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Valve train for TC78 turbo on 383?

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Old Feb 3, 2011 | 12:49 AM
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LT1 POWR's Avatar
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Valve train for TC78 turbo on 383?

So I've got a forged 383 with brodix heads and a single plain intake shooting for around 9.2 compression ratio with a TC78. Where should I start as far as cam and springs for this thing? My rockers will be 1.65 crowers. The heads have 240 open 550 close .700 max lift springs installed right now and the motor has a blower cam with these specs duration 224.5/231.1 lift .557/.564 LSA 114.1. The heads flow 330/240 at .700. Will these springs/cam be OK or should I switch them out before installing? I've also got some (I think) comp 954's 195 open .690 max lift. I don't know how you can tell for sure though, without a valve spring tester. I know the cam is small, but would it be worth $300+ to switch it out to a more aggressive cam. I don't really have any hp or et goals. I just everything to work well together and be fun.
Old Feb 10, 2011 | 11:47 AM
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Re: Valve train for TC78 turbo on 383?

Travis,

I think the cam will be fine, but the springs that are already installed sound like overkill. The 195 open springs sound more reasonable. I am not an expert though, sop maybe posting in the engine tech section will help.
Old Feb 10, 2011 | 10:55 PM
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Re: Valve train for TC78 turbo on 383?

So someone wants to trade me a 230/236 on a 114 lsa cam for mine. Should I do it? I really have no idea how either cam will act, so anyone with some experience, please chime in.
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