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 Red Springs vs Blue Springs in SU

 Created by: 66Cooper'S
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 Posted: Feb 22, 2019 12:04PM
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The Haynes SU Automotive Repair Manual shows the blue spring when loaded at 2.5 oz. is 2.625" long. Red when loaded at 4.5 oz. is 2.635". I use a digital postal scale and a small steel rule to measure them.

Kelley

"If you can afford the car, you can afford the manual..."

 Posted: Feb 22, 2019 09:40AM
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Quote:
Originally Posted by CooperTune
I have a cardboard box full of SU springs. I tend to measure the wire dia and count the number of coils. Steve (CTR)
and once you have done this Steve what does it tell you? if it is say:
0.040" with 30 coils does that make it blue? 
0.030" with 38 coils does that make it red?

 Posted: Feb 22, 2019 07:02AM
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I have a cardboard box full of SU springs. I tend to measure the wire dia and count the number of coils. Steve (CTR)

 Posted: Feb 22, 2019 05:04AM
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CA
From new, apparently the colours are not easy to distinguish. I bought a new HIF44 from Burlen, which I had difficulty tuning. After sending it to a Mini mechanic, I still had problems. When I too the dashpot apart, I found both springs inside. I can't imagine the mechanic putting both in (he has/had a very high reputation). I can only assume it was shipped with both springs inside. As you can see they are physically quite different, except for colour.

.

"Hang on a minute lads....I've got a great idea."

 Posted: Feb 21, 2019 02:18PM
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How do you tell the difference between the red vs the blue ones.  If they are new there's a touch of red or blue paint on them, but after working in a carb for several weeks/months/years/decades ...