You would think that. By retarding the timing 2-3 degrees an exhaust leak would sound different. Weak springs on the centrifical advance in the distributor causing the timing to move at "certain" rpms??? Seen alot in my 25+ years of tinkering with over 350 cars bought and sold...
----- Original Message ----
From: J. Brady <[EMAIL PROTECTED]>
To: The Chevelle Mailing List <chevelle-list@chevelles.net>
Sent: Friday, November 10, 2006 6:10:44 PM
Subject: Re: [Chevelle-list] 327 question
From: J. Brady <[EMAIL PROTECTED]>
To: The Chevelle Mailing List <chevelle-list@chevelles.net>
Sent: Friday, November 10, 2006 6:10:44 PM
Subject: Re: [Chevelle-list] 327 question
Only thing is, if it were lower end, wouldn't you hear
it continue at higher RPMs? That the part that's
eatin me.
Jim
--- Carl Ziegler <[EMAIL PROTECTED]> wrote:
> It could be an exhaust leak as well. Been there....
> Try adjusting the timing a few degrees. If nothing
> changes it might be in the lower end
> unfortunately...
>
> ----- Original Message ----
> From: J. Brady <[EMAIL PROTECTED]>
> To: The Chevelle Mailing List
> <chevelle-list@chevelles.net>
> Sent: Friday, November 10, 2006 5:58:12 PM
> Subject: Re: [Chevelle-list] 327 question
>
> That's exactly what I think it is Carl, sounds like
> a
> wrist pin or piston slap to me.
>
> I don't recall hearing it when in the driveway, only
> when out on the road.
>
> Jim
>
>
> --- Carl Ziegler <[EMAIL PROTECTED]> wrote:
>
> > Does it only happen when under a load or can you
> sit
> > there and rev it to hear it? I would try to
> retard
> > the timing a bit to rule that out as well, just to
> > see... I had lifters act like that as well on a
> > 283, no clatter until a certain RPM, sounded like
> a
> > rist pin or piston slap. My $.02
> >
> > ----- Original Message ----
> > From: J. Brady <[EMAIL PROTECTED]>
> > To: Chevelle Group <chevelle-list@chevelles.net>
> > Sent: Friday, November 10, 2006 5:35:46 PM
> > Subject: [Chevelle-list] 327 question
> >
> > Drove the '66 to work today, and decided to throw
> > this
> > question out to "the Council":
> >
> > My car runs great, and the 327 has an aluminum
> > intake,
> > speed pro 10.5:1 pistons, crane powermax cam
> > (272/284), Comp Cams roller rockers, and freshly
> > built
> > camel hump heads with pinned in studs. Valves
> have
> > been redone within the past 2-3 years with MAYBE
> > 1000
> > miles on them, and I have new valve springs and
> > retainers (also Crane, to match the cam).
> >
> > All that being said, it runs great with one small
> > pet
> > peave.. When I drive the car it runs flawlessly
> > UNTIL
> > I get to 2000 RPMs on the tach, at which point I
> > hear
> > a slight "chatter". That's the only way I can
> > describe it. I've heard hung up lifters before,
> and
> > that's not the noise- that's a chronic
> > "tap-tap-tap-tap" (like 1-2-3-4). This, in my best
> > impression, goes "dadadadadadada" in a much faster
> > interval, thus the chatter description. It sounds
> > like it's on the driver side of the engine, and
> > happens ONLY at 2K RPMs.. I drop back, it goes
> > away-
> > I increase throttle PAST 2K RPMs, it goes away. I
> > thought maybe it might be something bumping the
> > dipstick or something stupid like that, so I moved
> > the
> > dipstick and it still happens.
> >
> > I don't think it's worth pulling the engine back
> out
> > to check, but it's damned frustrating. Anyone
> have
> > any guesses? I do not have valve guides and I
> > wondered if it might be that I need them. Another
> > note, I had the same noise when I had my 260/272
> cam
> > in it, which I just swapped out to the 272/284 as
> of
> > this year. I thought maybe the disassembly and
> > reassembly might make it go away (with
> readjustment
> > of
> > the valves), but it's still there so I'm guessing
> > it's
> > lower end noise. But from where and why ONLY at
> > that
> > revolution?
> >
> > Thanks in advance,
> >
> > Jim
> > '66 Malibu
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Cheap talk?
> > Check out Yahoo! Messenger's low PC-to-Phone call
> > rates.
> > http://voice.yahoo.com
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Want to start your own business?
> > Learn how on Yahoo! Small Business.
> > http://smallbusiness.yahoo.com/r-index
>
>
>
>
>
____________________________________________________________________________________
> Do you Yahoo!?
> Everyone is raving about the all-new Yahoo! Mail
> beta.
> http://new.mail.yahoo.com
>
>
>
>
>
>
>
>
>
>
____________________________________________________________________________________
> Do you Yahoo!?
> Everyone is raving about the all-new Yahoo! Mail
> beta.
> http://new.mail.yahoo.com
____________________________________________________________________________________
Cheap talk?
Check out Yahoo! Messenger's low PC-to-Phone call rates.
http://voice.yahoo.com
it continue at higher RPMs? That the part that's
eatin me.
Jim
--- Carl Ziegler <[EMAIL PROTECTED]> wrote:
> It could be an exhaust leak as well. Been there....
> Try adjusting the timing a few degrees. If nothing
> changes it might be in the lower end
> unfortunately...
>
> ----- Original Message ----
> From: J. Brady <[EMAIL PROTECTED]>
> To: The Chevelle Mailing List
> <chevelle-list@chevelles.net>
> Sent: Friday, November 10, 2006 5:58:12 PM
> Subject: Re: [Chevelle-list] 327 question
>
> That's exactly what I think it is Carl, sounds like
> a
> wrist pin or piston slap to me.
>
> I don't recall hearing it when in the driveway, only
> when out on the road.
>
> Jim
>
>
> --- Carl Ziegler <[EMAIL PROTECTED]> wrote:
>
> > Does it only happen when under a load or can you
> sit
> > there and rev it to hear it? I would try to
> retard
> > the timing a bit to rule that out as well, just to
> > see... I had lifters act like that as well on a
> > 283, no clatter until a certain RPM, sounded like
> a
> > rist pin or piston slap. My $.02
> >
> > ----- Original Message ----
> > From: J. Brady <[EMAIL PROTECTED]>
> > To: Chevelle Group <chevelle-list@chevelles.net>
> > Sent: Friday, November 10, 2006 5:35:46 PM
> > Subject: [Chevelle-list] 327 question
> >
> > Drove the '66 to work today, and decided to throw
> > this
> > question out to "the Council":
> >
> > My car runs great, and the 327 has an aluminum
> > intake,
> > speed pro 10.5:1 pistons, crane powermax cam
> > (272/284), Comp Cams roller rockers, and freshly
> > built
> > camel hump heads with pinned in studs. Valves
> have
> > been redone within the past 2-3 years with MAYBE
> > 1000
> > miles on them, and I have new valve springs and
> > retainers (also Crane, to match the cam).
> >
> > All that being said, it runs great with one small
> > pet
> > peave.. When I drive the car it runs flawlessly
> > UNTIL
> > I get to 2000 RPMs on the tach, at which point I
> > hear
> > a slight "chatter". That's the only way I can
> > describe it. I've heard hung up lifters before,
> and
> > that's not the noise- that's a chronic
> > "tap-tap-tap-tap" (like 1-2-3-4). This, in my best
> > impression, goes "dadadadadadada" in a much faster
> > interval, thus the chatter description. It sounds
> > like it's on the driver side of the engine, and
> > happens ONLY at 2K RPMs.. I drop back, it goes
> > away-
> > I increase throttle PAST 2K RPMs, it goes away. I
> > thought maybe it might be something bumping the
> > dipstick or something stupid like that, so I moved
> > the
> > dipstick and it still happens.
> >
> > I don't think it's worth pulling the engine back
> out
> > to check, but it's damned frustrating. Anyone
> have
> > any guesses? I do not have valve guides and I
> > wondered if it might be that I need them. Another
> > note, I had the same noise when I had my 260/272
> cam
> > in it, which I just swapped out to the 272/284 as
> of
> > this year. I thought maybe the disassembly and
> > reassembly might make it go away (with
> readjustment
> > of
> > the valves), but it's still there so I'm guessing
> > it's
> > lower end noise. But from where and why ONLY at
> > that
> > revolution?
> >
> > Thanks in advance,
> >
> > Jim
> > '66 Malibu
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Cheap talk?
> > Check out Yahoo! Messenger's low PC-to-Phone call
> > rates.
> > http://voice.yahoo.com
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
____________________________________________________________________________________
> > Want to start your own business?
> > Learn how on Yahoo! Small Business.
> > http://smallbusiness.yahoo.com/r-index
>
>
>
>
>
____________________________________________________________________________________
> Do you Yahoo!?
> Everyone is raving about the all-new Yahoo! Mail
> beta.
> http://new.mail.yahoo.com
>
>
>
>
>
>
>
>
>
>
____________________________________________________________________________________
> Do you Yahoo!?
> Everyone is raving about the all-new Yahoo! Mail
> beta.
> http://new.mail.yahoo.com
____________________________________________________________________________________
Cheap talk?
Check out Yahoo! Messenger's low PC-to-Phone call rates.
http://voice.yahoo.com
Want to start your own business? Learn how on Yahoo! Small Business.
