Thinking of switching prc5.3's for afr...
06-01-2009, 01:12 PM
#1
Thinking of switching prc5.3's for afr... I'm thinking about selling my prc 2.5 5.3 heads that have been milled .030 for a set of afr heads... I would probably send them out to tony to have them hand ported and all that great stuff. But my question is will I really see a gain for worth another $1000? My car pulls hard with the prcs, but down 430's on a mean mustang dyno... I just feel like the car has some more in it.. The car has a ms4 in it with a forged bottom end and every bolt on possible... Maybe i'm just asking for to much out of the little 346?
06-02-2009, 12:01 AM
#3
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Well the AFR's out of the box and milled for compression should give you a boost. Tony's handy work should improve you mid and peak numbers. Worth an extra grand ?? Not sure. You could always jump on the TFS 215 bandwagon and get more power without the need for custom portwork. Call Ron at Vengeance. He can set you up properly.
06-02-2009, 07:31 AM
#4
You could also talk with TSP about the gains of upgrading to their new PRC 215 heads. They are the newest cathedral port offering to hit the market and are worth a look.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
06-02-2009, 10:43 AM
#5
We've done this test (5.3's vs AFR 205's with a bit smaller camshaft) on the engine dyno. Give me a call or e-mail and I will forward you the graphs 
Thanks for the referral, Patrick.
Thanks for the referral, Patrick.
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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POWERBOND - ASP - AND MORE!
06-02-2009, 11:09 AM
#6
Your talking about a lot more than $1000 for the AFR top end that Mamo has enhanced.
205's ... like $2150 plus spring upgrade and milling add $200 so they are $2350-$2450
Then to have Tony work them $800-$1200.. better valves add another $150, obviously going to be spinning to 7000 rpms add in $450 for YT UL' rockers.
Lifters $140-$550, head gaskets $70-$160, push-rods $108-$190, coolant, oil, filter...all adds up.
Is it worth the gain?? Thats a personal question that only you can answer
Some guys will spend thousands chasing that last 10-25hp and the more power your making the more expensive it is to make more power.. unless your using a power add of course.. but even then it comes at a price.
Some guys reach a level and are happy with it, realize that making more power will cost almost double what they've already spent and the gains are small and smaller.
At a certain point you realize that more cubic inches is what you need or a turbo and you either resolve to be happy with 450 at the wheels or you start looking at a 408 and up ...LOL
(I've gone from stage 2.5 5.3's to AFR Mamo enhanced 205's on my 347)
Matt you type quick
, you werent in here when I started my post...LOL
205's ... like $2150 plus spring upgrade and milling add $200 so they are $2350-$2450
Then to have Tony work them $800-$1200.. better valves add another $150, obviously going to be spinning to 7000 rpms add in $450 for YT UL' rockers.
Lifters $140-$550, head gaskets $70-$160, push-rods $108-$190, coolant, oil, filter...all adds up.
Is it worth the gain?? Thats a personal question that only you can answer
Some guys will spend thousands chasing that last 10-25hp and the more power your making the more expensive it is to make more power.. unless your using a power add of course.. but even then it comes at a price.
Some guys reach a level and are happy with it, realize that making more power will cost almost double what they've already spent and the gains are small and smaller.
At a certain point you realize that more cubic inches is what you need or a turbo and you either resolve to be happy with 450 at the wheels or you start looking at a 408 and up ...LOL
(I've gone from stage 2.5 5.3's to AFR Mamo enhanced 205's on my 347)
Matt you type quick
, you werent in here when I started my post...LOL