Gadgetized

iTrader: (9)

Well, I decided to see how the cylinder on a stock 6.0 bore matched my TSP PRC 2.5 truck heads. This is a pic inside the bore of a stock 6.0 cylinder looking at the bottom of the combustion chamber. Looks like I could remove quite a bit of material. Anybody done this? It also makes me think how close the intake valve was to the cylinder wall on my 5.3.

grey matter 04

iTrader: (9)

yep mine was part of the performance valve job i had done

Gadgetized

iTrader: (9)

Did you look at it from the inside of the cylinder like in my pic? Mine was CNC'd when I bought them.

grey matter 04

iTrader: (9)

no i didnt

Gadgetized

iTrader: (9)

I will take a better pic tonight of the head off the block. I scribed the outline of the cylinder.

Gadgetized

iTrader: (9)

From the side of the exhaust valve to the side of the CNC'd chamber it is .078". If I opened it up to the 4.030 bore it would be .138". The intake side would be .1575 if I opened it up to the 4.030 bore. I just think it could add a little more airflow. According to my math if I am doing it right, it would have only left .011 away from the stock 5.3 cylinder wall. I wonder if flowed on the stock 3.779 bore if the larger valve would even help.

TXsilverado

iTrader: (19)

i did it by picking up a set of trickflow 225's. it's a little more expensiveof a method.

Gadgetized

iTrader: (9)

I opened up the chambers to about the stock bore. I didn't finish it, just wanted it close. I will finish opening it up after the block is bored. It looked like it made quite a difference on the side of the exhaust valve.

grey matter 04

iTrader: (9)

why not pay a machine shop to do it?
Do you have a way of measureing cc of chambers?
using a dremel doing it your self will make every cylinder a different cc combustion chamber

Gadgetized

iTrader: (9)

Yes I can measure the CC's. Measuring CC's is not hard at all. I would rather do this work myself. There are certain things I like a machine shop to do like machining. I would rather do everything else myself.