B303 Cam

acmillr · November 7th, 2007, 12:51 PM

I recently acquired a 92 fox with a 306. The guy that sold me the car says it has a B303 cam. I looked up the specs for the cam and I am a little confused. Does this cam have 107 degrees of lobe seperation?- WTF?

After looking at the specs, I don't really understand what this cam is designed for. It has a real choppy idle (which sounds great), but the powerband in this car is weird. It's like the car doesn't come into it's powerband until mid range, but it doesn't seem to have much top end. Is this cam possibly to blame for the strange powerband? It has E7 heads with 1.7 rockers BTW.

acmillr · November 7th, 2007, 01:08 PM

I wrote the wrong thing down in the first post. The motor has 1.6 ratio rocker arms.

Darrell · November 7th, 2007, 01:11 PM

The B303 cam has a 112 lobe separation. The narrow powerband is the cam. The B303 is known for it.

acmillr · November 7th, 2007, 01:17 PM

Darrell, what cam would be good swap for this motor? I like the choppy idle, but I would enjoy some performance from it as well. Will a comp 286 work in this motor without PTV issues?

Tony_90fox · November 7th, 2007, 01:24 PM

Changing the cam would be pointless. In fact, it is just about pointless to have a B303 in there now...Obviously the guy did it for the sound ONLY... Get a nice set of heads and intake before you go swapping the cam AGAIN.

acmillr · November 7th, 2007, 01:28 PM

OK, help me out here- I have never been a Ford guy. My 03 was the first Mustang I have ever really been into, and it is nothing like the SBF. Everything I have built in the past was Chevrolet. I forgot to mention that the car has a holley 750 and an Edelbrock dual plane intake. Maybe I should just go back to proven methods- A built 355.

acmillr · November 7th, 2007, 01:33 PM

Here's the car BTW:

Originally Posted by 92rumblefox

1992 LX Hatch, 100k+ chassis miles
1993 302 block (306ci), 11k+ miles on rebuild
FRPP Forged pistons
Cast crank
I-beam rods
E7 heads
SVO B351 1.6 rockers
Edelbrock Performer RPM/302 manifold
Holley 4160C 750cfm carb (vac. secondaries)
Mallory Dual Point dist.
MSD 8.5mm SuperCon wires
MSD 6A controller
Flowtech tuned headers, 3" collectors
Dual Flowmaster 40 series, no crossover pipe
BW T5
Hurst shifter
FRPP King cobra clutch
Steeda billet clutch quadrant
Billet firewall adjuster
FRPP Alum. Driveshaft
FRPP 3.73 gears
Brand new Perfection (sub division of Zoom) flywheel

Grant GT steering wheel
No interior, partial dash (fiberglassing work in progress :thumbsup: )
Two original seats
Battery located in hatch, sealed/vented box
Optima 720cca with an external cutoff switch on the right rear
Dual Imperial electric fans
Electric fuel pump
3rd gen 130A alternator conversion

Summit Star wheels (weld pro star knockoffs)
Mickey thompson Sportsman S/Rs in the rear
Moroso DS2's in the front w/ no tread

Old motor shot, just after the carb. conversion

Tony_90fox · November 7th, 2007, 01:33 PM

Nah, a 306 is nice man...Just get a good top, in your case, just heads/cam, some nice pushrods. seems like you have a decent carb (i dont know much about carbs though)

I was just saying, that cam with a stock motor is just worthless...It is used for sound only and no performance in your case. Get a pair of nice heads and a better cam and you got yourself a nice motor...

And i am not dogging the B303, that is what i am running, but with ported GT40 heads, ported explorer intake, etc etc...

JBIGBOOTSY · November 7th, 2007, 06:19 PM

I'd put some heads on before I put lexan in. IMO.

JBIGBOOTSY · November 7th, 2007, 06:20 PM

You don't have a chute on that thing do ya?

acmillr · November 8th, 2007, 07:07 AM

I just got it. I didn't do all the "upgrades". No, I don't have a chute.

ryans88gt · November 8th, 2007, 04:53 PM

That carb is pretty big for a 302, you need more like a 600 or 650 for a 302 if you want good off idle power.

Put a set of aluminum heads on there and you will notice a huge difference.

a 355 is a proven turd, not a performance solution. The only thing good about it is that it is dirt cheap, so when it breaks you can replace it cheap. A ford 351w will hold about 800 hp with a stock crank block and pistons (rod upgrade only)

Speedstang302 · November 8th, 2007, 05:59 PM

Originally Posted by ryans88gt

That carb is pretty big for a 302, you need more like a 600 or 650 for a 302 if you want good off idle power.

Put a set of aluminum heads on there and you will notice a huge difference.

a 355 is a proven turd, not a performance solution. The only thing good about it is that it is dirt cheap, so when it breaks you can replace it cheap. A ford 351w will hold about 800 hp with a stock crank block and pistons (rod upgrade only)

+1 that would run alot better w/ a holley 650 or demon 650..a custom cam and a nice set of aluminum heads, those heads are doing that thing no justice..and plan on replacing those shitty flowtech headers soon..they suck...

acmillr · November 8th, 2007, 07:11 PM

Originally Posted by ryans88gt

That carb is pretty big for a 302, you need more like a 600 or 650 for a 302 if you want good off idle power.

Put a set of aluminum heads on there and you will notice a huge difference.

a 355 is a proven turd, not a performance solution. The only thing good about it is that it is dirt cheap, so when it breaks you can replace it cheap. A ford 351w will hold about 800 hp with a stock crank block and pistons (rod upgrade only)

What the hell are you spewing out of your keyboard? The last 355 I built cost me about $2500 and went a 6.93 1/8 in a 3000 lb. Camaro. Don't go thinkin that the Ford motor is the king just because you have one.

JBIGBOOTSY · November 8th, 2007, 07:37 PM

Originally Posted by acmillr

What the hell are you spewing out of your keyboard? The last 355 I built cost me about $2500 and went a 6.93 1/8 in a 3000 lb. Camaro. Don't go thinkin that the Ford motor is the king just because you have one.

I'd have just stuck with that then. Most the guys on here have tried other cars, and makes. Dont think that your 355 is the king cause you got E7's and a 750. A bad combo is a bad combo, 355, 302 or whatever. You need wheelie bars.

acmillr · November 8th, 2007, 07:50 PM

Let me say again- I traded for the car as is- I have $800 in this car. If I didn't like the Mustang, I wouldn't have it, but I would like to be some what cost efficient with this car. I have gotten use to spending rediculous amounts of money on the mod motors for less than stellar performance.

Anyway, does anybody know where I could find a tubular K-member that is already set up to accept a small chevy motor?

sloppyjosey · November 8th, 2007, 08:13 PM

you don't need a custom K-member, just mounts. and a good head examining.

acmillr · November 8th, 2007, 08:30 PM

I'm just thinking right now.

sloppyjosey · November 8th, 2007, 08:33 PM

i know youll make the right choice

Darrell · November 8th, 2007, 08:35 PM

For you Chevy haters, this car has a 355 and runs 8.0s

November 7th, 2007, 12:51 PM	#1
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	B303 Cam I recently acquired a 92 fox with a 306. The guy that sold me the car says it has a B303 cam. I looked up the specs for the cam and I am a little confused. Does this cam have 107 degrees of lobe seperation?- WTF? After looking at the specs, I don't really understand what this cam is designed for. It has a real choppy idle (which sounds great), but the powerband in this car is weird. It's like the car doesn't come into it's powerband until mid range, but it doesn't seem to have much top end. Is this cam possibly to blame for the strange powerband? It has E7 heads with 1.7 rockers BTW. __________________

November 7th, 2007, 01:08 PM	#2
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	I wrote the wrong thing down in the first post. The motor has 1.6 ratio rocker arms. __________________

November 7th, 2007, 01:11 PM	#3
Darrell Feb 08 ROTM 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,026	The B303 cam has a 112 lobe separation. The narrow powerband is the cam. The B303 is known for it. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

November 7th, 2007, 01:17 PM	#4
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	Darrell, what cam would be good swap for this motor? I like the choppy idle, but I would enjoy some performance from it as well. Will a comp 286 work in this motor without PTV issues? __________________

November 7th, 2007, 01:24 PM	#5
Tony_90fox MM Fanatic Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,593	Changing the cam would be pointless. In fact, it is just about pointless to have a B303 in there now...Obviously the guy did it for the sound ONLY... Get a nice set of heads and intake before you go swapping the cam AGAIN. __________________ 393 dropping in a foxbody near you, very very soon Military Crew E-3 Combat Engineer

November 7th, 2007, 01:28 PM	#6
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	OK, help me out here- I have never been a Ford guy. My 03 was the first Mustang I have ever really been into, and it is nothing like the SBF. Everything I have built in the past was Chevrolet. I forgot to mention that the car has a holley 750 and an Edelbrock dual plane intake. Maybe I should just go back to proven methods- A built 355. __________________

November 7th, 2007, 01:33 PM	#8
Tony_90fox MM Fanatic Join Date: Jun 2006 Location: Bowling Green, KY Posts: 3,593	Nah, a 306 is nice man...Just get a good top, in your case, just heads/cam, some nice pushrods. seems like you have a decent carb (i dont know much about carbs though) I was just saying, that cam with a stock motor is just worthless...It is used for sound only and no performance in your case. Get a pair of nice heads and a better cam and you got yourself a nice motor... And i am not dogging the B303, that is what i am running, but with ported GT40 heads, ported explorer intake, etc etc... __________________ 393 dropping in a foxbody near you, very very soon Military Crew E-3 Combat Engineer

November 7th, 2007, 06:19 PM	#9
JBIGBOOTSY Hardcore Enthusiast 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 1,922	I'd put some heads on before I put lexan in. IMO. __________________ Originally Posted by HELLRAZR94 what up pussy lets stop talking shit i would love for your pussy ass to come to cali so that i can show you what im about, when you get here let me know and i will come to you fag

November 7th, 2007, 06:20 PM	#10
JBIGBOOTSY Hardcore Enthusiast 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 1,922	You don't have a chute on that thing do ya? __________________ Originally Posted by HELLRAZR94 what up pussy lets stop talking shit i would love for your pussy ass to come to cali so that i can show you what im about, when you get here let me know and i will come to you fag

November 8th, 2007, 07:07 AM	#11
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	I just got it. I didn't do all the "upgrades". No, I don't have a chute. __________________

November 8th, 2007, 04:53 PM	#12
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 3,554	That carb is pretty big for a 302, you need more like a 600 or 650 for a 302 if you want good off idle power. Put a set of aluminum heads on there and you will notice a huge difference. a 355 is a proven turd, not a performance solution. The only thing good about it is that it is dirt cheap, so when it breaks you can replace it cheap. A ford 351w will hold about 800 hp with a stock crank block and pistons (rod upgrade only)

November 8th, 2007, 07:50 PM	#16
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	Let me say again- I traded for the car as is- I have $800 in this car. If I didn't like the Mustang, I wouldn't have it, but I would like to be some what cost efficient with this car. I have gotten use to spending rediculous amounts of money on the mod motors for less than stellar performance. Anyway, does anybody know where I could find a tubular K-member that is already set up to accept a small chevy motor? __________________

November 8th, 2007, 08:13 PM	#17
sloppyjosey Regular Join Date: Jun 2007 Location: indiana Posts: 80	you don't need a custom K-member, just mounts. and a good head examining. __________________ "supernatural aspiration"

November 8th, 2007, 08:30 PM	#18
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	I'm just thinking right now. __________________

November 8th, 2007, 08:33 PM	#19
sloppyjosey Regular Join Date: Jun 2007 Location: indiana Posts: 80	i know youll make the right choice __________________ "supernatural aspiration"

Threads Similar to: B303 Cam
Thread	Thread Starter	Forum	Replies	Last Post
B303 or E303??	92mustanglx	5.0 Mustangs	13	May 29th, 2007 06:38 PM
B303 cam	homebrewed	5.0 Mustangs	21	March 9th, 2007 12:07 AM
b303 cam with 1.72rr's	bigbadtalontsi	5.0 Mustangs	5	January 16th, 2007 06:36 PM

All times are GMT -4. The time now is 01:32 AM.
Contact Us - Modded Mustangs - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2008, Jelsoft Ent. Ltd. & SEO by vBSEO 3.1.0 ©2007, Crawlability, Inc.

November 8th, 2007, 08:35 PM	#20
Darrell Feb 08 ROTM 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,026	For you Chevy haters, this car has a 355 and runs 8.0s __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft