Unfortunately my engine became a V5 last race weekend- exhaust valve head broke off - time for rebuild! Some with long memories my remember me asking questions several years ago as I installed an Indy lights spec engine to replace the Cosworth DFV in my F1 type single seater for vintage racing - road racing. Non-turbo of course.
![F3k RH side May09.jpg F3k RH side May09.jpg](https://turbobuick-data.community.forum/attachments/140/140842-68fc2d6b4492e2856b1ff17c4dd66d82.jpg)
I'll probably have many questions as I get into this rebuild but as I review what parts I've got I have a starter question - T&D versus Jesel rockers? The car has been running with T&D with no problems and I have some spares but the spare heads I have have Jesel rockers. Anyone have any comments or recommendations for one versus the other? I don't consider the application extreme - only about 425 BHP and 7000 RPM max - and in the nature of road racing with a car only weighing about 1200# often in the 5-6000 RPM range.
Thx - Derek
![NJMP Oct2011.jpg NJMP Oct2011.jpg](https://turbobuick-data.community.forum/attachments/140/140841-ee99bded5b42a1e42c7754777b049d1c.jpg)
![F3k RH side May09.jpg F3k RH side May09.jpg](https://turbobuick-data.community.forum/attachments/140/140842-68fc2d6b4492e2856b1ff17c4dd66d82.jpg)
I'll probably have many questions as I get into this rebuild but as I review what parts I've got I have a starter question - T&D versus Jesel rockers? The car has been running with T&D with no problems and I have some spares but the spare heads I have have Jesel rockers. Anyone have any comments or recommendations for one versus the other? I don't consider the application extreme - only about 425 BHP and 7000 RPM max - and in the nature of road racing with a car only weighing about 1200# often in the 5-6000 RPM range.
Thx - Derek