I have an opportunity to buy an Aluminum high compression head from a friend. We believe it came from Performance T- Parts in Dichinson TX. It looks just like a Z-Head to me but does not have a Z marking. It has the following identification cast on the head:" VTH 1000L 09-19 Made In USA "
Now to my question; what can anyone tell me about this type of head. Does it perform like a Z-Head? Compression ratio etc. Thanks, Joe
The Performance T Parts heads, made by Ralph Reeder, have a 4 where the Z head has a Z. I drove with one of those for thousands of miles, and they perform very similar to a Z head. I don't know anything about the VTH... markings.
If it is one of Ralph's heads it will say REEDER inside the water passage where the water outlet bolts on.
Ralph's heads work great, I have one on my '15. The compression is about 5 1/2 to 1, about 25% above factory stock.
Thanks Ralph and Mike for the info. I just came in from the shop and yes, it in fact does have REEDER inside the inlet. So good. I will put it on my '26 roadster that I'm restoring this winter. I do have Z-heads on both my '15 speedster and '15 touring which I am happy with so this REEDER head should be just fine. Joe
Check the head before you use it a while back I had one on my 1912 and the aluminum was not good it was a bad batch, leaked water into the pistons, turn it upside down plug the plug holes and fill chambers with paint reducer and see just to make sure before installing, Bob