I used the 154-005 from summit was 155.70 with my TW HEADS
^^ I had an off color joke about mikes post but didn't want to make him "mad" and I do Fear the Wind so...
hell, I couldn't hurt him if I was standing in front of him.He can't hurt you over the net....let's hear it!
Joe
I was just getting ready to buy a set of valve springs and saw a spring shim kit as an option to add. Are extra shims added to increase pressure on the spring? With a gt40 setup are the shims necessary?
I bought the gt40 kit from Alex's parts. Up to .580 lift and the duration range was in the limits for tfs1 camI know it's kind of late so I'l try and get my thoughts together. First, the springs, retainers and locks, need to be a matched set and for the cam design you are using. The reason IMO to use shims is to achieve the proper spring height. You can use shims to increase the pressure but it will also reduce the amount of travel in the spring which can lead to binding sooner.. I think on a gt40 you are around 120 ish on the pressure for a mild cam.
TFS sells a complete kit that I used on my old GT40 heads that had everything needed.
http://www.trickflow.com/partdetail.asp?part=TFS-2500100&autoview=sku
What is the reasoning on the new head dowels? It's not like they are worn out, I never did this on any head replacement unless I lost them.No difference in left or right side. As stated READ THE DIRECTIONS Make sure you use new head dowels
Here's a good website on how to install them
How To Install Cylinder Heads on Small Block Ford 302 5.0 | GT40P Heads | 302 Budget Build | Building the Ford 5.0 302 on a budget
What is the reasoning on the new head dowels? It's not like they are worn out, I never did this on any head replacement unless I lost them.
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