Is the performance difference of AFR 205 worth the money over PRC LS6 Stage 2.5s?
07-25-2008, 10:16 PM
#1
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Is the performance difference of AFR 205 worth the money over PRC LS6 Stage 2.5s? Good evening.
I'm really considering heads to compliment my cammed LS1. I read that AFR 205's generally put out better numbers than PRC LS6 Stage 2.5's, but are around $600 more.
Do you guys think this performance difference is worth the extra money?
My mods:
Hooker Full Exhaust
QTP E-Cutout
Comp "Custom" cam 231/237 .589 .595 112LSA
Vigilante 3600 Stall
B&M Trans Cooler
Ls1 Underdrive pulley/Harmonic Balancer
Ls6 Intake
SLP LID
The car made 373rwhp/365rwtq.
Thanks.
I'm really considering heads to compliment my cammed LS1. I read that AFR 205's generally put out better numbers than PRC LS6 Stage 2.5's, but are around $600 more.
Do you guys think this performance difference is worth the extra money?
My mods:
Hooker Full Exhaust
QTP E-Cutout
Comp "Custom" cam 231/237 .589 .595 112LSA
Vigilante 3600 Stall
B&M Trans Cooler
Ls1 Underdrive pulley/Harmonic Balancer
Ls6 Intake
SLP LID
The car made 373rwhp/365rwtq.
Thanks.
07-26-2008, 06:48 PM
#7
Why the LS6 heads?
PRCs 5.3l stage 2.5 heads coupled with a FAST 92/92 will most likely make more power than the AFR heads and LS6 intake, and will do it for several hundred less. Drivability difference between the two shouldn't be much - the AFR heads have a smaller runner but the PRC heads offer a better compression ratio - an offset really.
IMO the AFRs may be a better head, but the PRCs are nearly as good.
PRCs 5.3l stage 2.5 heads coupled with a FAST 92/92 will most likely make more power than the AFR heads and LS6 intake, and will do it for several hundred less. Drivability difference between the two shouldn't be much - the AFR heads have a smaller runner but the PRC heads offer a better compression ratio - an offset really.
IMO the AFRs may be a better head, but the PRCs are nearly as good.
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07-28-2008, 07:47 AM
#14
ive been up in the air on the same thing!!
honestly i feel that if the PRC can flow right up there with AFR or flow better and make just about the same number or even more power, then why wouldnt the PRC heads be a better option? we have seen some sick power combos for both!!! both heads will perform well.
honestly i feel that if the PRC can flow right up there with AFR or flow better and make just about the same number or even more power, then why wouldnt the PRC heads be a better option? we have seen some sick power combos for both!!! both heads will perform well.
07-28-2008, 03:23 PM
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Compare the entire flow sheet between the two heads. And as said earlier, you find a fast 90/90 coupled with afr heads, the prc's and fast combo won't win this argument.
07-28-2008, 03:47 PM
#18
Again, nobody here is comparing the AFR and FAST vs the PRC and FAST. I compared the AFR and LS6 intake vs PRC and FAST intake because of the cost issue. The PRC and FAST intake combo costs LESS, and will make more power on anything but a baby cam. The OP is obviously concerned about the cost. The AFR is a better head, but IMO not worth the extra $1100.
07-28-2008, 04:05 PM
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Ok, I here your point about the money. But performance wise, for example, do you think an afr headed ms3 with an ls6 intake will make less on the same car with prc heads. I'm not trying to argue, just trying to understand the theory.
My understanding that a non ported fast combo can net you anywhere from 10-17rwhp over an ls6. The question at hand should be how much more power will be made in comparing a swap from prc heads to afr 205s.
My understanding that a non ported fast combo can net you anywhere from 10-17rwhp over an ls6. The question at hand should be how much more power will be made in comparing a swap from prc heads to afr 205s.
07-28-2008, 04:11 PM
#20
I've seen what my heads, PRCs stage 2.5 5.3L heads flow on the same bench as the AFR 205s. Neither flowed exactly as advertised, but the PRCs flowed extremely well, and are a steal for the price!
Again, nobody here is comparing the AFR and FAST vs the PRC and FAST. I compared the AFR and LS6 intake vs PRC and FAST intake because of the cost issue. The PRC and FAST intake combo costs LESS, and will make more power on anything but a baby cam. The OP is obviously concerned about the cost. The AFR is a better head, but IMO not worth the extra $1100.
Again, nobody here is comparing the AFR and FAST vs the PRC and FAST. I compared the AFR and LS6 intake vs PRC and FAST intake because of the cost issue. The PRC and FAST intake combo costs LESS, and will make more power on anything but a baby cam. The OP is obviously concerned about the cost. The AFR is a better head, but IMO not worth the extra $1100.