and 27 mpg highway at 164k miles.

Kinda sorta thinking about heads/cam, for another 75ish hp. That would be cheaper than trading my wife's Shaker in on a 'scat Shaker, she waffles every month on that idea. View attachment 1053271
My car is on the left with the flaming bird front license area.

OT, but nice WS6. Love the Firebird/Firehawk models. My 2.

 

[TravisPNW]

Close, not close, times, whatever. Have you driven both? I’ve had both. The driving experience is def not close. The 392 is ridiculously more fun to drive. Drive them back to back and you won’t want to get back into the R/T.

Yep. I've had both as well. 392 is ridiculously more fun to drive.

Ridiculously.

I totally agree, the same feeling will overtake you if you drive a SP after a regular Scat Pack. You won't want to leave without the WB.

I never even considered the narrow body Scat... I was upgrading from the narrow body R/T and went straight for the widebody. More fun to drive with amazing handling. No regrets.

 

[Slowpoke392]

That was exactly why I bought my 2015 R/T when I also test drove a 2015 Scat.

I make a lot more now than I did then and I traded it in a couple months ago on my 2022 Scat... and my insurance went up about $10 a month. I asked my insurance company why it went up so little and they said "because these newer cars have so many safety features and that's really what your rate is all about."

I didn't buy either car for racing... the R/T was great but the Scat is in a different league. I drove the R/T cross country and back last year and it was a pleasure... and I still like having the added power of the Scat.

Yeah insurance rates barely change at all between models. People making purchase decisions based on that assumption are living in the past and missing the boat. These days you are basically insuring you the driver, and the vehicle is almost secondary. My Hellcat was $60/yr more than my SRT. And my four year newer Redeye is less than $100/yr more than my Hellcat was.

 

[19johned53]

Probably repeating myself, but....

Buy as much factory HP as you can afford. Then just drive the smiles out of it.

Totally more car than needed for the street, but the 392/A8 is a street beast.

Still totally happy with my old '16! 😀😃🙂

 

[TravisPNW]

Probably repeating myself, but....

Buy as much factory HP as you can afford. Then just drive the smiles out of it.

Totally more car than needed for the street, but the 392/A8 is a street beast.

Still totally happy with my old '16! 😀😃🙂

It's an absolute street beast the 392... and I also think it's the best value dollar for horsepower. "OMG you can't afford a Hellcat" they say... the hell I can't... but when it comes to payment I think $750 a month for the Scat is a much better dollar for horsepower value than the $1300-$1400 a month I'd be paying for the HC.

I get a greater laugh out of all the Youtube vids I see from the Hellcat owners... "I bought a used Hellcat." Why bro? Couldn't afford a new one? You bought a used HC for what I paid for a new Scat. Hope the previous owner didn't run it into the ground first.

I'd never even consider a used HC... or a used Scat... or a used R/T. No way.

 

[GlockandRoll]

Yeah insurance rates barely change at all between models. People making purchase decisions based on that assumption are living in the past and missing the boat. These days you are basically insuring you the driver, and the vehicle is almost secondary. My Hellcat was $60/yr more than my SRT. And my four year newer Redeye is less than $100/yr more than my Hellcat was.

This is not true.
In Austin, USAA, Farmers, and State Farm all wanted significant premiums as of 2019-2020 to insure a scat pack over a hellcat.
yes, you read that right.

I asked both the agents that I knew personally at State Farm and Famers, and they said it was likely because more jackasses buy scatpacks than hellcats, and as such, more are recked.

The Average hellcat owner is probably 15+ years older than the average scatpack owner, with a much better driving record and much less likely to wreck it.

I was shocked, but the difference in price was staggering.

 

[PRPRSSR]

This morning I watch a bunch of racing and drag videos of the R/T vs. the Scat.

It seems the that the R/T competes remarkably well with the Scat until you're well above the interstate's speed limit. Below that point, it takes a while for the Scat to gain enough over an R/T to pass it.

Would you say this is true of stock R/Ts, or was I mislead by the videos?

All depends. If I'm in My WBSP with the 305's, the Scat blows the RT off the line everytime!