Intake manifold porting.

Posted By: moparmat

Intake manifold porting. - 07/17/09 05:57 AM

Hello all.

So I plan on putting together a nice RB based stroker in the ball park of 540 cubes.

I need an intake that will support enough flow to feed this monster. Cam will be carefully selected custom grind, heads will likely be CNC Stealths. Engine will not go over 6500rpm.

Only concern about the intake is it should look as close to stock as possible so, the Edelbrock performer or the Mopar factory replacement aluminum intake (same manifolds). My only other option would be the Indy RB dual plane but would like to stick to the factory stock appearance.

Who around can or has ported the Mopar or Edelbrock intakes to support that many cubes?

Posted By: sixpackgut

Re: Intake manifold porting. - 07/17/09 05:59 AM

you mean the engine wont go over 5500

thats a bad combo unless your pulling houses

Posted By: moparmat

Re: Intake manifold porting. - 07/17/09 06:08 AM

Its approximately 3500lbs and primarily street driven.

the heads will have more work done to them and the cam will be selected to best suit the top end. The intake is where im running into issues with keeping it stock appearing.

the INDY will deffinately feed the engine but doesnt look very stock.

Posted By: sixpackgut

Re: Intake manifold porting. - 07/17/09 06:16 AM

my 493 with edel rpm heads and a tunnel ram was done before 6000 rpm and ran 10.50s at 3800 lbs

put 295 indy EZ's on it with the indy dual plane at least. paint the whole thing orange and no chevy or ford guy will know the difference

Posted By: Bob_Coomer

Re: Intake manifold porting. - 07/17/09 06:28 AM

Quote:

you mean the engine wont go over 5500

thats a bad combo unless your pulling houses

Gotta agree. That many cubes you need to step up to a Indy, or B1 head.
IMO
Building that many cubes with a stock block isnt a very good idea either....dang by now, your probably mad at me.

Your just not going to get any RPM's out of that engine. Most would shoot me for saying this, but a 470 inch engine with those same heads will be much better runner. And you wont be trying to tear out the stock main webbing too.
Speaking from experience I built a 493 RB engine with Edelbrock heads, it was a nice running street engine. But after 5700 rpm it was like running up against a brick wall. These engines had some camshafts in them too, not just a 3/4 race cam LOL

In other words the intake will not be the bottle neck..its the heads

Posted By: BSB67

Re: Intake manifold porting. - 07/17/09 12:21 PM

Do you have a performance goal?

Member Chagjr is running a F.A.S.T. 4bbl comb. presumably on a stock or modified stock intake. First time out, he went 12.0s @ 116+ mph with a poor 60'ft and poor weather conditions. I'm sure he'll be running 11.5s before long. Possibly contact him.

The CH4B is an option that will look more stock than an RPM, but should perform better than a stock manifold.

Have you actually compared the Indy and RPM intakes side by side? My opinion is that the Indy intake is more stock appearing than the RPM. They are about the same height, but the Indy's runner shape more closely follows the factory style.

Posted By: RemCharger

Re: Intake manifold porting. - 07/17/09 05:11 PM

Quote:

Hello all.

ball park of 540 cubes.

I need an intake that will support enough flow to feed this monster.

Hmmmm.

Quote:

Only concern about the intake is it should look as close to stock as possible so, the Edelbrock performer or the Mopar factory replacement aluminum intake (same manifolds). My only other option would be the Indy RB dual plane but would like to stick to the factory stock appearance.

2nd option.

Quote:

Who around can or has ported the Mopar or Edelbrock intakes to support that many cubes?

I'm gonna have to go with "no one" for a hundred.

What are your goals? besides visual of course.
Where are you located?? ie; near SIR?

Posted By: moparmat

Re: Intake manifold porting. - 07/17/09 08:03 PM

Remcharger, I am located in Saskatoon. I have been out to SIR many times.

Posted By: Darryls-Demon

Re: Intake manifold porting. - 07/18/09 01:35 AM

Quote:

Quote:

you mean the engine wont go over 5500

thats a bad combo unless your pulling houses

Gotta agree. That many cubes you need to step up to a Indy, or B1 head.
IMO
Building that many cubes with a stock block isnt a very good idea either....dang by now, your probably mad at me.

Your just not going to get any RPM's out of that engine. Most would shoot me for saying this, but a 470 inch engine with those same heads will be much better runner. And you wont be trying to tear out the stock main webbing too.
Speaking from experience I built a 493 RB engine with Edelbrock heads, it was a nice running street engine. But after 5700 rpm it was like running up against a brick wall. These engines had some camshafts in them too, not just a 3/4 race cam LOL

In other words the intake will not be the bottle neck..its the heads

Posted By: MoparforLife

Re: Intake manifold porting. - 07/18/09 02:11 AM

FWIW there is no coomparison of the stock or Performer to the CH4B. And yet the CH4B will look almost as stock as the Performer.

Posted By: sixpackgut

Re: Intake manifold porting. - 07/18/09 02:16 AM

Quote:

FWIW there is no coomparison of the stock or Performer to the CH4B. And yet the CH4B will look almost as stock as the Performer.

lets all take a moment to soak that in

Posted By: MoparforLife

Re: Intake manifold porting. - 07/18/09 02:26 AM

Quote:

Quote:

FWIW there is no coomparison of the stock or Performer to the CH4B. And yet the CH4B will look almost as stock as the Performer.

lets all take a moment to soak that in

Would you rather I said that the CH4B will look almost as stock as the Performer will resemble a stock intake. Ah heck you know what I mean.

In any case the CH is a far superior manifold.

Posted By: sixpackgut

Re: Intake manifold porting. - 07/18/09 02:41 AM

Quote:

Quote:

Quote:

FWIW there is no coomparison of the stock or Performer to the CH4B. And yet the CH4B will look almost as stock as the Performer.

lets all take a moment to soak that in

Would you rather I said that the CH4B will look almost as stock as the Performer will resemble a stock intake. Ah heck you know what I mean. In any case the CH is a far superior manifold.

gotcha, thats good to know because when the 540 sucks the boosters out of the carb, getting to the combustion chamber in a far superior manifold will greatly improve its performance

oh god i'm bored. someone paypal me some money

Posted By: MoparforLife

Re: Intake manifold porting. - 07/18/09 03:00 AM

Quote:

Quote:

Quote:

Quote:

FWIW there is no coomparison of the stock or Performer to the CH4B. And yet the CH4B will look almost as stock as the Performer.

lets all take a moment to soak that in

Would you rather I said that the CH4B will look almost as stock as the Performer will resemble a stock intake. Ah heck you know what I mean. In any case the CH is a far superior manifold.

gotcha, thats good to know because when the 540 sucks the boosters out of the carb, getting to the combustion chamber in a far superior manifold will greatly improve its performance

oh god i'm bored. someone paypal me some money

You are on the wrong page now. You have to go to the charities post in the general section for that.

Posted By: 451Mopar

Re: Intake manifold porting. - 07/18/09 09:41 AM

Quote:

Hello all.

So I plan on putting together a nice RB based stroker in the ball park of 540 cubes.

I need an intake that will support enough flow to feed this monster. Cam will be carefully selected custom grind, heads will likely be CNC Stealths. Engine will not go over 6500rpm.

Only concern about the intake is it should look as close to stock as possible so, the Edelbrock performer or the Mopar factory replacement aluminum intake (same manifolds). My only other option would be the Indy RB dual plane but would like to stick to the factory stock appearance.

Who around can or has ported the Mopar or Edelbrock intakes to support that many cubes?

With the combination your looking at you will be lucky if the intake/heads flow 300 cfm @ 28", and with 540 cubes the engine will be done at 5,500 rpm, although it should be making over 550 HP?
Your also going to need a huge carb, 850 cfm minimum. If this is a street car, the piston will need to be dished to lower the compression ratio. I would shoot for around 10:1 compression.
To get the flow through the heads, you will likely need a roller lifter cam with over 0.600" lift, and maybe 245+ duration @ 0.050". You may be able to use a high ratio rocker arm (1.7:1) with your combination?

The six-pack intake is decent, and looks stock (for a six pack car?)
I like the Indy dual Plane intake or Performer RPM?

Check out this tech article from Hughes:
http://www.hughesengines.com/TechArticles/602portedintakemanifoldsupdated08272007.php

Posted By: moparmat

Re: Intake manifold porting. - 07/22/09 02:04 AM

I have read that article several times and talked to many people including Dave Hughes himself about porting bone stock/similar to stock intakes.

There are guys around running similar combos with "stock" (ported) induction/exhaust in the mid-low 11's and even 10's. F.A.S.T class guys are doing it and even back yard hobbiest's. It can be done if someone is willing to take the time and plan to make it work.

Look at Muscle Motors, Hughes engines, MCH, etc. porting iron/aluminum heads for 500+ inch motors making close to 600hp. The only difference with the engine I want is to use a stock ported intake. Its a street car so no need to spin it to the moon. 5500 Max rpm is ok with me if I get 550-600hp and 700ft.lbs. It can work!

I recall some posts a while back about 3.23 geared cars with big inch motors in the 10's. all i want to do is use a stock appearing ported intake and heads. Low lift flow seem to be the ticket with the heads.

I am not looking to run in the 9's YET. But a stock appearing GTS 440 Dart in the low 11's would be cool!

Posted By: CH3NO2

Re: Intake manifold porting. - 07/22/09 02:42 AM

You will need some heads that flow in the 350cfm and up range. Thats like building a 408 small block with 273 heads..sorry