dferg99

iTrader: (2)

Hey guys I have a 6.0 iron block (370 cu) all forged that has A.R.E. 853 ported heads. They flow 305@ 600 lift (2.02 and 1.6 valves). I have a MS3 cam on a stalled a4 3200 vig. I'm thinking of swapping heads maybe some AFR 225 or similar what are your thoughts? Will bigger heads give me a lot more HP over the ported 853's. The car is built for N2O spraying a 250 shot. If i go bigger will I lose any low end torque?

SOMbitch

iTrader: (8)

Don't know what your definition of a "lot" more power is but the thicker AFR deck would be a benefit if you ever wanna spray even more....

austinsguitardude

iTrader: (3)

not necessarily the 225s would go better with a larger displacement engine ie: 408 with yours i would go with afr 205s or tfs 215s the smaller combustion chamber will give you more compression which will give you more power. but if your on a budget some good ls6s will do a nice job as well

dferg99

iTrader: (2)

Okay now I had one speed shop tell me get the AFR 225 over the 205's. Since I only have a 370 cu I understand what you are saying. Now I'm wondering will the 205's make more power than I'm making now with the ported 853's. I compared both flow numbers and my 853's flow 305@ 600 lift very close to the numbers of the AFR 205's

66deuce

iTrader: (1)

IMO go with the AFR225s..they'll work better with the 4.030" bore and you won't lose anything down low...don't believe the internet myth about bigger ports hurting low end power...

PREDATOR-Z

Cheaper than both with similar results> LS3 heads

66deuce

iTrader: (1)

i was going to suggest that as another option,but since he's spraying a 250 shot the extra beef of the AFRs would hold up better after repeated nitrious use,IMO..

PREDATOR-Z

250 is peanuts, a progressive controler and studs are all that is needed.

66deuce

iTrader: (1)

and a good tune!lol..

dferg99

iTrader: (2)

so in your opinion would you choose the AFR 225's over the tfs 215 because of the thicker deck and me spraying 250 shot or better of N2o

SOMbitch

iTrader: (8)

TFS has a 5/8" thick deck just like AFR. But PZ has a great point. Unported L92's will beat both those heads for less $$$$. The IM selection is another matter but.......