Wiseco Pistons need 9cc dome volume

[Rugby_fxdwg]

Who makes a forged piston for a 95" twinky with ported heads with a 90cc volume. I wana run 10.1 compression for a woods 5-6 and looking for JE an any other manufacturer that has a volume between Wiseco's 14cc and their 4.6 cc.
I DO NOT WANT TO TAKE IT OFF THE HEADS, because that involves shipping again and down time....

[Jaycee1964]

Harley makes the 22868-01A Arias Forged that they claim are 10:5 to 1 with bathtub heads.  The volume on those are 7cc.   If you get the 22868-00 they are a 9cc dome.  Iv'e used these and you have to set them mid spec. to keep em quiet.  Don't go to the high end of the spec.  I had a set that was a bit noisy on the high end. 

[Hillside Motorcycle]

Who makes a forged piston for a 95" twinky with ported heads with a 90cc volume. I wana run 10.1 compression for a woods 5-6 and looking for JE an any other manufacturer that has a volume between Wiseco's 14cc and their 4.6 cc.
I DO NOT WANT TO TAKE IT OFF THE HEADS, because that involves shipping again and down time....

Our 98"ers have an 8.5 cc dome............and every 2.76 grams removed=1cc.
Scott

[Rusty Steel]

Yup, you can buy some Wiseco’s 14cc domes and have them cut to about 10cc, or call CP and order yourself some custom’s.. it’s not hard.
Good luck

[PanHeadRed]

JE 10.25's are 11

[Rollmeaway]

Harley makes the 22868-01A Arias Forged that they claim are 10:5 to 1 with bathtub heads.  The volume on those are 7cc.   If you get the 22868-00 they are a 9cc dome.  Iv'e used these and you have to set them mid spec. to keep em quiet.  Don't go to the high end of the spec.  I had a set that was a bit noisy on the high end.

I reasearched the 22868-00 quite extensively & I kept coming up with a 6 cc dome. I was also sent a file from HD that states if you use a stock head configuration which has a 85cc volume you will wind up with a 9.6:1 C/R

[Jaycee1964]

  Your right however a builder I was working with actually cc'd the domes on a few sets of the 22868-00 pistons and found the dome volume to actually be 9cc.  Harley realized the flaw sometime ago and came out with the 22868-00A piston which is a true 7cc dome.  The old 22868-00 are discontinued but you can still get a set "online only".  They are no long available thru Harley with a Harley tag.  Shave the head a bit to get the compression where you want it.

[Rollmeaway]

Harley makes the 22868-01A Arias Forged that they claim are 10:5 to 1 with bathtub heads.  The volume on those are 7cc.   If you get the 22868-00 they are a 9cc dome.  Iv'e used these and you have to set them mid spec. to keep em quiet.  Don't go to the high end of the spec.  I had a set that was a bit noisy on the high end.

I reasearched the 22868-00 quite extensively & I kept coming up with a 6 cc dome. I was also sent a file from HD that states if you use a stock head configuration which has a 85cc volume you will wind up with a 9.6:1 C/R

In error I typed 85cc instead of 86cc cylinder head volume, combined with a stock .050 OEM head gasket will give you a 9.6:1 which was done on Big Boyz calculator to confirm the value.

If what you are saying that the 22868-00 is actually a 9cc dome my calculations are going to be out the window cause I have the 22868-00 not the 22868-00A. Hmmmmm have to check things out.

Thanks for the Leg-up

[Rollmeaway]

Now here is some real reading as to what is what

http://harleytechtalk.com/htt/index.php?topic=1419.0

[jsachs1]

Harley makes the 22868-01A Arias Forged that they claim are 10:5 to 1 with bathtub heads.  The volume on those are 7cc.   If you get the 22868-00 they are a 9cc dome.  Iv'e used these and you have to set them mid spec. to keep em quiet.  Don't go to the high end of the spec.  I had a set that was a bit noisy on the high end.

I reasearched the 22868-00 quite extensively & I kept coming up with a 6 cc dome. I was also sent a file from HD that states if you use a stock head configuration which has a 85cc volume you will wind up with a 9.6:1 C/R

In error I typed 85cc instead of 86cc cylinder head volume, combined with a stock .050 OEM head gasket will give you a 9.6:1 which was done on Big Boyz calculator to confirm the value.

If what you are saying that the 22868-00 is actually a 9cc dome my calculations are going to be out the window cause I have the 22868-00 not the 22868-00A. Hmmmmm have to check things out.

Thanks for the Leg-up

22868-00 = 8 cc. 
22868-00A = 6 cc. 
You can BET that this is accurate.
John

[Jaycee1964]

I can only tell you what I found and my 22868-00 measured 9cc.  You may be better off cc'ing a set for your own comfort.  I ended at 10.25 to 1 with my 95 build.

[Rollmeaway]

22868-00 = 8 cc. 
22868-00A = 6 cc. 
You can BET that this is accurate.
John

I can only tell you what I found and my 22868-00 measured 9cc.  You may be better off cc'ing a set for your own comfort.  I ended at 10.25 to 1 with my 95 build.

Well here is the dilema

I have had my head done over top to bottom with a 85cc chamber,
I am going to be running a set of Andrews 37G with the S&S gears,
I have spent a chit loada time researching/getting it to where I am today & wanted to zero in on a 9.88:1 C/R by using a .040 HG.
Now the piston dome has increased from 6cc to 9cc which will put me at 10.2:1 with a corrected CC of 9.45:1 & a CCP of 197.2 which is alot higher than I wanted to be. Ahahahahahhaa oh its times like these that test a guys patience.

I guess my next question would be does anyone know for sure how many thou would have to be milled off the top to get it down to 9.8 from 10.2 or has anyone already done it. I dont want to end up with a pair of matching ash trays, I would rather sell the 00's & get the 00a's if its not feasible.

[Jaycee1964]

I'm wondering what the problem is with a high compression ratio?  It's not like your gonna be pushing things too far.  I'm sure you will enjoy the result much more than the lower ratio too.  I know you won't have issues pinging or detonation.. Just my 2 cents. 
If you must then by all means cc your current domes to be surs and mil if needed.  No biggie

[Jaycee1964]

And yes,  I have done it at 10.25 to 1 with those pistons, bathtub heads and woods 6 cams.  Ran like a bat outta hell.  No issues at all.

[PanHeadRed]

22868-00 = 8 cc.
22868-00A = 6 cc.

Yep. 

[PanHeadRed]

>does anyone know for sure how many thou would have to be milled off the top.

On the 88" style domes aprox .014" per cc

>Now the piston dome has increased from 6cc to 9cc<

No it didn't, it has always been 8cc.