Home » Public Forums » GMCnet » Mondello roller RV CAM KIT (Roller Camshaft)
| Mondello roller RV CAM KIT [message #318620] |
Wed, 07 June 2017 00:44  |
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Husker92592
Messages: 137
Registered: August 2013
Location: Temecula ca
Karma: -4
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I am checking the masses, has anyone used this set up? I have seen some traffic on the net that Mondello in Paso Robles is marginal at best. I see they have a roller cam and roller tip rocker set up that is a direct fit in a stock block.
Thanks
Grant
1974 GMC Sequoia 26'
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| Re: Mondello roller RV CAM KIT [message #318669 is a reply to message #318620] |
Wed, 07 June 2017 15:52  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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They are pretty much trading on the late Joe Mondello's name.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318753 is a reply to message #318638] |
Thu, 08 June 2017 23:40 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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If your interested in Roller Lifters,Contact Comp CAM as they make good
cams and be sure you get the RV cam profile.
Once you get the part#, hit Summit and us for pricing.
Depending on which intake your running, I'l need to advise on a slight mod
you'll need to do.
Also the distributor gear must be addressed.
We have done few on the coaches so we know the issues. Call me for free
advise before you do it.
On Wed, Jun 7, 2017 at 7:20 AM, Gary Worobec wrote:
> Grant, Mondello makes great 10 second engines for drag racing but I don;t
> believe the GMC community has had much success with their stuff. There is
> not much transfer between their race type engines and the ability to push
> 12,000 lbs.
>
> GW
>> On Jun 6, 2017, at 10:44 PM, Grant Schaffer
> wrote:
>>
>> I am checking the masses, has anyone used this set up? I have seen some
> traffic on the net that Mondello in Paso Robles is marginal at best. I see
>> they have a roller cam and roller tip rocker set up that is a direct fit
> in a stock block.
>> Thanks
>> Grant
>> --
>> 1974 GMC Sequoia 26'
>>
>>
>> _______________________________________________
>> GMCnet mailing list
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> Gary Worobec
> garytwmw@gmail.com
> (o) 951-763-0518
> (cell) 773-230-6226
>
>
>
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318756 is a reply to message #318753] |
Fri, 09 June 2017 01:15 |
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Husker92592
Messages: 137
Registered: August 2013
Location: Temecula ca
Karma: -4
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They claim they have a matched set , rv grind, drop in roller lifters with matched push rods and roller rockers with guide plates. I also understand with late model chevy's that they need a cam button to keep things from walking is his the same with the Oldsmobile?
Overall I guess that wannabe mondello in cali Is full of it?
I have a .60 over block that is all together recently re manufactured so thinking about changing the cam to a roller. Seems to be more trouble than it's worth as I am running in to most things with an Oldsmobile coach.
Thoughts?
1974 GMC Sequoia 26'
[Updated on: Fri, 09 June 2017 01:24] Report message to a moderator |
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318757 is a reply to message #318753] |
Fri, 09 June 2017 01:22 |
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Husker92592
Messages: 137
Registered: August 2013
Location: Temecula ca
Karma: -4
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Thanks Jim , I am running a offenhouser intake. I have decided to raise the deck and push away from the sunken in stock intake. Not sure this helps but I have seen too many posts on making adjustments to the "new" aluminum stock Intake and the cast iron original needs to go in my opinion.
Grant
1974 GMC Sequoia 26'
[Updated on: Sun, 11 June 2017 11:30] Report message to a moderator |
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| Re: Mondello roller RV CAM KIT [message #318762 is a reply to message #318620] |
Fri, 09 June 2017 08:17 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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The engine in my coach is a roller motor, although at the speeds we turn them I fail to see much benefit. If you use a Diesel grade oil, it probably has sufficient zinc to keep the lifter surfaces alive, or you can toss in a can of additive.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318792 is a reply to message #318757] |
Fri, 09 June 2017 22:31 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Grant,
The type of metal used on the roll cam is not compatible with our
distributor gear.
I heard that they have overcome that.
Never use Brass gear on distributor.
We used them for drag racing, but caused 3 engine failure wen the brass got
into the bearings.
On Thu, Jun 8, 2017 at 11:22 PM, Grant Schaffer
wrote:
> Thanks Jim , I am running a offenhouser intake. I have decided to raise
> the deck and push away from the sunken in stock intake. Not sure this helps
> but I have seen too many posts on making adjustments to the "new"
> aluminum stock I take and the cast iron needs to go in my opinion.
> Grant
> --
> 1974 GMC Sequoia 26'
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318822 is a reply to message #318792] |
Sat, 10 June 2017 13:50 |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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After a ton of research, I used a Lunati roller cam. The specs on this keep it within safe lift range for our engines.
I tried to check out the mondello stuff, but it was pretty much a joke. There's no "Joe" left there and the company is a lot less than helpful.
(The east coast company doesn't do the cams, and seemed really disgusted with the west coast company, which is now an unrelated entity.)
Lunati, on the other hand, was terrific to deal with and super helpful. Anyway, here are the part numbers:
Lunati 20420503 http://www.lunatipower.com/Product.aspx?id=3202&gid=137
I used the Comp Cams lifters because Lunati didn't have anything appropriate and suggested the compcams.
The tops of these are cut so they fit under the stock manifold without modification:
COMP Cams Hydraulic Roller Lifters 857-16 https://www.summitracing.com/parts/CCA-857-16
After discussing it with Lunati, I went with our stock rockers but upgraded the springs since I didn't know what was on our engine.
Dick Paterson uses these valve springs on his (non roller) rebuilds:
COMP Cams Valve Springs 901-16 https://www.summitracing.com/parts/CCA-901-16
The machine shop guy who did the heads tested them and they were fine for the roller cam and our application.
(Turns out the ones on our engine were too wimpy, so good I had these in hand.)
If I were doing it again, I might go ahead and spring for roller tip adjustable rockers "just cuz".
It would certainly make the pushrod selection easier. I'm told now there are some roller tip rocker kits that fit
without extra machining, which I was trying to avoid.
Since I didn't know what gear was on our distributor, I replaced it with this:
Summit Racing® Distributor Gears SUM-850006-12 https://www.summitracing.com/parts/SUM-850006-12
It was really nice to be able to just start the engine without the teeth-gnashing startup procedure of a flat cam.
Good thing because there was a significant oil leak and I had to shut it down earlier than a flat cam would have needed for break-in.
So far (only about 5K miles), so good.
jwid,
Karen
1975 26'
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318854 is a reply to message #318853] |
Sun, 11 June 2017 11:25 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Properly a very good question why GM choose to develop a different "455" engine for Olds, Pontiac, and Buick, with little interchange. Just because they could is a poor answer. Both Ford and Chrysler were using corporate big blocks. Stockholders should have screamed.
Glad that I was not one of their bond holders.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #318858 is a reply to message #318853] |
Sun, 11 June 2017 12:58 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Husker92592 wrote on Sun, 11 June 2017 12:16Thanks Karen
<snip>
Can someone tell me after all these years, other than it's no longer manufactured, why GM went out of their way to have the Oldsmobile engine to be different from any other? Diving into the forum seems there's always an opinion, at time good but usually different. I can go to any junk yard pull a 350 chevy hone it new parts and considerably run it successfully with very little machining. I know we don't want that in a 12,000 motor home but it always seems that productions 403 and 455's are "special". Our coach is bad enough.
I am trying to understand why GM would go to these lengths to spend the extra time and money, if anyone knows what I mean. This overlying "special" tone is convincing me that buying my coach was a mistake. Would this be why they were discontinued?
Thanks for anyone opinion.
Grant,
It should be no embarrassment, but it is clear that you do not understand Detroit Original Equipment thinking.
GM was not first at anything. William Durant (who hated motorcars) was head of the Durant(Buick) Carriage company, but he could see the writing on the wall. He started General Motors in 1908 and bought up all of Buick. So it went. He later bough Cadillac from remains of the first Ford Motor companies failure. Then he bought Chevrolet from the two Swiss brothers that were making decent cars but having money troubles. Oldsmobile was bought directly from the Olds family. They didn't get out of the business and when on with REO (Ransom E Olds) vehicles.
All this said, there were now a bunch of individual companies held be single management. After a few more acquisitions, there were a bunch that soon formed into two groups. Buick, Oldsmobile and Cadillac (BOC - Big Opulent Cars) and Chevrolet, Pontiac and the Canadians (CPC aka Cheap Practical Cars). <= This is not a joke.....
These were all fiercely independent groups. They all did their own development and all had their owe durability requirement. Olds and Cad were universally accepted as the highest standard as any engine parts supplier at the time could tell you. Each of BOC had their own foundries and critical parts lines. Those without such were forced by management to source parts from lowest cost internal suppliers.
Needless to say, the higher quality, but lower volume parts had a cost disadvantage. Both Oldsmobile and Cadillac engines have been widely used in industrial applications. Many have tried to do the same with engines out of Central Foundry (three locations) and Tonowanda. The GM small block and big block lines, but as soon as reliability and became more important than first cost, they lost every time. (There is a reason for the nickname of the CBB.) It was not just the nickel content of the crankcase/cylinder blocks that was an issue, but also bearing materials and valve seat hardness.
In the mid-70s, GM management forced to adoption of corporate engines (aka the cheapies) on Buick and Olds and only much later Cadillac. As soon as clients found out, there was both a scream and an loss of market share.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Mondello roller RV CAM KIT [message #318874 is a reply to message #318620] |
Sun, 11 June 2017 22:46 |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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I can see why they use roller cams in hot boats and dragsters.
But for a motorhome that rarely sees 3500 RPM, it doesn't add much. It only costs more.
I'm happy with my $140 Sealed Power CS651 camshaft and $85 for a set of 16 flat tappets.
CS651 Cam----CS651 61 275/289 .437/.437 ILC=108 ELC=110 @ 0.050"-----194/207
No problem with cam wear using stock valve springs and ZDDP for break in.
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: Mondello roller RV CAM KIT [message #318876 is a reply to message #318874] |
Mon, 12 June 2017 04:19 |
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Loffen
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
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I had my roller cam made by Crane, the main reason is that they use a incorporates an integral cast iron distributor drive gear, aluminum-bronze distributor drive gear is not required.
Their lowest stock Olds roller profile was a little high for the GMC so I had the cam made with a intake profile HR-204/286, exhaust profile HR-214/325, on a 112 lobe separation, with 5 degrees advance, that is the same profile used on Chevy 454-502 Gen IV engines for towing with a 800 to 5000 Rpm range
My engine has s CR of 9.5 with alu heads, Rockwell intake and a Fitech TBI (That was started up for the first time yesterday) so I can not share any driving experiense but it sounds good, a little low vacume due to the high lift but nothing to worry about (15 Hg)
I also use :
Harland Sharp Roller Rocker Arms
HOWARD'S CAMS Street Series Retro-Fit Hyd Roller Lifters (This is the ones that other rebrands and say that are theirs)
Crane Pro-Series Pushrods
ARP 100-7101 Rocker Arm Studs
Crane Cams 99838-16 Dual Valve Springs
Crane Cams 99953-16 Valve Spring Retainers
Comp Cams 3113 Timing Set
Std Melling oil pump
No oil restrictors from Mondello, they will only reduce oilflow to the camshaft and NOT to the cylinder heads, take a look at the Olds oil system and you will find that it is useless..
1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green,
And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel
in Norway
[Updated on: Mon, 12 June 2017 08:38] Report message to a moderator |
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| Re: Mondello roller RV CAM KIT [message #318878 is a reply to message #318620] |
Mon, 12 June 2017 08:24 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Why the different engines? Speculation: Oldsmobile wanted something smooth and effortless for your grandma in her 98. Cost wasn't a great factor, load the block with a lot of nickle and it will run six forevers and hopefully grandma will buy another one in a year or three. Pontiac wanted a hotrod, the Olds undersquare engine is hardly that. Plus, they could turn the blocks on the same transfer line as the 389CID setup I believe. Buick - who knows, other than extending the 'nailhead' was possible. GM divisions at the time didn't talk to one another in the way the Mopar guys did, which helped make the different engines appear.
Your speculation?
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Mondello roller RV CAM KIT [message #319786 is a reply to message #318876] |
Thu, 29 June 2017 21:04 |
rickmike
Messages: 252
Registered: September 2011
Location: United States
Karma: 0
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Could you list the part numbers for these parts?
Harland Sharp Roller Rocker Arms
HOWARD'S CAMS Street Series Retro-Fit Hyd Roller Lifters (This is the ones that other rebrands and say that are theirs)
Crane Pro-Series Pushrods
Thanks.
Rick M.
Loffen wrote on Mon, 12 June 2017 05:19I had my roller cam made by Crane, the main reason is that they use a incorporates an integral cast iron distributor drive gear, aluminum-bronze distributor drive gear is not required.
Their lowest stock Olds roller profile was a little high for the GMC so I had the cam made with a intake profile HR-204/286, exhaust profile HR-214/325, on a 112 lobe separation, with 5 degrees advance, that is the same profile used on Chevy 454-502 Gen IV engines for towing with a 800 to 5000 Rpm range
My engine has s CR of 9.5 with alu heads, Rockwell intake and a Fitech TBI (That was started up for the first time yesterday) so I can not share any driving experiense but it sounds good, a little low vacume due to the high lift but nothing to worry about (15 Hg)
I also use :
Harland Sharp Roller Rocker Arms
HOWARD'S CAMS Street Series Retro-Fit Hyd Roller Lifters (This is the ones that other rebrands and say that are theirs)
Crane Pro-Series Pushrods
ARP 100-7101 Rocker Arm Studs
Crane Cams 99838-16 Dual Valve Springs
Crane Cams 99953-16 Valve Spring Retainers
Comp Cams 3113 Timing Set
Std Melling oil pump
No oil restrictors from Mondello, they will only reduce oilflow to the camshaft and NOT to the cylinder heads, take a look at the Olds oil system and you will find that it is useless..
1974 26' Canyonlands
aka "The General"
Clinton, TN
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| Re: [GMCnet] Mondello roller RV CAM KIT [message #342106 is a reply to message #342102] |
Sun, 31 March 2019 15:44 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Grant, motorhome service is considered extreme service. I know of several
Brand New big block (454 cu.in.) Chevrolet conversions to GMC coaches that
were done in a shop near Sequim Washington using the best heavy duty parts
available. I know of NONE of them that went over about 50,000 miles. I
personally have 130,000 miles on my 403 Olds in my GMC, and know of several
others, both 455 and 403 cu in that have that many or more. Our lab rat
guys that worked in test cells doing durability test to destruct
evaluations on GM engines will tell you straight out that the high nickel
casting Olds blocks were the best of the bunch, with Chev bringing up the
rear of the pack, particularly the ones made in the Tonowanda engine plant.
It's your money, spend it wisely.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Sun, Mar 31, 2019, 1:25 PM Grant Schaffer via Gmclist <
gmclist@list.gmcnet.org> wrote:
> So my situation is i/ we spend tons of money on engine rebuilds and it
> seems the prevention in the group is the Oldsmobile engine is inferior. No
> brass cam gear need one, plug off the eye passage carb or efi, No zinc
> need zinc, synthetic no synthetic , don't do this to the engine but you have
> to do this, no roller need a roller cam, if you don't break it in
> correctly you get to start over. It seems I /are am spending quite a bit of
> money on
> a coach that isn't seems to be plagued with problems. I can take a
> Chevy/my 350 same year out of the junk yard rebuilding it with min.
> Resources and
> it's will be solid. So I suppose the Oldsmobile is not as good? I have a
> hard time believing the go enginneers did know what they were doing.
>
> Here is what would be an idea, create a standard engine cam combo and a
> list of parts for this items to "upgrade" not all the information on the
> forum
> seems slighted to an engine and a coach that is plagued with issues.
> --
> 1974 GMC Sequoia 26'
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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