I want to go faster now and I am sick of waiting for the KB to come out as it will probably be next summer. In any event, which heads would be a good choice to go with now if I plan on going with FI in the relatively near future? I will probably go with a monster cam now and just do another swap when I go FI. Also, I will probably go forged down the road (probably no bigger than 383) as well so if I can use the same heads, great. Will the MTI 2e heads be good? Am I asking for too much?

 

AFR 205's is my choice. The 225's would be better for bigger inches, but not stock inch motor. The AFR's make a lot of midrange torque, which is great for a street machine. Plus they have thicker decks which is great for F/I or N20.
But if you want to save some bucks.................wait for the DART heads. They may not make as much HP as the AFR's, but they are about 1/2 the price from what I have read.

 

So the 205s would work with a forged 348 and FI just fine, correct? I am seriously considering the 205s and the G5-X3 for now and just swapping cams when I go FI, then when I finally go forged, increase the boost. I wish I could do it all at once but I just can't and if I keep procrastinating I'll never get any of it done.

 

Hello, I agree with Red99, however if I was you I would get the AFR 225's so down the road you will be ready for whatever project you want to undertake. They are the premiere heads out there and provide a great platform with a lot of versatility.

 

There are a number of good heads on the market. Figure out a budget and what type of CR you want and go from there.

Mark

 

How what the 225s run with all stock internals and displacement? I'm thinking it is impossible to get the best of both worlds and save a little money. More than likely I'll just have to do what everybody does, buy the 205s and the big cam, sell the 205s and the big cam, buy more...

 

If you put the 225's on your stock inch motor, you will suffer in the lower half of your rpm and miss out on the great torque the 205's make. If you go to more cubes later, you can always have the 205's ported for more air flow. But in the mean time you will lose a lot of intake velocity with the 225's on a 346 c.i. motor, unless you are building a 8,000+ rpm all out race motor. Even with the 383 ci, the 205's will flow plenty of air. IMO, you don't need the 225's unless you are over 400 c.i..
Go to LGM's web site! They have lots of dyno sheets you can look at. Look at the motors with the 205's and look at there low- mid range torque.

 

Thanks for the replies! I just may have a 3X kit from Cartek in the near future. Best of all worlds with it. Can use those heads up to a 383 with mucho boost as well as a stock displacement engine for now. I'll just have to swap cams when going with the FI.

 

I have heard the new Darts have thicker decks than the AFR's and flow as good or better . Plus delivery wait is half as long. Add the cost aspect and its a no brainer ...


Dan

 

ET performance is supposedly making the trick head now.

 

Do not go with the 205's if you're going to use AFR's... that's just bad advice. The 225's are constantly giving better numbers on FI and big cam engines, even with stock displacement. Yes they will give up a LITTLE on the bottom, but will also give you more in the upper-mid and at least 20 hp on the top. Also the 225's have a larger combustion chamber which will work much better with your future FI project. W/O a doubt, use the 225's.



Z06VET,
I don't know where you got your info from, but the as cast Dart heads will flow slightly less than the CNC ported AFR's of the same size. The deck on the Darts is only .500, which is thinnner than the AFR's. For the money the Darts are a serious bargain, but the AFR's are a better choice if money is no object. BTW, around the first of the year Dart will offer CNC heads as well, but expect the price to be about the same as the AFR's.



And yes, hp is correct... ET is making the best of the best right now, but they cost even more.

 

I would look into the 11 degree versions myself.

Bruce

 

I will have to disagre somewhat and would say that your advice is Bad advice, not mine! I got the advice from LG Motorsports to use the AFR 205's on my LS1. I would think they know what they are talking about since they have built hundreds of performance and race cars. Yes the 225's will make maximum HP at 6500+ rpm's. But for a street motor where 90% of your rpm time is below 3500, you will not like that head as much, especially in traffic. That's just like saying a .750" lift cam will make more power. Bigger is not always better.
Also if you are building a motor just for a Blower, then I would wait until you had the blower, then build the motor. Instead of building a low compression, big head motor that will be sluggish in low rpm and find out that later you won't be going to a blow later. Plans change. But if you go conservative with the 205's, then it won't matter if you go with a blower or not later. That was my reasoning of going with the 205's. I know I have made plans for someting, then later on changed my mind and went with a different route.

Also I have looked at the flow sheets of the AFR's 205's and the Dart heads, and the AFR's clearly out flow the Darts. Edelbrock is coming out with some heads that are CNC ported too. So you are going to have a lot of choices soon.

 

Also I have looked at the flow sheets of the AFR's 205's and the Dart heads, and the AFR's clearly out flow the Darts. Edelbrock is coming out with some heads that are CNC ported too. So you are going to have a lot of choices soon. [/QUOTE]

I saw a flow sheet of that sort also but the Dart's were out of the box and the AFR's were a bit worked!! I sold my new AFR's and am now waiting on the Dart's...which will of course be sent out for massive work

Sharam

 

Go with the ETP heads. I have mine on order. They out flow AFR across the board. Also the AFR 225 is setup for a 4 plus inch bore motor. The ETP 225 is setup to run on the factory bore.