AFR MOPAR 340 HEAD TEST!

[a-bodyguy]

i see "street hemi cam" or "hemi grind" thrown around a lot, and it seems that the specs are always ambiguous. would you happen to know what that one was

280 280 474 474 238@50 992 cam
i recalled it as 471 474 thought it was the 213 cam maybe the 992 was the newer cam
was the 213 cam 234@50 471 474

sounded better then all my 340s as i used rhoads lifters on the g/k 243@50 508 lift 108 106

 

[Mean416]

Aftermarket cam + stock converter and gears = sucks donkey balls at the launch.

Easy to spend a couple hundred on a cheap but big cam but lots of guys don't wanna pony up that couple grand for the matching converter and gears. Then they come back asking why its a dog lol.

 

[ir3333]

For sure...a big cam is a bad choice if you don't like a high stall converter and steep rear gears
in your daily driver!

 

[TT5.9mag]

Sure does sound cool in the high school parking lot though.

 

[fishmens67]

Sure does sound cool in the high school parking lot though.

We all started out somewhere.

 

[TT5.9mag]

We all started out somewhere.

Yup. I started at the bottom of the comp cams page.

 

[fishmens67]

Me too. and with 2.73 gears. hang on after 3000rpm

 

[273]

Me too. and with 2.73 gears. hang on after 3000rpm

My car is similar, I bet most are, it's hard to make any real power under 3,000 rpm cause hp is 50% of torque @ 2,626 rpm, 25% @ 1,313 rpm, why diesels need to make ridiculous amounts of low rpm torque to make any usable power.

 

[a-bodyguy]

My car is similar, I bet most are, it's hard to make any real power under 3,000 rpm cause hp is 50% of torque @ 2,626 rpm, 25% @ 1,313 rpm, why diesels need to make ridiculous amounts of low rpm torque to make any usable power.

spray fixes that the hemi grind in the 318 with 3.23s and a torker needed it

 

[273]

spray fixes that the hemi grind in the 318 with 3.23s and a torker needed it

Yes it would

 

[fishmens67]

spray fixes that the hemi grind in the 318 with 3.23s and a torker needed it

Have you ever built anything fast that didn't run on spray

 

[a-bodyguy]

Have you ever built anything fast that didn't run on spray

My cars were over camed and under geared i liked to top end race 1/4 - 1/2 - 1 mile 2 miles so i guess thats a no
My duster from a 40 mph roll to 150 mph was tuff to beat
Had both a 4spd then a 727 then back to a 4 spd
243@50 108 106 cam even with rhoads lifters didnt like 3.23s a 27 tire and a torker door stop so the spray allowed me to have bottom end
Current car needs a resto had since 1986 the 103k virgin 68 340 lower end iam not spraying that has a new top end 2.02s 268h stealth 650 dp 3.91s 1st time small cam/ and gears Drivetrain came out of matching number 68 gts sunfire yellow black longitude stripe car you know the car i told you went 14.3@97 plus mph with 3.23s stock @ 85k miles you said bs. It rips pretty good with that 268h cam and gears for 103k lower end before the 3.91s from 3.23s gear swap it was still much quicker then the 14.3@85k miles id guess 13.9 14.0 with 3.23s and 13.7 13.8 with 3.91s Ive been looking for a 68 dart for a couple years to drivertain swap but about given up might just sell the car and buy a done car

 

[crackedback]

Spray fixes everything

I've built a lot of stuff, they all ran much harder on spray!

 

[Mopar603]

Trick Flow is above the competition in both price and quality.
Charlie Chan heads will take some money to be on par with the American made product and still be behind in overall quality.

I hope so. I JUST, like 4 hours ago, ordered a set of TF190 for my Duster. I currently have stock-ish X-heads. I was debating between AFR (in stock) VS TrickFlow190 (December) I went TFS. I have a new Eddie AirGap and Holley750 DP waiting to go on as well. Engine has good parts inside and 10.5.1 compression. Currently has an RPM and 650 AVS, which I feel is holding it back with the cam size, 3.91 gears and TKX 5spd. We'll see. I'd be lying if I said none if it was for looks. I've always wanted aluminum heads, an AirGap and Holley carb.

 

[273]

I hope so. I JUST, like 4 hours ago, ordered a set of TF190 for my Duster. I currently have stock-ish X-heads. I was debating between AFR (in stock) VS TrickFlow190 (December) I went TFS. I have a new Eddie AirGap and Holley750 DP waiting to go on as well. Engine has good parts inside and 10.5.1 compression. Currently has an RPM and 650 AVS, which I feel is holding it back with the cam size, 3.91 gears and TKX 5spd. We'll see. I'd be lying if I said none if it was for looks. I've always wanted aluminum heads, an AirGap and Holley carb.

View attachment 1716447577

View attachment 1716447578

TF's should make more power than AFR's especially with a decent size cam.

 

[fishmens67]

TF's should make more power than AFR's especially with a decent size cam.

should? lol
.300 and above the Trick flow kicks AFR butt.

 

[273]

should? lol
.300 and above the Trick flow kicks AFR butt.

Cause of nitpickers just use to not making or can be interpreted as a definitive statement.

 

[Earlie A]

The AFR head comes from the Steven Sun foundry

I made this statement earlier in this post. It may be incorrect. I have an AFR head and a ProMaxx (Steven Sun) side by side. I do not think they come from the same foundry. It appears that the AFR is a copy of the ProMaxx but could be made elsewhere. There are color and texture differences in the castings, differences in machining methods and a little bit of difference in sizes and shapes of certain areas.

The metal color and texture on the AFR head look like the Speedmaster. But Speedmaster uses helicoils in the exhaust bolt holes and in the rocker shaft bolt holes. The AFR has neither. The AFR and the ProMaxx have 6 angles from throat to chamber. The Speedmaster has 4. The AFR has a CNC throat blend. The Speedmaster has nothing and the ProMaxx is a hand blend.

So this could mean a third Chinese factory making SBM heads?

AFR on the left, ProMaxx on the right. Blue arrows indicate some differences.

And one more difference. The rocker shaft fits in the saddle of the AFR head nicely without wobble. Speedmaster apparently has trouble making that happen.

 

[PRH]

How about a close up of the AFR rocker shaft saddle.

 

[Earlie A]

AFR first, then SM then ProMaxx.

 

[fishmens67]

AFR on the left, ProMaxx on the right. Blue arrows indicate some differences.

Very minimal, just another foreign remake of the same.

 

[NC Engine Builder]

I dont know if I have mentioned it or posted about it, but one ABSOLUTELY neccessary modification to the AFRs is the grinding of the drain back slots. If not, the oil level in the head with the engine running ends up above the outer valve cover rail

 

[PRH]

I dont know if I have mentioned it or posted about it, but one ABSOLUTELY neccessary modification to the AFRs is the grinding of the drain back slots. If not, the oil level in the head with the engine running ends up above the outer valve cover rail

To me, that’s one of those things I find inexcusable.

That wouldn’t even add a minute to the cnc machining operations to the casting to relieve that.

 

[gzig5]

I made this statement earlier in this post. It may be incorrect. I have an AFR head and a ProMaxx (Steven Sun) side by side. I do not think they come from the same foundry. It appears that the AFR is a copy of the ProMaxx but could be made elsewhere. There are color and texture differences in the castings, differences in machining methods and a little bit of difference in sizes and shapes of certain areas.

The metal color and texture on the AFR head look like the Speedmaster. But Speedmaster uses helicoils in the exhaust bolt holes and in the rocker shaft bolt holes. The AFR has neither. The AFR and the ProMaxx have 6 angles from throat to chamber. The Speedmaster has 4. The AFR has a CNC throat blend. The Speedmaster has nothing and the ProMaxx is a hand blend.

So this could mean a third Chinese factory making SBM heads?

AFR on the left, ProMaxx on the right. Blue arrows indicate some differences.

And one more difference. The rocker shaft fits in the saddle of the AFR head nicely without wobble. Speedmaster apparently has trouble making that happen.

View attachment 1716448139

Don’t get tied up by the machining features being different on the heads. They could still be cast in the same house and then machined by different companies. It is uncommon in my experience to have castings finish machined by the casting house. Casters are good at casting, not machining and vice versa. My company studiously avoided having casters do the machining because of poor past experience. Not unheard of, but don’t bet on it. They should also have different machining specs.

Also, companies tend to own their own molds so seeing different surface finishes or features coming out of the same caster is not surprising. It’s not like speed master is sharing the mold with ProMaxx. Could be, but not likely in my experience working with US, Taiwan, and Chinese casting houses.