View Poll Results: Which heads would you prefer?
PRC 200CC Terminator Heads (milled or not)
27
20.93%
AFR 205's (milled or not)
90
69.77%
other (why)
12
9.30%
Voters: 129. You may not vote on this poll
Cylinder heads poll: AFR vs. Terminators
Cylinder heads poll: AFR vs. Terminators I am changin my set up on my car..I am looking for more power under the curve, and not so much top end.
Assumptions- Assume the new cam specs will be something like a 228/232 on a 112....
Aside from price (which I do not want to be a determining factor) which head has the better features pound for pound? I need pro's and cons of each design, and anything else you guys want to put in...
All ideas/comments welcomed!
Thanks
Erik
Assumptions- Assume the new cam specs will be something like a 228/232 on a 112....
Aside from price (which I do not want to be a determining factor) which head has the better features pound for pound? I need pro's and cons of each design, and anything else you guys want to put in...
All ideas/comments welcomed!
Thanks
Erik
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
def. wrong forum. if i had to buy heads, i'd either get the AFR's, edelbrocks or TFS's. they seen to have the best reputation and historically the best performance backed up by some of the best names in the business. for your poll, names don't get much bigger than AFR's. i doubt you'd get better quality elsewhere.
then again, i wouldn't be someone's first choice to go to for information about heads, so take it with a grain of salt.
then again, i wouldn't be someone's first choice to go to for information about heads, so take it with a grain of salt.
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This may not be a very fair poll. There are probably 100 sets of AFR 205s sold for every set of Terminators sold. Even if the Terminators were better, you'd be hard pressed to get a majority win from actual users.
It's interesting that we haven't seen many numbers from the PRC-modified Edelbrock heads. Anyone out there besides Termin8r?
It's interesting that we haven't seen many numbers from the PRC-modified Edelbrock heads. Anyone out there besides Termin8r?
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
im going to say out of the 2 the afr's would be my choice. they make a really nice head and seem to know what they are doing. with the 228/232 on 112+0 u will want the heads milled to 61cc w/ a .045 cometic gasket. that will give a cr reading of 11.33/ 8.58 assuming everything clears w/o having to flycut. that would be a nice little set up. 
and do yourself a favor and sent your stock rockers to hs for a rebuild.
and do yourself a favor and sent your stock rockers to hs for a rebuild. 
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by ls2 bait
im going to say out of the 2 the afr's would be my choice. they make a really nice head and seem to know what they are doing. with the 228/232 on 112+0 u will want the heads milled to 61cc w/ a .045 cometic gasket. that will give a cr reading of 11.33/ 8.58 assuming everything clears w/o having to flycut. that would be a nice little set up. and do yourself a favor and sent your stock rockers to hs for a rebuild.
and do yourself a favor and sent your stock rockers to hs for a rebuild.I would duplicate Patrick G's setup.
Originally Posted by Patrick G
Airflow Research (AFR) small bore 225cc heads, CNC ported, milled .036" yielding a combustion chamber volume of 59cc. Static compression ratio of 11.3 to 1, 2.08 intake valves, 1.60 exhaust valves. Double quench pad combustion chambers. AFR #8019 valve springs shimmed to within .050" of coil bind. 158 seat pressure, 440 open pressure.
AFR small bore 225 flow with head milled to 59cc on a 3.900 bore at 28" H2O:
Lift........ .200", .300", .400", .500", .550", .600", .650, .700"
Intake.....141, 206, 256, 290, 301, 309, 316, N/A
Exhaust 122., 181, 210, 227, N/A, 238, N/A, 244 (with pipe)
Cometic MLS .040" head gaskets to give a .032" quench.
Thunder Racing Torque Cam camshaft: 223/227 duration at .050, .636/.639 lift, 110 LSA installed at 110 ICL. Dynamic compression of 8.73 to 1.
To have Patrick Guerra spec you a custom cam, press here:
Comp Cams 7.400" chrome-moly pushrods to accommodate the milled heads and smaller base circle of the cam.
FAST 90 intake manifold velocity ported by Tony Mamo from Airflow Research.
AFR small bore 225 flow with head milled to 59cc on a 3.900 bore at 28" H2O:
Lift........ .200", .300", .400", .500", .550", .600", .650, .700"
Intake.....141, 206, 256, 290, 301, 309, 316, N/A
Exhaust 122., 181, 210, 227, N/A, 238, N/A, 244 (with pipe)
Cometic MLS .040" head gaskets to give a .032" quench.
Thunder Racing Torque Cam camshaft: 223/227 duration at .050, .636/.639 lift, 110 LSA installed at 110 ICL. Dynamic compression of 8.73 to 1.
To have Patrick Guerra spec you a custom cam, press here:
Comp Cams 7.400" chrome-moly pushrods to accommodate the milled heads and smaller base circle of the cam.
FAST 90 intake manifold velocity ported by Tony Mamo from Airflow Research.
Originally Posted by Patrick G
It's interesting that we haven't seen many numbers from the PRC-modified Edelbrock heads. Anyone out there besides Termin8r?
Jason
Last edited by Camaro99SS; Apr 29, 2007 at 08:06 PM.
TECH Enthusiast
iTrader: (1)
Joined: Dec 2005
Posts: 549
Likes: 0
From: Denver International Airport, Colorado USA
I'm running the PRC Terminator Heads, with some fairly decent numbers for a "mild" set-up.
Erik, seems like there were some past issues with matching this head with the Fast 90 Intake manifold. It certainly does not seem like this is a popular head at this time.
There are so many choices with heads and cams today. I just went for smaller runners, picked my head/cam combination to get me as close to 8.5 DCR as possible.
Being an overall fan of smaller runners & higher port velocity, I don't think you can go wrong with either head.
Let us know. You certainly have great numbers now!
Erik, seems like there were some past issues with matching this head with the Fast 90 Intake manifold. It certainly does not seem like this is a popular head at this time.
There are so many choices with heads and cams today. I just went for smaller runners, picked my head/cam combination to get me as close to 8.5 DCR as possible.
Being an overall fan of smaller runners & higher port velocity, I don't think you can go wrong with either head.
Let us know. You certainly have great numbers now!