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Old 13th November 2012, 09:10   #106
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Quote:
Originally Posted by GTO

A windshield can be replaced. I'm worried about your ear drums

Do you wear ear plugs at demos & auditions? Please take care, man!
Most ear plugs will reduce SPL by about 30db at best. With the low frequency rumbles that LBM generates with his Ground Pounders I worry not so much about his ears but sometimes also what's between them.

Seriously, I believe Ragu is usually not in the car when he turns it on.

LBM have all these high output low frequency sound waves done any other damage? Engine moorings perhaps?
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Old 13th November 2012, 09:30   #107
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Insane! I still recall the first time I saw the V1.0 video. Never knew rumble from a sound system could distort a car quite like that.

LBM, I sincerely hope you wouldn't trade your Swift for a bus.

Take care man.
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Old 13th November 2012, 14:23   #108
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Quote:
Originally Posted by kpzen View Post
Suicidal, if you ask me !!
good luck.
Well dosen't matters even i use a Suicidal setup like this in my car but with 2 x 15s DC Audio doing about 32hz

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Ramie

Last edited by ramie2400 : 13th November 2012 at 14:26.
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Old 13th November 2012, 22:21   #109
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

The flex is unlike I've ever seen!!!

Truly an amazing feat, this!

But you should check this out - http://thorax.bmj.com/content/59/8/722.abstract
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Old 13th November 2012, 22:53   #110
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Sohail now what will happens to this person in the video sitting between the woofers . There are many people in US which have bigger setup and they havent got any problem related to hearing .



Quote:
Originally Posted by sohail99 View Post
The flex is unlike I've ever seen!!!

Truly an amazing feat, this!

But you should check this out - http://thorax.bmj.com/content/59/8/722.abstract

Last edited by bblost : 13th November 2012 at 22:56. Reason: Fixed youtube embedding. Please use http instead of https for youtube urls.
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Old 5th December 2012, 16:59   #111
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

I have finally installed the second alternator in my ride. The voltage now is very much stable. So stable that it does not goes below 13 volts at full tilt. And returns to 14.0-14.2 as soon I reduce the sub !!! The RF 2500.1 are very efficient amps !!! Very happy with the result.

The alt used here is Bosch 150 Amps Alternator doing approx 160 amps got it for approx Rs 6000 = $110. So the final combined current both alt give is 220 amps (Mechman) + 160 amps = 380 amps !!! More than what I need at the movement. I have installed switches to manual switch off the alternator if required . Like when the setup is not running and further reducing load on the engine !!!

The bracket of the alternator. I made it myself.
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_154502.jpg

With the alt mounted
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_155624.jpg

another view
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_155635.jpg

mounted on the engine.
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_161400.jpg

both the alts
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_161501.jpg

current measured
LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121204_163601.jpg
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Old 6th December 2012, 11:36   #112
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

One more thing, the a/c compressor is still there. It was not removed for the alternator install.
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Old 6th December 2012, 12:49   #113
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Could you share more information on the second alternator? Basically, I would like to know
1. How it is driven.
2. Was there space to accomodate the alternator?

Designing mounting for the alternator is definitely a PRO job! Congrats.
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Old 6th December 2012, 13:22   #114
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Quote:
Originally Posted by audioholic View Post
1. How it is driven.
2. Was there space to accomodate the alternator?
Via a belt. Clearly shown in the pics along the space where it is installed !!!

If you need more info do let me know !!!
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Old 6th December 2012, 16:14   #115
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

I got that it was belt driven. But did you use existing belts or did you add a pulley + belt to the existing pulley setup?
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Old 7th December 2012, 13:48   #116
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Quote:
Originally Posted by audioholic View Post
I got that it was belt driven. But did you use existing belts or did you add a pulley + belt to the existing pulley setup?
I think this pic will clear all your doubts !!!

LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-20121206_131949-large.jpg
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Old 14th December 2012, 17:46   #117
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

In the picture above, I can see bearings between the AC Compressor and the Second Alternator.
The bearings are uncovered and probably not crowned.

1. Don't you think you risk the bearings going bad if water splashes on them while driving.

2. And also, because there is no crowning over the bearings, don't you risk unnecessary vibration and slipping of the belt that might lead to premature failure?

Just some observations.
But yes, you deserve a lot of respect for this build.
Cheers!!
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Old 15th December 2012, 12:14   #118
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Quote:
Originally Posted by abhipuru16 View Post
In the picture above, I can see bearings between the AC Compressor and the Second Alternator.
The bearings are uncovered and probably not crowned.

1. Don't you think you risk the bearings going bad if water splashes on them while driving.

2. And also, because there is no crowning over the bearings, don't you risk unnecessary vibration and slipping of the belt that might lead to premature failure?

Just some observations.
But yes, you deserve a lot of respect for this build.
Cheers!!
Thanks !!!

The bearing used are sealed one and are resistant to fail in these type of situations. Also I would not be using this ride as a daily drive so the usage is very low.

Crowning is not required here as the belt is guided at two points that is the alternator and the compressor. The purpose of the bearing is to increase the belt wrap at both the alternator and the compressor. The belt stay at the same position and does not moves or gets slips even under load !!!
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Old 16th December 2012, 01:04   #119
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

Few pics !!!!

LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-dsc_0865-large.jpg

LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)-dsc_0914-large.jpg
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Old 16th December 2012, 09:53   #120
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Default Re: LBM's Ground Pounder V2.0! EDIT : Windshield cracked (Page 7)

LBM bhai, could you show us a close up of the 'Warning' sticker on the rear windshield?
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