OIl Restrictors and other myths to slay before they kill our GMCs or our wallets

T

thomas g. warner

New member
Mar 24, 1998
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and here is my parting shot for the night more myths to shoot.

http://www.4m.net/4Ms/PowerTrain/messages/342.shtml

General Rules of thumb:
Use restrictors if you have full roller rockers and flat tappet cam.
Do not use restrictors if you have stamped steel rockers(they need the extra
oil) or if use a roller cam(not sure on why here, but it is what I do and
see others doing)
FYI sixwillwin
- ----------------------------------

Want to read the messages from racers?
http://www.4m.net/4Ms/PowerTrain/messages/3.shtml
- -----------------------------------------------------

http://www.4m.net/4Ms/PowerTrain/messages/428.shtml

Re: HEI upgrades - what works?
Posted by 06racin on May 12, 1999 at 09:22
In Reply to: HEI upgrades - what works? posted by Mike-E
Mike i just switched to M.S.D big green module and there super conducter 8.5
wires. Wow beleve me i could tell the differnce the first night out all the
way up to 6500rpm . I also use the white wire coil it has more amps than the
yellow wire coil. as for as plugs i use A.C.`s. If cost is an issue just be
sure and use good spiral plug wires to prevent crossfire because sooner or
later crossfire will cost you a engine..Been there!!!!!

- ------------------------
http://www.4m.net/4Ms/PowerTrain/messages/448.shtml
Re: HEI upgrades - what works?
Posted by snevets on May 25, 1999 at 01:03
In Reply to: Re: HEI upgrades - what works? posted by movinmark
We have run the stock HEI up to 7200 and never skipped a beat. The trick is
to keep
everything in good condition. We have run an msd and could not tell any
difference
over the stock ignition. We heve run Autolites and Motorcraft plugs gapped
at .040.
I believe any brand will work as long as you get your heat range right.
- -----------------------
Thermostats anyone?
Posted by Sidebite on Apr 08, 1999 at 09:23
Since an alcohol engine runs cooler than a gas engine, will it ever get hot
enough to open a thermostat or does everyone just run flow restrictors?

- ----------------------

>Chuck
>I've asked this question before but can't locate the answer.....does
>the same apply for the 403 or is this just a 455 thing...
>
>Mike Beaton Antigonish NS 403 Kingsley
>Looking for info on How To File Messages :-)
>
>> The oil restrictors are installed at the lower end of the motor so the
>> oil will or can not be pumped up into the top of the engine so fast. It
>> is important to keep the oil in the lower end (bearings). If this is not
>> accomplished during the engine rebuild when you get the GMC out on the
>> highway after break-in in etc. You will find that driving 65 and up you
>> will have al the oil pumped into the top end, Rocker Covers will be
>> full. This is not where you end immediate lubrication if you slow down
>> or even have to come to a stop and go situation. What will happen is the
>> engine will continue to turn without I repeat without the proper
>> lubrication and you will score your main bearings. This makes a loud
>> noise that you will certainly notice. I am deaf and I can hear it. When
>> you hear it, it is to late the damage is done! Joe Mondelo discuses this
>> in his engine rebuilding in the GMCMM magazine. Chuck Lompoc
>>
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
"The beautiful Mohawk Vally"
 
So I guess what we're saying is that Mondello's article in the GMCMM is out
of context for our engine's??

Paul Bartz

- -----Original Message-----
From: Tom Warner [mailto:warner]
Sent: Sunday, June 20, 1999 9:27 PM
To: gmcmotorhome
Subject: Re: GMC: OIl Restrictors and other myths to slay before they
kill our GMCs or our wallets

and here is my parting shot for the night more myths to shoot.
http://www.4m.net/4Ms/PowerTrain/messages/342.shtml
http://www.4m.net/4Ms/PowerTrain/messages/342.shtml
General Rules of thumb:
Use restrictors if you have full roller rockers and flat tappet cam. Do not
use restrictors if you have stamped steel rockers(they need the extra oil)
or if use a roller cam(not sure on why here, but it is what I do and see
others doing)
FYI sixwillwin
Want to read the messages from racers?
http://www.4m.net/4Ms/PowerTrain/messages/3.shtml
http://www.4m.net/4Ms/PowerTrain/messages/3.shtml

http://www.4m.net/4Ms/PowerTrain/messages/428.shtml
http://www.4m.net/4Ms/PowerTrain/messages/428.shtml
Re: HEI upgrades - what works?
Posted by 06racin on May 12, 1999 at 09:22
In Reply to: HEI upgrades - what works? posted by Mike-E
Mike i just switched to M.S.D big green module and there super conducter 8.5
wires. Wow beleve me i could tell the differnce the first night out all the
way up to 6500rpm . I also use the white wire coil it has more amps than the
yellow wire coil. as for as plugs i use A.C.'s. If cost is an issue just be
sure and use good spiral plug wires to prevent crossfire because sooner or
later crossfire will cost you a engine..Been there!!!!!
http://www.4m.net/4Ms/PowerTrain/messages/448.shtml
http://www.4m.net/4Ms/PowerTrain/messages/448.shtml
Re: HEI upgrades - what works?
Posted by snevets on May 25, 1999 at 01:03
In Reply to: Re: HEI upgrades - what works? posted by movinmark
We have run the stock HEI up to 7200 and never skipped a beat. The trick is
to keep everything in good condition. We have run an msd and could not tell
any difference over the stock ignition. We heve run Autolites and Motorcraft
plugs gapped at .040.
I believe any brand will work as long as you get your heat range right.
Thermostats anyone?
Posted by Sidebite on Apr 08, 1999 at 09:23

Since an alcohol engine runs cooler than a gas engine, will it ever get hot
enough to open a thermostat or does everyone just run flow restrictors?

Chuck

I've asked this question before but can't locate the answer.....does the
same apply for the 403 or is this just a 455 thing...

Mike Beaton Antigonish NS 403 Kingsley

The oil restrictors are installed at the lower end of the motor so the oil
will or can not be pumped up into the top of the engine so fast. It is
important to keep the oil in the lower end (bearings). If this is not
accomplished during the engine rebuild when you get the GMC out on the
highway after break-in in etc. You will find that driving 65 and up you
will have al the oil pumped into the top end, Rocker Covers will be full.
This is not where you end immediate lubrication if you slow down or even
have to come to a stop and go situation. What will happen is the engine
will continue to turn without I repeat without the proper lubrication and
you will score your main bearings. This makes a loud noise that you will
certainly notice. I am deaf and I can hear it. When you hear it, it is to
late the damage is done! Joe Mondelo discuses this in his engine rebuilding
in the GMCMM magazine.

Chuck Lompoc
 
>
> So I guess what we're saying is that Mondello's article in the GMCMM is out
> of context for our engine's??
>
> Paul Bartz

That's my opinion. Most of Mondello's articles, including the ones
"reprinted"(I've suspected since the "403" piece a couple years back
that these articles are not written exclusively for GMCMM) in GMCMM,
appear to be written for a "generic" audience, mainly street performance
and racing types. While Joe certainly recognizes GMCs as a fertile
market for his products, those other guys are still his bread 'n
butter. Arch's buddy hit the nail squarely on the head - unless your
running in excess of 4,000 rpm(I know Arch's friend said 6,000, but I'm
pretty sure it was Dick Paterson at Marion that said 4,000) for extended
periods, it just ain't an issue.

A digipanel would cost less to install(especially if you're thinking of
pulling the engine to install restrictors) and would tell you
immediately if your oil pump sucked air.

My $.02,
Patrick
 
Patrick:

I to, have a concern for all of the Mondello articles that have appeared in
the GMCMM over the past year or so. In fact, after the very first article
appeared, I e-mailed Steve Galovic to tell him that I thought it was one of
the most poorly written and dis-jointed articles I had ever seen.

Also, in my opinion, most of the content of the articles is related to
Oldmosbile racing engine applications. Think where that leaves the
unsuspecting GMC Motorhome reader who thinks they're reading the "gospel"!

So Chuck Will, how did you get hoodwinked into believing that the engine oil
restrictors are required on our engines???

Paul Bartz

From: Patrick Flowers [mailto:patri63]
Sent: Monday, June 21, 1999 11:30 AM
Subject: Re: GMC: Oil Restrictors and other myths to slay before they
kill our GMCs or our wallets

So I guess what we're saying is that Mondello's article in the GMCMM is out
of context for our engine's??

That's my opinion. Most of Mondello's articles, including the ones
"reprinted" (I've suspected since the "403" piece a couple years back that
these articles are not written exclusively for GMCMM) in GMCMM, appear to be
written for a "generic" audience, mainly street performance and racing
types. While Joe certainly recognizes GMCs as a fertile market for his
products, those other guys are still his bread 'n butter. Arch's buddy hit
the nail squarely on the head - unless your running in excess of 4,000 rpm(I
know Arch's friend said 6,000, but I'm pretty sure it was Dick Paterson at
Marion that said 4,000) for extended periods, it just ain't an issue.

A digipanel would cost less to install (especially if you're thinking of
pulling the engine to install restrictors) and would tell you immediately
if your oil pump sucked air.
 
I did not say that at all. Which of his many articles are you referring to.
bottom line is that sometimes auto ghrus get a little enthusiastic for some
of the things that they were responsible for. mondello is no different on
that count.

>So I guess what we're saying is that Mondello's article in the GMCMM is out
>of context for our engine's??
>
> Paul Bartz
>
>-----Original Message-----
>From: Tom Warner [mailto:warner]
>Sent: Sunday, June 20, 1999 9:27 PM
>To: gmcmotorhome
>Subject: Re: GMC: OIl Restrictors and other myths to slay before they
>kill our GMCs or our wallets
>
>and here is my parting shot for the night more myths to shoot.
>http://www.4m.net/4Ms/PowerTrain/messages/342.shtml
>http://www.4m.net/4Ms/PowerTrain/messages/342.shtml
>General Rules of thumb:
>Use restrictors if you have full roller rockers and flat tappet cam. Do not
>use restrictors if you have stamped steel rockers(they need the extra oil)
>or if use a roller cam(not sure on why here, but it is what I do and see
>others doing)
>FYI sixwillwin
>Want to read the messages from racers?
>http://www.4m.net/4Ms/PowerTrain/messages/3.shtml
>http://www.4m.net/4Ms/PowerTrain/messages/3.shtml
>
>http://www.4m.net/4Ms/PowerTrain/messages/428.shtml
>http://www.4m.net/4Ms/PowerTrain/messages/428.shtml
>Re: HEI upgrades - what works?
>Posted by 06racin on May 12, 1999 at 09:22
>In Reply to: HEI upgrades - what works? posted by Mike-E
>Mike i just switched to M.S.D big green module and there super conducter 8.5
>wires. Wow beleve me i could tell the differnce the first night out all the
>way up to 6500rpm . I also use the white wire coil it has more amps than the
>yellow wire coil. as for as plugs i use A.C.'s. If cost is an issue just be
>sure and use good spiral plug wires to prevent crossfire because sooner or
>later crossfire will cost you a engine..Been there!!!!!
>http://www.4m.net/4Ms/PowerTrain/messages/448.shtml
>http://www.4m.net/4Ms/PowerTrain/messages/448.shtml
>Re: HEI upgrades - what works?
>Posted by snevets on May 25, 1999 at 01:03
>In Reply to: Re: HEI upgrades - what works? posted by movinmark
>We have run the stock HEI up to 7200 and never skipped a beat. The trick is
>to keep everything in good condition. We have run an msd and could not tell
>any difference over the stock ignition. We heve run Autolites and Motorcraft
>plugs gapped at .040.
>I believe any brand will work as long as you get your heat range right.
>Thermostats anyone?
>Posted by Sidebite on Apr 08, 1999 at 09:23
>
>Since an alcohol engine runs cooler than a gas engine, will it ever get hot
>enough to open a thermostat or does everyone just run flow restrictors?

>Chuck
>
>I've asked this question before but can't locate the answer.....does the
>same apply for the 403 or is this just a 455 thing...
>
>Mike Beaton Antigonish NS 403 Kingsley
>
>The oil restrictors are installed at the lower end of the motor so the oil
>will or can not be pumped up into the top of the engine so fast. It is
>important to keep the oil in the lower end (bearings). If this is not
>accomplished during the engine rebuild when you get the GMC out on the
>highway after break-in in etc. You will find that driving 65 and up you
>will have al the oil pumped into the top end, Rocker Covers will be full.
>This is not where you end immediate lubrication if you slow down or even
>have to come to a stop and go situation. What will happen is the engine
>will continue to turn without I repeat without the proper lubrication and
>you will score your main bearings. This makes a loud noise that you will
>certainly notice. I am deaf and I can hear it. When you hear it, it is to
>late the damage is done! Joe Mondelo discuses this in his engine rebuilding
>in the GMCMM magazine.
>
>Chuck Lompoc
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
"The beautiful Mohawk Vally"
 
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