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Motorcycle Book Store > Motorcycle books beginning with D
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Donnys Unauthorized Technical Guide to Harley Davidson 1936-2008: Volume I: The Twin Cam |
Author: Donny Petersen
Published: 2007-10-29 |
List price: $27.95
Our price: $25.15
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As of: August 28th, 2008 09:15:52 PM
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Customer comments on this selection.
 excellent twin cam info
This book has excellent info for the ones who have not kept up with all of the changes in the current "Twin Cam" harley engine. Very detailed and concise.
Yoda Speaks
Anyone that has been sucked into the Harley mystique and owns one of these expensive power mills owes it to themselves to read anything and everything by Harley Technical writer, Donny Petersen. Donny is the Jedi Master of Harley Davidson power trains. Donny's monthly tech articles for the extremely popular AMERICAN IRON magazine are indispensable guides for Modern Harley owners and mechanics. His articles are the primary reason I own a subscription to the magazine. I've learned a lot about Harleys from this man. His technical writing is brilliantly comprehensive to the expert and the layman. Donny is an invaluable teacher and second to none.
This volume contains articles about the Modern Twin Cams (1999 to the present). I suspect this series is going backwards in time if it is the first in a 12 volume set. What's covered in this volume is the introduction of the Twin Cam engine in late 1998, early Twin Cam problems, timing chest and gears, the history of Harley oil leaks, air flow problems, modifying Twin Cams into older frames, the clunky (my words) new 6 speed tranny, and the introduction of the 2007 96ci engine. My guess is that subsequent volumes will contain more indepth articles on the Twin Cam 88, 96, and 110 CVOs, while regressing to the earlier engine designs.
Here's hoping that Donny covers the entire gamut of Harley engine evolution going back to EVOs, Shovels, Panheads, and Knuckleheads. (Starting with the 1936 Knucklehead means there will be no coverage on the 1909-1936 Flathead.) Even though I don't own any of these older mills, I'll surely purchase every volume. Donny makes reading the history of Harley engine design fascinating, to say the least. And must own reading for owners of these older engine designs.
My only complaint with Donny is that I think he's a little too forgiving of the new '07 and '08 EPA induced Harley design. These closed loop engines run far too hot and lean for an air cooled motor. IMHO, unmodified engine longevity and performance has got to be a serious issue with the newer Harleys. Donny has touched on the future of the Twin Cam due to overwhelming EPA constraints and the possible death of the Harley air cooled mystique. It could spell the end of the Classic Harley Davidson look. (I know there are some bearded diehard enthusiasts that are frowning right now. Man, I feel your pain. I have a little tear in my eye too.) Things are changing. The future is the water cooled design of the Harley V-Rod. If you own an '07 or '08 Twin Cam, you owe it to yourself to do some online research into overheating, "parade mode", and the O2 sensors. As far as I know, Donny has not mentioned the "wideband" O2 sensors fix for reducing the lean condition of these motors in any of his tech articles for AMERICAN IRON. I could be wrong, having possibly missed it or skimmed over it. And an investment into an oil cooler is a must. I did some online research into this for two of my friends that own '07 TC96s. And I have to say, I'm just grateful that I own an '06 TC88.
Other than this minor quibble, this is the man to read when it comes to understanding Harley power trains. If waiting to buy 12 volumes of tech articles is a little daunting, a subscription to AMERICAN IRON is in order. If for no other reason than to get Donny Petersen's tech articles. (Sorry Genevieve, but AMERICAN IRON needs more swimsuit models posing with the customs. Just a suggestion, Chris.)
Thanks, Donny. Keep up the great work. I always look forward to reading your knowledgeable articles.
ENJOY.
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