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Valkyrie Riders Cruiser Club > General > 1500 Tech Board > Dyna 3000 with attic rat mods
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Author Topic: Dyna 3000 with attic rat mods  (Read 1202 times)
rocketray
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« on: October 07, 2019, 07:06:43 AM »
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..
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98valk
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South Jersey
« Reply #1 on: October 07, 2019, 07:49:42 AM »
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
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

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dago mooserider
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San Diego, CA
« Reply #2 on: October 07, 2019, 04:03:40 PM »
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.
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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
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« Reply #3 on: October 09, 2019, 04:13:39 AM »
I never said 12.5 to 1 compression
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The Attic Rat Performance Works
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