347- AFR 185's, Edel RPM II and custom cam

[Brian992V]

Friend is putting together a 347 and he will be using AFR 185's, Edelbrock RPM II intake, custom cam, 1 3/4 full length headers, 75mm t/b and 80mm MAF sensor. After a tune, what kind of horsepower should he have at the rear wheels?

 

[eagleautosports]

Should be around 400 easy depending on the cam. But know that RPM II is more for the upper rpm than the standard RPM, even though it's supposed to have the same RPM band. It'll pull all the way to 6800-7000, I've seen one do it.

 

[Grn92LX]

Depends what his goals were when he had the custom cam designed. 375-425 is what i'd say.

 

[5spd GT]

Depends on how track oriented the combo is...

a/c delete? power steering delete? aluminum flywheel? etc...

That combo is exactly the same combo I do if I was doing one...

 

[Quikstang]

Yea, I would def be looking for 375 - 425 ish with a good tune and quality machine work.

 

[N8Miller]

Depends what his goals were when he had the custom cam designed. 375-425 is what i'd say.

yep.

 

[bob331T76]

yep.

second that!:SNSign:

 

[5spd GT]

Your not going to get 50rwhp from just the difference in one custom cam to the next. Other factors are in that...

 

[aleborjas]

and what about the same combo with XE274 cam,10.1 CR, 30 pounders, RPM intake ported, 70mm TB, like how many RWHP and torque?

 

[r.barn5.0]

You'll be limiting your power on the 347 using a 302 cam
strokers need more duration.

mo-better cam for 347
http://www.jegs.com/webapp/wcs/stor...irect&categoryId=41269&parentCategoryId=10707

drop'n one in my 351W project now.

 

[tmoss]

There is a very basic reason larger cube engines need more duration - it is the ratio of displacement growth to limited valve size growth. Since the valve size is limited much more than displacement growth, more duration is needed to fill a cylinder.

 

[5spd GT]

Yep, 302 cams don't need all that duration because it wouldn't do any good, the cylinders can only feel up so much...larger displacment has more room to fill. So let the valve be open longer (longer duration, ex: 228...to 238*) to allow more air in.