Melling MTC1 cam kit

[NEK5]

Searched as much as I could, but all I found out, was that this is the cam I want. My only question is, are the lifters that come with it hydraulic? It says I need valve springs with installed height of 1.72", Summit doesn`t list those

Can I change rockers too? Any recommendations?

 

[Chrisblazzer89]

Link?

 

[smalltruckbigcid]

The lifters are hydraulic. With an LSA of 107 its not computer compatible. This will work as a bolt on with stock springs and heads, but its going to have a rough idle. Not horrible but not smooth as silk. Hope this helps.
George

 

[NEK5]

LSA

I`ve read that it worked good with the stock chip, but would be better with a custom burnt chip?

I did as much searching as I could, and thats what I found

 

[smalltruckbigcid]

Lobe Separation Angle. Its simple the smaller the number the harsher the idle. The number is the degrees of camshaft rotation between the intake and exhaust lobe centerlines. This number is set by the cam grinder when grinding the cam. You can advance or retard the cam and alter valve timing but the LSA will stay the same no matter what. If you read the app details in the summit blurb it says not computer compatible.
George

 

[NEK5]

didn`t see it on summit though...let me check

edit: you`re right. My b. Got any recomendations for a good TBI friendly cam?

 

[NEK5]

Lobe Separation Angle. Its simple the smaller the number the harsher the idle. The number is the degrees of camshaft rotation between the intake and exhaust lobe centerlines. This number is set by the cam grinder when grinding the cam. You can advance or retard the cam and alter valve timing but the LSA will stay the same no matter what. If you read the app details in the summit blurb it says not computer compatible.
George

What would be an acceptible LSA for a cam to run fine on a stock computer/chip?

I did some reading, and am looking at the cams he suggests, and the one that looks like the one I would need to get, comp cam 12-304-4, has a LSA of 111 degress, comes up as non computer compatible on Summit

 

[kwissman]

For the cam to work with TBI MAP system you need to look at something in the 113+ LSA range. Most of the cam companies make specific computer compatible cams, but that should not be a limiting factor. Keep the 0.050 duration below 210 and the LSA at 113 to 115 and you should be OK. I would buy a Lunati Voo Doo or a Comp Xtreme series as these cams have much better profiles and will open the valve faster to get better cylinder filling. Call the cam companies to talk to them for a recommendation. You need to know your engine specs and intended usage and they should lead you in the right direction.

If you want the best recommendation call Harold Brookshire he works for a small cam company now that can custom make whatever you want. You will have to look his contact info up on Chevelles.net. He used to own Ultradyne and designed all the Voo Doo cams for Lunati. He is one of the most respected cam designers around.

 

[dyeager535]

Don't forget Crane. When I was looking for computer application cams, Crane had a better selection of dual pattern (if that's what you need/want) cams than comp or anyone else I could find.

That was a few years back, but make sure to do your homework, check them all out.

From every account I've heard, Brian at TBIchips.com is a wealth of information on these systems, to include cams, and you might give him a call/email, and see if he can recommend something even if it adds the cost of burning a chip. If you are talking a gain of 40HP from a cam/chip swap, and the total is $3-400 (I'm making up all those numbers) for a smooth running engine, it would be well worth it compared to a cam that costs you $150 or so. Especially if it isn't giving you the performance it's capable of (because of tune) OR limits your selection because you don't have the capability to burn your own chips.

I have no idea if he likes giving out "free" information, but I'm sure he can offer up some variations of what you want to do, (with added expense of course, he's a business) and if you don't want to spend the extra money so be it, but he's given you valid, informed options.

 

[Thunder]

Melling MTC 1 cam will work fine with TBI. Dont even need a custom chip but tbichips.com has a chip that works real good with that cam. It is a very common replacement cam for TBI.
MTC 1 is not really a performance cam. It is a basic RV cam that builds great torque, will give real good gas mileage with TBI, Has a very good idle.
You do need to replace the stock valve springs. They are weak and dont work well with bigger than stock lift cams. The stock springs will be Ok for low RPM but they will float at higher RPMs 4500+.

 

[NEK5]

Melling MTC 1 cam will work fine with TBI. Dont even need a custom chip but tbichips.com has a chip that works real good with that cam. It is a very common replacement cam for TBI.
MTC 1 is not really a performance cam. It is a basic RV cam that builds great torque, will give real good gas mileage with TBI, Has a very good idle.
You do need to replace the stock valve springs. They are weak and dont work well with bigger than stock lift cams. The stock springs will be Ok for low RPM but they will float at higher RPMs 4500+.

Can anyone else attest to this?

I just got a return email from Brian over at TBICHIPS.com, and he suggests that I use the Edlebrock 2102 cam and a set of 1.6 rockers. Says it will run on the stock chip, but I will need bump the base timing up about 4 degrees.

 

[Thunder]

I can attest to this. I built the engine for our our wood truck. 1991 K2500.Mild ported 193 (half ton) heads. Melling Mtc 1 cam. Rest stock, except an adjustable fuel pressure regulator, flowmaster Exhaust. stock chip
It runs great and pulls almost as good as a new 6.0
Yeah you can run a edelbrock cam and 1.6 rockers but you really aint running much bigger than stock. You will get almost the same results with the stock cam and 1.6 rockers. And +4 timing.
E mail brian back and ask if he has a chip for the melling cam.
Also you really need headers to help TBI flow better.

 

[NEK5]

I can attest to this. I built the engine for our our wood truck. 1991 K2500.Mild ported 193 (half ton) heads. Melling Mtc 1 cam. Rest stock, except an adjustable fuel pressure regulator, flowmaster Exhaust. stock chip
It runs great and pulls almost as good as a new 6.0
Yeah you can run a edelbrock cam and 1.6 rockers but you really aint running much bigger than stock. You will get almost the same results with the stock cam and 1.6 rockers. And +4 timing.
E mail brian back and ask if he has a chip for the melling cam.
Also you really need headers to help TBI flow better.

Well, I think that what I`ll do, is if I have to change cams, then I will go with the melling cam, and see if Brian has a chip for it...

Headers, yes, I`d like to get them. Might as well, the truck will be an 82', therefore emissions exempt Any suggestions for ones I can use with the stock y pipe, etc.? Maybe a nice set of shortys?