Review: PC 7424 vs. PC 7424XP

**imported_Luster** · 06-24-2009, 11:02 AM

Originally Posted by sydster

Hi Luster, Great review and comparison on the PC! Just wanted to know where the new PC 7424XP is made, is it made in China or Mexico?

Thanks,

Syd

Hey Syd..... Welcome to TID!!!

Made in Mexico

**imported_sydster** · 06-24-2009, 05:22 PM

Thanks for the info Luster!

**gmblack3** · 06-24-2009, 10:35 PM

Originally Posted by Luster

Bryan... be sure to post a review of your thoughts about the new machine, in this thread. We`ll see if we are in agreement.

Bill, I agree that its easier to hold the new XP when polishing, but IMO the new machine has more vibes at speed 6. That is the only speed I use.

I ended up using M86 for the first time as the one step polish and did not have time to do a a/b comparo between the two as far as corrections go.

BTW thanks to Todd for suggesting the M86, its a very nice polish that fills the gap between M105 and M205.

**imported_Luster** · 06-24-2009, 10:39 PM

Originally Posted by gmblack3

Bill, I agree that its easier to hold the new XP when polishing, but IMO the new machine has more vibes at speed 6. That is the only speed I use.

.

I didn`t really notice a difference in the vibration.

What I really need to do is this... (on my "practice fender" in the garage)... Fire up both PC`s at the same time and compare the vibration at speed 6.

I`ll give that a try some time and post my findings.:wink:

**imported_Goose** · 06-25-2009, 02:26 AM

Originally Posted by Luster

I just got my PC 7424XP and I wanted to do a comparison test for all who might be interested.

Size:

The XP is slightly larger, maybe 3/4" longer. Shaped a little different, more comfortable to hold.

Weight:

XP is probably 1/2 pound heavier, but not noticible when polishing.

Improvements:

The XP has an improved on/off switch. It is larger, red in color, has a more firm feel and is easy to locate.

The overall shape and ergonomics of the new machine are much better than the old one. Even though the XP is 1/2 pound heavier, it is more comfortable to use, just by the change in the shape... more "curvy". Fits in your hands better.

Thanks for taking the time to do this review.
Well done! :notworthy:

**imported_Luster** · 06-25-2009, 08:15 AM

Originally Posted by gmblack3

Bill, I agree that its easier to hold the new XP when polishing, but IMO the new machine has more vibes at speed 6. That is the only speed I use.

.

After I read your post last night, I decided to do one more side-by-side comparison for vibration. I just finished the test and here are my findings:

Test Conditions:

I placed both polishers on my "test" fender for the comparison. I tested both machines holding the main body of the machine in my hand, with my thumb on the on/off switch. That way I could switch them on at the same time. There was no handle attached to either machine. Each machine had a 5.5" orange pad, with 3M Rubbing Compound.

Sorry no pictures... I didn`t have a third hand.

Vibration Under No Load - Speed 6:

The 7424 and the XP model were pretty close. I would say the vibration was negligible.

Vibration Under 15 lb. of Pressure - Speed 6:

Upon further review, the XP does have a little more vibration than the original 7424. I would say 5% more at the most. Barely noticible.

Conclusion:

Does the additional vibration outweigh the additional power? In my opinion, no. In my initial review, I didn`t even notice the extra vibration, but I did notice the extra power. When I actually compared the machines side by side, at the same time, actually looking for vibration issues, there is a slight difference, but not enough to keep me from purchasing the XP.

Even if I was using the 7424XP all day, every day, I really don`t think the vibration issue would be enough to stop using it.

(When I was a teenager, I ran a jack-hammer on a concrete demolition crew for 8 hours a day. So I guess a little vibration wouldn`t bother me much.:wink