Another Cam Recommendation Thread--Stock Exhaust Manifolds

[1EFF100]

Okay cam guys, I know you're not real big on this so I ask for forgiveness before hand but please humor me.

Hydraulic flat tappet.

Looking for 450 horsepower, or close to it, at the crank.
370 heads, 2.08 intakes 1.72 exhausts, a little port clean up.
466, Sealed Power hyper pistons, no cut on the deck, appx. compression 8.8-9.0.
Intake will be either a Performer or Ford copy of the Performer RPM.
Would like IF POSSIBLE to use the valve springs currently on the heads--90-95lbs seat pressure.
C-6, stock convertor, 3:00 or so rear gears.
Police Interceptor exhaust manifolds.
Engine going in my 1974 Cougar, street only, no strip duty.

Want excellent throttle response and low and mid range torque.

I can change things up a little if need be but would like to stick with the above deal--IF POSSIBLE.

Thanks again!

[1EFF100]

Okay, spoke with Paul and decided to back off the 450 number. We agreed on a good streetable shelf cam from Crane. Will be able to run the valve springs with a little bit of shim to bring up the seat pressure a tad.
Read a magazine article years ago where they made 425 horsepower with this cam on an engine very similar to mine. However, they ran headers but as I recall, no port work was done other than the smog bump removal.

Thanks.

[1EFF100]

The magazine article I referenced in the above post was in the February 1993 issue of Super Ford titled Intake Inquiry.
They tested 5 intakes including the stocker.
D0VE heads, L2404 pistons with the cam in question, a Crane Powermax 272. Specs are 216/228 @ .050 518/513 lift 112 LS.
Made 520.2 lbs torque at 3250 and 409 horsepower at 5000 with the stock intake. 518.9 lbs at 3500 and 434.6 horsepower at 5000 with the Performer, which won the shootout against the Port-o-sonic, two Ford Power Parts dual planes, Stealth and of course the stock cast iron base intake.
Dyno was a Superflow and was performed at J Bittle American.

[The Mad Porter]

Manifolds will cost you about 35 to 40 HP and nearly as much torque.


SJ
used 2b RHP

[1EFF100]

Manifolds will cost you about 35 to 40 HP and nearly as much torque.


SJ
used 2b RHP

Hi Scott! Hope you had a good Thanksgiving.

Well, even so, it's still nearly 400 horsepower and 500 lbs of torque.

You know, I'd be interested in knowing how much you lose at differing part throttle openings say, quarter, half etc., or would it even be seat-o -da-pants noticeable?

[rmcomprandy]

The magazine article I referenced in the above post was in the February 1993 issue of Super Ford titled Intake Inquiry.
They tested 5 intakes including the stocker.
D0VE heads, L2404 pistons with the cam in question, a Crane Powermax 272. Specs are 216/228 @ .050 518/513 lift 112 LS.
Made 520.2 lbs torque at 3250 and 409 horsepower at 5000 with the stock intake. 518.9 lbs at 3500 and 434.6 horsepower at 5000 with the Performer, which won the shootout against the Port-o-sonic, two Ford Power Parts dual planes, Stealth and of course the stock cast iron base intake.
Dyno was a Superflow and was performed at J Bittle American.

Be very skeptical when looking at power numbers as Wide Open Throttle numbers mean little during Part Throttle usage.

[1EFF100]

The magazine article I referenced in the above post was in the February 1993 issue of Super Ford titled Intake Inquiry.
They tested 5 intakes including the stocker.
D0VE heads, L2404 pistons with the cam in question, a Crane Powermax 272. Specs are 216/228 @ .050 518/513 lift 112 LS.
Made 520.2 lbs torque at 3250 and 409 horsepower at 5000 with the stock intake. 518.9 lbs at 3500 and 434.6 horsepower at 5000 with the Performer, which won the shootout against the Port-o-sonic, two Ford Power Parts dual planes, Stealth and of course the stock cast iron base intake.
Dyno was a Superflow and was performed at J Bittle American.

Be very skeptical when looking at power numbers as Wide Open Throttle numbers mean little during Part Throttle usage.

I agree, Randy. That's why I like big inch motors. I really appreciate off-idle and mid range torque and throttle response.
I'm almost never at WOT while driving on the street.

Do you think this cam is a good fit for what I'm after?

[Paul Kane]

Your combo: 360-370 bhp with the PI manifolds and a very good tune

[The Mad Porter]

Manifolds will cost you about 35 to 40 HP and nearly as much torque.


SJ
used 2b RHP

Hi Scott! Hope you had a good Thanksgiving.

Well, even so, it's still nearly 400 horsepower and 500 lbs of torque.

You know, I'd be interested in knowing how much you lose at differing part throttle openings say, quarter, half etc., or would it even be seat-o -da-pants noticeable?

You did not reference part throttle hp so I offered my take on WOT numbers vs your quoted WOT numbers.

PI manifolds are pretty good and will offer good manners and part throttle driveability.

I've built many truck combinations that utilize truck manifolds and dual exhaust. They drive very well and lay down about 260 to 280 RWHP on a dyno jet inertial chassis dyno. 213 / 227 @ .050" cam timing. Performer intake.

I can't quantify the losses at various throttle openings. Headers certainly help at most RPMs wot or throttled. It is a matter of degrees.



SJ
used 2b RHP

[1EFF100]

Your combo: 360-370 bhp with the PI manifolds and a very good tune

Hi Paul! That is confusing to me a little. How can a 428 CJ with its less cubes, smaller cam, very restrictive exhaust manifolds put down around 400 horsepower, and a 460 with more of everything (except compression) not put down more or at least equal amount?

Manifolds will cost you about 35 to 40 HP and nearly as much torque.


SJ
used 2b RHP

Hi Scott! Hope you had a good Thanksgiving.

Well, even so, it's still nearly 400 horsepower and 500 lbs of torque.

You know, I'd be interested in knowing how much you lose at differing part throttle openings say, quarter, half etc., or would it even be seat-o -da-pants noticeable?

You did not reference part throttle hp so I offered my take on WOT numbers vs your quoted WOT numbers.

PI manifolds are pretty good and will offer good manners and part throttle driveability.

I've built many truck combinations that utilize truck manifolds and dual exhaust. They drive very well and lay down about 260 to 280 RWHP on a dyno jet inertial chassis dyno. 213 / 227 @ .050" cam timing. Performer intake.

I can't quantify the losses at various throttle openings. Headers certainly help at most RPMs wot or throttled. It is a matter of degrees.



SJ
used 2b RHP

Thank you, Scott.

[The Mad Porter]

Through the decent FE CJ exhaust manifolds an oem 428 cj made about 365 hp give or take. Headers and a proper tune closer to 400.

We recently built a 462 stroker CJ with OEM heads and intake with oem carb & a hotter cam. 515 / 440 ... RPM or Promaxx heads offer significant improvements vs oem castings.

The FE heads are intake limited and have a decent exhaust port.



Take a look.


https://www.facebook.com/pg/PpamLLC/photos/?tab=album&album_id=798082780569401


https://www.facebook.com/joseph.micklosii/videos/3003062706371390/




SJ
used 2b RHP

[1EFF100]

Through the decent FE CJ exhaust manifolds an oem 428 cj made about 365 hp give or take. Headers and a proper tune closer to 400.

We recently built a 462 stroker CJ with OEM heads and intake with oem carb & a hotter cam. 515 / 440 ... RPM or Promaxx heads offer significant improvements vs oem castings.

The FE heads are intake limited and have a decent exhaust port.



Take a look.


https://www.facebook.com/pg/PpamLLC/photos/?tab=album&album_id=798082780569401


https://www.facebook.com/joseph.micklosii/videos/3003062706371390/




SJ
used 2b RHP

Nice.

[The Mad Porter]

Through the decent FE CJ exhaust manifolds an oem 428 cj made about 365 hp give or take. Headers and a proper tune closer to 400.

We recently built a 462 stroker CJ with OEM heads and intake with oem carb & a hotter cam. 515 / 440 ... RPM or Promaxx heads offer significant improvements vs oem castings.

The FE heads are intake limited and have a decent exhaust port.



Take a look.


https://www.facebook.com/pg/PpamLLC/photos/?tab=album&album_id=798082780569401


https://www.facebook.com/joseph.micklosii/videos/3003062706371390/




SJ
used 2b RHP

Nice.

Just trying to provide a bit of context on the 428 cj hp vs a 460...


SJ

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