performance camshaft?
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Elder User
Joined: Sep 2005
Posts: 641
Likes: 1
From: Delta B.C.
performance camshaft?
Looking on the summitracing website they claim the melling camshaft to be this:
"These Melling M-Select Torque cam and lifter kits are designed for the perfect upgrade of your stock camshaft. They will provide a smooth idle, good low-end torque, and excellent pulling power. The Melling M-Select Torque cam and lifter kits include a matched set of Topline lifters to complete the installation. Rebuilding or upgrading your engine? Try one of these Melling M-Select Torque cam and lifter kits for maximum reliability."
This is the SIH-6 cam...
I cant find any info from melling saying this is a performance cam, or anything other than stock...
any input??
Thanks
Bob
"These Melling M-Select Torque cam and lifter kits are designed for the perfect upgrade of your stock camshaft. They will provide a smooth idle, good low-end torque, and excellent pulling power. The Melling M-Select Torque cam and lifter kits include a matched set of Topline lifters to complete the installation. Rebuilding or upgrading your engine? Try one of these Melling M-Select Torque cam and lifter kits for maximum reliability."
This is the SIH-6 cam...
I cant find any info from melling saying this is a performance cam, or anything other than stock...
any input??
Thanks
Bob
Last edited by Mr. Bob; Feb 13, 2007 at 12:45 AM.
Thread Starter
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Elder User
Joined: Sep 2005
Posts: 641
Likes: 1
From: Delta B.C.
The Numbers....
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: RPM
Intake Duration at 050 inch Lift: 176
Exhaust Duration at 050 inch Lift: 184
Duration at 050 inch Lift: 176 int./184 exh.
Advertised Intake Duration: 174
Advertised Exhaust Duration: 210
Advertised Duration: 174 int./210 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.406 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.405 in.
Valve Lift with Factory Rocker Arm Ratio: 0.406 int./0.405 exh. lift
Lobe Separation (degrees): 103
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Lifters Included: Yes
Lifter Style: Hydraulic flat tappet
I also thought these were roller cams??? may be not though....
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: RPM
Intake Duration at 050 inch Lift: 176
Exhaust Duration at 050 inch Lift: 184
Duration at 050 inch Lift: 176 int./184 exh.
Advertised Intake Duration: 174
Advertised Exhaust Duration: 210
Advertised Duration: 174 int./210 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.406 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.405 in.
Valve Lift with Factory Rocker Arm Ratio: 0.406 int./0.405 exh. lift
Lobe Separation (degrees): 103
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Lifters Included: Yes
Lifter Style: Hydraulic flat tappet
I also thought these were roller cams??? may be not though....
Posting Guru
Joined: Aug 2006
Posts: 2,175
Likes: 0
From: Kent WA
Originally Posted by Mr. Bob
The Numbers....
Melling Specs
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: RPM
Intake Duration at 050 inch Lift: 176
Exhaust Duration at 050 inch Lift: 184
Duration at 050 inch Lift: 176 int./184 exh.
Factory Specs
Advertised Intake Duration: 174
Advertised Exhaust Duration: 210
Advertised Duration: 174 int./210 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.406 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.405 in.
Valve Lift with Factory Rocker Arm Ratio: 0.406 int./0.405 exh. lift
Common Specs
Lobe Separation (degrees): 103
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Lifters Included: Yes
Lifter Style: Hydraulic flat tappet
I also thought these were roller cams??? may be not though....
Melling Specs
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: RPM
Intake Duration at 050 inch Lift: 176
Exhaust Duration at 050 inch Lift: 184
Duration at 050 inch Lift: 176 int./184 exh.
Factory Specs
Advertised Intake Duration: 174
Advertised Exhaust Duration: 210
Advertised Duration: 174 int./210 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.406 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.405 in.
Valve Lift with Factory Rocker Arm Ratio: 0.406 int./0.405 exh. lift
Common Specs
Lobe Separation (degrees): 103
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Lifters Included: Yes
Lifter Style: Hydraulic flat tappet
I also thought these were roller cams??? may be not though....
If I'm interpreting that right the Melling has .094" more lift and .002 more duration on intake but .026 less duration on exhaust. Is that right?
I'm thinking that .094" increase in lift should more than compensate for the shorter exhaust duration to let it breathe better - especially when combined with the slight increase in intake duration...
Last edited by CheaperJeeper; Feb 13, 2007 at 12:59 AM.
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
FWIW: Summits item descriptions are notoriously inacurate. I'd do more research before installing one.
With .094 increased lift, you better have some darned good springs when you get up to 2800+RPM's.
IF it is a flat tappet cam, you might get away with it. Personally, I'd stick with rollers, for less friction, longer engine life.
With .094 increased lift, you better have some darned good springs when you get up to 2800+RPM's.
IF it is a flat tappet cam, you might get away with it. Personally, I'd stick with rollers, for less friction, longer engine life.
Elder User
Joined: Dec 2006
Posts: 559
Likes: 4
From: On a farm.
One thing to rememberrabout diesel cams... you don't have much room to play with duration or lift when you have a piston that comes up within a few thousanths of the head. As a result, the effect of a cam change is usually minimal. Based on these specs, I doubt this cam would have much of an effect on performance and, like fonefiddy above, I wouldn't like to revert to flat tappet lifters. If you needed a cam at overhaul... maybe. Otherwise the dollar-per-horsepower rating on this thing would be in the negative numbers.
I'll say it again, y'all... quit wasting time and money on little stuff! Save up for a turbo kit! The only thing that comes close to matching it for power is nitrous, but the turbo can be used all the time. You'll also see a slight to moderate increase in fuel economy (once the honeymoon is over, of course). If you save up all the money spent on power-dribbles from straws, you could have the turbo kit and get the power from a 2-1/2-inch fire hose.
A wise man once said: "There's no excuse for a naturally aspirated diesel!"
I'll say it again, y'all... quit wasting time and money on little stuff! Save up for a turbo kit! The only thing that comes close to matching it for power is nitrous, but the turbo can be used all the time. You'll also see a slight to moderate increase in fuel economy (once the honeymoon is over, of course). If you save up all the money spent on power-dribbles from straws, you could have the turbo kit and get the power from a 2-1/2-inch fire hose.
A wise man once said: "There's no excuse for a naturally aspirated diesel!"
Laughing Gas
Joined: Aug 2003
Posts: 919
Likes: 4
From: Newberg Oregon
If you want a good cam send yours to Delta cams in tacoma washington, they did a profile on mine to make more torque, they told me the specs but I forget. It is a small difference but does have more power midrange than the other trucks I have driven. Also with roller lifters you need to be careful, if your originals are not ticking re use them they have needle bearings in the roller and some others dont, just a bushing. I dissassembled Mine and polished the deposits off of them and they work just fine.
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
Originally Posted by typefour
If you want a good cam send yours to Delta cams in tacoma washington, they did a profile on mine to make more torque, they told me the specs but I forget. It is a small difference but does have more power midrange than the other trucks I have driven. Also with roller lifters you need to be careful, if your originals are not ticking re use them they have needle bearings in the roller and some others dont, just a bushing. I dissassembled Mine and polished the deposits off of them and they work just fine.
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Laughing Gas
Joined: Aug 2003
Posts: 919
Likes: 4
From: Newberg Oregon
http://www.deltacam.com/
about 90 clams I think plus shipping, but I was up there so I just picked it up. They do awesome work, If you want tell them Russ's repair in oregon sent you, that,d be me.
about 90 clams I think plus shipping, but I was up there so I just picked it up. They do awesome work, If you want tell them Russ's repair in oregon sent you, that,d be me.
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Thread Starter
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Elder User
Joined: Sep 2005
Posts: 641
Likes: 1
From: Delta B.C.
Hmmm good to know.... tacoma is not really that far away from me... I am in BC....
My lifters are making a bit of noise... I will probably check with IH and see if they can provide me with new ones
thanks for the input
Bob
My lifters are making a bit of noise... I will probably check with IH and see if they can provide me with new ones
thanks for the input
Bob
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
Originally Posted by typefour
http://www.deltacam.com/
about 90 clams I think plus shipping, but I was up there so I just picked it up. They do awesome work, If you want tell them Russ's repair in oregon sent you, that,d be me.
about 90 clams I think plus shipping, but I was up there so I just picked it up. They do awesome work, If you want tell them Russ's repair in oregon sent you, that,d be me.
