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  #109  
Old 12-13-2015, 10:48 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

I'm thinking it's all in the trans. I'm coming from the 3.6 but if I shift the trans manually, it will pull fine. If I leave it in auto it wants to start in 2nd off the line unless I get on it to force a kick down.

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  #110  
Old 12-21-2015, 11:42 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

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Originally Posted by Snipe315 View Post
While you're probably not looking to upgrade the whole vehicle...

I strongly suggest you test drive a 2015 V8. I traded up my V8 powered 2012 Overland for a 2015 version. The difference is HUGE. 0-60 times are over a second faster in stock form. The 8-speed transmission is amazing when paired to this V8.

"HUGE" is a slight exaggeration. Car and Driver got a 6.5 0-60 on a '14 5.7 Limited, same as the OP gets now.
I wonder if there is any header/high-flow cat combo that would make a noticeable difference while still keeping it legal?
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  #111  
Old 12-21-2015, 11:54 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

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Originally Posted by 2014RedHemiGC View Post
The axle ratio for the older Hemi's was 3.73 compared to the much taller 3.09 ratio used currently for better fuel economy. That taller ratio adversely affects acceleration, although the 8 speed's ratios help somewhat.

My Jeep weighs almost 5200 lbs. Edmonds must have had The entire staff inside that Challenger on the scales!
yes, the mandatory 5.7/3.09 available today is disappointing. EPA figures, sure, but I should think the 8sp could compensate for a lower (numerically higher) final drive ratio.
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  #112  
Old 12-21-2015, 11:57 PM
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Quote:
Originally Posted by Nikita View Post
yes, the mandatory 5.7/3.09 available today is disappointing. EPA figures, sure, but I should think the 8sp could compensate for a lower (numerically higher) final drive ratio.
Absolutely it could since it already does it in the SRT, as u say, EPA mpg rating won that battle.
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  #113  
Old 12-22-2015, 05:44 AM
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Re: 5.7L Hemi - where's the horsepower hiding?

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Originally Posted by 14SummitHemi View Post
Absolutely it could since it already does it in the SRT, as u say, EPA mpg rating won that battle.
so next question: could the SRT's 3.70 diffs be swapped into a Limited 5.7? (front and rear I assume).
I'd like to find an SRT ('14 or newer) in a wrecking yard and cherry pick it to death.
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  #114  
Old 12-22-2015, 07:07 AM
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Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by Snipe315 View Post
I strongly suggest you test drive a 2015 V8. I traded up my V8 powered 2012 Overland for a 2015 version. The difference is HUGE. 0-60 times are over a second faster in stock form. The 8-speed transmission is amazing when paired to this V8.
Here I have to agree. The other day I went for a ride with my neighbor in his Dodge Ram 5.7 HEMI pickup. It has the 6-Speed transmission, not the 8-Speed. The difference in acceleration was HUGE! This in spite of the fact the HEMI in the Ram pickup has a higher horsepower rating. My 2015 HEMI with 360H.P. and the 8-Speed was very noticeably quicker to 60 MPH.
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  #115  
Old 12-22-2015, 07:48 AM
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Re: 5.7L Hemi - where's the horsepower hiding?

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Originally Posted by billt View Post
Here I have to agree. The other day I went for a ride with my neighbor in his Dodge Ram 5.7 HEMI pickup. It has the 6-Speed transmission, not the 8-Speed. The difference in acceleration was HUGE! This in spite of the fact the HEMI in the Ram pickups has a higher horsepower rating. My 2015 HEMI with 360H.P. and the 8-Speed was very noticeably quicker to 60 MPH.

Not if you have a RIPP Supercharger in it.......😜. JK, I know we're talking about stock here. But just got mine back and there is a ~"HUGE"~ difference.
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  #116  
Old 12-22-2015, 08:40 AM
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Quote:
Originally Posted by billt View Post

Here I have to agree. The other day I went for a ride with my neighbor in his Dodge Ram 5.7 HEMI pickup. It has the 6-Speed transmission, not the 8-Speed. The difference in acceleration was HUGE! This in spite of the fact the HEMI in the Ram pickup has a higher horsepower rating. My 2015 HEMI with 360H.P. and the 8-Speed was very noticeably quicker to 60 MPH.
Your jeep also don't weight 6k plus lol
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  #117  
Old 12-22-2015, 01:14 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

First post for me on this site but it seems like the guy who's ticked his Hemi doesn't throw him in his seat is overlooking the fact that the gear ratio is different when you get the Hemi and the towing package. The towing package put the taller gears in to help keep gears while towing.

You complained about the X5M and Porsche but both of those are more performance SUVs, aka the SRT Grand Cherokee. You don't see the X5M towing 7,400 lbs. now do ya.

I just need to get the Corsa cat-back exhaust to bring a better Hemi growl out and I'm golden.

BTW I have a 2013 loaded Limited 4x4.
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  #118  
Old 12-22-2015, 01:16 PM
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5.7L Hemi - where's the horsepower hiding?

The Ram 1500 does not weigh more 6k. 5,500lbs maybe. The difference in HP should make up for the weight difference. 8 speed transmission is significantly better in the GC for WOT acceleration.
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  #119  
Old 12-22-2015, 02:18 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

On the cheap, a good tuner (ex. diablosport) and custom tune, you will notice a difference, especially if you have already gone the intake/exhaust route.

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  #120  
Old 12-22-2015, 06:26 PM
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Re: 5.7L Hemi - where's the horsepower hiding?

Quote:
Originally Posted by peka1407 View Post
First post for me on this site but it seems like the guy who's ticked his Hemi doesn't throw him in his seat is overlooking the fact that the gear ratio is different when you get the Hemi and the towing package. The towing package put the taller gears in to help keep gears while towing.



You complained about the X5M and Porsche but both of those are more performance SUVs, aka the SRT Grand Cherokee. You don't see the X5M towing 7,400 lbs. now do ya.



I just need to get the Corsa cat-back exhaust to bring a better Hemi growl out and I'm golden.



BTW I have a 2013 loaded Limited 4x4.

I would go Borla....I have it and in my opinion it's got the perfect sound. Best of both worlds. Not over powering yet it does have a growl when your moving.
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