01 cobra heads -vs- 03 Mach 1 heads

[Lumpydogs]

Are the 03 Mach 1 heads that much better than the 01 cobra heads? :shrug:

Opportunity to switch to Mach 1 heads during rebuild, any real advantage?

All input appreciated .

 

[97desertCobra]

They flow a little better on the intake side and a bit better on the exhaust side. I'm sure some one will post the flow #'s for both for comparison.

 

[gmsux]

The 99/01 heads flow 225/145 @.500
The Mach/03/04 heads flow 233/[email protected]

The later heads are a good upgrade.

 

[realitygt]

everything bolts up the same though right? valve covers and intake?

 

[wma8706]

It's intersesting to me how the Mach heads flow a bit better along with a bump in compression yet are less agressive with the cams. It seems to me... Ford wanted to compromise more TQ vs peak HP in a na factory 4V engine!

 

[na svt]

everything bolts up the same though right? valve covers and intake?

It's a good upgrade if you are in that area already and yes, they will bolt up without any issues.

I have no idea why they even show flow numbers at .500" because you rarely see cams with more than .475" lift.

Cleaned up Mach heads, flat top pistons, advanced intake cams and LTs will get you in the 350 rwhp range.

 

[realitygt]

It's a good upgrade if you are in that area already and yes, they will bolt up without any issues.

I have no idea why they even show flow numbers at .500" because you rarely see cams with more than .475" lift.

Cleaned up Mach heads, flat top pistons, advanced intake cams and LTs will get you in the 350 rwhp range.

which stock cams would be better then? the 99/01 or the 03/04?


I'm in pretty much the same situation.. my stock head needs some repair done to it from a broken ringland, and I don't want to pay the $700 just to repair it.. so i'm thinking about upgrading to the newer c heads.

 

[Chris _Scott]

which stock cams would be better then? the 99/01 or the 03/04?

99/01 for sure, it has almost 20 degrees more duration than the 03/04 cams. 200 degrees compared to 184-186ish I believe.

If you can get your hands on a set of 96-98 cams, that would be even better [I have a set of them if you're interested], they have 204 degrees.

 

[na svt]

which stock cams would be better then? the 99/01 or the 03/04?

99/01 cams have 200 degrees dur (16 more deg than 03/04 cams). (6-98 intake cams have 204 degrees duration. Y

FR500 cams would be a good upgrade.

 

[na svt]

which stock cams would be better then? the 99/01 or the 03/04?

99/01 cams have 200 degrees dur (16 more deg than 03/04 cams). 96-98 intake cams have 204 degrees duration.
FR500 cams would be a good upgrade.

 

[Lumpydogs]

As always, good information, great website. :thumbsup:

Thanks Guys.

 

[luiSVT99]

99/01 for sure, it has almost 20 degrees more duration than the 03/04 cams. 200 degrees compared to 184-186ish I believe.

If you can get your hands on a set of 96-98 cams, that would be even better [I have a set of them if you're interested], they have 204 degrees.

pm price, interested

thanks

 

[Chris _Scott]

pm price, interested

thanks

PM'd

I just have no need for them anymore.

 

[97desertCobra]

which stock cams would be better then? the 99/01 or the 03/04?


I'm in pretty much the same situation.. my stock head needs some repair done to it from a broken ringland, and I don't want to pay the $700 just to repair it.. so i'm thinking about upgrading to the newer c heads.

At that price you can find a used set in the market section thats in decent shape. With a FR500 kit it would be a great upgrade.

 

[gmsux]

99/01 03/04
.350 211/140 211/158
.400 218/143 221/163
.450 222/145 229/166

 

[PSUCOBRA96]

whats the duration of the FR500's?

 

[na svt]

whats the duration of the FR500's?

212int / 204exh

 

[yellow01]

which stock cams would be better then? the 99/01 or the 03/04?


I'm in pretty much the same situation.. my stock head needs some repair done to it from a broken ringland, and I don't want to pay the $700 just to repair it.. so i'm thinking about upgrading to the newer c heads.

im also in the same situation. but what about 03/04 cobra cams?

 

[na svt]

im also in the same situation. but what about 03/04 cobra cams?

03/04 cams have 20 degrees less duration than the 96-98 cams and 16 degrees less than the 99/01 cams.

 

[01yellercobra]

which stock cams would be better then? the 99/01 or the 03/04?


I'm in pretty much the same situation.. my stock head needs some repair done to it from a broken ringland, and I don't want to pay the $700 just to repair it.. so i'm thinking about upgrading to the newer c heads.

FWIW, I found a set of complete 03 heads in the market section for $625 shipped.