31camaro

iTrader: (2)

I was taking a look at these heads

http://www.airflowresearch.com/index.php?cPath=27_28

and noticed that on their site it says they require a LT4 intake manifold, but on other sites such as summit i think it say they require a LT1 intake manifold, my question is which manifold is required for those heads, and help is appreciated.

ElkySS

iTrader: (6)

i have those heads on my motor. it requires and lt4 intake. im almost certain of that, but to be sure just call afr and ask them. i think they have an lt1 version too

31camaro

iTrader: (2)

thanks for dropping in, i figured so, are you using a gm lt4 manifold? and overall with those heads what kind of numbers are you making? if you dont mind me asking, i was considering the the smaller lt1 heads, but idk how much they can be ported i suppose i will have to give them a call and ask

ElkySS

iTrader: (6)

yea im using a gm lt4 intake. its on a 396 so my numbers might be a little off from yours, if i had any. hasnt been dynoed yet. but im hoping for 440-450 rwhp. we will see tho, those heads are too small for a 396

31camaro

iTrader: (2)

I heard they have some meat on them to port, you could have them ported and help that motor breathe, thanks for the info, i'll be giving them a shout soon to get some more info on them

ElkySS

iTrader: (6)

nah ill probably sell the and get a set of ai ported trick flows. they told me on a motor my size, i could pick up 50 rwhp. but we will see. its not going to happen any time soon tho

Puck

iTrader: (17)

I would save your money and port the afrs instead.

The castings are pretty much made to be ported and have a TON of meat.

ElkySS

iTrader: (6)

well i really prefer ai, i called them and asked if that was an option and they said theu dont like to port afrs. im not sure why. probably cause they are so expensive new

Puck

iTrader: (17)

I would guess a small part of it is because the different models are different castings, and the higher cc ones are LT4 heads, so they would need multiple tool paths to CNC them...but the main reason probably has something to do with them being a TFS supplier and being able to get a killer package to the customer for a good price .

Both are stellar heads and overkill for most builds, but if you already have the AFRs it would be cheaper and easier to have those ported.

To each his own though, either way will have the potential to reach your goals .

ElkySS

iTrader: (6)

they said they would do it but they would have to do it by hand because they dont really do afrs and it wouldnt be cost effective.

Wicked94Z

iTrader: (26)

oh no! they'd have to port by hand??? my hand ported afrs were cost effective and they work quite well.

ElkySS

iTrader: (6)

lol idk thats just what they said.

ElkySS

iTrader: (6)

idk i might look into it as an option a little more.

care to reveal flow numbers? or what cc they are now?

WS Sick

I have AFRs and i have priced having them ported in the future, it really is a wide range of prices. I have quotes all the way from 650 to 1300$ but still cheaper than a new set of CNCd heads.
The higher priced ones were also replacing the guides.

But all promised over 300 cfm @ .600 lift.

ElkySS

iTrader: (6)

hmm maybe it wont be a bad idea

Puck

iTrader: (17)

Not that CFM really matters as much as people think, but 300cfm is not hard to get from AFRs. FWIW A friend from another board has some barely touched up ones that flow 290, and they are the tiny castings.

They won't be as cost effective as CNC'd TFS heads if you didn't have any heads right now -and no doubt AI has a killer TFS package - but you already have AFRs so......

ElkySS

iTrader: (6)

im just curious how far out you can take a 195cc. i havent seen anyone offer ported afrs. anyone have Ai ported afrs? they said they used to do it just not much anymore

Ray@Nitrous Outlet

why not get something like the AFR 210s and run them with the AFR cnc port options

ElkySS

iTrader: (6)

i bought the motor used and it cam with the 195cc. if i have to switch heads ill probably just go with the ai trick flows. unless another head can make more power and still daily drive

96capricemgr

iTrader: (1)

People don't quite comprehend there is a difference between being fastest at bench racing and being fastest on track.

Why on earth would you choose a company to work with then ask them to work with a product they would rather not??? Going to pay a professional for advise just to ignore it?