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Author Topic: Crossbar engine Fiat 131  (Read 12609 times)
sentrentu
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« on: January 03, 2013, 07:19:28 PM »
Who knows me to say exactly what is the weight applied to the inside of the transom motor having all the Fiat 131 (Abarth included) supported by two screws?

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Fiat 131 Abarth Rally 77
Fiat 131 Rally gr.4 77
Fiat 131 Racing Replica Abarth 80
Fiat 131s 1.6 77
Fiat 131 1.3 mirafiori 79
Fiat 131 1.3tc Supermirafiori 82
Fiat 131 2.0vx Supermirafiori 82
..
Fiat 131 Abarth#2
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Fiat 131 Abarth Gr.4
« Reply #1 on: January 07, 2013, 04:07:54 PM »
this weight is mounted to reduce secondary harmonics so can be balanced the engine harmonics to the frame or chassis!
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Enzo from Germany!
sentrentu
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« Reply #2 on: January 07, 2013, 04:29:58 PM »
The racing versions and is not put it off the road version will not feel the difference Huh
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Fiat 131 Abarth Rally 77
Fiat 131 Rally gr.4 77
Fiat 131 Racing Replica Abarth 80
Fiat 131s 1.6 77
Fiat 131 1.3 mirafiori 79
Fiat 131 1.3tc Supermirafiori 82
Fiat 131 2.0vx Supermirafiori 82
..
Fiat 131 Abarth#2
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Fiat 131 Abarth Gr.4
« Reply #3 on: January 07, 2013, 05:22:47 PM »
engineer have invented this but why nobody knows!  Grin
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Enzo from Germany!
Henk
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« Reply #4 on: January 07, 2013, 07:43:16 PM »
I always thought it is to avoid resonance frequenties off certain masses....
this could be triggered by certain engine noises etc resulting in strong vibrations of parts with the same (resonance) frequency
modern cars often have these added blocks to change te frequency
(correct me if I am wrong)
I think Enzo is right, it is more theory then practice... Grin
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Henk
Fiat Mirafiori 1.6 A1.00
MB W114 280 C
Honda CB750 1972
BMW E30 318 Touring
mirafiori76
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« Reply #5 on: January 07, 2013, 07:45:45 PM »
I never understood why they put this piece of lead into the cross member. Anyway, i always took it out. It reduces over 3 kilo's of weight and it does nothing off to the balance, handling or performances.
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Mike.131 Abarth group 4, 131 Racing Walter Rohrl, 131 1600 CL
Henk
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« Reply #6 on: January 07, 2013, 07:59:03 PM »
on the other hand, these resonances can be very harmfull....
rememeber the opera singer breaking a wineglass with the right frequecy Cry
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Henk
Fiat Mirafiori 1.6 A1.00
MB W114 280 C
Honda CB750 1972
BMW E30 318 Touring
sentrentu
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« Reply #7 on: January 07, 2013, 08:17:04 PM »
Check the manual in parts, I do not find this particular as a spare, yet it is only common on all 131 series Huh
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Fiat 131 Abarth Rally 77
Fiat 131 Rally gr.4 77
Fiat 131 Racing Replica Abarth 80
Fiat 131s 1.6 77
Fiat 131 1.3 mirafiori 79
Fiat 131 1.3tc Supermirafiori 82
Fiat 131 2.0vx Supermirafiori 82
..
mirafiori76
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« Reply #8 on: January 07, 2013, 08:17:15 PM »
I like to drive my "Spartan" 131  Wink Cheesy Cheesy A little resonance gives the car this feeling that it's alive  Grin
When the sesonance stops then i start worrying  Cheesy Cheesy Cheesy Cheesy Cheesy
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Mike.131 Abarth group 4, 131 Racing Walter Rohrl, 131 1600 CL
Fiat 131 Abarth#2
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Fiat 131 Abarth Gr.4
« Reply #9 on: January 07, 2013, 08:31:18 PM »
Quote from: mirafiori76 on January 07, 2013, 08:17:15 PM
I like to drive my "Spartan" 131  Wink Cheesy Cheesy A little resonance gives the car this feeling that it's alive  Grin
When the sesonance stops then i start worrying  Cheesy Cheesy Cheesy Cheesy Cheesy

Mike,
for me gives this more vibration resonance and feeling!  Cheesy Grin Wink

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Enzo from Germany!
mirafiori76
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« Reply #10 on: January 07, 2013, 08:45:38 PM »
Eeeh... Enzo? Where is the piece of lead hidden in her?  Cheesy Cheesy Cheesy Cheesy

Anyway, when my group 4 is finished it will vibrate, squeek, rattle, hum, resonate and whatever more... I CAN'T WAIT... Wink Cheesy Cheesy Cheesy
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Mike.131 Abarth group 4, 131 Racing Walter Rohrl, 131 1600 CL
Tas131
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« Reply #11 on: January 08, 2013, 12:45:04 AM »
Quote from: mirafiori76 on January 07, 2013, 08:45:38 PM
Enzo? Where is the piece of lead hidden in her?

The lead is the weight in your pockets trying to pay for the maintenance on that model, but the curves look like it would handle, so could be worth it for a few years until the rot sets in.
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Mick.
Tasmania. Australia.
Red/grey series 2 (Daily driver)
Dark blue series 1 (Dismantled)
Light blue series 2 (Crashed then dismantled)
Metallic blue series 2 (Dismantled)
sentrentu
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« Reply #12 on: January 08, 2013, 07:57:18 AM »
Be good .............. Kiss
Here more pictures of this cross, it would be nice to understand the motivation of this weight Smiley

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* 02012013(008).jpg (64.21 KB, 1152x864 - viewed 685 times.)
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Fiat 131 Abarth Rally 77
Fiat 131 Rally gr.4 77
Fiat 131 Racing Replica Abarth 80
Fiat 131s 1.6 77
Fiat 131 1.3 mirafiori 79
Fiat 131 1.3tc Supermirafiori 82
Fiat 131 2.0vx Supermirafiori 82
..
sentrentu
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« Reply #13 on: January 08, 2013, 07:58:22 AM »
And............

* 02012013(006).jpg (60.78 KB, 1152x864 - viewed 698 times.)

* 02012013(007).jpg (62.13 KB, 1152x864 - viewed 644 times.)
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Fiat 131 Abarth Rally 77
Fiat 131 Rally gr.4 77
Fiat 131 Racing Replica Abarth 80
Fiat 131s 1.6 77
Fiat 131 1.3 mirafiori 79
Fiat 131 1.3tc Supermirafiori 82
Fiat 131 2.0vx Supermirafiori 82
..
N. Dinis
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« Reply #14 on: January 08, 2013, 11:20:51 AM »
sorry,I'm still trying to find that part on that 131 special that Enzo posted a few posts before hehehe
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