Help Choosing A Camshaft!!!
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Senior User
Joined: Jun 2015
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Help Choosing A Camshaft!!!
Hey fellow Ford owners out there! I was hoping ya'll could help me out by telling me which camshaft kit below is best for my application. I have a 1976 Ford 7.5 Liter 460 V8. All of the links below take you to the Summit Racing website and every camshaft there is a Comp Cams brand. I have chosen a cam from the Magnum, High Energy and Thumpr categories. I need a cam that will work with all factory timing and parts except for aftermarket Keith Black Hypereutectic Pistons and a Dacco Performance Plus 2300-2800 Stall Torque Convertor. Also, along with aftermarket exhaust and intake and such. I also need a cam that will increase more low-end power than anything. Please help guys! If ya'll could direct Paul Cane, or Scott to this thread thank you! Here are the camshaft kits I want to choose from:
#1: COMP Cams Magnum Hydraulic Cam and Lifter Kits K34-331-4 - Free Shipping on Orders Over $99 at Summit Racing
#2: http://www.summitracing.com/parts/cca-k34-600-5/overview/make/ford
#3: COMP Cams Magnum Hydraulic Cam and Lifter Kits K34-229-4 - Free Shipping on Orders Over $99 at Summit Racing
#4: COMP Cams High Energy Cam and Lifter Kits K34-227-4 - Free Shipping on Orders Over $99 at Summit Racing
#5: http://www.summitracing.com/parts/cca-k34-238-4/overview/make/ford
#1: COMP Cams Magnum Hydraulic Cam and Lifter Kits K34-331-4 - Free Shipping on Orders Over $99 at Summit Racing
#2: http://www.summitracing.com/parts/cca-k34-600-5/overview/make/ford
#3: COMP Cams Magnum Hydraulic Cam and Lifter Kits K34-229-4 - Free Shipping on Orders Over $99 at Summit Racing
#4: COMP Cams High Energy Cam and Lifter Kits K34-227-4 - Free Shipping on Orders Over $99 at Summit Racing
#5: http://www.summitracing.com/parts/cca-k34-238-4/overview/make/ford
FTE Legend
Joined: Nov 2015
Posts: 30,986
Likes: 4,137
From: Angier, NC
You say "increase more low end power then anything" but has to use a "2300-2800 stall TC".
If I remember right the 2 don't work together cams that work in the higher RPMs need to use higher stall TC's.
What is it you will do the most with the truck off roading, pulling heavy loads, or just driving on the streets empty?
What gearing and tire size
Header size long tube or short? Big tube is not good for low RPM power.
What intake and What is the RPM range of the intake?
Dave ----
If I remember right the 2 don't work together cams that work in the higher RPMs need to use higher stall TC's.
What is it you will do the most with the truck off roading, pulling heavy loads, or just driving on the streets empty?
What gearing and tire size
Header size long tube or short? Big tube is not good for low RPM power.
What intake and What is the RPM range of the intake?
Dave ----
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Hey fellow Ford owners out there!
I need a cam that will work with all factory timing and parts except for aftermarket Keith Black Hypereutectic Pistons and a Pormance Plus 2300-2800 Stall Torque Convertor.
I also need a cam that will increase more low-end power than anything. Please help guys!:
I need a cam that will work with all factory timing and parts except for aftermarket Keith Black Hypereutectic Pistons and a Pormance Plus 2300-2800 Stall Torque Convertor.
I also need a cam that will increase more low-end power than anything. Please help guys!:
You are not listening.
What "factory timing"? (Cam timing? Ignition timing? Something else???)
Learn how to degree a cam and what advancing or retarding it will do to compression and torque.
Read up on ignition curves and how emissions conflicts with making power. And how EGR can actually help with driveability if you have a performance curve.
A 2800 stall converter with a "low-end power" cam???
Do you understand the relationship between torque and horsepower?
Do you understand that there is only so much energy *available* in a given volume of F/A charge?
This is why you need displacement or rpms (or both)
DJ has a whole list of proven combos over at that other site.
Components need to complement one another.
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Joined: Nov 2007
Posts: 22,415
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From: Denver Metro Area, CO
I think BigBlocker is trying to do what I was hoping I could do with my 400 - getting various parts and doing various work but never really knowing much about what I was doing.
Glad I didn't do that - as I learned, building an engine is something of an art and people go to specialized schools to learn this stuff.
Glad I didn't do that - as I learned, building an engine is something of an art and people go to specialized schools to learn this stuff.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Which is why I've suggested ( in both this, and his other thread) he educate himself by playing with desktop dyno and the calculators available on cam manufacturers websites.
Reading up about how ignition timing and curves affect performance and emissions.
Then you might not try to pair an RPM air gap intake and an open spacer with stock heads and a 600cfm carb.
Or install flat tops and milled heads together with a lazy cam and attempt to use pump gas.
Trade or sell the pieces that won't work and assemble the engine once.
Rather than pulling it apart (or having it blow itself apart) to make it run right.
Reading up about how ignition timing and curves affect performance and emissions.
Then you might not try to pair an RPM air gap intake and an open spacer with stock heads and a 600cfm carb.
Or install flat tops and milled heads together with a lazy cam and attempt to use pump gas.
Trade or sell the pieces that won't work and assemble the engine once.
Rather than pulling it apart (or having it blow itself apart) to make it run right.
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Senior User
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Alright guys I've started over. Yes this true, I am not extremely mechanically inclined in building a powerful motor that's why I've asked for you all's help. I just bought a Ford 7.5 Liter 460 V8 that came out of a Ford truck. It is a used motor, completely stock. I haven't quite looked up the year yet. So guys in attention I want a powerful low-end and mid range truck. I don't want to tach over 5,800-6,000 RPMs. I also don't plan on hitting 140 miles per hour either. It will be a daily driver that I plan on running 93 Octane Premium gasoline in. The only reason I bought the Dacco Performance Plus 2,300-2,800 Stall Torque Convertor is because some camshafts I have looked at required an aftermarket one. The truck will have a factory rebuilt 3-Speed C6 Automatic Transmission with a Transgo Performance Shift Kit. The truck also has a 3.00 Rear End Gearing Ratio. So now having this motor, how should I build it. What kind of intake, machine work, pistons, etc. should I use. I have sold the 460 that came out of the Lincoln. So guys, now starting fresh, what should I do? Ya'll have been so helpful. I really appreciate the patience. Is there anyway to get what I want out of the torque convertor I got?
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FTE Legend
Joined: Nov 2015
Posts: 30,986
Likes: 4,137
From: Angier, NC
When looking at parts like cam & intake look at the RPM range they work in so you know they "should" play nice together.
On cams it is best to talk to a live person that knows cam shafts.
Do you have a machine shop you are going to use? If so talk to them what you want for a motor and they can guide you better than we could. They may want to measure the motor to get a better look at what is needed.
Also you are looking at all the parts and it could be for nothing as the shop may want to buy the parts so they know they will work together and get to them on time so they are not sitting waiting for parts.
I am no expert but I would not have a compression over 10:1 maybe more like 9.5:1 to run the crappy gas we can get with out burning holes in pistons. A machine shop can tell you what ones are needed after measuring the motor to get the compression you want.
I was going to say small tube headers but I remember the tennis ball size ports the heads have so I don't know a good size to go with maybe 1-7/8"?
Dave ----
On cams it is best to talk to a live person that knows cam shafts.
Do you have a machine shop you are going to use? If so talk to them what you want for a motor and they can guide you better than we could. They may want to measure the motor to get a better look at what is needed.
Also you are looking at all the parts and it could be for nothing as the shop may want to buy the parts so they know they will work together and get to them on time so they are not sitting waiting for parts.
I am no expert but I would not have a compression over 10:1 maybe more like 9.5:1 to run the crappy gas we can get with out burning holes in pistons. A machine shop can tell you what ones are needed after measuring the motor to get the compression you want.
I was going to say small tube headers but I remember the tennis ball size ports the heads have so I don't know a good size to go with maybe 1-7/8"?
Dave ----
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