So I am installing some cams on my 2000 mustang since I rebuilt the motor and had it open. I went with a set of Howard rattler cams because I love the sound but I do have questions for people who used them. When it says to raise the rpm to 2500 for 20 mins how would you do that? While it’s parked? Or anything? Is that bad for my motor since it’s gonna be fully rebuilt and it has to be on the first start up. It says I’m not aloud to let it idle but could someone help me on what they did when they installed them or do I just put them in and start it up I do not wanna mess them up my car has been down for 4 months and it’s about to be finished and I do not wanna have to open it up again because of that please help.
Advice and help please
- Thread starter Gilroy gonzales
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I am aware of that that is for why I ask how do people do it by just holding down the pedal or how? Also American muscle brother
Good God! American muscle is probably the WORST company to get parts from. Just reading the reviews....
Q: Is this for the pair or for one cylinder head?
A: This will include 1 Camshaft.
Q: Why does it say for (pair)? Is it a set or for each one?
A: These are sold as a pair.
Worst of all.....
Q: Is Bama able to write a tune for these?
A: Yes, Bama can write a tune for these.
Anyways, who told you to "raise rpms for 20 min?"
Q: Is this for the pair or for one cylinder head?
A: This will include 1 Camshaft.
Q: Why does it say for (pair)? Is it a set or for each one?
A: These are sold as a pair.
Worst of all.....
Q: Is Bama able to write a tune for these?
A: Yes, Bama can write a tune for these.
Anyways, who told you to "raise rpms for 20 min?"
OHHHHH I get it now. You bought flat-tappet cams as opposed to the more common/more efficient roller cams. Yes, most flat tappet cams usually require a "break-in".
Why did you opt for a tappet cam? Just for the sound? You could have achieved relatively the same sound but get the extra performance and efficiency as a hydraulic cam.
Here is a good video on what to do (ignore the distributor gear, valve spring, and rocker arm info)
Why did you opt for a tappet cam? Just for the sound? You could have achieved relatively the same sound but get the extra performance and efficiency as a hydraulic cam.
Here is a good video on what to do (ignore the distributor gear, valve spring, and rocker arm info)
So I would just need to have my foot on the gas for that long damn hopefully I don’t get a cramp
manicmechanic007
5 Year Member
Your flat tappet cams, that I did not know existed for a 4.6
You have different thickness shims to adjust the lash?
The 20 minutes of run time above 2000 rpm is simply to break in the new cam, and what would be lifters but followers in your case
Yes, it is hard to do, but do it if you can
You run the risk of ruining your new cams if you don't
Run it at 2000rpm, then at 2400 and back and forth until you are sore in the foot or have a real hot hand and neck
You have different thickness shims to adjust the lash?
The 20 minutes of run time above 2000 rpm is simply to break in the new cam, and what would be lifters but followers in your case
Yes, it is hard to do, but do it if you can
You run the risk of ruining your new cams if you don't
Run it at 2000rpm, then at 2400 and back and forth until you are sore in the foot or have a real hot hand and neck
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