I have them on a 418 100% track car and love them. 13.0 compression with tall roller cam. Making about 720 hp. 1/4 mile 9.45

 

If you have any future plans go with the 220 otherwise stay with the 205 .......

 

club what heads do you have 205?

 

Sorry, I have 225's

 

scj. no future plans. this 408w is going into my 95 mustang and should be the last motor and power level for it for the long haul.

 

Do the 220's.....because they don't have a 240.

You do realize that GM puts heads that flow this much on pickup trucks right? IT'S NOT TOO MUCH!

 

X2

Buy the largest you can afford!

On a side note, the second fact is depressing lol

 

im putting afr 225s on my next motor 393-408 only reason is because I couldn't afford trickflows....

 

Look at the flow charts, specifically to the lift that's in the cam that you're actually running.

There's probably not much difference.

 

I don't even look at those charts anymore... :rofl:

The air speed over the short turn and the lack of dead spots on the new AFR220 is so much better than the older AFR225 heads. Someone over there really spent some time updating a bunch of things on these 20 degree Ford heads.

 

Cam isn't decided. Plan was to have Ed grind a custom profile

 

Agreed go 220s

 

ok...seems the consensus is do the 220's

off topic but I learned that the super victor 351W EFI manifold I plan on using has clearance issues with the 8451 MSD distributor I planned on using. Anyone know what needs to be done for the MSD to work? or better yet any other brands of distributors that don't have clearance issues?

 

Ed...so you think the 220's are the way to go, despite AFR recommending the 205's?

 

The 220`s are not too big, but I would think nice torque with the 205 for a street car.

 

That was my thoughts....

 

Id put 220s on my stock bottom end 302 if the pistons had the radial clearance..its all in the cam

You can never get too much head, contrary to popular belief...also...It does NOT make you go blind either.

 

LOL
Here is some interesting reading
Drag Racing Cylinder Head Selection - Engine Builder Magazine

 

They fricken lied to me all these years.....damn.

 

are the afr 220cc better than the new 205 11R? they look like they actually flow about the same according to their charts. Looks like AFR tests theirs with bigger bore and exhaust pipe though. Im also building a 393-408 and curious what heads to get.

 

I just bought a set of the 56cc TW 11r 205s from Ed for the 331 I got for a song. Having them done up with LSx hyd roller springs and 8mm valves, milling for higher compression, arp studs etc.. keep an eye for track times and such in the next cpu5ple months

 

Can't wait!

 

I run heavily ported 205s on my 331. Big heads work great

 

True dat!

I run way too big heads and a way way too big intake....
Seems to work ok *shrug*

 

Im putting a super vic on a 331..OM F'n G

 

220 -- 221 -- whatever it takes. https://www.youtube.com/watch?v=iX3kxAA2L4Q

 

Haha

 

I don't think any "220"cc head would be too big for a 408. It would all be about what I already had and what I realistically wanted.

 

Me neither!

 

use the 220 which were not available when I bought my 205 heads which work good but bigger is better and the biggest is just right

 

"You're heads aren't too big....your RPM is too low"

 

Yup RPM FTW!

 

Op if you want to have the best street manners and power from 2000 to 6500 I would go with the 205s. I would also recommend a ported victor jr over the super victor. Make sure you get a cam spec'd out by a pro if your like me and don't know enough to pick the perfect one on your own.
The 205 will easily make your goals. If the biggest head that will fit was always best why do they make the smaller ones right?

Someone said gm trucks have heads that flow what the afr 220 flow? Which heads are those? Just curious I am not about to buy a set for my first gen windsor I will stick to the 220s. Lol

 

Someone said gm trucks have heads that flow what the afr 220 flow? Which heads are those? Just curious I am not about to buy a set for my first gen windsor I will stick to the 220s. Lol

The stock GM heads.

And the reason they make smaller heads is for guys who want to build puss engines. Lol