What heads should i be running???? - Mustang Evolution

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Old 12-22-2012, 11:23 AM   #1
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What heads should i be running????

Buying some heads when I get my taxes this year don't know what to get
I have a brand new 308 short block I am building up using my x303 cam gt40 intake manifold and 24lb injectors stuck between choosing the head somebody help eventually I want 500 to the wheels and not much more
And my car has 4.10s and a t5
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Old 12-22-2012, 11:49 AM   #2
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AFR 185's. They are expensive though. AFR claims they make 95hp over the GT40x heads.
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Old 12-22-2012, 12:05 PM   #3
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Are they going to be better than track heat 185s or 170s
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Old 12-22-2012, 12:09 PM   #4
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My dad is using afr 185r heads and they made a HUGE difference

---------- Post added at 01:09 PM ---------- Previous post was at 01:08 PM ----------

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Are they going to be better than track heat 185s or 170s
Afr is the best head u can get for a sbf
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Old 12-22-2012, 12:12 PM   #5
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I have a set on my dining room table that'll be installed this Spring. I "think" from my research that they would be great for your build.
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Old 12-22-2012, 12:14 PM   #6
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I am trying to get more bang for my buck I am trying to find some flow numbers between afr and trick flows 185s
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Old 12-22-2012, 12:17 PM   #7
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I am trying to get more bang for my buck I am trying to find some flow numbers between afr and trick flows 185s
My friend had some trick flows and switched to afr 165 and he said it was a completely different car
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Old 12-22-2012, 12:24 PM   #8
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These are what I am gonna choose between

http://m.summitracing.com/parts/afr-1420

http://m.summitracing.com/parts/tfs-51416410-c01
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Old 12-22-2012, 12:31 PM   #9
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Trust me u will not regret getting the afrs
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Old 12-22-2012, 12:33 PM   #10
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Is the gt40 intake decent enough or is it gonna hold me back a lot?
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Old 12-22-2012, 01:01 PM   #11
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I'm curious about the Gt40 intake holding back these heads as well. The only manifold for sale on AFRs website is the edelbrock rpm 2 so I assume its the best flowing. A little expensive tho.
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Old 12-22-2012, 01:03 PM   #12
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I have the RPM II, based on the same I go you found.
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Old 12-22-2012, 01:13 PM   #13
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Quote:
Originally Posted by Dustin541 View Post
Buying some heads when I get my taxes this year don't know what to get
I have a brand new 308 short block I am building up using my x303 cam gt40 intake manifold and 24lb injectors stuck between choosing the head somebody help eventually I want 500 to the wheels and not much more
And my car has 4.10s and a t5
Your not gonna get 500 rwhp unless you do a stroker and and power adder.

I'm running a 308 with HCI , 30lb injectors and I'm at 310rwhp

My brother has a 347 stroker motor with AFR 225 heads and the Holley System Max II intake and he's dynoed in at 445rwhp
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Old 12-22-2012, 01:14 PM   #14
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Agrees
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Old 12-22-2012, 01:23 PM   #15
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Why not just throw a T trim vortech on your already h/c/i setup? I don't think the V-3 would push enough boost for 500hp but the V-1 should.
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Old 12-22-2012, 01:28 PM   #16
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Why not just throw a T trim vortech on your already h/c/i setup? I don't think the V-3 would push enough boost for 500hp but the V-1 should.
But will the V-1 add 200 + rwhp ? That's alot of boost on a stock block

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The safest way would be stroker with 6-8 psi on a safe tune!
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Old 12-22-2012, 01:31 PM   #17
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I've seen 550hp at the crank on a somewhat stock block LS1 from a V-1. I guess you'd really need a beefed up 302 setup tho. It wouldn't seem very streetable at all tho.
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Old 12-22-2012, 01:36 PM   #18
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I've seen 550hp at the crank on a somewhat stock block LS1 from a V-1. I guess you'd really need a beefed up 302 setup tho. It wouldn't seem very streetable at all tho.
Yea the v-1 is rated to 20psi and that stock 302 most likely would split right down .

---------- Post added at 01:36 PM ---------- Previous post was at 01:35 PM ----------

Quote:
Originally Posted by Dustin541 View Post
Buying some heads when I get my taxes this year don't know what to get
I have a brand new 308 short block I am building up using my x303 cam gt40 intake manifold and 24lb injectors stuck between choosing the head somebody help eventually I want 500 to the wheels and not much more
And my car has 4.10s and a t5
Are your internals forged in your 308 shortblock ?
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Old 12-23-2012, 12:17 AM   #19
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DSS Racing sells a main girdle that they claim enables a stock 302 block to handle 650+, but you will still need a good tune
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Old 12-24-2012, 04:49 PM   #20
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I don't want all 500 right now just always to buy stuff to support it till I throw a turbo on it
I been reading on the afr 185s alot and it doesn't sound like they work on a stock block so that's not good for me right now since I don't have the money to buy new pistons with valve releifs
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Old 12-24-2012, 04:54 PM   #21
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Where did you find that they don't work on a stock block? Just curious to read that.
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Old 12-24-2012, 04:56 PM   #22
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They work on a stock block , but you'll have to get your pistons cut for valve clearance !
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Old 12-24-2012, 04:58 PM   #23
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Any idea what the difference is with valve clearance? The pistons on my block were notched for the Holley Systemax kit heads and I thought I'd bolt these AFR's right on but there may be a difference.
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