Cam drivability without tune - Mustang Evolution

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Old 03-17-2015, 10:41 PM   #1
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Cam drivability without tune

So I got all my parts in my trunk lol finally gonna get the cams in this weekend.. I have the comp stage 3 cams.. The car no longer has a tune, so as far as this being my daily will I be hurting anything driving it with these cams and no tune? I will be getting a tune soon just gotta pay for the sctx4 and the tune so it may be a couple weeks..
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Old 03-17-2015, 11:21 PM   #2
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What mods are you running? I kinda want cams but I heard it takes a lot of replacements for cams to be good to the engine


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Old 03-17-2015, 11:25 PM   #3
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I've got a 73mm bbk throttle body/plenum, steeda cai, steeda underdrive pullies, full msd ignition, full exhaust but haven't got my headers on yet..
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Old 03-17-2015, 11:59 PM   #4
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Even if you don't degree them, you will be fine. Upgrade the valve springs. Stage 3 cams at high rpms with stock valve springs will cause valve float and possibly cracking the valve spring. Degreeing the cams will make you get the most out of them, a CUSTOM tune with a typical stage 3 cam will also help
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Old 03-18-2015, 12:35 AM   #5
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Already have the new beehive comp springs and retainers
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Old 03-18-2015, 12:37 AM   #6
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By degreeing them im assuming you mean the timing? Mechanic is gonna re key the factory cam gears
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Old 03-18-2015, 04:34 AM   #7
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Your car won't hold idle right until it's tuned. It will start and run fine but when you go to drive, it will want to stall out. I have the same cams but also did ported heads at the same time.
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Old 03-18-2015, 08:53 AM   #8
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Can I not adjust the throttle screw to help that stalling? Or just keep the clutch in and give it a little gas to keep her alive
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Old 03-18-2015, 11:05 AM   #9
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Quote:
Originally Posted by keeney35 View Post
Can I not adjust the throttle screw to help that stalling? Or just keep the clutch in and give it a little gas to keep her alive
yeah you can do that to get by. Idk about throttle screw though. THe ECU might not like starting with the throttle cracked open on a cold day, but idk. I don't make the rules, I just circumnavigate them.


You see, if you had a carburetor it would take about 10 seconds to tune the idle for the cam and it would be completely free.. maybe that's why they don't have them anymore!! Why would they want that when they can charge you hundreds of dollars to adjust **** on an EFI car??
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Old 03-18-2015, 11:22 AM   #10
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Riight??? I miss the old cars when it was all simple that's what I learned on.. But hopefully we can get to hold an idle, if not i will get her tuned in the next few weeks
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Old 03-18-2015, 11:34 AM   #11
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Yeah I bet it will idle fine. Just might have an off-idle stumble that you gotta blip the throttle for. But that's only for people who don't go wfo to start off like I do.
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Old 03-18-2015, 11:38 AM   #12
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Yeah I don't go wo everytime but I do quite frequently lol I'm hoping this idle is loud and proud with my alresdy loud idle with no cats lol
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Old 03-18-2015, 11:52 AM   #13
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Cam drivability without tune

Don't touch that throttle screw. It doesn't work like an old carb would. Messing with that is one of the biggest things that messes up a cars tune.
You're spending good money to put a big cam in the car. Along with the supporting mods. Go ahead and spend a little more money and get it tuned. Also if you're doing all this work go ahead and degree the cams. Might as well do it right and once and for all.


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Old 03-18-2015, 12:14 PM   #14
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Yeah with something like this, you're better off going all out the first time. Its harder to go back in and degree cams after the fact
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Old 03-18-2015, 03:05 PM   #15
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By degreeing the cams you mean what? I feel like I know but I wanna be sure
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Old 03-18-2015, 03:08 PM   #16
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Yeah in essence you are just deciding for yourself how to orient the cam
This video should get you started:
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Old 03-18-2015, 03:23 PM   #17
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When he referred to the cam sprocket I'm assuming that can also be known as cam gear... So if that's the case they will be degreed
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Old 03-18-2015, 03:27 PM   #18
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Quote:
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When he referred to the cam sprocket I'm assuming that can also be known as cam gear... So if that's the case they will be degreed

It definitely sounds that way to me
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Old 03-18-2015, 07:59 PM   #19
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Don't adjust the throttle screw just get a tune. When the car first gets started it will idle fine. Once you begin to press the gas and drive it will stumble and want to stall until its tuned. I'm getting mine tuned this Friday. Here is the same cams you have but with ported heads. Yours will sound similar but probly not as loud because my ported pi heads. I would not drive it much until it's tuned by a professional and defiantly don't get on it If you do drive it without a tune.
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