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408 w/ TEA 5.3's? Flow #'s inside

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Old 06-08-2005, 08:45 PM
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Default 408 w/ TEA 5.3's? Flow #'s inside

How would these heads flow for a 408? TEA 5.3's


LIFT Int Exh.
0.1000 69.5 52.2
0.2000 139.9 114.5
0.3000 200.7 159.9
0.4000 245.9 217.9
0.5000 284.7 246.7
0.5500 298.6 259.3
0.6000 307.6 265.9
Old 06-08-2005, 09:36 PM
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Id like to know also. My 1.5s flow almost the same as yours.
Old 06-08-2005, 10:41 PM
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I had heads that flow very similar to those. With a 90/90 1 7/8 lt's and everything else.... 238/242 xer 10.1/1 a4 c5 452 rwhp.

I switched to AFR/TEA stage III's.... 505 rwhp/473 rwt at 11.3/1
Old 06-09-2005, 08:06 AM
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Close to 30 or so, of that was from compression alone though, I'm already going to be at 11:1 with my TEA heads
Old 06-09-2005, 08:08 AM
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on a large motor like that id have them bumped to at least stage 2 or 3
Old 06-09-2005, 09:02 AM
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Originally Posted by Blue Falcon
Close to 30 or so, of that was from compression alone though, I'm already going to be at 11:1 with my TEA heads

I 2nd the compression ratio statement.
Old 06-09-2005, 09:37 AM
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Those heads would work ok but the problem is if you set up an engine to use them with the samll chamber then decide you want to go to a Stage 3 truck head or a 225 AFR head then you will not have enough compression with the larger chambers they come with.
Also our 5.3 heads ussually flow about 15-30cfm less than our stage 3 heads. This is especially evident in the midlifts numbers.
Old 06-10-2005, 10:32 AM
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Thanks Brent




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