Sound Absorber / Heater Tube removal

[advtracing]

As in previous threads in the general info area i am currently doing a Kremer ST build . I'm in the middle of doing the chassis work and have removed the sound absorbers from both side inner sill's.
I am planning not to reinstall these as there will be no heater setup and the ends will be caped .
The question is has anyone removed these and NOT reinstalled them ? is there any side effect from not having them ? look forward to your thoughts.

[W6CZ]

I believe Emory Motors removed them on John Thornton's 912 race car. No ill effects that I know of. How much did they weigh?


FYI - (I think it was 1 1/2") PVC pipe caps with one or two wraps of electric tape plugged the inlets where the butterfly valves were on my 912"R" just fine.

[jhora]

John...
I have removed them from 914 race cars and no problems at all....it was for weight savings....and did not need any heat...the 914 part is similar to the 911 part and are rather heavy...sorry can't find my notes on the weight..
Good luck with the project!

John

[super9064]

I'm at this stage in my build, It will be mostly a street car. Does the heater tube provide any side impact protection?

[jhora]

Rob....I would say it would be very very marginal as an impact barrier...it is made out of a cardboard like material on the out side and looks somewhat like the the other interior heater hoses just a lot bigger...inside of it is a fiberglass batting surrounding an aluminum foil covered smaller cardboard tube that is perforated....really like a big silencer and I think somewhere in old documents I have seen it called that...

[robmog]

i can't imagine they weigh more than a pound each.
i know racers will do anything to drop pounds.
that being said, you can't put them back in later.

[jhora]

Actually they are kind of heavy....seems like they were more like 6 or 7lbs each..
I can't find my darn notes....I even had the weights for the floor tar insulation I removed....
And yes every ounch makes a difference....so was the goal of the 911R
so total of 14lbs...equals 2HP...that is a lot...nothing like free HP

[advtracing]

Thanks guys , thats just what i needed to know.

[robmog]

now i gotta know for sure!
when mine were out for the sill repair they seemed pretty light.
maybe i just ate my wheaties that day.
i didn't weigh them, i did weigh the tar paper sound proofing: 14#.
and the impact bar in my replacement door adds 5#.
john, since yours are out, how about a weight?

[advtracing]

now i gotta know for sure!
when mine were out for the sill repair they seemed pretty light.
maybe i just ate my wheaties that day.
i didn't weigh them, i did weigh the tar paper sound proofing: 14#.
and the impact bar in my replacement door adds 5#.
john, since yours are out, how about a weight?

As my lock up is a way away from home i won't be able to check until this weekend , so hold fire and i'll report back monday