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What heads and headunit question

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Old Jul 28, 2011 | 10:59 PM
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Default What heads and headunit question
Been kicking around the idea of maybe rebuilding my blown 347 and going with a procharger.

Here is what i have

TFS 215's, VRD ported fast 102/102, 1-7/8 headers, tru duals, and a un-wired 255 in the tank.

Bob said i could drop the FAST fuel pump that comes in his kit in-line to my intank pump and be good for 700rwhp. With the 60 lb'r of course.

I would be running his blower cam if i did this.

My question is this... should i rebuild the 347 and go with a d1
OR
go iron 370 with f1a

I know my fuel system is going to limit both set-ups to around the same power level.

But my biggest worry would be the size of my cylinder heads on the 370.
Last edited by My6speedZ; Jul 29, 2011 at 02:02 AM.
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Old Jul 28, 2011 | 11:07 PM
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im a fan of using what you got... its usually cheaper... why not just build the 347 and put the f1 on it?
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Old Jul 28, 2011 | 11:11 PM
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Didn't know if that was an option.

are there any 347's running the f1a's
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Old Jul 28, 2011 | 11:16 PM
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You'll be fine with the 347.. personally I like the weight savings with aluminum over iron too so when I am ready to build a motor it will be an LS2/3 block depending. I'm pretty sure I've seen a 347 w/ F1A and it was pretty sick.
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Old Jul 29, 2011 | 02:03 AM
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Originally Posted by djfury05
You'll be fine with the 347.. personally I like the weight savings with aluminum over iron too so when I am ready to build a motor it will be an LS2/3 block depending. I'm pretty sure I've seen a 347 w/ F1A and it was pretty sick.
But if i did put the f1 on the 347 would the 215's be holding it back alot?
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Old Jul 29, 2011 | 02:20 AM
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No I don't think so.. what is your idea of being held back a lot? I am sure you could trade those out though if you really wanted to. Or get them ported is another idea.
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Old Jul 29, 2011 | 11:56 AM
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Originally Posted by djfury05
You'll be fine with the 347.. personally I like the weight savings with aluminum over iron too so when I am ready to build a motor it will be an LS2/3 block depending. I'm pretty sure I've seen a 347 w/ F1A and it was pretty sick.
KP got into the 8.80 range with his 347 and an F-1A with our blower camshaft. This was with AFR 225 heads. Bob
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Old Jul 29, 2011 | 01:42 PM
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Originally Posted by djfury05
No I don't think so.. what is your idea of being held back a lot? I am sure you could trade those out though if you really wanted to. Or get them ported is another idea.
I can have them ported by AI since they are local if i needed to. Perhapse on the next go around, when i step up the fuel system i could upgrade the heads as well.

Originally Posted by Bob@BruteSpeed
KP got into the 8.80 range with his 347 and an F-1A with our blower camshaft. This was with AFR 225 heads. Bob
Bob is there going to be any differences in power delivery or drivablity with 6-speed 347 with a d1 vs a f1?
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Old Jul 29, 2011 | 03:12 PM
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Originally Posted by My6speedZ
I can have them ported by AI since they are local if i needed to. Perhapse on the next go around, when i step up the fuel system i could upgrade the heads as well.



Bob is there going to be any differences in power delivery or drivablity with 6-speed 347 with a d1 vs a f1?
No, not really. The F-1A is going to be quite a bit louder, but it generally is music to most peoples ears. Bob
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Old Jul 29, 2011 | 03:52 PM
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Im putting together an f-1a on my forged 347 with Bobs FI cam and some AFR 230 heads.
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Old Jul 29, 2011 | 04:21 PM
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Reguardless of the motor you run, you should get an F-1.
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Old Jul 29, 2011 | 07:03 PM
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^^ that way when the motor goes you already have the blower.. no need to change it out
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Old Jul 29, 2011 | 09:56 PM
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Originally Posted by My6speedZ
I can have them ported by AI since they are local if i needed to. Perhapse on the next go around, when i step up the fuel system i could upgrade the heads as well.



Bob is there going to be any differences in power delivery or drivablity with 6-speed 347 with a d1 vs a f1?
I plan to run some Trickflow 220cc as cast heads that I will be getting them to CNC for me. I run their 243s now and love them! Great guys! F1A ftw.
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