tfs cam swap 4.8
Feb 20, 2014 | 06:10 PM
#31
I would be willing to bet good money that you get the same highway mileage with 3.42s and 3.90s while getting better city mileage. It's the nature of the beast. You want to stay in vacuum vs building pressure in order to save fuel.
Feb 20, 2014 | 08:30 PM
#32
I never cared about mpg vs fun per mile. Lol.
Feb 21, 2014 | 09:25 AM
#34
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Does higher LSA say a 116 vs 112 create more vacuum, due to the cylinders are easier bled off?
Feb 21, 2014 | 02:49 PM
#35
Yeah I have do a lot of thinking on that part I found what I think is a 5.3 for $175. If I get the engine then I will 're ring and new bearings. So I'll have plenty of time know rush. And a little more power.
Feb 21, 2014 | 07:15 PM
#36
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Nice! yea the 5.3L will give you some extra tq. If your going to tear it down, then I would throw your 4.8L flat tops in it 
Non milled 61.15 heads/stock 0.051 gaskets with flat tops 10.4:1 compression
Milled 0.03 you will be right around 11:1
Non milled 61.15 heads/stock 0.051 gaskets with flat tops 10.4:1 compression
Milled 0.03 you will be right around 11:1
Feb 21, 2014 | 07:20 PM
#37
I would like to do that. I want to leave the truck running long as possible. So I don't have a lot of down time. I would like to find a set to buy. If anyone has any 4.8 flat tops. LET ME KNOW WILL BUY THEM.
Feb 21, 2014 | 08:49 PM
#38
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Oh I gotcha, yea then I would budget build the 5.3. Have the heads milled, maybe do a little diy port on the heads if you have experience or feel confident from research as another cheap/timely upgrade. Port the thorttle body leave the stock intake manifold, and with the cam, that's about all you can do to a n/a 5.3L on budget lol
Feb 21, 2014 | 08:52 PM
#39
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I would install procomp head studs if the motor is assembled on a stand. Little over kill but they are only $70 on ebay. If you have a 99-03 block you need the kit with 3 sizes of bolts, and if it is 05-07 you need the 2 piece kit. If it is an 04 block I can't help you haha b/c they split the style mid way through the year.
Feb 21, 2014 | 10:19 PM
#40
The block is suppose to be an 02. I'm at least going to DIY port the head and have them milled. I don't know if I'll try to port the t/b.
I see you have true duals. Do like them. Or would you do a 3" y pipe.
I see you have true duals. Do like them. Or would you do a 3" y pipe.