TrickFlow heads. 2.05 or 2.08 intake valves.

[pittsburghracer]

Well I pretty much wasted a shop day measuring intake valves trying to locate and decide which valve size to go with. It’s a lot of extra work for little payoff on an Edelbrock head stepping up to a 2.08 valve and making it payoff but that’s starting with a 170cc head and hand porting to a 195cc runner. Now I’m at a advertised 190cc runner and I’m going to weld up the pushrod pinch to open it up some more. The biggest issue I found today is the TrickFlow head uses a valve that is .200 over an already .100 over length valve size on our Edelbrock heads. I guess maybe I will do some welding, grinding, and flow testing with one of my 2.05 Edelbrock valves and see where I’m at. Hmmm I’m working to hard at doing nothing.

 

[PRH]

The big plus in my book about the nice long valves in the TF’s is the heads facilitate a 2” installed height for decent roller springs.

 

[Bewy]

Will there be flow loss from shrouding from a bigger valve? Sometimes bigger valves in some engines become self defeating....

 

[RedB.]

Looking forward to the results of your hard work, hoping you post some pictures along with the results.
Will you need an offset rocker if you take away the pinch ?

 

[pittsburghracer]

Will there be flow loss from shrouding from a bigger valve? Sometimes bigger valves in some engines become self defeating....

My small block fixture on my flowbench measures 4.010 so I know that a 2.08 valve test good because I’ve been in the 320 plus cfm area with a 2.08 valve. I run my blocks at 4.030-4.040.

 

[345man2]

Look forward to the results you always have interesting and informative posts

 

[justinp61]

Start with a 2.05 and if you don’t like the numbers try a 2.08.

 

[73smallblock]

Watching this thread so I know what to do to my head's next year. Thanks John

 

[pittsburghracer]

Watching this thread so I know what to do to my head's next year. Thanks John

No problem guys. I enjoy it more than ever but I’ve gotten lazy over the last two years. Old age, Covid, 5 month infection, cold weather, out of shape, and to much phone time. Hopefully when this weather breaks I can go get a Cortisone shot in both knees so I can get walking and drop some weight. Pretty sure I found the 2.05 valves but I want to locate 2,08 valves before I go to crazy. I only want to buy one set as I can’t use them on anything else.

 

[K.O. SWINGER]

No problem guys. I enjoy it more than ever but I’ve gotten lazy over the last two years. Old age, Covid, 5 month infection, cold weather, out of shape, and to much phone time. Hopefully when this weather breaks I can go get a Cortisone shot in both knees so I can get walking and drop some weight. Pretty sure I found the 2.05 valves but I want to locate 2,08 valves before I go to crazy. I only want to buy one set as I can’t use them on anything else.

That's a lot going on! if I went through that I wouldn't worry about being lazy hell I'd be lucky to have enough energy to make my own dinner LOL