deuce_454

I dont get all this fuzz about AFR heads.. when you compare the advertised flow numbers for a set op TSP/PRC stage 2.5 5.3 heads

.300 208
.400 257
.500 290
.600 312

and a set of AFR 205.s

.200 140
.300 200
.400 261
.500 281
.550 292
.600 298

I just dont see the big difference.. are the AFR,s worth the extra 80% (plus springs) over the TSP/PRC heads?? i mean for that extra cash you could buy a fast 92/92 combo...

having Patrick G spec me a cam that propably ends up in the "torque cam" teritory... and the gar will see hard street and autocross time.. no drag strip..

Gh0st

iTrader: (3)

There's more to a head than ADVERTISED flow numbers

Gun5

iTrader: (37)

ya the 205's are a way better head.. from design stand point alot more meat can be ported out to.. those 5.3's are maxed out... but then look at the price

kistlerjm9

iTrader: (24)

compare the port size tsp 5.3's 220 range and the afr's 205's. better velocity and all around better design. dont get me wrong tsp has some of the best heads for the buck. but etp and afr have taken it a step above and beyond.

99zman

iTrader: (23)

from what i see on here, if you want a peak hp # ported stockers are ok, the tq# are not to impressive. if you want power under the curve and some good Tq# aftermarket castings are much better not to mention quality.

1989GTA

I agree with the above posts. You mention the AFR's are 205cc. What are the size of the other heads after porting.

No knock on the TSP heads but remember a sewer pipe will flow a lot of air.

1989GTA

I agree with the above posts. You mention the AFR's are 205cc. What are the size of the other heads after porting?

No knock on the TSP heads but remember a sewer pipe will flow a lot of air.

deuce_454

its just that the cam im looking to install is over .600 lift, that puts the afr´s at 2800 bucks with springs... the 5.3's are 1200.... thats a big difference, and will i get more for my buck buying a fast 92/92, than sticking with my ls6-IM and going with the afr's ?????

PREDATOR-Z

Amen to that, that sums it up pretty well. If you have the $$, take the blue pill and don't look back.

blu1

AFR, ETP and TFS will always outperform ported stock castings. Will the stock castings stay close on a flow bench? Sure, but your car doesn't race on a flow bench.
And Im not biased as I run a ported stock casting head myself, because for the money they are unbeatable if you are looking for a nice setup on a budget.

JScamaro

iTrader: (6)

I've seen the AFR's being sold for $2185 with dual springs.

mesospeedy

iTrader: (8)

My TEA stg. 2 243's flow the same as 215 TFS, but I've seen several combos with similar or smaller cams than what I have make a few more horses and alot more torque!

ExTurbo

All i can say is you get what you pay for, nothing more. 5.3's have put down some good power and alot of guys go pretty fast with them with the right setup. If your looking for a seriously fast street/strip car the AFR's are the way to go. Id say they're good for at least a tenth and one or two MPH over the 5.3's. A ported fast 90 combo will even the playing field a bit with the 5.3's but save for the AFR's then put a fast on them later and you wont regret it.

Patrick G

iTrader: (14)

I am a big fan of buying the best cylinder head you can afford and use that as a foundation for future mods. Having said that, if your budget only allows, say $2500, then you'll make the most power with the more affordable heads and a FAST 92/92. Problem is, when you get some more money in the future, it will be more expensive to gain power after that because your foundation is not as stout as it would be with the aftermarket heads. I must say though, that I have been impressed with the numbers that the latest PRC 5.3L heads have been putting down. The heads continue to be improved over time.

Stang's Bane

iTrader: (22)

I am so sick of this. The only thing you can always say is Nothing is always true. At least half (probably more) of the fastest NA cars on this board run stock castings. Hell G-force just had a Vetter with a 408 that made 601 on ported LS6 castings. A 408. yeah it had a solid roller, but when you take into consideration the size of the cam compared to some of the hyd roller "street" cars on here that put out 600+ on aftermarket castings it was right along the same size.

I am not bashing AFR, TFS, ET etc, all I am saying is that once a good porter (Greg Good, Larry Meaux, and a FEW others)gets started on a set of heads all bets are out the window.

The above castings have their place. Hell to some people, they are the BUDGET choice. The work the above guys do is NOT cheap, but to some, completely worth it.

JMHO and by the way BLU1, I was not really aiming this at you, it just kind of built up over time.

Oh one more thing, if I had to choose between the 2 choices the OP has given us. I would choose the AFR every day and twice on Sunday.

Stang's Bane

iTrader: (22)

Some of the fastest ls cars period are running a TEA ported stock casting.

ls1leadfoot

iTrader: (1)

i have 2 agree on the tsp heads.....i love them with my ms3.....but all things aside....get what you pay for.....afr is a long lasting name and has great product.....
gotta love tsp prices though!!!

Sales2@Texas-speed

iTrader: (5)

PatrickG, thanks for the kind words! I agree with alot of what's been said here and not so much of others. The AFR's are a great head! But to say that it is better than the PRC 5.3's every time is a bit of a stretch. The thick deck on the AFR's makes a great addition to a moderate sized power-adder car! However, with the extra $1000 you spend for the AFR's on a mild cammed street car, you can get into a FAST intake combo, LT headers and true duals, a good start to a beefed up rear-end or a geared 10 bolt, a quality torque convertor like Vigilante, pay off some credit card debt, etc!

We've done consecutive tests on the same car only changing the cylinder heads from AFR to the PRC Stage 2.5 5.3 heads. The results would suprise many! If anyone has any specific questions about the PRC line-up, feel free to call us and we'll be glad to discuss your combo and get you set-up with the cylinder heads and cam that suits you best! And yes, we still offer our customers AFR for certain combos as well as ETP, TFS, etc! We'll shoot you straight!

deuce_454

where???

deuce_454

and what about this one NEW Edelbrock Castings
Precision Race Components 200cc Ported Small Runner Cylinder Heads. Fully CNC ported Edelbrock LS1 based cylinder heads!

http://texas-speed.com/shop/item.asp?itemid=667

2.021.575 Valves
PRC Double Valve Springs .660" Lift
Completely Assembled & Setup To Your Specs!!
200cc Intake Runners
62cc Chambers (setup for 3.900" Bore)


Valve Lift Intake
.100" 72
.200" 149
.300" 205
.400" 249
.500" 283
.600" 303
.625" 306