I haven't posted a lot on the subject, but back in April 2019 I replaced my stock heads due to a crack between the valves (typical VW crack). After a lot of research and consideration, I decided on the MOFOCO 041 heads. I was mainly attracted by how there is still a bit of meat between the valves: The intake valve is larger at 39 mm, but the exhaust valve remains 32mm.
After ~50 hours, I am very pleased with the results. Three oil changes, and four valve adjustments later (Installation, 5 hours, 25 hours, and 50 hours), the valves haven't moved very much, hardly at all in fact. Generally about 5 of them don't even need touched, and the remaining 3 are so minimal that you could almost get away with leaving them alone. This is in contrast to my stock Revmaster heads that needed a decent amount of valve adjusting every oil change. Performance wise, I've been impressed as well. I kept my compression ratio the same at 8:1, and while there is not a "night and day" difference from the stock heads, there is just enough that I can feel the engine spinning with a little more power and "UMPH" than before. My rate of climb has increased slightly as well. Another thing I enjoy is the spark plug configuration: No longer do I have to remove the whole valve cover to access the lower plugs such as on the Revmaster heads. Cooling is definitely one area that the head could be improved on; there isn't a lot of room for airflow between the fins (Mark Langford, you addressed this in your post about your VW engine). That said, CHT wise it is no worse than my stock heads were. I average about 375-400F on takeoff/climbout and about 325-350 in cruise (all within the Revmaster limits). This was in the 90+F heat in Mississippi. My CHT probe is on the head flange, not under the spark plug. In short, temperature wise, there was no upgrade/downgrade when compared to stock. I say this next segment with caution, as I realize I opened up a can of worms, open for debate, but all in all, I feel the MOFOCO 041 heads are a decent candidate for anybody who wants/has to replace their stock VW heads. I don't know if they fare as well as the CB044s or the REV049s (both of which I haven't operated), but for the price I paid and the slight performance gain I've gotten, to me they are worth every penny. I paid just under $800 (90.5/92mm, dual plugs, and shipping). If you got this far, thank you for reading. I only posted this because I have gotten the feeling there is some skepticism on MOFOCO in the VW community. To those who have been curious or interested in their products, so far I have had good results. _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
