[dci]

We are going to offer a 75 cc and a 85cc chambers which should cover most applications. There is some room to modify the chambers to get a few more cc's out of them, but we will do that by hand. The deck on my ram air 5 head is pretty thick. So if someone wants a smaller chamber. Milling up to .200" off the heads will be no problem. For every .006" you loose approximately 1 cc. So for example, .060" off the deck would give you around 65 cc's.


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[mike leech]

Sounds like a winner

[Stan Weiss]

Originally Posted by dci

We are going to offer a 75 cc and a 85cc chambers which should cover most applications. There is some room to modify the chambers to get a few more cc's out of them, but we will do that by hand. The deck on my ram air 5 head is pretty thick. So if someone wants a smaller chamber. Milling up to .200" off the heads will be no problem. For every .006" you loose approximately 1 cc. So for example, .060" off the deck would give you around 65 cc's.


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

Hi Don,
With you chamber design does the size have much impact on flow (pressure recovery)?

Stan

[dci]

It definitely does. We just made a couple of changes to the chamber and are going to test them to see if it helped or not. The first chamber design we started with has a pretty hefty valve drop. So we made a transition change off the seats that we think should pick up the low lift flow numbers a little. The problem is what you think works, and what actually works are two different things LOL. If the modifications help, I am going to incorporate them into the heads for sale. The combustion chamber definitely does have an impact on the flow curve, but some times it will not show up on the dyno or track. It will most likely take another piece of the puzzle to see any benefit.


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[cgeise]

Originally Posted by dci

It definitely does. We just made a couple of changes to the chamber and are going to test them to see if it helped or not. The first chamber design we started with has a pretty hefty valve drop. So we made a transition change off the seats that we think should pick up the low lift flow numbers a little. The problem is what you think works, and what actually works are two different things LOL. If the modifications help, I am going to incorporate them into the heads for sale. The combustion chamber definitely does have an impact on the flow curve, but some times it will not show up on the dyno or track. It will most likely take another piece of the puzzle to see any benefit.


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

I wish more people would pay attention to the middle sentence in your statement -- good luck .

[dci]

I agree Curt, I wish they would too. I also wish I had a dollar for every time I had to explain this to a customer. Mainly because they think that if it is in a magazine it must be true LOL. Now that I think about it, kind of like the internet LOL.



Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[cgeise]

I would take it even a step further - even real sharp guys can get off target sometimes -- thinking something will work - and it just doesnt -- at least not as well as they had hoped, thats why we have dyno's, flow benches, and race tracks -- and thats why they play the GAME -- GO SEAHAWKS -- LOL

[dci]

Here are a couple of the cad pic's of my intake design were we are currently. We decided to try and cover a large audience with this design as you will see in the pic's.I designed it so it will accept several different top plates. This way we can use anything from a single four all the way up to a blower without having to buy another intake. I put allot of meat around the ports for porting too. Remember I am trying to keep it low to fit under the hood of most cars. We got our initial height measurements from a 1967 Firebird with a factory cast iron intake and a stock 400 hood. I believe that is the tightest under hood configuration we have in the Pontiac body line up. I am also going to add some internal features around the port openings as well, but they are not yet in place in these pic's. You will see on one of the end runners that I am adding bosses for fuel injection or nitrous as well.


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[estep455]

looking good Don.

[428RA4]

It does look great Don. All you need to do now is to make a swap out top plate for single or dual quads. Kind like a bathtub top end that can be removed for different carb applications along with different bolt patterns.

That would solve your dual quad desires.

mo

[RAMAIR RICK]

Don, the intake manifold looks like it is coming along nicely. Based on the way the intake runners are currently intersecting into the plenum, it looks like my friend Don from Saginaw, will really like the layout for his blower engine that he is putting together!! I am looking forward to seeing the top plates for the a single bbl. as well as the dual quads. I think you will have EVERYONE'S needs covered with this great design layout. Please keep the updates coming, as spring is around the corner, I THINK.....

[moparcolt]

Dual quads! And will fit under a 400 hood on a 67 firebird? Sounds like they will work perfect on my car!! Cant wait to see it in person!!

[RAIV-Z]

Very nice Don, will you be offering gaskets to? If the fit the other RA-V heads to, I could use a few sets.

[dci]

Thanks guy's, I want the intake to be very versatile and user friendly. I can see anything from a single four, dual quads, three two's, Weber down drafts, fuel injection, all the way up to a 1471 supercharger. I struggled for along time about what style intake to make that would fill the largest void. This design is still not going to make everyone happy, but I learned along time ago. That you just cannot make everyone happy no matter what you do.

Ed, I am making intake and exhaust gaskets for my heads, and do believe that they will work for you as well. That is of course if your heads have the stock ram air 5 port locations. My intake port opening is 2.550" round and the gaskets will be 2.600".


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[10second70GP]

Coming together . Great job don can't wait to see the real thing all together .

[GTOGEORGE]

Supercharger intake...............hmmmm!


GTO George

[J.C.you]

Don, I have not skimmed your entire thread. Are you going to offer a head porter version?

[428RA4]

Hey Don -

I've been thinking about your new release of intake designs and must commend you upon your hard work. Any good project needs to have versatility as much as you can. I feel you have covered much of what people want in a configuration.

I would be the first to bone up on an intake from you, but it fits your heads only. What would it take to make it work with a stock set of heads?

mike

[dci]

J.C., If you mean a porters version like Edelbrock's pro port, no. I did cast the heads without a combustion chamber though, and the port has plenty of material around it for porting. So I guess it all depends on what one would consider a porter's version. I do know for sure that the head responds real well to porting. Even as good as it is as cast it wants more LOL. I can and will provide the bare castings without the seats and guides installed if someone wants them that way.


Mike, Thanks for the Kudo's!!!
You can use my intake on stock heads. You just need to build a tall deck block with your heads and my intake LOL. I raised the port a little over an inch from stock on my heads, and I don't want to make the intake flange 1 1/2" thick. That would be the only way someone could use my intake on a stock deck height block. They would need to mill an inch off each side to make it work LOL. I guess if someone really wanted to use my intake on a stock head. They could get real ambitious like yourself, and cut the flange off. Shorten the runners and weld it back together, but that would take wild men like you and Tom S. to do that LOL.



Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[428RA4]

Don -

As long as it's doable, I'm in the market. I have some other plans brewing so nothing is off the table for me right now. Do you have a target date yet? Even a ballpark would be OK.