New posts

Reply to thread

Message

The specs for a std 79 Ironhead are 61 bhp at 6200rpm and 52 lb/ft torque at 3200. These numbers are as 'claimed' by HD. I believe these are at the crank. Knock off approx. 12 to 15% for rear wheel figures, and you get low 50's bhp. In std trim, an XL1000 was tested by cycle world with a max speed of 113mph, and did the quarter mile in 14.22sec (13.3sec with the muffler removed).

I expect the motor to be making around 60bhp at the rear wheel, with the big carb, electronic ignition and less restrictive exhaust. To gain another ten or so, It'll be getting PB+ cams (these will make a big difference), lightweight pushrods, mildly cleaned up heads and maybe a touch more compression. I wont be dragracing it, though I may take it to Pendine Sands next year. As for drag racing, we're building this...

URL=http://s1122.photobucket.com/user/Merch131ho/media/Compbike/ironhead42004.jpg.html][ATTACH=full]49992[/ATTACH][/URL]

<blockquote data-quote="Bevelheadmhr" data-source="post: 201999" data-attributes="member: 5032">The specs for a std 79 Ironhead are 61 bhp at 6200rpm and 52 lb/ft torque at 3200. These numbers are as &#039;claimed&#039; by HD. I believe these are at the crank. Knock off approx. 12 to 15% for rear wheel figures, and you get low 50&#039;s bhp. In std trim, an XL1000 was tested by cycle world with a max speed of 113mph, and did the quarter mile in 14.22sec&nbsp; (13.3sec with the muffler removed).I expect the motor to be making around 60bhp at the rear wheel, with the big carb, electronic ignition and less restrictive exhaust. To gain another ten or so, It&#039;ll be getting PB+ cams (these will make a big difference), lightweight pushrods, mildly cleaned up heads and maybe a touch more compression. I wont be dragracing it, though I may take it to Pendine Sands next year. As for drag racing, we&#039;re building this...URL=http://s1122.photobucket.com/user/Merch131ho/media/Compbike/ironhead42004.jpg.html][ATTACH=full]49992[/ATTACH][/URL]</blockquote>

[QUOTE="Bevelheadmhr, post: 201999, member: 5032"] The specs for a std 79 Ironhead are 61 bhp at 6200rpm and 52 lb/ft torque at 3200. These numbers are as 'claimed' by HD. I believe these are at the crank. Knock off approx. 12 to 15% for rear wheel figures, and you get low 50's bhp. In std trim, an XL1000 was tested by cycle world with a max speed of 113mph, and did the quarter mile in 14.22sec (13.3sec with the muffler removed). I expect the motor to be making around 60bhp at the rear wheel, with the big carb, electronic ignition and less restrictive exhaust. To gain another ten or so, It'll be getting PB+ cams (these will make a big difference), lightweight pushrods, mildly cleaned up heads and maybe a touch more compression. I wont be dragracing it, though I may take it to Pendine Sands next year. As for drag racing, we're building this... URL=http://s1122.photobucket.com/user/Merch131ho/media/Compbike/ironhead42004.jpg.html][ATTACH=full]49992[/ATTACH][/URL] [/QUOTE]

Verification