2002 4.7 HO vs 2015 5.7 - Jeep Garage - Jeep Forum

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  #1  
Old 04-27-2015, 08:45 PM
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2002 4.7 HO vs 2015 5.7

Which is quicker 0-60?

A quick google search shows the 4.7 is quicker. That possible?


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  #2  
Old 04-27-2015, 09:26 PM
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Re: 2002 4.7 HO vs 2015 5.7

Compare the weight of the two vehicles in addition to other factors...
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Old 04-27-2015, 11:51 PM
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Re: 2002 4.7 HO vs 2015 5.7

My '14 Summit 5.7l replaced my '02 Limited 4.7HO with K&N CAI and the 4.7HO, also with Quadra Drive, was snappier and faster (0-60 ish) but my 5.7l would eat it a bit in the mid-range especially with my Corsa Cat-Back exhaust and Volant/Corsa CAI opening things up in the mid-range.
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Old 04-28-2015, 12:37 AM
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Re: 2002 4.7 HO vs 2015 5.7

The '02 also had a much stiffer 3.73 rear end ratio compared to the Hemi's much taller 3.09
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Old 04-28-2015, 12:49 AM
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Quote:
Originally Posted by 2014RedHemiGC View Post
The '02 also had a much stiffer 3.73 rear end ratio compared to the Hemi's much taller 3.09
Thanks for focusing on the right thing....I knew I was forgetting my main point about my quicker 4.7HO...jeez...doing that made it sound like i thought the CAI was the reason and as you said, the gearing was the huge diff and that is truly what I meant to focus on...
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Old 04-28-2015, 01:31 PM
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Re: 2002 4.7 HO vs 2015 5.7

I loved our '02 Overland HO with its "chrome" exhaust tip. But no matter how easy I drove it, it just wouldn't get better than 18 mpg. Love the current V8 with almost 100 more HP and the ability to easily get over 20 mpg.
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Old 04-28-2015, 01:37 PM
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Re: 2002 4.7 HO vs 2015 5.7

Quote:
Originally Posted by 2014RedHemiGC View Post
I loved our '02 Overland HO with its "chrome" exhaust tip. But no matter how easy I drove it, it just wouldn't get better than 18 mpg. Love the current V8 with almost 100 more HP and the ability to easily get over 20 mpg.
True but since my Summit Hemi is more "fun" with the Corsa I just cannot get over 12.5 mpg longterm avg for me (90% city). My wife, however, consistently averages 22-23 (90% highway)....
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Old 04-28-2015, 02:14 PM
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Re: 2002 4.7 HO vs 2015 5.7

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Originally Posted by 14SummitHemi View Post
My wife, however, consistently averages 22-23 (90% highway)....
no she doesn't
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Old 04-28-2015, 02:16 PM
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Re: 2002 4.7 HO vs 2015 5.7

Quote:
Originally Posted by 2014RedHemiGC View Post
The '02 also had a much stiffer 3.73 rear end ratio compared to the Hemi's much taller 3.09
but the 8HP70 transmission has a much lower first gear ratio, so the overall 1st ratio is 14.55 with the 3.09 rear.. the 545RFE and 3.73 comes out to 11.19 by my math.

The '02 probably has smaller-diameter tires, which helps acceleration.. and the '02 is probably quite a bit lighter...

just MHO..

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Old 04-28-2015, 03:11 PM
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Re: 2002 4.7 HO vs 2015 5.7

What are these numbers you've found?

Not that this is race car but I find this hard to believe
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Old 04-28-2015, 03:16 PM
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Quote:
Originally Posted by 2014wk2 View Post

no she doesn't
I don't doubt my wife and you shouldn't either

But seriously it is correct...I've hand verified the EVIC...she is the ultimate in steady Eddie driving and virtually all highway.....
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Old 04-28-2015, 04:39 PM
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Re: 2002 4.7 HO vs 2015 5.7

I raced my dad's '03 4.7L against my '11 5.7L and the '11 stomped the '03 by about 1 1/2 lengths to 80MPH. Off the line the 4.7L was even but once you get up into the power band it is game over.
Now my brothers '98 5.9L was a different story. The '98 5.9L beat the '11 5.7L by about 1/2 car lengths to 80MPH. The 5.9L was brutal off the line and kept pulling. My '11 starting closing the gap at the very end but the race was over. We even raced on gravel and the 5.9L flat stomped the 5.7L.
I told my brother he cheated but deep down I know his jeep was faster.
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