do you have to notch the pistons with AFR heads and B303 cam?

[475HP '03 cobra]

well the title explains it....
B303cam and
165 street legal AFR head

will i have to notch the pistons or will the valves clear em?

i heard that the AFR takes about 220 degree duration at .050 but it was from a not-so-sure source

however the B303 has a 224 degree duration at .050 so i was wonderin if any of ya'll have done this and if you had problems?

[475HP '03 cobra]

by the way, i would like to put adjustable 1.7 rockers on too and i've heard they can make a difference in valve clearence, any suggestions?

[Wall96cobra]

You'll be fine with the 165's and b-cam (assuming you have stock pistons/compression) , it's usually only when you have a trickflow head or some other head with a 2.02 valve that it gets close. QWKSNKE actually ran that same combo for alittle while B-cam, 165's and 1.7 rockers, the 1.7 will give you about .030 more lift than running a 1.6 rocker so instead of a .480 lift it will be about .510 lift.

[475HP '03 cobra]

you completely sure about that or do suggest a valve to piston check too?

also what about the 185cc's will they work?, do you suggest them?, and how much more power will i get?

[QWKSNKE]

yes it will work. Like Wall mentioned I ran that combo for quite some time with good success.

The reason you have to check clearance with the trickflows is because they are not a inline valve head. Their valves are rotated enough where they are out of the OEM piston valve reliefs. Max recommended lift with trickflows and OEM pistons is .525

FYI... I ran .544 lift cam with AFR's and OEM pistons.

[QWKSNKE]

however the B303 has a 224 degree duration at .050 so i was wonderin if any of ya'll have done this and if you had problems?

Thought about this statement a little more but first......My above post is referencing 87-up 5.0 cars only. You did not elaborate on what car was in question or whther it has stock bottom end or whatever. I do not recommend this on the 86's because the OEM pistons do not have valve reliefs.

Now about the heads and duration. The heads do not car about duration. they are not rated with duration in mind. Only lift is considered and that is for your valve spring capabilities

[Wall96cobra]

Now about the heads and duration. The heads do not car about duration. they are not rated with duration in mind. Only lift is considered and that is for your valve spring capabilities




Well duration does matter since the more duration you have the longer the valve will stay open so you chances of piston to valve contact would be greater with a high duration cam but the b-cam isn't that agressive so you wouldn't have to worry about it as long as it's a 87-95 stock 302 like you said.

(475HP '03 cobra) If you're that worried about it though just do a piston to valve check to make sure, I can understand you being paranoid about it I mean these parts aren't cheap so you never can be too careful but like I said Lee did run that same setup on his 93 cobra with the stock shortblock.

[475HP '03 cobra]

yeah thank for the information guys it helped alot by the way its a 1992 GT so i dont suppose i will have any problems

just wondering...how much will a .510 lift vs. a .544 lift differ in power?...just wondering...i probably wont change my plans unless its very significant..but i just had it in the back of my mind

[Italian LX]

It's hard to guess an increase in power purely based on valve lift. There are so many other factors including duration, heads, intake, etc.

[Shankin]

That cam will clear just fine. I have ran 202s on a f cam with no problem also. I would go with a f cam before a b cam.

[475HP '03 cobra]

any particular reason why?

i mainly like the B cam becuase its real rough and i wouldnt mind sacrificing a little power before giving up that roughness

also i want to have low end torque and the B has more than the F (i know that the E has the most but i dont like that cam at all)


i plan to have steel motor mounts too (i really like the roughness; makes the car fell bad-ass)

[475HP '03 cobra]

well doing more resarch i ca see that the F will make more low end torque....in that case i may consider it but, a few question first so you guys can roccomend me a ford racing cam 3:55 gears, looking for low end power, 5-speed manual, 1992 GT, and it has to fit this combination i have listed in the post: 1.7 roller rockers, AFR 165cc heads


so what would each of you suggest?

[Italian LX]

I would suggest an aftermarket intake if you don't already have one. :yup:

[coupe]

:think: Where do you get your "torque figures" for the B, E, and F-cams? I run a TFS Trick Flow Stage 1 cam and it absolutely friggin' rocks on the bottom. And it pulls at least as high as an F-cam. I mean heck, my car went 12.7 @ 109 with nothing more than heads, Cobra Intake, and that cam. :shrug:

[QWKSNKE]

Well duration does matter since the more duration you have the longer the valve will stay open so you chances of piston to valve contact would be greater with a high duration cam but the b-cam isn't that agressive so you wouldn't have to worry about it as long as it's a 87-95 stock 302 like you said.

.

yeah but that is based off cam. My point was that heads are not rated by 'x' duration. Like in his example, he was told that AFR's were rated for a 220 duration cam. The heads do not care about duration. Now ramp speed and lift will make a difference in what valve spring you run but not the duration

[QWKSNKE]

:think: Where do you get your "torque figures" for the B, E, and F-cams? I run a TFS Trick Flow Stage 1 cam and it absolutely friggin' rocks on the bottom. And it pulls at least as high as an F-cam. I mean heck, my car went 12.7 @ 109 with nothing more than heads, Cobra Intake, and that cam. :shrug:


[little kid voice on]

naa..naa.. naa..

My car with the b cam went 12.8@108 with a 1.88 60 and it weighs, like 500 lbs more than your car :poke:

[/little kid voice off]

:jester:

[coupe]

[little kid voice on]
...like 500 lbs more than your car
:jester:

The Cobra weighs 3600#? :eek:
:jester:

[Italian LX]

The Cobra weighs 3600#? :eek:
:yup:

It's a porker!

[coupe]

:lol: I am just gonna have to weigh mine and dyno it someday. :nono:

[Shankin]

well doing more resarch i ca see that the F will make more low end torque....in that case i may consider it but, a few question first so you guys can roccomend me a ford racing cam 3:55 gears, looking for low end power, 5-speed manual, 1992 GT, and it has to fit this combination i have listed in the post: 1.7 roller rockers, AFR 165cc heads


so what would each of you suggest?
My coupe ran 12.20s at 111 with the f cam ,out of the box iron gt40s and a typhoon intake. the same cam ran 7.35 at 92 mph in the 1/8th with just a swap to brodix heads and a systemax intake. Its all about the combo. I personally like the f cam. i have made 330rwhp with it n/a and over 600 blown. Its not as good as some but will work good on your car. What intake, headers,inj,mass air etc do you have?

[475HP '03 cobra]

when i put my car in i'm revamping everything i will have a: trickflow intake, MAC 76mm straight shot mass air induction system with a 75mm MAF, 75MM throttle body, then AFR 165cc heads with new springs and 1.7 adjustable roller rockers, hardened pushrods, BBK equal length shorty headers with a 2.5 inch off road h-pipe and a flowmaster american thunder 40 series muffler cat-back system, still debating on the cam, and finally a TKO 600 tranny with the correct fitting clutch, o yeah either 24 or 30# injectors, i dont know which is best for my application...you tell me

how much rwhp you think i'll be making?

[93Cobra#2771]

BTW, I recommend mocking up and checking p to v clearance no matter what anyone says. Every combo is different, and there is always the chance that you won't get the cam installed straight up. If it is off by a degree or two, your chances of p to v issues just got greater.

[Italian LX]

. . . o yeah either 24 or 30# injectors, i dont know which is best for my application...you tell me
24# injectors should be enough. :nice:

[475HP '03 cobra]

any of you'll got some guesses for my HP range?

[joker]

any of you'll got some guesses for my HP range?
I would venture to guess around 300 or so to the rear wheels.

[475HP '03 cobra]

yeah, thats what i was thinking aswell. but a heavey price for what i want....i was hoping to improve liability a little aswell thats why i didnt just supercharge it

[QWKSNKE]

cam will determine hp

[475HP '03 cobra]

which one do you suggest and then how much hp you think it will give?

[QWKSNKE]

Look in the dyno room and follow the sheets for the history of my 93. That's my experience.

If running the 'b' cam you will need a custom tune or you will experience driveability issues

[475HP '03 cobra]

what kind of issues?

[QWKSNKE]

idle (especially with the a/c on). I picked up an additional 10-12 rwhp through most of the rpm with a tune as well

[475HP '03 cobra]

gonna be too rough or somthing?

[93Cobra#2771]

The notorious surging idle and bucking syndrome, I imagine...

[475HP '03 cobra]

probably, i was thinking it was rough. i plan to have steel motor mounts too. i may end up with the F cam just becuase of that, i like the low end torques specs better too. either way i will figure out what to do when the time comes for me to do it.

[QWKSNKE]

Why would you want steel motor mounts? Is this a track only project?

[coupe]

My Trick-Flow cam is fine @ idle. With a stock computer and a C&L 73 to boot. Even idles great @ 800 w/ A/C on. Yes, I have working A/C too. :P

[475HP '03 cobra]

i want the solid motor mounts so that all of the shake comes through the car. i really like the feel of it; makes tha car feel bad-a......dunno if i can say that?

[coupe]

:think:

[475HP '03 cobra]

whats up, you guys dont like that shake?

IF YOU ASK ME IT MAKES IT FEEL LIKE A BADASS MUSCLE CAR

[pimpin']

whats up, you guys dont like that shake?

I be likin' da shake too. But da shake I be likin' is da one froms me an my hoe in da back seat knockin da boots. :fro:

[93Cobra#2771]

The shake doesn't bother me, but the resonance, and NVH do...

[475HP '03 cobra]

whats NVH i aint heard that before?

[Italian LX]

whats NVH i aint heard that before?
Noise, Vibration, and Harshness

[QWKSNKE]

I be likin' da shake too. But da shake I be likin' is da one froms me an my hoe in da back seat knockin da boots. :fro:

:lol:

[QWKSNKE]

The shake doesn't bother me, but the resonance, and NVH do...

:werd:

[joker]

I be likin' da shake too. But da shake I be likin' is da one froms me an my hoe in da back seat knockin da boots. :fro: :nono:

[Ultrageek]

I love my B cam - wife hates it of course.

I had a guy in a camaro actually tell me he didn't want to race me because "sounds like you got a lot of work done to your motor - I ain't racin ya"

The B cam has one NASTY idle!

There are much better cams out there tho...