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> What's the difference between..., the 1.7 and 2.0 exhaust?
BMXerror
post Mar 12 2008, 06:29 PM
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Well, you read the title. I noticed that the gaskets are different for the two, but I thought they were interchangeable. What am I missing? Thanks.... Oh, yes... I had another similar question. Is the case bore for the cylinders bigger on the 2.0 than the 1.7? I know the heads are different, but I'm not sure about the case. Thanks again.
Mark D.
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SLITS
post Mar 12 2008, 06:33 PM
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Yes No, the case does not have to be bored for 2.0 cylinders

Difference ....night and day ... 2.0 larger diameter pipe, no up sweep at the muffler end, different support on the tranny, different muffler.
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BMXerror
post Mar 12 2008, 07:11 PM
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Okay, so why do sellers of aftermarket headers never specify 1.7 or 2.0? If the gaskets are different I would think the headers would need to be different.
Mark D.
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Bleyseng
post Mar 12 2008, 07:13 PM
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QUOTE(SLITS @ Mar 12 2008, 05:33 PM) *

Yes, the case has to be bored for 2.0 cylinders

Difference ....night and day ... 2.0 larger diameter pipe, no up sweep at the muffler end, different support on the tranny, different muffler.


What? (IMG:style_emoticons/default/confused24.gif) the case bore is the same for a 1.7 or a 2.0L its the head register that needs to be enlarged to fit the 94mm cylinders. (IMG:style_emoticons/default/chair.gif)
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BMXerror
post Mar 12 2008, 07:27 PM
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QUOTE(Bleyseng @ Mar 12 2008, 06:13 PM) *

QUOTE(SLITS @ Mar 12 2008, 05:33 PM) *

Yes, the case has to be bored for 2.0 cylinders

Difference ....night and day ... 2.0 larger diameter pipe, no up sweep at the muffler end, different support on the tranny, different muffler.


What? (IMG:style_emoticons/default/confused24.gif) the case bore is the same for a 1.7 or a 2.0L its the head register that needs to be enlarged to fit the 94mm cylinders. (IMG:style_emoticons/default/chair.gif)

Both the case and heads are different bore, I guess.
Mark D.
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Dave_Darling
post Mar 12 2008, 08:11 PM
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All stock Type IV cases have the same spigots for the cylinders. The registers in the heads are smaller on the 1.7s, but that's it.

The 1.7 exhaust (also the 1974-only 1.8) is smaller diameter than the 73-74 2.0 exhaust. The muffler ends of the pipes are also a different distance apart.

That said, any of the 914-4 exhausts will fit any of the 914-4 motors.

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jimkelly
post Mar 12 2008, 08:16 PM
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2.0 and 1.7/1.8 style heat exchangers will fit on any engine but you will need a 2.0 muffler and 2.0 muffler hanger to use 2.0 he's - and a 1.7/1.8 muffler and a 1.7/1.8 muffler hanger to use 1.7/1.8 he's.

there are several dimensions of difference between the two styles at the muffler end - at the heads end they are the same.

http://www.914world.com/bbs2/index.php?aut...blogid=312&

as for headers - because they don't use a 2.0 or 1.7/1.8 muffler or associated muffler hanger - headers can be used on all engines.

as for cylinder head exhaust gaskets - pelican does sell two styles - the difference must be extremely minimal ??
http://www.pelicanparts.com/catalog/shopca...p_pg1.htm#item3
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rhodyguy
post Mar 13 2008, 08:01 AM
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the flange bolt pattern is slightly dif on the 1.7/1.8 vs the 2.0. that's why the gaskets won't interchange.
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race914
post Mar 13 2008, 09:31 AM
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Here's a great diagram. Not mine but someone posted it here previously. If my memory worked... I'd remember who!

Attached Image
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Cap'n Krusty
post Mar 13 2008, 09:41 AM
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QUOTE(SLITS @ Mar 12 2008, 05:33 PM) *

Yes, the case has to be bored for 2.0 cylinders

Difference ....night and day ... 2.0 larger diameter pipe, no up sweep at the muffler end, different support on the tranny, different muffler.


Uhhhhhhh, Slits? NO, THE CASE DOESN'T HAVE TO BE BORED FOR 2.) CYLINDERS.

We now return to our regularly scheduled programming. Can't we put answers to questions like these in some sort of FAQs? The Cap'n
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SLITS
post Mar 13 2008, 06:54 PM
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So I fuched up ... you obviously mistook this face for someone who gives a shit.

I do have an eraser on my pencil.

Next!
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BMXerror
post Mar 13 2008, 09:30 PM
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QUOTE(SLITS @ Mar 13 2008, 05:54 PM) *

So I fuched up ... you obviously mistook this face for someone who gives a shit.

I do have an eraser on my pencil.

Next!

(IMG:style_emoticons/default/av-943.gif) Thanks guys! Yes, Cap'n. An FAQ section would be great.
Mark D.
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orange914
post Mar 13 2008, 10:59 PM
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QUOTE(SLITS @ Mar 13 2008, 05:54 PM) *

So I fuched up ... you obviously mistook this face for someone who gives a shit.

I do have an eraser on my pencil.

Next!


thats not an eraser in gumbys mouth (IMG:style_emoticons/default/smoke.gif) (IMG:style_emoticons/default/happy11.gif)

ALSO the stainless steel 1.7/1.8 and the 2.0 I.D. is the same, never confirmed that though

mike
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