JLT - Before/After results

[QWK SVT]

As stated in my previous thread, JLT got the package to me in record time:
http://www.mercurymarauder.net/forums/showthread.php?t=17767

I've now installed the kit, and put my thoughts to keyboard:

I could provide detailed instructions on how to install the kit, but the one's Jay provides are as good as anything I could do. It's really a simple process - remove the old filter assembly and intake tube, and install the new one. If you can turn a screwdriver and use a socket set, you're good to go! The kit fits like a glove - here it is, in the car (I know - I need to clean up, under the hood):

So, was it worth it? You bet! The engine can be heard - it's louder, and a bit more of a growl. The car feels stronger, and definitely spins the wheels, a little easier.

I performed a before / after 0 - 60 test, to validate the increases that this kit provides. It should be noted, my test procedure will not elicit the car's best results possible. I'll test that, at a later date. The plan is to remove as many variables as possible and make the tests as apples-apples, to identify the net change, caused by the JLT. Here's how I did it:

1. Full tank of gas, to remove any weight differences
2. Drive a set route (~10 miles) to bring the car up to full operating temperature
3. visit private track
4. Average of four 0-60mph runs, alternating direction (consistent launch technique, feathering in from 1500rpm)
5. Go home
6. Install JLT and allow for a short break
7. same set route as before, bringing the car back to full temp, again
8. visit private track
9. Again, average of four 0-60mph runs, alternating direction (same launch technique)
10. Go home
11. Post results

So, what were the end results?
<TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Average</TD><TD width=54>

7.27​

</TD></TR><TR><TD>JLT Average</TD><TD>

6.93​

</TD></TR><TR><TD>Difference</TD><TD>

0.33​

</TD></TR></TBODY></TABLE><TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Best</TD><TD width=54>

6.97​

</TD></TR><TR><TD>JLT Best</TD><TD>

6.70​

</TD></TR><TR><TD>Difference</TD><TD>

0.27​

</TD></TR></TBODY></TABLE>

In both instances, the first run was the best. The then heat soaked engine would then settle down at a higher overall time. Oddly enough, the times showed less variation, with the JLT...

Bottom line - this is a must do mod. For the minimal cost (well under $200) and effort (under an hour, with breaks), the JLT offers a pretty impressive increase, even on my otherwise stock Marauder. If that's any indication of how the JLT will perform at a drag strip, I'd be super pleased! I can't wait to see, for real. :burnout:

 

[fastblackmerc]

As stated in my previous thread, JLT got the package to me in record time:
http://www.mercurymarauder.net/forums/showthread.php?t=17767

I've now installed the kit, and put my thoughts to keyboard:

I could provide detailed instructions on how to install the kit, but the one's Jay provides are as good as anything I could do. It's really a simple process - remove the old filter assembly and intake tube, and install the new one. If you can turn a screwdriver and use a socket set, you're good to go! The kit fits like a glove - here it is, in the car (I know - I need to clean up, under the hood):

So, was it worth it? You bet! The engine can be heard - it's louder, and a bit more of a growl. The car feels stronger, and definitely spins the wheels, a little easier.

I performed a before / after 0 - 60 test, to validate the increases that this kit provides. It should be noted, my test procedure will not elicit the car's best results possible. I'll test that, at a later date. The plan is to remove as many variables as possible and make the tests as apples-apples, to identify the net change, caused by the JLT. Here's how I did it:

1. Full tank of gas, to remove any weight differences
2. Drive a set route (~10 miles) to bring the car up to full operating temperature
3. visit private track
4. Average of four 0-60mph runs, alternating direction (consistent launch technique, feathering in from 1500rpm)
5. Go home
6. Install JLT and allow for a short break
7. same set route as before, bringing the car back to full temp, again
8. visit private track
9. Again, average of four 0-60mph runs, alternating direction (same launch technique)
10. Go home
11. Post results

So, what were the end results?
<TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Average</TD><TD width=54>

7.27​

</TD></TR><TR><TD>JLT Average</TD><TD>

6.93​

</TD></TR><TR><TD>Difference</TD><TD>

0.33​

</TD></TR></TBODY></TABLE><TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Best</TD><TD width=54>

6.97​

</TD></TR><TR><TD>JLT Best</TD><TD>

6.70​

</TD></TR><TR><TD>Difference</TD><TD>

0.27​

</TD></TR></TBODY></TABLE>

In both instances, the first run was the best. The then heat soaked engine would then settle down at a higher overall time. Oddly enough, the times showed less variation, with the JLT...

Bottom line - this is a must do mod. For the minimal cost (well under $200) and effort (under an hour, with breaks), the JLT offers a pretty impressive increase, even on my otherwise stock Marauder. If that's any indication of how the JLT will perform at a drag strip, I'd be super pleased! I can't wait to see, for real. :burnout:

I think the JLT is the best horsepower mod for the money.

 

[GA-Marauder]

Bottom line - this is a must do mod. For the minimal cost (well under $200) and effort (under an hour, with breaks), the JLT offers a pretty impressive increase, even on my otherwise stock Marauder. If that's any indication of how the JLT will perform at a drag strip, I'd be super pleased! I can't wait to see, for real. :burnout:[/QUOTE]
Nice results. I too have the JLT, and IMO it is a noticeable improvement. What type of instrument are you using to measure times? G-tech? Stopwatch? Just wondering.

 

[Shaft333]

Is it tearing up the hood insulation?

The price is right for this kit, and it does appear that it offers a bit of performance. In other words it's tempting to break my self inflicted keep it stock rule. And then I learn they tear up the hood liner.
Yeah, yeah, I'm fussy.

 

[twolow]

Thanks for the detailed results! This mod has now been bumped up my to-do list

 

[valleyman]

Is it tearing up the hood insulation?

The price is right for this kit, and it does appear that it offers a bit of performance. In other words it's tempting to break my self inflicted keep it stock rule. And then I learn they tear up the hood liner.
Yeah, yeah, I'm fussy.

Mine has been on my MM for 6k miles and doesn't touch the hood liner.

 

[SergntMac]

I'm not buying this crap for one second, the test is bogus because you forgot to top off the tank between the before and after testing, and gasoline weighs 8 pound a gallon!




Hehehe...Just kidding...Congrats, and a job well done. Very imformative, and a good example to all on how to do a field test.

 

[poorjoe]

Shaft 333. Mine has been in for 8 months, and has never touched the hood. If it is installed properly you shouldn't have a problem. Every JLT kit that Jay sells is the same, so i can't understand why it would touch the hood on some MM's, and not others, all things being equal.

Joe.

 

[Deebar]

Geat job QWK SVT!!! A true performance mod that just looks sweeet! Jay does a really good job painting these, being the exact same color as the rest of the car and all. Looks like it came with the car. Congrats!

 

[Big House]

Worry not about the hood liner. Worry more about running at WOT all the time because this kit makes the engine sound so swwwwwwweeeeeeeeeeettttttttttt. Anything about 3000 growls so nice you want to do it all the time. Do it and you will not be sorry. And as for as the hood liner...If it touches it...who is going to see it anyway.

 

[Flatpicker]

As stated in my previous thread, JLT got the package to me in record time:
http://www.mercurymarauder.net/forums/showthread.php?t=17767

I've now installed the kit, and put my thoughts to keyboard:

I could provide detailed instructions on how to install the kit, but the one's Jay provides are as good as anything I could do. It's really a simple process - remove the old filter assembly and intake tube, and install the new one. If you can turn a screwdriver and use a socket set, you're good to go! The kit fits like a glove - here it is, in the car (I know - I need to clean up, under the hood):

So, was it worth it? You bet! The engine can be heard - it's louder, and a bit more of a growl. The car feels stronger, and definitely spins the wheels, a little easier.

I performed a before / after 0 - 60 test, to validate the increases that this kit provides. It should be noted, my test procedure will not elicit the car's best results possible. I'll test that, at a later date. The plan is to remove as many variables as possible and make the tests as apples-apples, to identify the net change, caused by the JLT. Here's how I did it:

1. Full tank of gas, to remove any weight differences
2. Drive a set route (~10 miles) to bring the car up to full operating temperature
3. visit private track
4. Average of four 0-60mph runs, alternating direction (consistent launch technique, feathering in from 1500rpm)
5. Go home
6. Install JLT and allow for a short break
7. same set route as before, bringing the car back to full temp, again
8. visit private track
9. Again, average of four 0-60mph runs, alternating direction (same launch technique)
10. Go home
11. Post results

So, what were the end results?
<TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Average</TD><TD width=54>

7.27​

</TD></TR><TR><TD>JLT Average</TD><TD>

6.93​

</TD></TR><TR><TD>Difference</TD><TD>

0.33​

</TD></TR></TBODY></TABLE><TABLE borderColor=#000000 width=200 border=1><TBODY><TR><TD width=130>Stock Best</TD><TD width=54>

6.97​

</TD></TR><TR><TD>JLT Best</TD><TD>

6.70​

</TD></TR><TR><TD>Difference</TD><TD>

0.27​

</TD></TR></TBODY></TABLE>

In both instances, the first run was the best. The then heat soaked engine would then settle down at a higher overall time. Oddly enough, the times showed less variation, with the JLT...

Bottom line - this is a must do mod. For the minimal cost (well under $200) and effort (under an hour, with breaks), the JLT offers a pretty impressive increase, even on my otherwise stock Marauder. If that's any indication of how the JLT will perform at a drag strip, I'd be super pleased! I can't wait to see, for real. :burnout:

Would you happen to know how the JLT kit compares to the K&N. It sure is a sweet deal and looks great!

 

[MM03MOK]

Would you happen to know how the JLT kit compares to the K&N. It sure is a sweet deal and looks great!

Feel free to do a search. That has been covered in other threads. Keep this one on topic, please. No flames.

 

[Marauder2005]

Is it tearing up the hood insulation?

The price is right for this kit, and it does appear that it offers a bit of performance. In other words it's tempting to break my self inflicted keep it stock rule. And then I learn they tear up the hood liner.
Yeah, yeah, I'm fussy.

3,000 miles with the JLT nothing but pure enjoyment hoodliner is in 100%

 

[Fourth Horseman]

Is it an oiled filter? I like the size of it. Must breathe really well.

 

[Bradley G]

yes it has a slight oily treatment,

Get one ,you will like it!
Maybe some of the members that have no chaffing of the hoodliner can post a pic of thier setup .I have the intake spacer ,which raises the intake manifold 1/4 inch.I don't see how to correct this without changing the elbow,or as another member posted trim the elbow on the topedge that connects to the throttle body.
Bradley G

Is it an oiled filter? I like the size of it. Must breathe really well.

 

[Pat]

I noticed you didn't have the optional JLT heat shield installed. If you do purchase one maybe you could retest and see if there is any improvement in performance Vs the basic JLT kit. You mentioned a heat related impact.

Glad you did a comprehensive test, we've been waiting for one. Good show.

 

[QWK SVT]

Nice results. I too have the JLT, and IMO it is a noticeable improvement. What type of instrument are you using to measure times? G-tech? Stopwatch? Just wondering.

It's the original-style G-Tech. Stuck to the windshield, and never moved, until after the tests were complete. Sure, the numbers may not be 100% accurate, but they are deadly consistent. I make sure my methods are standardized, other wise they're useless in my own mind.

I've heard other complain about the G-Tech... So, when I first got it, my concern was consistency, which I find more useful than 100% accuracy. To take it to the extreme, even if I'm consistently off by 20-seconds, I'm still consistent, and can then make assumptions based on apples-to-apples comparisons.

So, to test the device, I did 10 0-60 runs, back-to-back. I filled up on gas and let the engine cool down, before doing 10 more. Filled up one more time, let the engine cool down, and did 10 more, for a total of 30 runs. My conclusion: The first run is almost always ther best - I assume do to additional engine temps afterwards. STDEV after that is less than 0.07 seconds, provided I don't try playing with the launch technique. To me, that is a good standard, to prove consistency.

 

[QWK SVT]

Is it tearing up the hood insulation?

The price is right for this kit, and it does appear that it offers a bit of performance. In other words it's tempting to break my self inflicted keep it stock rule. And then I learn they tear up the hood liner.
Yeah, yeah, I'm fussy.

No, there are no signs of damage to the hood liner, at all. Having said that, it's only been a few miles, but I've checked in the engine bay a couple of times, to make sure everything has seated itself nicely, and I'm pretty sure I'm fine...

 

[QWK SVT]

I'm not buying this crap for one second, the test is bogus because you forgot to top off the tank between the before and after testing, and gasoline weighs 8 pound a gallon!




Hehehe...Just kidding...Congrats, and a job well done. Very imformative, and a good example to all on how to do a field test.

Actually, I did, witht he same gas, from the same gas station... I neglected to add it, and probably didn't want to seem to anal I've been trained see the picture the data paints, and know all too well how easy it is for numbers lie, particularly when you're looking at data to support a belief (i.e my butt tells me I gained power).

I'm a big "questioner" - and I WILL question myself. If I can't pass my own validity tests, I will not make any inferences on the data, and certainly would post of gains.

Having said that, I'm anxious to shed some of the weight from the gas tank, and go all out to see how quickly I can get to 60, with a varying launch. I know it's not the be-all, end-all performance number, but it's the one most of the "uninitiated" talk about (particulary in my office, at work).

 

[QWK SVT]

So I went crazy answering, one question at a time... Guess I got a free bump in the post count, huh I'll start combining responses, now...

Would you happen to know how the JLT kit compares to the K&N. It sure is a sweet deal and looks great!

I can't give you a Marauder specific comparison... I have a K&N FIPK in the Lightning (which I got as a gift, so no $$$ paid). I really like it. I have a JLT in my Marauder. I (obviously) really like it, too. Jay is a supporting vendor here, that means something to me. Your decision, but I'm happy with mine.:2thumbs:

I noticed you didn't have the optional JLT heat shield installed. If you do purchase one maybe you could retest and see if there is any improvement in performance Vs the basic JLT kit. You mentioned a heat related impact.

Glad you did a comprehensive test, we've been waiting for one. Good show.

Actually, Jay sent me the full meal deal, supersized with the shield:

I do have the heat shield installed... You can kinda see it wrapping around the leftside of the filter, here: