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Old 01-21-2013, 06:37 PM   #28
Ford Assassin
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Join Date: Jun 2008
Location: Jackson, Ca.
Posts: 674
Re: Added a TVS 1900 Supercharger to my 5.3 Swap...

I finally hooked up a boost gauge on Saturday and much to my surprise I am making 10-11 psi when the kit is suppose to be 7 psi on a 5.3 litre.

So I borrowed a SnapOn scope from a buddy and took a look down a spark plug hole. Sure enough, flat top pistons and until at least 2007 no 5.3 had flat top pistons. So it looks like I have a 4.8 afterall.

Still making more than enough power so I am not too upset about it, don't have more than $200 in the long block anyway.
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