What does a NORMAL 914, engine sound like? |
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What does a NORMAL 914, engine sound like? |
Ctrout |
Jul 25 2004, 11:39 PM
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#1
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
The engine mechanical sound while it's running, not the exhaust. My stock 1974 1.8 L-jet makes a kind of soft klacklacklacklack sound when it runs. Is this normal?
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Trekkor |
Jul 25 2004, 11:43 PM
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#2
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
Mine goes...Vroom vroom..ahhh...Vroom vroom..ahhh (IMG:style_emoticons/default/lol2.gif)
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sj914 |
Jul 25 2004, 11:45 PM
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#3
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Senior Member Group: Members Posts: 805 Joined: 20-August 03 From: San Jose, CA Member No.: 1,053 |
I think thats normal. It's just the sound of the valves, since it doesn't have hydraulic lifters.
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ArtechnikA |
Jul 26 2004, 04:58 AM
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#4
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
if you are SURE your valves are adjusted to spec for your engine, it's probably normal. you may be ablt to hear the injectors click too.
clack/tick noises are often your engine telling you it wants its valves checked. if they ARE adjusted to spec and that noise goes away (hard to tell, 'cause it's usually gradual...) you probably have a valve tightening up (bad) and you should check into it soon. |
seanery |
Jul 26 2004, 07:06 AM
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#5
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
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moneysmarts |
Jul 26 2004, 08:57 AM
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#6
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None |
Very nice, Sean!
What muffler were you running? Steve |
smg914 |
Jul 26 2004, 09:07 AM
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#7
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Sahara Beige Steve Group: Members Posts: 1,962 Joined: 22-February 04 From: Tampa, FL Member No.: 1,695 Region Association: None |
If I was to describe the sound of a stock, fuel injected 914 engine........If everything is working correctly and everything is adjusted perfectly, it sounds like a well oiled machine. It has a mechanical sound with a slight sing/ring to it.
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seanery |
Jul 26 2004, 09:08 AM
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#8
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
Steve,
that is a Triad muffler. Do a search here and you'll find lots of pictures and testimonials from guys using them. |
Bleyseng |
Jul 26 2004, 09:22 AM
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#9
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
They are loud with lots of mechanical sounds when cold. When they are at operating temp the engines are fairly quiet especially with the stock muffler.
Geoff |
moneysmarts |
Jul 26 2004, 09:32 AM
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#10
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None |
Sean:
Thanks. I just linked to the Triad site. The dual pipes are very nice, indeed. At about $325, though, that's almost 75% more than a Bursch. Are they that much better? Steve |
sgomes |
Jul 26 2004, 09:39 AM
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#11
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Electric Member Group: Members Posts: 815 Joined: 6-May 04 From: Campbell, CA Member No.: 2,029 |
Just had to add...
I drove my electric 914 to a local mechanic who knows 914s. I silently cruised up to him. He says, "Man I've never heard valves on type 4 dialed in like that!!!" (IMG:style_emoticons/default/laugh.gif) |
Ctrout |
Jul 26 2004, 10:20 AM
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#12
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
Thanks for the sound bite seanery. That is almost exactly what mine sounds like. Except when I rev mine, it pops from the exhaust a bit 'cause I got's a couple holes in mine.
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nebreitling |
Jul 26 2004, 11:04 AM
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#13
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
QUOTE(ArtechnikA @ Jul 26 2004, 02:58 AM) if they ARE adjusted to spec and that noise goes away (hard to tell, 'cause it's usually gradual...) you probably have a valve tightening up (bad) and you should check into it soon. What would a valve which is tightening indicate? |
lapuwali |
Jul 26 2004, 11:08 AM
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#14
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
A tightening valve usually means the seat is receding into the head.
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ArtechnikA |
Jul 26 2004, 11:16 AM
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#15
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(nebreitling @ Jul 26 2004, 09:04 AM) What would a valve which is tightening indicate? it -can- mean the valve is receding, possibly due to erosion, or it can mean the valve is stretching (somewhat more likely, i think...) due to having been overheated or just fatigued from long life. but tight valves are on their seats less time than loose valves, meaning they cool less well, and at some point, they just don't close, and they can burn easily. however, very small clearances also act like more cam (increased duration) which is yet another reason aircooled engines tend to run best right before they explode... producing more power == more heat but less time on seat means less cooling, which means more heat, which means the valve is more likely to stretch, which further tightens the clearances... that path can lead to destruction pretty quickly... loose alves are kind of self-limiting. the engine makes noise and runs bad, and eventually almost anyone will notice and do something about it. when valves tighen up the engine runs better and quieter - right up until the time a valve breaks or the increased heat loosens a seat ... |
Mark Henry |
Jul 26 2004, 03:52 PM
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#16
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Chitty-chitty bang-bang (IMG:style_emoticons/default/biggrin.gif)
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pbanders |
Jul 26 2004, 05:16 PM
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#17
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Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Get an empty coffee can, and put about a dozen ball bearings in it. Shake vigorously.
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