1.6 & 1.9 Rear Beam Differences

[johno_78 2]

as the title says really as i have seen a 1.6 recon beam but wont bother if it aint as good as a 1.9 one.

[max0 5]

as the title says really as i have seen a 1.6 recon beam but wont bother if it aint as good as a 1.9 one.

 

you really want a 309 GTI beam as there wider (40mm) and have better torsion / anti roll bars to improve handling

 

if you have a 1.6 beam already you can use the anti roll bar / torsion bars to make up a base model beam if yours is dead.

 

base model beams dont have the bulge in the middle. Do a search as its been covered a lot but to answer your question i think they are the same but the trailing arms are slightly different to allow for the disk brakes

 

Andy

Edited July 18, 2006 by max0

[Jonmurgie 2]

But to answer your actual question, yes the 1.6 and 1.9 bams are the same except for the brakes

[johno_78 2]

excellent, thanks for that Jonmurgie

[max0 5]

excellent, thanks for that Jonmurgie

 

sorry for the long winded post

[inferno 1]

so just to throw a spanner in the works... my 1.6 abs beam is actually the same as the 1.9 beam also?

[Veero 1]

my 1.6 abs beam is actually the same as the 1.9 beam also?

 

Are you asking us or telling us?

 

Surely a 1.6 ABS beam will have all the motion sensing stuff on (as in the ABS gear) which most 1.9 beams don't so how can they be the same...

 

Veero

[inferno 1]

i was asking... hence the question mark

[Anthony 1,000]

1.6 and 1.9 beams are the same apart from the following:

• Brakes themselves
  
• Stub axles and hub nuts
  
• Wheel bearings
  
• Rear caliper mounting
  
• Standard ride height (1.6 are slightly higher)
  

The main parts - tube, torsion and anti-roll bars, trailing arms, shafts etc - are all the same (the exception being the very early 1.6's, but they're very rare now)

 

To the best of my knowledge, 1.6 ABS cars had a standard 1.9 beam fitted but used a different rear brake compensator to the 1.6/1.9 non-ABS

[Veero 1]

i was asking... hence the question mark

 

Well it wasn't totally clear since the sentence was a statement with a '?' tacked on the end

 

So 1.6 ABS cars didn't have the motion sensor or toothed parts (like on the ABS front driveshafts)? So did they just work on if the front wheels were locked up or not?

 

Veero

[Anthony 1,000]

So 1.6 ABS cars didn't have the motion sensor or toothed parts (like on the ABS front driveshafts)? So did they just work on if the front wheels were locked up or not?

Correct - 205/309 ABS was just a two wheel system that worked on the front wheels, and has a load-based compensator for the rear wheels. No speed sensing on the rear hubs at all. So rather primative compared to modern ABS...

[Emmy Seize 8]

Correct - 205/309 ABS was just a two wheel system that worked on the front wheels, and has a load-based compensator for the rear wheels. No speed sensing on the rear hubs at all. So rather primative compared to modern ABS...

 

Not exactly.

 

The system has only two wheel sensors at the front but this doesn´t mean it only affects the front wheels.

The rear pressure is controlled via magnetic valves which are operated by the ABS ECU.

Rear brake pressure is calculated in relation to the "behaviour" of the pressure in the front lines.