Z303 Cam and Z heads

95mustanggt · 11-04-2006, 01:30 PM

Anyone have any comments on Z303 cam? How does this cam idle?

Anyone have any comments on the Z heads?

I'm considering the 390 HP Long Block from Ford Racing.

Coupe50h · 11-04-2006, 01:59 PM

I knew a guy that had the z-cam, It had the sickest lope on the idle.
he said the cam would start making power around 3k+,
IMO, a 302 with with a z cam would need like 4.30 gears to even feel streetable on the lowend. Id suggest only using this in a 347+ cube with the right pistons, not my experience personally though, just from what I've researched. who knows? some guys might use them on 302's all the time.

95mustanggt · 11-04-2006, 03:04 PM

Here's the long block that I was looking at using. My stang is a 3rd vehicle, so it's really a sunday driver. But I don't want to be stalling at idle because the cam is too rough. My other option is the E303 cam.

Dark_5.0 · 11-04-2006, 08:07 PM

I ran the E303 cam for a while and it made good power but idled like crap for the most part.

E303 Dyno

The custom cam I have now has .566 lift and idles great. I havent dyno'd with it yet but it does make more power cause I trap 2 mph more than with the E cam.

If it were me I would go with the big Z cam or a custom cam the E cam is a pain in the @ss with all the idle and vacuum issues it has.

Just make sure you get an intake manifold that matches the powerband of the cam you choose and you will be all good.

95mustanggt · 11-04-2006, 09:57 PM

Quote:

Originally Posted by Dark_5.0

I ran the E303 cam for a while and it made good power but idled like crap for the most part.

E303 Dyno

The custom cam I have now has .566 lift and idles great. I havent dyno'd with it yet but it does make more power cause I trap 2 mph more than with the E cam.

If it were me I would go with the big Z cam or a custom cam the E cam is a pain in the @ss with all the idle and vacuum issues it has.

Just make sure you get an intake manifold that matches the powerband of the cam you choose and you will be all good.

I was thinking of the TFS intake. My only concern with the Z303 cam was a really poor idle. But if the E303 has problems, then the Z303 it is.

Although since I've been looking I've noticed ads on the boss 302 crate engines, and I wonder what they will be like...

Hammer · 11-04-2006, 10:28 PM

Cam,
I've heard good things about the TFS intake, and in all honesty I would be calling Comp Cams or Crane about what you would need on a cam as considering what you are looking for, a custom cam may be just what the doctor ordered. Once you have a good idea what your setup is going to be, I'm sure that they can come up with a good solution for you that makes good power while maintaining a sense of streetability....

When I had the 306 worked over, we found out that the cam in the Kaufmann was a custom job. Considering the good power and streetable manners, I can't complain...

95mustanggt · 11-05-2006, 01:30 AM

Quote:

Originally Posted by Hammer

Cam,
I've heard good things about the TFS intake, and in all honesty I would be calling Comp Cams or Crane about what you would need on a cam as considering what you are looking for, a custom cam may be just what the doctor ordered. Once you have a good idea what your setup is going to be, I'm sure that they can come up with a good solution for you that makes good power while maintaining a sense of streetability....

When I had the 306 worked over, we found out that the cam in the Kaufmann was a custom job. Considering the good power and streetable manners, I can't complain...

I hear you. But this crate engine comes with either a Z303 or a E303 cam. By the time I buy everything, I don't know if I want to replace the cam.

Coupe50h · 11-05-2006, 08:25 PM

I like the e-cam, idles great for me, just had to work out some bugs, idles clean, I like to go through a drive through without killing everyone in the parking lot with exhaust fumes, the e-cam is 50 state smog legal

lugthug713 · 11-05-2006, 08:41 PM

Quote:

Originally Posted by 95mustanggt

Here's the long block that I was looking at using. My stang is a 3rd vehicle, so it's really a sunday driver. But I don't want to be stalling at idle because the cam is too rough. My other option is the E303 cam.

Man where is that engine for sale???

95mustanggt · 11-06-2006, 08:51 AM

Quote:

Originally Posted by lugthug713

Man where is that engine for sale???

It's a Ford Racing Crate Engine.

11-04-2006, 01:30 PM	#1
95mustanggt Registered Member Join Date: May 2000 Location: Kamloops, BC Posts: 2,875	Z303 Cam and Z heads Anyone have any comments on Z303 cam? How does this cam idle? Anyone have any comments on the Z heads? I'm considering the 390 HP Long Block from Ford Racing. __________________ 1995 Mustang GT 20016 F150 Lariat Super Crew

11-04-2006, 01:59 PM	#2
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: Z303 Cam and Z heads I knew a guy that had the z-cam, It had the sickest lope on the idle. he said the cam would start making power around 3k+, IMO, a 302 with with a z cam would need like 4.30 gears to even feel streetable on the lowend. Id suggest only using this in a 347+ cube with the right pistons, not my experience personally though, just from what I've researched. who knows? some guys might use them on 302's all the time. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

11-04-2006, 08:07 PM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: Z303 Cam and Z heads I ran the E303 cam for a while and it made good power but idled like crap for the most part. E303 Dyno The custom cam I have now has .566 lift and idles great. I havent dyno'd with it yet but it does make more power cause I trap 2 mph more than with the E cam. If it were me I would go with the big Z cam or a custom cam the E cam is a pain in the @ss with all the idle and vacuum issues it has. Just make sure you get an intake manifold that matches the powerband of the cam you choose and you will be all good. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

11-04-2006, 10:28 PM	#6
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	Re: Z303 Cam and Z heads Cam, I've heard good things about the TFS intake, and in all honesty I would be calling Comp Cams or Crane about what you would need on a cam as considering what you are looking for, a custom cam may be just what the doctor ordered. Once you have a good idea what your setup is going to be, I'm sure that they can come up with a good solution for you that makes good power while maintaining a sense of streetability.... When I had the 306 worked over, we found out that the cam in the Kaufmann was a custom job. Considering the good power and streetable manners, I can't complain... __________________ Uncle Sam "What the hell is up with all the gauges? Calling Captain Kirk, your ride awaits... Phasers on stun...."

11-05-2006, 08:25 PM	#8
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: Z303 Cam and Z heads I like the e-cam, idles great for me, just had to work out some bugs, idles clean, I like to go through a drive through without killing everyone in the parking lot with exhaust fumes, the e-cam is 50 state smog legal __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear