HO cams for 4.7 litre PT engine.

[Classic Boy]

By comparison to old school muscle car small block cams a 224* duration @.050" is pretty tame but I guess that was to keep emissions authorities happy.

I reckon given the vast improvements the port design of the 4.7L over earlier iterations of cast iron V8 head's and the roller rocker cam design the 4.7L would really take to some more duration like a 'duck to water'.
If meeting benchmark emissions is a less of a concern for you and more right foot mumbo was desirable then a 235 or 240 degree duration cam would really wake it up.

[billbo90]

Yes i agree,
With my tri y's and 2 1/2 into 3" single exhaust running some performance cams and hi flow intake with a good tune i reckon one could say u could unleash the beast ( for a 4x4 ) speaking, still wont be no "ss" but even the few hp one could gain is still a gain IMO.

[Tyvokka]

Originally Posted by Classic Boy

By comparison to old school muscle car small block cams a 224* duration @.050" is pretty tame but I guess that was to keep emissions authorities happy.

I reckon given the vast improvements the port design of the 4.7L over earlier iterations of cast iron V8 head's and the roller rocker cam design the 4.7L would really take to some more duration like a 'duck to water'.
If meeting benchmark emissions is a less of a concern for you and more right foot mumbo was desirable then a 235 or 240 degree duration cam would really wake it up.

Hi Classic,

Yeah I agree. Something is always gonna be bigger and better but I am happy with mine. Being a 4.7 everything is as rare as the proverbial. Theoretically you are correct but where does one get them from?

Originally Posted by Grippy

I'm assuming these wake the 4.7 up nicely
What other mods do you have on the engine mate? Was it a fresh rebuild or older motor etc. Cheers

Hey Grippy,

Standard HO Long block, HO Cam Shaft, SCAT Rods, Ross Racing Supercharged Piston Black skirt Ceramic Coat 9.5:1 compression. Crane cams and spring, Solid Lash Adjusters, Cometic Head Gasket, 2008-11 air manifold, 72mm F&B TB, 3" pipes, Deeper Oil Pan, ARP Bolts, F350 front brakes + + .....

Originally Posted by billbo90

Yes i agree,
With my tri y's and 2 1/2 into 3" single exhaust running some performance cams and hi flow intake with a good tune i reckon one could say u could unleash the beast ( for a 4x4 ) speaking, still wont be no "ss" but even the few hp one could gain is still a gain IMO.

Best to chuck in a Hemi 5.7, LS or 4/6BT. , though the 6.2 Hellcat is delectable..

[billbo90]

Hahaha😂 i think the missus would have me by the balls if i even hinted at that. Though if you could get it to fit, it would be something worth bragging about thats for sure!!!
NICE looking piece of work you have there!! Wish i had ur wallet 😂

[Grippy]

Thanks Tyvokka, looks the goods. Now you another picture I remember your thread on it somewhere, looks the goods 👍

Well bill, head over to jeepforum, there's a dude there who has fitted a 6.4 👍 in a wj
My wife won't even entertain the idea that the Grand needs more power,

Sent from under my Grand Cherokee

[darryl.jennings.71]

https://youtu.be/m-2SbbVTJkw this guy can tell you the best HO mods.


Sent from my iPhone using Tapatalk

[Tyvokka]

Originally Posted by billbo90

Hahaha�� i think the missus would have me by the balls if i even hinted at that. Though if you could get it to fit, it would be something worth bragging about thats for sure!!!
NICE looking piece of work you have there!! Wish i had ur wallet ��

Thanks mate. You can have my wallet anytime. It's Jeep empty and full of dust and cobwebs. lol!

Originally Posted by Grippy

Thanks Tyvokka, looks the goods. Now you another picture I remember your thread on it somewhere, looks the goods ��

Well bill, head over to jeepforum, there's a dude there who has fitted a 6.4 �� in a wj
My wife won't even entertain the idea that the Grand needs more power,

Sent from under my Grand Cherokee

Yeah, all the pictures there went with fotophucket and I don't have the time, $399/yr or inclination to update the thread..