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grh222 · Aug 26th, 2009, 18:13

Hi Austen

If you haven't found out yet, the BTCC engines were developed at TWR by a guy called Charlie Bamber. He is currently MD of Menard Competition Technologies. The first BTCC engines produced about 260 bhp, but this guy altered the heads by machining the cam carriers off and remaking them as billet bolt on items, allowing the followers to be increased to 36mm dia so a more lift could be used on the cams, (about .825in on the inlet). The head face was also machined on the angle to alter the attitude of the ports to the chamber. (All of this was driven by the BTCC regs) . Using 13.5 :1 cr, this setup produced about 325 bhp.

Hope this is helpful. I'm not a Volvo engine expert, it's just coincidence that the story of the head is in this months Racecar engineering.

Looks like a great project - nice to see something other than Duratecs.

All the best

Graham Hill

Aug 26th, 2009, 18:13	#30
grh222 New Member Last Online: Aug 26th, 2009 18:15 Join Date: Aug 2009 Location: Warwickshire	Hi Austen If you haven't found out yet, the BTCC engines were developed at TWR by a guy called Charlie Bamber. He is currently MD of Menard Competition Technologies. The first BTCC engines produced about 260 bhp, but this guy altered the heads by machining the cam carriers off and remaking them as billet bolt on items, allowing the followers to be increased to 36mm dia so a more lift could be used on the cams, (about .825in on the inlet). The head face was also machined on the angle to alter the attitude of the ports to the chamber. (All of this was driven by the BTCC regs) . Using 13.5 :1 cr, this setup produced about 325 bhp. Hope this is helpful. I'm not a Volvo engine expert, it's just coincidence that the story of the head is in this months Racecar engineering. Looks like a great project - nice to see something other than Duratecs. All the best Graham Hill