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408 finally done (lastest numbers)

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Old Nov 15, 2013 | 11:31 AM
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Default 408 finally done (lastest numbers)
Well this is my first time on the dyno threads. got my 408 done and had sam miller tune it. It has a set of 243s gutted open and a g5xx cam in it stupid me didnt change the stock fuel pump till two days ago. With the stock pump it made 482/471 not to bad. Need to get back with Sam and get it tuned for the new pump he said it should go over 500 lets hope so. Should beable to break the 10 bolt for sure without even trying lol.
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Old Nov 15, 2013 | 02:47 PM
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Very nice! this was on a Dynojet dyno?
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Old Nov 15, 2013 | 04:10 PM
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Yes sir it is a dynojet 248. and those numbers were at 5200 where my stock pump fell off so it should beable to get another 20 or so up to 6500.
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Old Nov 15, 2013 | 05:15 PM
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Oh wow, yeah if you were making those numbers at 5200 then i'd say at least 20 more hp
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Old Nov 16, 2013 | 11:51 AM
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Yea just talked to Bobby at lg motorspots and if I spin it up to 7000 it should make that easy. Will post up new numbers later.
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Old Nov 16, 2013 | 12:04 PM
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More importantly than just the peak hp number will be the power and tq under the curve with that 408
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Old Nov 17, 2013 | 09:16 PM
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most likely will peak out at around 6500-6700 but making that at 5200 is good should def hit the 500 mark
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Old Nov 21, 2013 | 06:45 AM
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Here are the graphs. The last one is overlaid mine and a friends. his is a 370 with tfs 225 heads and a BTR spec cam good numbers on both.
Attached Thumbnails 408 finally done (lastest numbers)-20131120_190046_resized.jpg   408 finally done (lastest numbers)-20131120_190056_1_resized-1-.jpg   408 finally done (lastest numbers)-20131120_190140_5_resized.jpg  
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Old Nov 22, 2013 | 06:42 PM
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Nice. I just had mine dynoed. I'm at 505hp at 5200 and 534 tq at 4400. At 3000rpm I'm already at 490tq. With stock lq4 intake and stock headers. Built for down low
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Old Nov 22, 2013 | 08:47 PM
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Solid numbers. Glad you broke the 500 whp mark!
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Old Nov 23, 2013 | 11:59 AM
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If and when I can get back to Sam I hope to be that 500 club to. So close yet so far next time i do anything it will be a betrter set of heads some tfs 245 possible.
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Old Dec 2, 2013 | 08:31 PM
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Well went and visited senior Miller today and got new numbers. got it to 522/494 more than I had hoped for but said might still be more left but now my damn volage is dropping off at 5800 to below 12. So now to fix another problem and try again although I dont think I will gain to much more on this set up. Will get pic of new graph in a day or two.
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Old Dec 2, 2013 | 08:45 PM
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Impressed with your numbers.What compression is your motor?
I have a pair of 243's sitting in the closet while I save up to send them to AI.
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Old Dec 2, 2013 | 08:52 PM
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10.8 static. I like the heads they work well enough for now. I need to turn my attention to the rear and trans before I even think about going for bigger gains in hp. How much is AI going to charge if you dont mind my asking what valve size also.
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Old Dec 2, 2013 | 09:51 PM
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Originally Posted by pkozera
10.8 static. I like the heads they work well enough for now. I need to turn my attention to the rear and trans before I even think about going for bigger gains in hp. How much is AI going to charge if you dont mind my asking what valve size also.

http://www.advancedinduction.com/LSX...cGMLS2Head.php

I want to go with 2.08 1.60 valves along with a custom cam to compliment them.Im not sure on total cost but this link will give you a idea.I had planned TFS/TEA 245's,but I had to scratch that.
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