Quick Question about PTV Clearance on my Set-up-
05-18-2008, 02:33 AM
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Quick Question about PTV Clearance on my Set-up- I curently have a TSP 233/239 .598/.603 112+2 LSA R2 Cam in my car, I am going to get some TSP Stg 2.5 5.3l heads (Might get the 317+ cfm "R" version) but need to know whats the LOWEST CC size and SMALLEST head gasket I can go with WITHOUT flycutting. 59cc w/ cometic .040. head gasket ok?? What will my DCR and SCR be at with that? I have moslty 91 octane in my area so keep that in mind, 93 is another 40 cents a gallon 
. Thanks guys.
. Thanks guys. 
05-18-2008, 04:34 AM
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Just the person I wanted to answer. I already have them cam but what you are saying is I cannot have the heads milled down or run .040 gaskets? Only GM MLS gaskets? Any idea what my compression ratio will be at?
05-18-2008, 04:41 AM
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05-18-2008, 04:42 AM
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Dont know man, its going to be the ones from TSP. I will try to find out real quick.....
***Edit- their website does not list it but I want to say they are a 62 or 64cc???
***Edit- their website does not list it but I want to say they are a 62 or 64cc???
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05-18-2008, 09:41 AM
#8
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that .2 increment in scr doesn't warrant the loss of PTV if you ask me and to get 11:1 you need 61.4cc chambers. Of course you can get the 5.3L with sunken valve, but that is another story, I'm not an advocate of those either.
05-19-2008, 09:00 AM
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Ok then, I will have TSP take them down to 62CC (or 61cc if I can even get away with that, I will ask them when I call) and use stock GM MLS gaskets. Now a quick question about pushrods, you were the one that told me to get 7.425's a while back for my cam only (and they worked GREAT, I have VERY LITTLE valvetrain noise), what size will I need now? 7.400's? Thanks again.
Last edited by LS1C5Vette; 05-19-2008 at 09:40 PM.
06-11-2008, 03:21 AM
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Tsp said I could PROB get away with a .010 mill on the 5.3l heads and a .040 gasket, does that sound right? That would kick *** if I could w/o flycutting.
06-12-2008, 09:34 AM
#17
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Mechanical overev has no safety.
I mean that you'll have enough PTV margin in case you encounter any anomaly in your valvetrain (valve float, for exemple) the piston has enough space to be forgiving.
I mean that you'll have enough PTV margin in case you encounter any anomaly in your valvetrain (valve float, for exemple) the piston has enough space to be forgiving.
06-14-2008, 08:35 AM
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Here is one for you, what about leaving the 5.3l heads the stock CC size (TSP said they would do a LIGHT mill just to make sure the surface is even) and running a Cometic .045 gasket?
