OEM cam specs?

[SergntMac]

Anyone have the OEM cam specs? My "big red book" gives me lift, but not duration. Anyone have a complete breakdown? Thanks in advance.

[SergntMac]

Please, please, one at a time! You're shouting over each other and I can't make out one word!

[Breadfan]

Believe these are for the 03/04 Mach 1, if we have the same cam's this should be it:

Ford factory OEM Cam Specs. Camshaft Lift: 392”/ 390” Duration at 50: 232”/236”

[RF Overlord]

Believe these are for the 03/04 Mach 1, if we have the same cam's this should be itI may be way off :rasta: , but I thought I read somewhere that we had the 5.4L truck motor cams, to beef up low-end torque...

[SergntMac]

I may be way off :rasta: , but I thought I read somewhere that we had the 5.4L truck motor cams, to beef up low-end torque... I've heard the same thing, it's prolly true, and I can look there for specs as well. However, wouldn't this be true on Mach I and Aviator too? Same engine, different intakes.

[Breadfan]

I've heard the same thing, it's prolly true, and I can look there for specs as well. However, wouldn't this be true on Mach I and Aviator too? Same engine, different intakes.

That's what lead me to look up the Mach 1 specs, I was under the impression the automatic Mach 1 was just about identical internally.

At anyrate, I'll poke around some more later...

[RoyLPita]

:popcorn::popcorn:

[SergntMac]

At anyrate, I'll poke around some more later... Thank you, sir, it's appreciated.

[juno]

Believe these are for the 03/04 Mach 1, if we have the same cam's this should be it:

Ford factory OEM Cam Specs. Camshaft Lift: 392”/ 390” Duration at 50: 232”/236”

That's all I can find.

Whacha doing Mac?

[Breadfan]

This is a more complex question than can easily be answered then.

I've not found any concrete info. I could spend more time tonight scouring the 'net and see if I find anything hidden away.

I searched the 'net more, and hit up MM.net and the Mach1 site. Nothing concrete. I've heard things ranging from they are the same to the Marauder using "truck cams" to them only having Navigator intake cams. I just don't know the answer at this point.

My best suggestion would be to see if Ford stocks the cam's seperate from the heads. If so, look up part numbers for Marauder cam's, and see if the Mach 1 cams match in part number.

If not, check Navigator cam's, and possibly 99-01 Cobra cam's.

I'm thinking if we could get all those part numbers we may find a match.

Looks like over the years of mod motors there have been a good number of grind changes from '93 onward, and that all depends on if you have things ranging from a Continental, Mark VIII, Navigator, Aviator, Cobra, Mach 1, or Marauder.

Unfortunately for us, we've got the one on the list that is shrouded in the most mystery.

I did see the Steve Babcock had mentioned something about possibly using a truck cam or atleast a different grind. If anyone here has a line of communication in that direction perhaps he would have the answers...

If you ask me, the Marauder was largely a "parts-bin" performance car, so I don't forsee it having a custom cam grind - in my eyes, it has to share cams with something that was already in production.

Now I'm hooked, I'll probably look more tonight, the time required to search more extends beyond lunch-break...

[SergntMac]

^^^What he said ^^^

I got involved in this when asked the same question, and by finding the same lack of answers. The Big Red Book lists a dozen specs for the cams, two dozen on the heads, valves and so on. The one missing is duration, and a friend who works at a flow shop asked me because he's setting up a set 4V heads, and couldn't fine it anywhere himself.

BRB says the exhaust cam is #6A273, and the intake cam is #6A271. Anyone who can touch base with an '03 Mach 1 shop manual could compare those numbers?

Royal, you done with the popcorn yet?

[Breadfan]

Tonight I'll register on the Mach1 forum and see if I can bounce those part #'s off them as well.

By the way, this is very good info to have. With many having valve ticks and smoke-on-startup you may consider a set of used mod heads. Although my smoke magically stopped (for now), I did browse around at different heads, just to get an idea of cost. Would be nice to know what you'd lose (or for that matter, gain) going away from Marauder-specific heads.

[merc]

Does this info help

Intake Camshaft RH-(YF3E 6A270 BB) {Mustang Cobra}
LH-(YF3E 6A271 BB) {Mustang Cobra}
Intake Opens @ 6 Deg BTDC
Intake Closes @ 70 Deg BTDC
Intake Opening: 2.54mm Lift @ 30 Deg ATDC
Intake Closing: 2.54mm Lift @ 30 Deg ABDC
Max. Lobe Lift = 5.54064 mm @ 120 Deg ATDC {10mm at Valve}

Exhaust Camshaft RH-(YF3E 6A272 BB)
LH-(YF3E 6A273 BB)
Exhaust Opens @ 54 Deg BBDC
Exhaust Closes @ 16 Deg ATDC
Valve Lift 2.54mm Lift @ 17 Deg BBDC for Exhaust Opening
Valve Lift 2.54mm Lift @ 23 Deg BTDC for Exhaust Closing
Max. Lobe Lift = 5.55152 mm @ 110 Deg BTDC {10mm at Valve}

Boss 290 Cams

Intake Camshaft RH-(8912 6A270 AA)
LH-(8912 6A271 AA)
Intake Opens @ 13.4 Deg BTDC
Intake Closes @ 65 Deg BTDC
Intake Opening: 2.54mm Lift @ 18.9 Deg ATDC
Intake Closing: 2.54mm Lift @ 30 Deg ABDC
Max. Lobe Lift = 7.18969 mm @ 113.8 Deg ATDC {13mm at Valve}

Exhaust Camshaft RH-(8912 6A272 AA)
LH-(8912 6A273 AA)
Exhaust Opens @ 59.7 Deg BBDC
Exhaust Closes @ 17.9 Deg ATDC
Valve Lift 2.54mm Lift @ 27 Deg BBDC for Exhaust Opening
Valve Lift 2.54mm Lift @ 17.1 Deg ABDC for Exhaust Closing
Max. Lobe Lift = 6.1187 mm @ 112.7 Deg BTDC {12mm at Valve}

[Breadfan]

Yep, that's good data. Looks like the middle part of the part# isn't always unique. So looks like there could then be variations of 6A273 and 6A271...

You're showing specs for the Mustang Cobra and Boss 290 - are those 99-01 Cobra or 03/04 Cobra? And I'm actually not very familiar with Boss 290...is that like the 5.0 cammer motor?

[merc]

And I'm actually not very familiar with Boss 290...is that like the 5.0 cammer motor?

The 290 motor is the one from down under. It's the Ford version of the GTO

http://www.fpv.com.au/index.asp?link_id=2.171

[SergntMac]

More 411...My parts dude at my local L/M says the Big Red Book numbers are dead now, but they were a start (my book was printed before production started) Here's what's current in official part numbers at the parts counter.

Driver's intake...YL7Z-6250-BA
Driver's exhaust...YF3Z-6250-DA
Passenger Intake...YL7Z-6250-AA
Passenger Exhaust...YF3Z-6250-AA

He also added that he thinks the cams are not available as seperate items, he thinks.

Because the cam girdles do not have bearings, cams wear into the girdles directly, and you cannot just replace a cam. The replacement will wobble and fail early because the girdle has been worn. The guy at the flow shop says they work around this by reboring for a new cam. Okay.

The girdles are not available seperately, this I know from stripping out a valve cover bolt. Moreover, if there is no bearing, the bottom of the cam girdle (the head itself) also wears, and he thinks a repair is a pre-assembled head. At least, this is what they do at my local L/M dealer.

What the Hell have I gotten into?

[Breadfan]

What the Hell have I gotten into?

Heh! It's gotta end somewhere....RIGHT?????

Well then, if it's heads required to replace a cam, maybe we could check HEAD part numbers too??

Too much more and I'll be searching "Babcock, Steve" on Switchboard...

[SergntMac]

Thanks, Merc, interesting stuff. I got likewise from my Helms book, but what's missing, is duration, the time the valve is open.

I'll give this 411 to the guy at the flow shop, maybe he can calculate that from your numbers?

[Black Terror]

More 411...My parts dude at my local L/M says the Big Red Book numbers are dead now, but they were a start (my book was printed before production started) Here's what's current in official part numbers at the parts counter.

Driver's intake...YL7Z-6250-BA
Driver's exhaust...YF3Z-6250-DA
Passenger Intake...YL7Z-6250-AA
Passenger Exhaust...YF3Z-6250-AA

He also added that he thinks the cams are not available as seperate items, he thinks.

Because the cam girdles do not have bearings, cams wear into the girdles directly, and you cannot just replace a cam. The replacement will wobble and fail early because the girdle has been worn. The guy at the flow shop says they work around this by reboring for a new cam. Okay.

The girdles are not available seperately, this I know from stripping out a valve cover bolt. Moreover, if there is no bearing, the bottom of the cam girdle (the head itself) also wears, and he thinks a repair is a pre-assembled head. At least, this is what they do at my local L/M dealer.

What the Hell have I gotten into?

From Mach 1 website:
Quote:
Originally posted by ITLRUN
HELLO!!!!

03 Cobra, 03 Mach 1, and 03 Maurader all have the same heads and camshafts, Period.

The part numbers for each are the same.

2C5Z-6049-DALH
2C5Z-6050-DARH

The camshafts may have been sourced from other vehicles (Navigator) but all three cars share the same part.

The internet is full of information; however not all of it is good....:lol




The information from Ford is that these are the part numbers for the cams, and yes, they do state that the cams are the same for the Mach1 as well as the Cobra:

Intake:
LH: YL7Z6250BA
RH: YL7Z6250AA

For the Exhaust:
LH: YF3Z6250DA
RH: YF3Z6250AA

Seems like there is some wrong info being leaked out by Ford itself. I have press clearance on the Ford Media site, where journalists go to get "official" press releases from Ford. The info about the Mach having "mach 1 specific cams" is indeed listed there. So the magazines are writing stories based on info that they are getting from Ford.

[SergntMac]

Very cool, Bill/Black Terror, thank you! Exact same numbers I got from my L/M guy. At least we have learned this much.

Back to cam specs...Duration?

Maybe I'm looking for a spec that's not important anymore?

[Black Terror]

Very cool, Bill/Black Terror, thank you! Exact same numbers I got from my L/M guy. At least we have learned this much.

Back to cam specs...Duration?

Maybe I'm looking for a spec that's not important anymore?

I couldn't find duration, anywhere that I looked.