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Dyna 3000 with attic rat mods

Started by rocketray, Mon 07, Oct 2019, 09:06:43

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rocketray

Mon 07, Oct 2019, 09:06:43
I rode the scooter to Tulsa Saturday for his mods---milling the heads raises the compression ratio from 9.6 to1 to 12.5 to 1 ! Premium fuel only!...maybe airplane gas...Now I can see why I need to find the original black box..

98valk

#1
Mon 07, Oct 2019, 09:49:42
research how aluminum heads can tolerate more compression due to greater heat dispersion of the aluminum.

last time anybody wrote about AR mods and resulting compression it was only 11 to 1, interesting it is now 12.5.

good luck
1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798

dago mooserider

#2
Mon 07, Oct 2019, 18:03:40
I'm pretty sure it's not 12.5:1. That is really high.

Attic rat mods are designed to keep Honda level reliability.  11:1 sounds more like it to me.
98 valk, 2000 valk, 04 gsxr 750, 85 atc250r, 88 trx250r, 97 expedition (it's indestructible!), 12 civic si, 16 acura tlx, 18 f150.

Attic Rat

#3
Wed 09, Oct 2019, 06:13:39
I never said 12.5 to 1 compression
The Attic Rat Performance Works
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