RE: [Chrysler300]Self Adjusting valves
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RE: [Chrysler300]Self Adjusting valves
- From: "Rich Barber" <c300@xxxxxxx>
- Date: Mon, 13 Apr 2009 22:36:34 -0700
All Chrysler 300's use reciprocating four-stroke cycle internal combustion
engines. These engines tend to make increased horsepower at higher RPM-up
to some thermal or mechanical limiting point. In earlier days RPM was
limited by hydraulic tappets that tended to stay fully extended at high RPM
and prevented intake and exhaust valve from fully closing. Solid tappets
required additional maintenance and produced a noisier engine at times but
allowed an engine to operate at higher RPM and horsepower. For instance,
the 331 in3 hemi engine of 1955 was rated at 250 HP @ 4,600 RPM with
hydraulic lifters and a single four barrel carburetor. By adding a "full
race" camshaft and a second carburetor and converting from hydraulic to
solid tappets/lifters, the upper end of the engine's operational range was
raised to 5,200 RPM. If torque remained constant, the increased RPM would
have resulted in a 283 HP rating. The modified camshaft and additional
carburetor resulted in greater fuel and air flow and the new engine was
rated at 300 HP @ 5,200 RPM. The rest is history.
Subsequent technology enabled use of hydraulic tappets at higher RPM and
also enabled properly feeding an engine with a single four barrel carburetor
(or no carburetor at all with various types of fuel injection), but the
visual impact of two four barrel carburetors, either in line under a Delta
Wing air cleaner, or out at the ends of ram intake manifolds under their own
individual goldine tin pots has yet to be equaled.
Or, such is my understanding and belief.
C-300'ly,
Rich Barber
Brentwood, CA
1955 Chrysler 300 (Intake system is an impressive work of art and
technology)
-----Original Message-----
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Warren Anderson
Sent: Monday, April 13, 2009 5:57 PM
To: 'George Riehl'; Chrysler300@xxxxxxxxxxxxxxx; Bob Jasinski
Subject: Re: [Chrysler300]Self Adjusting valves
The BMW Valvetronic technology may be what you saw referenced. Valvetronic
does more than adjust valves. Honda and Ford index overhead cams.
Valvetronic is at least two orders of magnitude above that basic technology.
Honda and Ford are not the only makes with variable valve timing BTW.
I think hydraulic lifters we have today are perfectly capable of keeping
up with the engine speeds and cam profiles that classic 300's had where
during their production years hydraulic lifter technology was not up to the
task. But there is the mystique of the solid lifter cam - --
Warren Anderson
Sedona,AZ
Thanks George. Do solid lifters really provide an increase in performance?
I just really wonder how much benefit there is compared to hydraulics. It
sure is nice never having to adjust valves. There was a BMW commercial
running just a few years back that touted the BMW had valves that
"adjusted
themselves" as if it was such an advanced feature. I chuckled at it and
told my wife that our 300G had self adjusting valves too.
Bob J
_____
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of George Riehl
Sent: Sunday, April 12, 2009 4:29 PM
To: 'Fern'; 'Jim Maiani'; Chrysler300@xxxxxxxxxxxxxxx; Bob Jasinski
Subject: Re: [Chrysler300] Adjusting valves
Hi Bob; The J and ram K also has soilid lifters, the non-ram is hyd, and
the
L has hyd. lifters. The '59, '60 & '61 were hyd. except for the 400 H.P.
option.
George
----- Original Message -----
From: Bob Jasinski
To: 'Fern' ; 'Jim Maiani' ; Chrysler300@
<mailto:Chrysler300%40yahoogroups.com> yahoogroups.com
Sent: Sunday, April 12, 2009 5:06 PM
Subject: RE: [Chrysler300] Adjusting valves
Well I guess you learn something new everyday. I didn't know the H had
solid lifters, does the J, K & L have solid lifters too?
Bob J
_____
From: Chrysler300@ <mailto:Chrysler300%40yahoogroups.com> yahoogroups.com
[mailto:Chrysler300@ <mailto:Chrysler300%40yahoogroups.com>
yahoogroups.com]
On
Behalf Of Fern
Sent: Sunday, April 12, 2009 10:34 AM
To: 'Jim Maiani'; Chrysler300@ <mailto:Chrysler300%40yahoogroups.com>
yahoogroups.com; Bob Jasinski
Subject: Re: [Chrysler300] Adjusting valves
The stock 413 engine in the 1962 300H HAS solid lifters. If I was doing it
over again, I would have converted the one in my 300H conv to hydraulic
lifters to eliminate that extra maintenance. Fern
----- Original Message -----
From: Bob Jasinski
To: 'Jim Maiani' ; Chrysler300@ <mailto:Chrysler300%40yahoogroups.com>
yahoogroups.com
Sent: Sunday, April 12, 2009 10:51 AM
Subject: RE: [Chrysler300] Adjusting valves
Jim,
You should have hydraulic lifters in your 413 that do not require
adjustment, you won't find any adjusters on the rocker arms.
Bob J
_____
From: Chrysler300@ <mailto:Chrysler300%40yahoogroups.com> yahoogroups.com
[mailto:Chrysler300@ <mailto:Chrysler300%40yahoogroups.com>
yahoogroups.com]
On
Behalf Of Jim Maiani
Sent: Friday, April 10, 2009 6:37 AM
To: Chrysler300@ <mailto:Chrysler300%40yahoogroups.com> yahoogroups.com
Subject: [Chrysler300] Adjusting valves
Good morning group. I hope everyone is doing well. I'm not a mechanic, so
I've hired a Mechanic to help me and he has a question that I KNOW someone
can answer. Keep in mind this is the first Chrysler he's worked on. (Don't
laugh....he's a Chevy guy)(I guess somebody has to drive those things).
We've dug in and are replacing valve seals in my original 413 in my H.
(The
original seals are as hard as metal). He's concerned about adjusting the
valves once we're done. He's explained how he does it in a Chevy, but says
it's different here. I have an original service manual, but I can't find
any
procedure on how to adjust the valves. Now the question:
Do the valves need to be adjusted? (I would think they do, listening to
him). Can someone explain how to do this?
Thanks as always for your help
Jim Maiani
Houghton Lake Michigan (where we still have snow piled up in places)
300-H
From: Knutsen, Mark C
Sent: Thursday, April 09, 2009 5:34 PM
To: Chrysler300@ <mailto:Chrysler300%40yahoogroups.com> yahoogroups.com
Subject: [Chrysler300] 1961 G - Dash Color & Paint Type
Has anyone had their dash painted as part of a restoration? Any tips on
color match & type of paint would be greatly appreciated.
Happy holidays!
Mark Knutsen
300 G (One more door and soon to be painted!)
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