Patrick G

iTrader: (14)

Another great combo that shows how much streetable power there is to be found when following the "recipe". Those Mamofied combos perform every time. Great work Tony.

PREDATOR-Z

what can say? and that is RWHP

with a relatively small cam for Cid size.

I keep saying "AFR 205 in a league by itself"

Flielow

iTrader: (9)

Nice numbers, Im gonna have to save for a lil more time I guess

brad8266

iTrader: (23)

Damm tony, great numbers from a such a small cam. Those heads are for sure tried and proven. I bet that car rides nice also.

ChocoTaco369

Badass. All I gotta say. That torque curve is disgusting. Yowza.

Tony, if you are ever overstocked and have to give away a set for some reason, send one my way

jujofields

^AGREED! My T/A can be used for "testing" purposes any time!!!!

BigBronco

iTrader: (2)

Completely agree! Looking good Tony.

1989GTA

Like the saying goes "the proof is in the pudding". Not only does Tony talk the talk but walks the walk. Excellent numbers.

TLewis4095

iTrader: (10)

Hard to beat your heads Tony....pretty much the standard to beat. We still see some of the best results w/your heads.

Hemi Killer

iTrader: (6)

Tony, how much would a set of the 205s be with the mild porting you mentioned?

AU N EGL

What cam and would happen if Tony TRIED to get a flat torque but maximum torque curve?

What cam would he use to get very high torque, or say nice flat torque curve from 2500 up to 5000 rpms?

ssmith512

Those are OK results I guess.

LOL!!

Simply amazing.

The Alchemist

iTrader: (19)

Nice results for sure, especially since it's a 383 and not a 402 or bigger.

-Joseph-

iTrader: (12)

Nice!

BTW Tony I sent you a PM a few days ago, let me know if you didn't get it. Your probably as busy as I've been lately.

Tony Mamo @ AFR

iTrader: (13)

Guys...

Thanks for all the positive commentary etc. This little stroker actually surprised me a bit and I secretly had some lofty expectations for it.

For the guys asking me about pricing on portwork etc., this type of thing is better handled by phone or PM so feel free to reach out and say hello.

Im going to try and quickly touch on some of the questions that were brought up as well....
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Yes they are....I have successfully used these on a few of the last few engines I have built personally and have had excellent results with them.


Obviously from the results of this engine the performance potential of a properly ported set of 205's are fairly obvious....don't forget guys this engine is going to have razor sharp throttle response and excellent tip-in and part throttle grunt (where you spend 90% of your time driving). If you really want to enhance the lower/middle part of your curve while still being able to out up a very respectable peak number, these heads seem ideal. For those cars that spend most of the week sitting in the garage and roll out on Friday night just looking to do some damage the AFR 225's might be a better choice as they will make a little more peak power (very little when compared to the ported 205 but technically an out of the box 225 is still $700 or so cheaper). The extra torque from the smaller head may even provide traction issues so that's something that should be considered as well. If your already traction challenged the larger head may just soften the bottom enough to help.


I'm still working on the 235-240 cc AFR cathedral head and am also in the process of building a 447 for my own ride that I plan on debuting that head on. Based on the preliminary flow numbers of the new heads and the fact I will build it with the utmost concern of every small detail (like most engine projects I am involved in), I am confident it's going to put up some very impressive numbers while still remaining streetable on 91 octane fuel I might add. The 235 program got derailed for months due to other higher priority design tasks (that stuff isnt up to me unfortunately) but it looks like the goal is to have a set at potentially SEMA or definitely PRI which is really just around the corner. I will update you guys as things draw closer....


Unless we are discussing electric motors, truly flat torque curves are impossible to come by. An engine being what it is will simply always have some sort of a curved torque plot (especially with good flowing heads and a performance cam) due to higher engine speeds bringing in more air and fuel (more effectively filling the cylinders) ultimately creating more cylinder pressure from every combustion cycle at higher RPM. Smaller engines (even this displacement) will never look good on the bottom of the curve and will always have a torque curve that "ramps up" as the engine spins higher because the additional air mass and airspeed starts to better utilize the cylinder head. A bigger engine will move enough velocity thru the intake and exhaust ports that even in the very low RPM's they effectively use the intake/exhaust ports (but may be port/flow limited at higher RPM's hence the reason big inch engines always roll over sooner and harder than a smaller CID would with the same heads, induction, exhaust, etc.)

Looking at this particular engines results, the entire torque curve has numbers more indicative of larger displacement engines, and if you were to knock out the middle of the curve (the hump if you will), while you would technically have a flatter curve (say peaking at 475 RWTQ) I would much rather have the original curve with the 500+ torque figures jammed in the middle!


Just been running crazy here Joe....just call me at AFR when you have some time. Leave me a message if you miss me with the best number to reach you back at.

Thanks guys....



Tony

Justin93

iTrader: (7)

ugh if I only had another $3k to spend after the transmission rebuild and Cam I would own a set of these heads! I better get the GF to start saving for a Christmas present LMAO!!!

1989GTA

"Those look like the ultra lites on that motor. "

Are we talking about the roller rocker arms?

Tony Mamo @ AFR

iTrader: (13)

Yes....the ultralites are referencing my choice of rocker arms.

-Tony

z28poweredlt1

iTrader: (1)

I thought that Dyno screen looked familiar, I had my car dyno'd @ Mikes shop last year. I'll be heading back there again after I put new heads on it this weekend.

Looks like great numbers for the setup. Wish I could afford them myself.

Did George tune this?

ExTurbo

excellent results Tony! I always enjoy reading your posts, its a learning experience every time.