What could i expect if ?
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Cruiser
Joined: Aug 2019
Posts: 109
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From: karlstad
What could i expect if ?
Hi i got a dyna -07 that i bought new then .First year i got big sucker ac and a TMAT for gas ." Promised myself NOT do anymore than that" ,Changed my mind this august ,got a andrews 48 cam and two weeks later S&S slipons, So , i can feel the taste of more power... if little is good , more is better?
Want to keep the good behavior on 3 hour trips at 2500-3000 rpm , but want more fun on twisty roads , now i`m wondering what i can expect if :
Keep my 48 ,do the heads 1,90 intake ,set comp. at 10,0 ?
Get a CR575 , heads , comp. 10,5 ?
Get a S&S 570 , heads , comp 11,0 ?
Maybe103 " when heads are off ?
Erik
Want to keep the good behavior on 3 hour trips at 2500-3000 rpm , but want more fun on twisty roads , now i`m wondering what i can expect if :
Keep my 48 ,do the heads 1,90 intake ,set comp. at 10,0 ?
Get a CR575 , heads , comp. 10,5 ?
Get a S&S 570 , heads , comp 11,0 ?
Maybe103 " when heads are off ?
Erik
HDF Community Team
Joined: Jun 2006
Posts: 12,774
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From: san antonio
Any of the above solutions will achieve the goal but based on your qualifying statement of "good behavior on 3 hour trips at 2500-3000 rpms boring to 103 and either of the first two would be winners.
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Cruiser
Joined: Aug 2019
Posts: 109
Likes: 16
From: karlstad
Will it be there be any problem width comp.? If i go for S&S ,easy start ? At S&S pdf. instructions they recommend up to 10,0for 570 ( 40degr. int. close) same for 583 (18 degr. int. close.) Cant understand that !
CR 575 vs. andr. 48 , Will i realy feel any diff. ?
CR 575 vs. andr. 48 , Will i realy feel any diff. ?
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
No problem with compression between 195-200psi but compression releases are necessary.
Your first option of retaining the 48 cams, the heads would need to be decked .010"-.015", with a .030" head gasket to keep CCP between 195-200psi. Static CR would be about 9.8; 10:1 would be pushing the envelope.
The 575 cam would require a .020" cut on the heads to keep CCP between 195-200psi; static CR would be 10.
You will feel a difference with headwork and more compression. The only difference in the options is the additional cost of the cams since you already have the 48. The Cyclerama and S&S cam option should make a bit more TQ than the 48, more HP and both will carry out a bit further than the 48.
A new dyno tune is required to get the most from the upgrades.
The S&S 570 would require a .030" cut on the heads to keep CCP between 195-200psi; static CR would be 10.2.
Get the picture?
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Cruiser
Joined: Aug 2019
Posts: 109
Likes: 16
From: karlstad
I almost decired to go for s&s 570 ,cruising highway can be boring anyway so i look for more fun using lower gears . 570 is not realy a high rpm choice , just compared to the 48 . Right ? 10,2 -10,5 comp
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Cruiser
Joined: Aug 2019
Posts: 109
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From: karlstad
Got my s&s 570 ,now to find pistons (103?) . Aim for 10,5 comp. 1,9 intake valves .
When i did cam change this aug. i didn`t remove gas tank . Is it necessary to remove it when doing heads and cylinders ? Anything els i should when i`m in there ?
Any guides that show how to remove TB ?
Erik
When i did cam change this aug. i didn`t remove gas tank . Is it necessary to remove it when doing heads and cylinders ? Anything els i should when i`m in there ?
Any guides that show how to remove TB ?
Erik
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From: Iowa
You will have to take the tank off to do the heads and cylinders. There is some beveling you can do to the breather holes in the rocker boxes and I'd put in the Rockout rocker inserts to help with top end noise.
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1/8" drill bit
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Also on amazon.com...
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