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Can I use those N2O heads on my FI 408ci shortblock ?

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Old 04-05-2012, 11:58 AM
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Staging Lane
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Default Can I use those N2O heads on my FI 408ci shortblock ?

I have new TEA/TFS 235cc that was setup for nitrous and I would like to use them in my boosted motor ..

- Milled to 66cc
- Some chamber work for better timing
- Lightweight LS3 valves turned down
- Modified exhaust valves for 50 degree seat
- N2O Exhaust port
- Powder metal guides to use stock rockers with comp turnion kit

What do you think ? lightweight valves are an issue ? N2O exhaust ports ?
Old 04-05-2012, 12:55 PM
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I don't see a problem there since many are using ls3/ls9/lsa heads on boosted application, all of those heads have light weight valves (I think). I see a problem there if the one who did the work doesn't know his **** in cylinder heads work.
Old 04-05-2012, 01:11 PM
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See if you can find a compression calculator. It is ideal to keep it below 10 to 1 ratio. Many run closer to 9 to 1 with boost
Old 04-05-2012, 01:54 PM
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I did my homework with piston to set the compression ratio around 9.5:1 SCR with 66cc heads, but I'm asking if light weight valve will be an issue or not as well as N2O exhaust port option in the heads
Old 04-05-2012, 03:03 PM
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Originally Posted by Cold Zero
I don't see a problem there since many are using ls3/ls9/lsa heads on boosted application, all of those heads have light weight valves (I think). I see a problem there if the one who did the work doesn't know his **** in cylinder heads work.
I know you told me that before over FB ..

I would like to hear more opinions
Old 04-06-2012, 03:04 AM
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Any thoughts ???
Old 04-06-2012, 10:15 AM
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They will be fine.



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