i was looking on DD2000 and the Performer RPM w/rect. ports out flowed the AFR 190s, not by much, but its all a numbers game. If this is true why is all the hype about AFR and not Perf. RPM. im not trying to **** anyone off, i just was curious, since im buying new heads here shortly. Thanks

 

DD2000 isn't always accurate.

If you're getting new ones, check into Pro Lightnings... www.procylinderheads.com

 

Pro lightnings are good heads, but the AFR's out perform them, as well as every other small block head on the market right now.

the AFR heads KILL the performer heads on a flow test, dont believe alot of the things the desktop dyno tells you...its just a good ballpark estimation tool.

the afr's have even outperformed heavily ported heads with better flow numbers on the dyno (i think it was actually a totally cnc ported set of pro lightenings) the ported heads flowed better, but on the dyno the AFR's made 30hp more. this is probably because of the excellent midlift flow characteristics and port velocity of the heads. theres more to the story than flow

 

I thought someone said the Pro Ls flow equal too or better than AFRs?

either way, for the price I'm glad I got the Pro Ls.

 

i cant remember the numbers exactly...but i remember you saying what the pro's cost you, and i wouldnt have passed it up either....they are great heads. Im almost positive that the AFR's flowed better than EVERYTHING as delivered. like a heavily ported PRO head will outflow a nonported afr head. but complete CNC porting the AFR's trash pretty much everything out there. They are really starting to dominate the scene. But like i said, they tested them against better flowing heads on the same motor on a dyno, and the afr's made 30 more HP.

check out afr's site, they have all the flow numbers there i think, there is an article on the CHP testing they did with all the different heads....but i just looked and the pro lightenings arent there. so you'll have to check on that.

 

Never believe what you read about flow numbers.

EVEYONE LIES. That's cold reality. Nobody's head ever makes the flow numbers the manufacturer claims.

Well, AFR comes close. They're the excpetion that proves the rule. But the basic rule still applies: EVERYONE LIES.

Here's a couple dirt-cheap heads I have found work great (regardless of what flow numbers you might have heard):

L-31 Vortecs. For a near-stock motor, best way to fly. I have several friends running them with good results. GREAT results, actually. BUT.... If you are going to run a cam with more than about .470" lift then forget about all the expensive upgrades to the Vortecs, go straight to....

Dart Iron Eagles. 200cc intake. Power like you put a second engine under the hood vs. S/R torquers or stock heads. Best buy in iron, IMHO. They'll outrun the Vortecs by a bit, without all the futzing around with upgrading valve springs, screw-in rocker studs, machined-down guides, etc, etc that start to make Vortecs expensive to upgrade. Buy, bolt-on, turn key, drive.

Trick FLow G2 aluminum heads. A little pricey, but I'll put them up against a more expensive set of AFR 195 any day of the week. DAMNED good cheap aluminum heads. Flow like Niagara falls. Efficient combustions chamber. As a bolt-on how about 2 full MPH and 2 tenths over a set of Iron Eagles, no other changes, on a very mild combo already running 13.0 on street radials. I was stunned since I was so happy with the Iron Eagles before I tired these heads.

 

AFR's are GREAT!

I've got a set of 190's on my small block and I love 'em. My brother has some Edelbrocks on his motor and wishes he had got some AFRs. I would seriously consider the AFRs. Check out CHP's head analysis, about as impartial as you can find.(if such a thing exists?)

Anyway, that's my two cents.

Ben71

 

Would anyone really pay $1200-1400 for aluminum AFRs if they could get aluminum Pro Lightnings for the sale price I got of $849?

just wondering, I can see payin a few hundred more if the Pro Ls were $1100 or so like in Summit.

I am just asking, I'm not tryin to flame anyone here or knock AFRs.

 

Rectangular port? Are you sure you're not looking at Performer RPM big block heads?

 

ya that might be true, but more than one magazine and countless people just like us have tested them out in the real world and on the flowbench, and not only do they flow better, but they make more power....EVEN WHEN OUT FLOWED. thats the cold hard truth, and a statement of fact.:hail:

 

I would like to see someone like CHP add those Pro Lightnings to their test. I keep hearing good things about them, and if they flow comparable to AFRs, at that price [$849] how could anyone say no?:hail: Nice flowing aluminum heads that are cheap are everyone's dream. Hopefully we'll see more about those heads and how they flow.

Ben71

 

just remember, i did get one heck of a sale price, but the guy said he would do group purchases of 3 for that price.

 

guys, guys, guys.....your not paying attention here...

there is alot more to heads than flow numbers, port velocity is much more important than flow, as thats what builds your low rpm torque in a street engine. mid lift flow is also more important than max lift flow.....and what really matters is how they perform on a running engine.

 

thanks for the input. ive been reading alot about AFRs and i was looking in my HOT ROD this month and theres two big-wig engine builders in there that said AFRs are the way to go. where could i find out about these prolightning group purchases. id look i in going in on them.

 

Anyone that wants great heads instead of good heads will. When I buy heads for my car, it's going to be in order to get the maximum benefit possible. If that means $1400 AFRs instead of $800 Pros, then that's what's going to get put on. If the AFRs will make an honest 30-40hp over the Pros, then it's money well spent, especially when I upgrade the rest of the motor later and would have been faced with needing better heads again anyway.

 

good point. ive only got stock heads right now, so i plan to see a big difference. the AFR 190s and 195s are $1275 with the heat riser. not really that bad. the heads i got are 71 LT1 heads, milled .020. what gains would you see me getting. they were 76cc and ill be getting 68cc, so compression will be about 10:1 with the new heads. thanks

 

depends on the combo...but it will be signifigantly more powerful

 

30-40 more HP, i highly doubt that, maybe on a 2000hp engine.

 

mark,

i think it was car craft that built a small block and tested it with afr's and some other head that out flowed them....and the motor made 30 more hp with the afr's. i'll try to find the engine combo for ya.....but i know it was a small block in the 500hp range.

 

Maybe so, but it wasn't with a good head like TFs or Sportsman IIs was it?

 

jesus i wish i could remember what exactly the other heads were...... :::thumbing through car craft library:::

im still looking for it mark, but i know they were good heads.
like i said before, its all about the port design, and afr has the most effiencient and fastest port design out there

 

Wow then, 30-40hp more with just AFRs, over good heads, now that is worth it then.

Still don't matter, I stretched my budget on the Pro Ls.

 

yep....i mean there is absolutely nothing wrong with pros mark, they are a good damn head......no problem there

the AFR's are just frican evil :rockon: