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CVO Technical => Twin Cam => Topic started by: Socalshocker on September 08, 2018, 01:13:22 AM

Title: Pistons for a 103 stroker CVO
Post by: Socalshocker on September 08, 2018, 01:13:22 AM
Does anyone have a good supplier for a set of 10.5:1 pistons for a 2006 stroker CVO Softail motor? Maybe a supplier that will sell to people that live in the blue state of California? I'm having a hell of a time putting parts together for this build.  And better, do you know of a place where I can push that to a 3.937" Bore 10.5:1 set of pistons?? Many thanks in advance!
Title: Re: Pistons for a 103 stroker CVO
Post by: prodrag1320 on September 08, 2018, 07:06:20 AM
when you say stroker,what stroke are we talking about? I can get you just about any piston kit you would need
Title: Re: Pistons for a 103 stroker CVO
Post by: TorqueInc on September 08, 2018, 07:13:42 AM
Does anyone have a good supplier for a set of 10.5:1 pistons for a 2006 stroker CVO Softail motor? Maybe a supplier that will sell to people that live in the blue state of California? I'm having a hell of a time putting parts together for this build.  And better, do you know of a place where I can push that to a 3.937" Bore 10.5:1 set of pistons?? Many thanks in advance!

Those I'd have made to spec....I don't go over 3.915 bore
In any compression ratio
Title: Re: Pistons for a 103 stroker CVO
Post by: DCFIREMANN on September 08, 2018, 08:10:17 AM
I sent you a PM. I have everything you need.

Be Safe

THE DAWG
Title: Re: Pistons for a 103 stroker CVO
Post by: HD Street Performance on September 08, 2018, 08:54:52 AM
https://ariaspistons.com/products/twin-cam-88-1999-2006-103-ci-3-885-10-5-1
Title: Re: Pistons for a 103 stroker CVO
Post by: Socalshocker on September 08, 2018, 08:11:25 PM
It has a Bore of 3.875" and a 4.375" Stroke. Im not sure if this is the same as the newer 103 motors or not. It is a 2006 CVO Screamin Eagle.
Title: Re: Pistons for a 103 stroker CVO
Post by: Socalshocker on September 08, 2018, 08:15:33 PM
https://ariaspistons.com/products/twin-cam-88-1999-2006-103-ci-3-885-10-5-1

Are you guys a machine shop, if so what area. and what is the cost on these pistons and are you selling a ring kit with it? Sorry about the long compound sentence.  :cucumber:
Title: Re: Pistons for a 103 stroker CVO
Post by: prodrag1320 on September 09, 2018, 09:48:40 AM
we can get you a CP piston kit,PM me
Title: Re: Pistons for a 103 stroker CVO
Post by: johnsachs on September 09, 2018, 07:14:54 PM
The pistons for an early CVO SE 103, are completely different than the later 07' and up 103" engines. The earlier CVO SE 103" engines had hemi style heads, and larger valves. The later 103" flat top pistons won't work either, because of the valve pockets, and wrist pin bosses.
What cams are you planning on using ?
John
Title: Re: Pistons for a 103 stroker CVO
Post by: HD Street Performance on September 10, 2018, 12:41:04 PM
You can buy the pistons from Arias / CP. I bore and torque plate hone. They are the OEM supplied to Harley back in the day for the cvo 103, and again Sachs hits the nail on the head
Title: Re: Pistons for a 103 stroker CVO
Post by: Socalshocker on September 11, 2018, 08:21:09 PM
Thanks for the replies guys. I  am going with a Woods TW-5G cams. It's a big heavy beast of a chopper and I don't need a lot of top end on this bike.
Title: Re: Pistons for a 103 stroker CVO
Post by: CAR GUY on September 12, 2018, 05:09:27 PM
Question please. Would the 3.937 piston need to be domed, in order to get to 10:1 compression, using the original CVO script heads (approx 95cc chamber)? If so. How much dome would be required? i have been kicking around this 103 to 107 move for awhile. Thank you!
Title: Re: Pistons for a 103 stroker CVO
Post by: johnsachs on September 12, 2018, 06:25:32 PM
Question please. Would the 3.937 piston need to be domed, in order to get to 10:1 compression, using the original CVO script heads (approx 95cc chamber)? If so. How much dome would be required? i have been kicking around this 103 to 107 move for awhile. Thank you!
Need to know what cam you have in mind to answer your question. I did a 106 several months ago for a member of this forum with the CVO hemi heads, and flat top pistons. Made 122 h.p. Dyno sheet is on this forum.
John
Title: Re: Pistons for a 103 stroker CVO
Post by: CAR GUY on September 12, 2018, 06:33:46 PM
current cam Redshift 575 conversion.
Title: Re: Pistons for a 103 stroker CVO
Post by: Socalshocker on September 12, 2018, 10:13:40 PM
current cam Redshift 575 conversion.

They say good things about this cam and I was going this direction originally but they don't sell to people that live in Califonia  >:(
Title: Re: Pistons for a 103 stroker CVO
Post by: HD Street Performance on September 13, 2018, 06:15:09 PM
Question please. Would the 3.937 piston need to be domed, in order to get to 10:1 compression, using the original CVO script heads (approx 95cc chamber)? If so. How much dome would be required? i have been kicking around this 103 to 107 move for awhile. Thank you!
To match the chamber at 107" would take a custom dome to get the thing working right or a flat top and milling to give the hemi chamber s perimeter squish area
Title: Re: Pistons for a 103 stroker CVO
Post by: MCE on September 13, 2018, 07:23:10 PM
Allot of guys I've been working with are opting for the 110 kit and the more traditional "bath tub" head.
Find a set of silver -06 heads (plentiful), machine them for ACRs and Bob's ur uncle!

127-130 squared is pretty common using a 590 Tman cam set or something similar and a decent pipe. Don't
be afraid to ditch the 103 CVO heads! Finding pistons for them is a pain in the butt. Get rid of them and piston
choice becomes a non issue.
Title: Re: Pistons for a 103 stroker CVO
Post by: CAR GUY on September 14, 2018, 10:22:23 AM
HD Street Performance. Would the Arias piston at 3.937 work? Description reads for HTTC / CVO HEADS 99-06. 
https://ariaspistons.com/products/twin-cam-88-1999-2006-103-ci-3-885-10-5-1  Is that a recessed dome piston? Thank you for the information!
Title: Re: Pistons for a 103 stroker CVO
Post by: HD Street Performance on September 14, 2018, 04:35:09 PM
Yes of course and that would be expensive, custom, require 4 made, or pay some more premiums.
Title: Re: Pistons for a 103 stroker CVO
Post by: CAR GUY on September 14, 2018, 04:48:00 PM
Elmer said $400 for both pistons rings clips pins etc. Is that high $ i really don't know.
Title: Re: Pistons for a 103 stroker CVO
Post by: HD Street Performance on September 15, 2018, 10:05:18 AM
Nope good deal. Glad he is still there after CP bought them