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New TEA 243 Heads

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Old Apr 6, 2009 | 04:25 PM
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Default New TEA 243 Heads

Finally took down my 243 Castings to TEA.
After talking with mike, we are going to do a Stage 2 CNC on the Heads and cut the chambers from 64cc to 61cc for a bit more compression.
Stock bottom end.
Stock Pistons.
Ls6 Intake
1.8 rockers
224/230 xfi/xer Cam
Stage 2 LS6 243 "Seasoned" heads
pacesetter long tube exaust, no cats, magnaflow muf
We are est 420 rear wheel HP, what do you guys think?
Flow Numbers:
0.100 67 54
0.200 139 120
0.300 219 179
0.400 271 224
0.500 308 248
0.550 315 255
0.600 320 260

Last edited by bigboykilroy; Apr 6, 2009 at 05:17 PM.
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Old Apr 6, 2009 | 04:29 PM
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Looks like a nice setup! The guys at TEA are very good!
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Old Apr 6, 2009 | 04:58 PM
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Those heads are great. Not sure about running 1:8 rockers with that cam though (do you mean xfi/xer lobes?), I don't think that's a good idea. I think you should stick to 1:7.
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Old Apr 6, 2009 | 05:10 PM
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Right now with the 1.8 rockers we got:
.615 Lift on the Intake and a PVC of .095
.626 Lift on the Exhaust and a PVC of .135
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Old Apr 6, 2009 | 08:44 PM
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what do most people find the optimum 243 cc chamber size to be, running 93+
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Old Apr 6, 2009 | 09:20 PM
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It's a lot more involved than just head chamber size!
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Old Apr 6, 2009 | 09:32 PM
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correct, but based on the info from above.
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Old Apr 6, 2009 | 09:38 PM
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LS1 cam vendors usually recommend 1.7 rockers for more agressive lobes like XER and XFI. I think 1.8 rockers are used on mild cams like stock.
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Old Apr 6, 2009 | 10:57 PM
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Originally Posted by bigboykilroy
correct, but based on the info from above.
Calculate DCR for a start. Acceptable range for 93 pump gas is around 8.5 to 1. Some even push it to 8.75 to 1!
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Old Apr 7, 2009 | 07:42 AM
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She should be at 11 to 1 compression, how will that stand up to 93+ on a LS1, I think she will be fine.....thoughts?

Last edited by bigboykilroy; Apr 7, 2009 at 11:14 AM.
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Old Apr 7, 2009 | 12:14 PM
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Originally Posted by bigboykilroy
She should be at 11 to 1 compression, how will that stand up to 93+ on a LS1, I think she will be fine.....thoughts?
That will be fine. Just keep the 93 in it. But, I'd reconsider those 1.8:1 rockers. That's a bit much with those lobes. Did you check for coil bind with that lift? Might want to verify the springs aren't at bind before you go much further.
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Old Apr 7, 2009 | 12:22 PM
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i run a similar set up on my girl friends trans am. comp 224/230 xer lobes on a 114 lsa. 58x 59x lift. patriot stage 2 ls6 style heads(59cc). very good runner and totally street friendly
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