2V heads
Is it worth it to try and build a set of 2v heads? I.E. larger valves pedestal roller rockers... or just look for 4v quench heads
I was just about to ask this same question, I just ordered Tim's 400 pistons, and have a set of 4V' closed chamber heads just sitting there. I'm building a truck motor with those Track Boss pistons, a 270HR cam, and 3.73gears/33 tires. I'm wondering if it is worth the $$$ to mess with the 2v's, or simply upgrade springs on the 4V's and hope it doesn't hurt much on the bottom end. I hate to sink too much into 2V's, unless they are the best bet between the two.
Anyone?
We did many 2V head engines. They are not a bad head. I would not install big valves. A pair of 2V heads fixed up nicely can cost in the low $1,000. Much less if you want to install big valves & other mods. My opinion is to get a pair of Trick Flow 195CC heads for a little bit more. You would have an instant power gain.
I am trying to get a very nice quality import head brought in, but supply has been horrible, like almost everybody lately.
thanks thats what i was figuring. i got quench heads a cleveland i got in a mustang. 400 in a bronco what to make it a bit stouter, already did the cleveland pistons on inital rebuild over 15yrs ago truck sat for a log time had to redo most of the truck and now im wanting to redo the upper a bit more. already got edlebrock performer dual plane with 750 holley double pumper. dont remember the cam but i think its to big for the heads... valve float
Tim- I've heard about "2 piece" valves, and a few horror stories about 2v heads dropping valves due to their keeper design. If I was going to move forward with my 2v heads, will I need to replace all the valves, retainers and keepers even on a pretty mild build (truck motor)? Just looking to build it right without going overboard.
New valves are pretty economical. I think we sell all (16) for about $100. Depending on the year of the heads, you want to convert from a multi-groove valve anyway. Depending on the springs you are going to use, you maybe changing retained also.
Okay- I'm running the Comp Cams 270HR. 215/215 at .566. I was planning on running the recommended spring by Camp Cams. Let me know if new retainers are in order. Last thing: The lower cost valves are out of stock...any idea when they might be shipping?
Best to get retainers with the springs from Comp. We have plenty of valves on hand, I made the adjustment.
Sorry- one more post on this thread re:2V heads. The machine shop received the positive seals and valves today, thank you! I'm running the heads down to them this weekend. Before I drop them off, I thought about at least porting the exhaust side, nothing radical just a port match and cleaning off the flashing/casting. One area specifically is the roof of this pair. There is some kind of appendage hanging down on the roof of the exhaust chambers, about halfway past the guide on the way out of the chamber. I can't imagine a useful purpose for it. Can I trim that down or eliminate it safely?