Indy 440-1 heads on a 71 gtx/roadrunner

tgc · Jun 5, 2012

Hey guys/gals

I got a 71 GTX with a non-air grabber hood and looking to the buy a drop filter that will fit under the hood. can some one point me in the right direction for set-up that will work with my combination? motor is not in the car so I can't take any measurements on how much drop I will need.

Bonus internet points for any one that can provide a picture of the setup in question.

Thanks for any help!

67 coronet · Jun 5, 2012

i have always done the measuring after assembly,a whole lot easyer that way.you can run out of clearance really fast with tall intake.

Stumper · Jun 5, 2012

The heads aren't the issue. What intake are you runing? If you have the Indy 440 intake on that thing I don't think you will find a drop filter that will let it work. I run a drop filter base on mine with the Indy intake just to get it to clear the underside of my hood scoop ...

tgc · Jun 6, 2012

Stumper said:
The heads aren't the issue. What intake are you runing? If you have the Indy 440 intake on that thing I don't think you will find a drop filter that will let it work. I run a drop filter base on mine with the Indy intake just to get it to clear the underside of my hood scoop ...

I don't actually have an intake selected or bought yet. but I am trying to find the combination that works with the indy heads and will still fit under my hood.

do you have recomendations for me?

Stumper · Jun 6, 2012

You'll need to stay with a pretty flat, OEM style I believe. The EB "gap" intake might work with a dropped filter base. K&N makes a dropped base for the 14" filters. I think it drops 1.25 or 1.5".

tgc · Jun 6, 2012

I guess I was under the impression that I had to use an indy manifold with the 440-1 heads. which means my options would be the 440-2 or 440-3 manifold and they 6.75" tall. So am I miss reading something or can I use any mainifold I want?

Sorry for the n00b questions. this is the first big block mopar I have ever built.

rgp266 · Jun 6, 2012

The Indy dual plane intakes are, so I have been told, based on the Edelbrock CH4-B (?) design which was previous to the Performer RPM design. It seems to me that the intake port opening in the 440-1 head is already max wedge size/spacing. Performer RPM intakes may bolt to the head but there will be a large port mis-match. The other issue is headers/exhaust manifolds. If you use the -1 heads on a B block then any header designed for a 440 (remember; the -1 heads have a raised exhaust port location) will work. If you have a RB block it requires a header designed to work with that taller port location. It also seems to me that you needed to use a Vally Plate and Intake gaskets designed just for those heads. I think you can steer clear of hood/airfilter clearance isssues if you stay with a dual plane intake......Indy's single plane intakes are seriously tall.
Bob

tgc · Jun 6, 2012

well you are correct about the valley plate, you have to use indy's with the 440-1 and also my engine is an RB so that means I have to buy custom headers from TTI or similar source.

So if I were to buy the eddy manifold and put on the 440-1 heads and have port miss match just to get stuff to fit under my hood I think I would be losing some of my gains the heads are giving me. even if I port match will I see all the benifits of the heads should be giving me? just seems like I would be half-a$$ing together this way.

This question was ask because my engine is at the machine shop right now and they are assembling my short block for me after it is machined. the heads I choose will dictate which cam is put in the engine. and he is now ready to order rotating assembly parts. I've been looking at the Eddy RPM heads and the 440-1 heads. I would like to run the 440-1 heads because even though they cost a little more I will be making more hp per dollar spent, but it appears I am running into fitment issues if I run the 440-1 heads.

The is being built for street cruising and the occasional drag strip duty. at this point I am thinking I will end up buying the Eddy heads so I don't have to worry about fitment issues.

I'm just trying to make the most use of my money and only buy parts once!

Moparmatt72 · Jun 6, 2012

I thought the 440-1 heads were stock ports just capable of being opened to max wedge, the only heads I know of being cast with max wedge ports besides mopar, is the victors, all other are just opened up.

Stumper · Jun 6, 2012

The 440-1 heads are Max Wedge ports

lewtot184 · Jun 6, 2012

the 440-1 has a raised port as compared to a stock iron head. that coupled with a tall max wedge port window intake will create issues. some kind of serious drop base, maybe 1 1/2"+ will be needed with a holley type carb. a friend of mine had a set of indysr's on a 440 with the indy dual plane and he had to use a 2" tall filter element (maybe 10" in diameter) to fit under the hood of his '64 plymouth using a 800cfm edelbrock .

Stumper · Jun 6, 2012

The Edlebrock Performer RPM is made for the Max Wedge ports and might be the best bet. But you'll have to get some measurements and check.

tgc · Jun 6, 2012

Thanks for the help and input everyone. I spent some time at the machine shop today taking measurements of different combinations and I'm not seeing the -1 setup fitting in my car with out putting a huge scoop on my car. not really looking for that on a street cruiser with occasional track duty. I think I'm gonna go with the eddy rpm heads to prevent any fitment frustrations.

tgc · Jun 6, 2012

Stumper said:
The Edlebrock Performer RPM is made for the Max Wedge ports and might be the best bet. But you'll have to get some measurements and check.

is there any way I can get you to give me a measurement from your china wall to your carb flange on your manifold?

Stumper · Jun 6, 2012

You got me on that terminology... what is a china wall? I use the tall Indy single plane intake on my motor so not sure if the measurement would help??

Moparmatt72 · Jun 6, 2012

Stumper said:
The 440-1 heads are Max Wedge ports

Okay but yours are cnc'd, aren't the non cnc heads regular port. I'm not trying to argue just what I've thought I've read about them. Sweet looking heads by the way. I can't wait to get my victor max wedge heads back from getting cnc ported.

tgc · Jun 7, 2012

Here is your china wall.

I'm curious about your measurement because at the shop we found one that was .200 taller than the advertised measurement.

Stumper · Jun 7, 2012

Thought that might have been what you were referring to, China Wall eh..

I'll see if I can find a way to get the measurement today. I'll need a way to project a straight edge from what ever part of the top flange may be exposed. You might be able to get this measurement from Indy more accurately?

The 440-1 heads are MW ported even before CNC polishing

lewtot184 · Jun 7, 2012

tgc said:
is there any way I can get you to give me a measurement from your china wall to your carb flange on your manifold?

the edelbrock rpm intake is a standard port window intake. taking it out to max wedge size may require some welding at the intake/head flange. it is still a pretty tall intake, nearly identical in height to a 6-pak.

Moparmatt72 · Jun 7, 2012

Stumper said:
Thought that might have been what you were referring to, China Wall eh.. I'll see if I can find a way to get the measurement today. I'll need a way to project a straight edge from what ever part of the top flange may be exposed. You might be able to get this measurement from Indy more accurately?

The 440-1 heads are MW ported even before CNC polishing

Okay good to know thanks

Indy 440-1 heads on a 71 gtx/roadrunner

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