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Old 08-27-2009, 08:26 AM
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The performance results thread

I am creating a thread where we (and others) can post up information related to performance results for our systems as the information becomes available.

The type of data applicable would be track times and dyno results (please post an image of the dyno sheet and/or time slip if possible), in vehicle monitoring such as dashhawk, G-Force, etc, runs (post a picture if at all possible).

In the post title block, please include vehicle information, for example;

"5.7 Cherokee Turbo 6 psi Track Time"

Thanks
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Old 08-27-2009, 02:48 PM
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Tabulated Results Page

This page reserved for tabulated results.
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Home of the fastest 5.7 Cherokee, First 5.7 Cherokee to break into the 13's.
Best 0-60 MPH in 4.18 seconds! All stock internals 5.7 Hemi with a bolt on NCTS LLC turbo! Tuned via the iEMS3
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Old 08-30-2009, 10:53 PM
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NCTS 5.7 Cherokee Turbo 6 psi 0-60 MPH Time

I was out playing with the Jeep and the Dashhawk tonight and.....

0 - 60 MPH in 4.76 seconds!



Not to bad for an all stock 5.7 with a bolt on turbo system.

We will see what the 1/4 mile times are when we go to Monster Mopar Weekend in St. Louis.
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Home of the fastest 5.7 Cherokee, First 5.7 Cherokee to break into the 13's.
Best 0-60 MPH in 4.18 seconds! All stock internals 5.7 Hemi with a bolt on NCTS LLC turbo! Tuned via the iEMS3
Sharadon Performance Valve Body

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Old 08-30-2009, 11:54 PM
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Re: NCTS 5.7 Cherokee Turbo 6 psi 0-60 MPH Time

Quote:
Originally Posted by Tim@NCTSLLC View Post
I was out playing with the Jeep and the Dashhawk tonight and.....

0 - 60 MPH in 4.76 seconds!

Not to bad for an all stock 5.7 with a bolt on turbo system.

We will see what the 1/4 mile times are when we go to Monster Mopar Weekend in St. Louis.
WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 08-31-2009, 12:40 PM
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5.7 Cherokee compared to the SRT-8 Cherokee (drive specs)

5.7 Cherokee compared to the SRT-8 Cherokee (drive specs)

Let’s take a look at some of the specs between the two vehicles, and how they affect overall performance.

................................ SRT-8 .................................... 5.7 JGC

Curb Weight ............. 4819 ....................................... 4778

Axle drive ratio ......... 3.73 ....................................... 3.73

Weight Dist. F/R ....... 56/44 ...................................... 54/46

1st gear .................... 3.59 ....................................... 3.00

2nd gear ................... 2.19 ....................................... 1.67

3rd gear ................... 1.41 ....................................... 1.00

4th gear ................... 1.00 ....................................... 0.75

5th gear ................... 0.83 ....................................... 0.67

Final drive ratio ........ 3.1 ......................................... 2.50


So what do these numbers mean? The gear ratios in the SRT-8 were clearly selected for maximum performance whereas the transmission ratios in the 5.7 JGC were selected for economy. The SRT-8 ratios are evenly spaced, and it will shift much faster through the gears allowing the engine to rev faster. The SRT-8 starts out with a much lower ratio as well (3.59 versus 3.00), so the SRT-8 clearly has a better hole shot.

The 1st to 2nd shift is also a major difference. While the SRT-8 ratios are evenly spaced, the 5.7 JGC takes a big leap in 2nd gear ratio, 2.19 (SRT-8) versus 1.67 (JGC). This ratio and the 3rd gear ratio really slows down a stock 4.7 or 5.7, as it has to struggle more to pull through the gears and reach the next shift point with a much greater drop in rpm between shifts.

If there was a performance transmission option on the 5.7, it would make a big difference in overall performance.

So how do these numbers apply to the NCTS LLC Turbocharged 5.7 Cherokee? You have to keep in mind that due to the gear ratios, the turbocharged 5.7 will need to make more low end and midrange torque/HP to overcome the taller gear ratios to match up with the SRT-8 times.

4.76 seconds for a 0-60 time is very impressive as the JGC is pulling a taller gear ratio in 1st and 2nd than the SRT-8. So for this time to match a stock SRT-8 0-60 time, I must make more torque off the line to get the JGC moving and through the gears.

Experts I have talked with regarding the times, estimate that we are around 500 - 510 HP at the crank, and my times match up with the published times of a stock SRT-10 RAM that was at 505 HP at the crank, but with a much better gear spread in the transmission than the JGC.

Regarding a dyno, you would want to dyno the SRT-8 in 4th and the JGC in 3rd, as these are the 1/1 gears for the vehicles.

When considering modifications for your 5.7, you should lean towards those that are going to give you more low/mid range torque to help overcome your gear ratios in the transmission.
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Best 0-60 MPH in 4.18 seconds! All stock internals 5.7 Hemi with a bolt on NCTS LLC turbo! Tuned via the iEMS3
Sharadon Performance Valve Body

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  #6  
Old 08-31-2009, 05:15 PM
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Re: The performance results thread

Excellent info Tim,

As soon as I find a AWD Mustang Dyno I'll post up the results.

Escape
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Old 08-31-2009, 06:18 PM
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Re: The performance results thread

Tim, Can you please explain this futher? Thanks!

"Regarding a dyno, you would want to dyno the SRT-8 in 4th and the JGC in 3rd, as these are the 1/1 gears for the vehicles."
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Old 08-31-2009, 09:04 PM
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Re: The performance results thread

Quote:
Originally Posted by xoxSTUGOTSxox View Post
Tim, Can you please explain this futher? Thanks!

"Regarding a dyno, you would want to dyno the SRT-8 in 4th and the JGC in 3rd, as these are the 1/1 gears for the vehicles."
The majority of dyno pulls are done in whatever gear provides a 1/1 ratio. It helps so you are comparing apples to apples so to speak. If you dyno the JGC in 4th, you are going to be pulling through an overdrive gear which will skew the results.

---------- Post added at 10:04 PM ---------- Previous post was at 10:03 PM ----------

Quote:
Originally Posted by Escape View Post
Excellent info Tim,

As soon as I find a AWD Mustang Dyno I'll post up the results.

Escape
Just make sure those 31" BFG's are OFF! They are making your gear ratios even taller than stock.
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Best 0-60 MPH in 4.18 seconds! All stock internals 5.7 Hemi with a bolt on NCTS LLC turbo! Tuned via the iEMS3
Sharadon Performance Valve Body

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Old 08-31-2009, 09:33 PM
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Re: The performance results thread

Quote:
Originally Posted by Tim@NCTSLLC View Post
Just make sure those 31" BFG's are OFF! They are making your gear ratios even taller than stock.
No worries,

I have a line on some OEM SRT8 Rims. They are the lightest I can find so far, everything else I have found (that I like and doesn't cost an insane amount of cash) weighs a ton.

Escape
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Old 08-31-2009, 09:50 PM
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Re: The performance results thread

Quote:
Originally Posted by Tim@NCTSLLC View Post
The majority of dyno pulls are done in whatever gear provides a 1/1 ratio. It helps so you are comparing apples to apples so to speak. If you dyno the JGC in 4th, you are going to be pulling through an overdrive gear which will skew the results.
Got ya! Thank you!
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Old 10-13-2009, 10:04 PM
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NEW unofficial 1/4 mile time!

I went out tonight and run a 1/4 mile on the dashhawk just to see what it would do. The results?

12.77@107.5

This is a vast improvement over the results in St. Louis, pulling the ABS fuse is making a huge difference.

Now to get to the track and get an official time slip.

I did run an iEMS3 datalog, so I can go back and check the time stamp on it as well.

Looks like we are going to get that 12 second slip pretty quick!
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Home of the fastest 5.7 Cherokee, First 5.7 Cherokee to break into the 13's.
Best 0-60 MPH in 4.18 seconds! All stock internals 5.7 Hemi with a bolt on NCTS LLC turbo! Tuned via the iEMS3
Sharadon Performance Valve Body

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Old 10-14-2009, 01:22 AM
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Re: The performance results thread

Great information provided Tim!
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