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> The difference between Early and Late Exhaust Systems, a Visual Guide, Or, what kind of Exhaust do I have
newto914s
post Jul 1 2007, 09:48 PM
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This is my first attempt at actually contributing to this site (IMG:style_emoticons/default/smile.gif)
A brief write up on the difference between early(70-74) and late(75-76) style exhaust systems, with many pictures for you visual learners.
We'll start the Heater Box
Arranged top to bottom.
e1.7
e2.0
L2.0 all passenger sides
Attached Image
Note the separate collector for the later style.
Also note the bend in the 1.7 differentiating it from the e2.0
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newto914s
post Jul 1 2007, 09:56 PM
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Now to show the ID of the tubing, Keep in mind these are all used and are not perfectly true(margin of error), but you can still see a notable difference between the Stainless steel early style and the later ID
e1.7
Attached Image
e2.0
Attached Image
L2.0
Attached Image
Muffler mount flanges.
e1.7
Attached Image
e2.0
Attached Image
L2.0
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newto914s
post Jul 1 2007, 09:59 PM
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Air guide hardware, S and J-tubes on the left for Early style and the one Piece for the Later styleAttached Image
As mounted with Flapper boxes in place.
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newto914s
post Jul 1 2007, 10:03 PM
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Muffler hangers, picture courtesy of Rhodyguy
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And the Thread it came from.
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newto914s
post Jul 1 2007, 10:08 PM
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Various pictures of the Bursch Mufflers for the L2.0 and e1.7 on bottom.
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newto914s
post Jul 1 2007, 10:15 PM
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Mufflers are near identical differing only by the collector arrangement for obvious reasons, one a 2-1 and the other a 4-2-1. Also note the jumper pipe in the L2.0 for deleting the Cat.
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newto914s
post Jul 1 2007, 10:16 PM
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And lastly the late Stock muffler with Cat in place and O2 sensor of some kind.


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newto914s
post Jul 1 2007, 10:22 PM
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Well, that's all I've got. I hope that will help someone someday. If you've got a picture of the OME e1.7 and/or e2.0 Banana muffler post it.
Thanks
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McMark
post Jul 1 2007, 11:16 PM
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Very cool! Thanks for taking the time! (IMG:style_emoticons/default/smiley_notworthy.gif)

I think the 'O2 sensor' is the EGR bung. (IMG:style_emoticons/default/wink.gif)
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ConeDodger
post Jul 1 2007, 11:18 PM
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QUOTE(McMark @ Jul 1 2007, 10:16 PM) *

Very cool! Thanks for taking the time! (IMG:style_emoticons/default/smiley_notworthy.gif)

I think the 'O2 sensor' is the EGR bung. (IMG:style_emoticons/default/wink.gif)


Yup... Gotta be. No O2 sensor on a 914 from factory.
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newto914s
post Jul 2 2007, 12:28 AM
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QUOTE(ConeDodger @ Jul 1 2007, 09:18 PM) *

QUOTE(McMark @ Jul 1 2007, 10:16 PM) *

Very cool! Thanks for taking the time! (IMG:style_emoticons/default/smiley_notworthy.gif)

I think the 'O2 sensor' is the EGR bung. (IMG:style_emoticons/default/wink.gif)


Yup... Gotta be. No O2 sensor on a 914 from factory.

I knew it wasn't an O2 sensor but I couldn't think what else it would be, thus the "of some kind" (IMG:style_emoticons/default/biggrin.gif)
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PeeGreen 914
post Jul 2 2007, 12:42 AM
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Just when you think you're done...wait, there is more..lol
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Wow, thanks for show us that. I would have never learned that else where. I have read a few books on 914s, and not one of them mentioned any of that.
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RohJay
post Jul 2 2007, 01:20 AM
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This is very helpful. Thanks for your effort.

re. Bursch, are there diiferent versions to suit the various early engine sizes. ie. 1.7, 1.8 and 2.0?
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SirAndy
post Jul 2 2007, 01:53 AM
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QUOTE(RohJay @ Jul 1 2007, 11:20 PM) *

re. Bursch, are there diiferent versions to suit the various early engine sizes. ie. 1.7, 1.8 and 2.0?


yes.

one for 1.7L/1.8L motors and one for the 2.0L motors ...
(IMG:style_emoticons/default/cool_shades.gif) Andy
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sean_v8_914
post Jul 2 2007, 02:02 AM
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instant classic thread!!!
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rhodyguy
post Jul 2 2007, 09:09 AM
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the top hanger in post #14 is for the late (75-76) hes. the one for earlier version 2.0 hes are narrower (distance from bolt hole to bolt hole). i posted a picture of all 3 versions and the repsective b.h. measurements about 2 years ago.

k
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Cap'n Krusty
post Jul 2 2007, 09:45 AM
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QUOTE(McMark @ Jul 1 2007, 10:16 PM) *

Very cool! Thanks for taking the time! (IMG:style_emoticons/default/smiley_notworthy.gif)

I think the 'O2 sensor' is the EGR bung. (IMG:style_emoticons/default/wink.gif)


Nice guess, but wrong. The EGR line bolts to the rectangular plate just to the right of the bung in question. That bung (with the device screwed into it) is an exhaust temp warning unit. There's a light on the dash, IIRC, that illuminates when the cat gets too hot. The Cap'n
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newto914s
post Jul 2 2007, 09:45 AM
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Thanks Rhodyguy, I just edited #14 to include your picture.
Samson
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johannes
post Sep 24 2007, 02:13 PM
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I say "I vote: CLASSIC" !!!!
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rhodyguy
post Sep 24 2007, 02:34 PM
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Chimp Sanctuary NW. Check it out.
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to add to this. after communicating barber dave, there seems to be a varience concerning the 1.7/1.8 mufflers. as dave relayed to me, the early, early 1.7 bursch mufflers are configured for the rear valance with the hole as opposed to the valances with the notch.

k
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