AS S2.5 5.3 or AFR 205?
08-24-2004, 04:14 PM
#23
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Originally Posted by 2000Blackout
Hmmm who could that be? 
Three and a half months but whos counting! The problem is with the CNC program on the 6.0L heads 
The 5.3's should be fine.
Three and a half months but whos counting! The problem is with the CNC program on the 6.0L heads The 5.3's should be fine.5.3 and 5.7 stage 2 heads can and will ship in the 3 Week range. Stage 2.5 usually take up to an extra week due to more machine work and extra hand porting.
As a side note a set of Absolute Speed 5.3 heads just put down 461 rwhp 413 rwtq. this was on a 6spd 2001 camaro SS qtp headers off road pipe 4.10 gears in a 10 bolt ls6 intake ported TB g5x2 cam and all the usuall bolt ons. The car was done at the shop in my sig.
08-24-2004, 04:29 PM
#25
TECH Senior Member
Originally Posted by z28mccrory
I just got some new heads from TEA (S3 5.3 heads) and they flowed 311@550 and 321@600lift. These should make excellent power and they can be had for less than the AFR's...
Numbers speak for themselves.
Head Info:
2.02/1.60 Valves
Flowed on a stock bore
Lift .200 .300 .400 .500 .550 .600 .650 .700
Intake 139 193 245 293 310 320 322 325
Exhaust 110 156 199 217 223 227 229 230
Those numbers seem to be pretty good considering that was the first pair GTP has seen and hasn't had a chance to experiement with them. These heads were flowed on both an SF-600 and an SF-1020. The numbers for both flowbenches were exactly the same.
2.02/1.60 Valves
Flowed on a stock bore
Lift .200 .300 .400 .500 .550 .600 .650 .700
Intake 139 193 245 293 310 320 322 325
Exhaust 110 156 199 217 223 227 229 230
Those numbers seem to be pretty good considering that was the first pair GTP has seen and hasn't had a chance to experiement with them. These heads were flowed on both an SF-600 and an SF-1020. The numbers for both flowbenches were exactly the same.
And this is a Stage 3 by TEA, that one is a 4.0 bore
These are the flow numbers from our Bare AFR castings with our Stage 3 CNC program and blended by hand. After completion the Intake Runner is 238 cc's. These were flowed at 28" of water and on a 4.000" Bore. We feel that the AFR castings will help alleviate most of the head gasket issues that everyone has had in the past. The price will be $2,995 for these heads, complete and ready to bolt on. We are going to work out all the specifics and breakdown the parts list in the morning. The first pic is the shot of the AFR end stamp and intake runners. The second is of an intake bowl port after the CNC Stage 3 program has ran and the last pic is of the hand finished bowl and combustion chamber. Enjoy
Lift CFM
.100" 68.1
.200" 141.2
.300" 207.5
.400" 261.6
.500" 304.6
.550" 323.4
.600" 341.2
.625" 346.0
Lift CFM
.100" 68.1
.200" 141.2
.300" 207.5
.400" 261.6
.500" 304.6
.550" 323.4
.600" 341.2
.625" 346.0
08-25-2004, 07:23 AM
#27
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z28mccrory,
What was done to your 5.3's to make them flow that much? All the numbers I've seen were in the 301-309 range with the higher being hand finished? Are they doing something different now? Those are some really great #'s!
I've been waiting on my AS 5.3's for about 2.5 months. I was told 3 weeks when I ordered. Oh well, I don't have a choice but to wait now!
What was done to your 5.3's to make them flow that much? All the numbers I've seen were in the 301-309 range with the higher being hand finished? Are they doing something different now? Those are some really great #'s!
I've been waiting on my AS 5.3's for about 2.5 months. I was told 3 weeks when I ordered. Oh well, I don't have a choice but to wait now!
08-25-2004, 07:37 AM
#28
TECH Senior Member
Just got an e-mail from TSP. My AFR's have arrived, just a couple more days to mill them .030 (W/.043 Cometics) for a final 11:1 CR.
Can't wait to slap them on with he new cam.
Can't wait to slap them on with he new cam.
08-25-2004, 09:11 AM
#29
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What is the duration/lift of your new cam ?
Also what pushrod length are you using?
7.4's used as an upgrade with aftermarket cams is larger than stock GM, aftermarket cams have a smaller base circle from what I understand, but now your milled as well.
Milled .30 for "a bit" less than a 62cc may yeild 11:1 but some folks say closer to a 59cc chamber is required for that 11:1 (Gasket thickness and deck height varience non-withstanding)
The Chamber volume sticky has some good info on this. If I had to close today I would go with the .30 mill as well.
I really want to know what you can stuff in milled AFR's without cutting the pistons. I am researching a similar set up.
Also what pushrod length are you using?
7.4's used as an upgrade with aftermarket cams is larger than stock GM, aftermarket cams have a smaller base circle from what I understand, but now your milled as well.
Milled .30 for "a bit" less than a 62cc may yeild 11:1 but some folks say closer to a 59cc chamber is required for that 11:1 (Gasket thickness and deck height varience non-withstanding)
The Chamber volume sticky has some good info on this. If I had to close today I would go with the .30 mill as well.
I really want to know what you can stuff in milled AFR's without cutting the pistons. I am researching a similar set up.
Last edited by Mirek; 08-25-2004 at 09:29 AM. Reason: forgot pushrod length ?
08-25-2004, 09:38 AM
#30
TECH Senior Member
Well I talked to Tony M. a while back as I was going to mill .040 for a 60cc chamber with stock gasket for an 11:1. He recommended the .030 with a thinner gasket for better "quenching" of intake charge.
He also said that the biggest to run safely .100>.125 PV clearance would be a 224.
So since I want a quieter cam but still with punch, I chose a 224/220, .581/.581 116+0 Stealth II (MTI) XE-R lobes.
I'm hoping for 430rwhp with headers/pulley/80mm TB/fipk/cutout/tuning (We shall see) through 10 bolt.
He also said that the biggest to run safely .100>.125 PV clearance would be a 224.
So since I want a quieter cam but still with punch, I chose a 224/220, .581/.581 116+0 Stealth II (MTI) XE-R lobes.
I'm hoping for 430rwhp with headers/pulley/80mm TB/fipk/cutout/tuning (We shall see) through 10 bolt.
