Andrews 21 with 10.25:1 - too much compression?
#1
Andrews 21 with 10.25:1 - too much compression?
Current setup on my 2006 Dyna:
95" Big bore with 10.25:1 SE cast pistons
0045" head gasket
Andrews 37s with +4° sprocket
Python 2-1 with very modded baffle
Thundermax with autotune
Bike runs great, but does not do what I want. The motor rips and popping the wheel powershifting is not a problem, but the power comes on later than I want.
I have the 30T sprocket and that helped some, but still not what I want.
I am basically using my bike to haul my wife (and now our dog) and I want low end power. My bike feels high strung and is a blast to rip around on, but when we ride 2 up it is hard to keep it smooth...does that make sense?
Can I run the Andrews 21 cam or does my setup have too much compression for that cam to work well?
I just did a 95", .030 head gasket with 9.45:1 and Andrews 26s for my brother and it is a really nice motor...more what I want out of mine. 55mph roll-on and bikes were pretty even for a couple seconds then I started to pull from him.
This got me thinking that 21s would be more for what I want to do.
Any thoughts?
95" Big bore with 10.25:1 SE cast pistons
0045" head gasket
Andrews 37s with +4° sprocket
Python 2-1 with very modded baffle
Thundermax with autotune
Bike runs great, but does not do what I want. The motor rips and popping the wheel powershifting is not a problem, but the power comes on later than I want.
I have the 30T sprocket and that helped some, but still not what I want.
I am basically using my bike to haul my wife (and now our dog) and I want low end power. My bike feels high strung and is a blast to rip around on, but when we ride 2 up it is hard to keep it smooth...does that make sense?
Can I run the Andrews 21 cam or does my setup have too much compression for that cam to work well?
I just did a 95", .030 head gasket with 9.45:1 and Andrews 26s for my brother and it is a really nice motor...more what I want out of mine. 55mph roll-on and bikes were pretty even for a couple seconds then I started to pull from him.
This got me thinking that 21s would be more for what I want to do.
Any thoughts?
#2
Waaaaaaaaaaaaay too much squeeze for that little 21.
9.4-9.5 tops.
A Wood 6 is almost spot-on for that compression at 10.25.
Scott
9.4-9.5 tops.
A Wood 6 is almost spot-on for that compression at 10.25.
Scott
__________________
HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
#4
#6
#7
I could put the adjustables back in but wondering if totally necessary. I guess it wouldn't be a bad thing to be able to load the lifters. I just read the horror stories about the nuts loosening up.
Was trying to hunt down what I thought was excessive valvetrain noise with the 37s...didn't seem any more or less with either pushrod type.
Would it help noise to put stiffer springs in it...if possible to do without removing heads?
Thanks again Scott for the help...always glad to read any advice given!
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