Help: Heads for 117" build

[Bagger]

Post deleted as was a repost

[Don D]

Yes and no. Same number but what I have, one set only, are old stock and are 1.070 CH. Those new version is 1.086 CH and fine too but when using the S&S cylinders I start with the 124" cylinders that are 5.004" L and I cut them down. Its a lot of work to cut them and hone the unfinished cylinders but this is what I go through because I want them to seal and like using stock intake lengths. I do not care for the S&S Wiseco pistons with the 2mm oil ring and their honing lately has become less than good, sorry to say. Ring seal is important to have a long lived well functioning engine. The KB ring pack are wider and standard tension, they work well and last.

[Bagger]

Baisley heads don't come cheap. Have you considered custom pistons? Usually have to purchase 2 sets, so don't know what the cost comparison looks like. An option, maybe.

You're right, Baisley reworked heads can be pricey.

[Bagger]

Catalog shows -10.9cc. Maybe check with S&S to see that this is correct.


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I called S&S today.  Sales representative said the pistons are -10.9cc.

[Ohio HD]

Catalog shows -10.9cc. Maybe check with S&S to see that this is correct.


[attach=0,msg1364018]

I called S&S today.  Sales representative said the pistons are -10.9cc.

You might ask Randy if the CP Bullet series pistons have enough meat at the top to mill a shallow pocket to reduce compression. The Bullet series should have already -3.3cc for the large deep valve reliefs. A total of about -8.0cc should give you 10.52:1 compression with your 87.2cc heads and zero deck height. They have a 1.050" compression height, will allow use of S&S 4.878" cylinders.

[Don D]

Been there with CP pistons from randy. His shelf pistons don't have the needed thickness to get anywhere near -10cc. He could supply customs however.

[Bagger]

Dan Baisley told me it'd be wise to wait after heads are refreshed to know head cc's before buying pistons.

Axtell use to have a 117" kit with -10cc pistons, but no longer on their web site.
Randy Torgeson of Hyperformanc in Idaho bored my Axtell cylinders for my 107" and matched with CP pistons.  I called him today,  He said he'd get CP flat top pistons and machine them for desired -cc.

[Ohio HD]

Dan Baisley told me it'd be wise to wait after heads are refreshed to know head cc's before buying pistons.

Axtell use to have a 117" kit with -10cc pistons, but no longer on their web site.
Randy Torgeson of Hyperformanc in Idaho bored my Axtell cylinders for my 107" and matched with CP pistons.  I called him today,  He said he'd get CP flat top pistons and machine them for desired -cc.

   Randy has done the same for me.

Order the S&S cylinders unfinished and size them to the new pistons.

Dan is right, valves may end up a little deeper when finished.

[turboprop]

Dan Baisley told me it'd be wise to wait after heads are refreshed to know head cc's before buying pistons.

Axtell use to have a 117" kit with -10cc pistons, but no longer on their web site.
Randy Torgeson of Hyperformanc in Idaho bored my Axtell cylinders for my 107" and matched with CP pistons.  I called him today,  He said he'd get CP flat top pistons and machine them for desired -cc.

Have you considered having Baisley do the heads and the pistons? Seems like a no brainer to me instead of trying to piece meal it out all over the place. Baisley is the gold standard.

[Bagger]

Dan Baisley told me it'd be wise to wait after heads are refreshed to know head cc's before buying pistons.

Axtell use to have a 117" kit with -10cc pistons, but no longer on their web site.
Randy Torgeson of Hyperformanc in Idaho bored my Axtell cylinders for my 107" and matched with CP pistons.  I called him today,  He said he'd get CP flat top pistons and machine them for desired -cc.

   Randy has done the same for me.

Order the S&S cylinders unfinished and size them to the new pistons.

Dan is right, valves may end up a little deeper when finished.

That's what Randy said, he'd use S&S cylinders bored to match CP pistons. 

[BigT]

 Dan Baisley had did my heads for my 117" years ago using 20 degree reverse dome pistons. I ran it at 11.3:1 compression and never heard any type of engine ping running a carburetor. [attach=0]

[Bagger]

Dan Baisley had did my heads for my 117" years ago using 20 degree reverse dome pistons. I ran it at 11.3:1 compression and never heard any type of engine ping running a carburetor.

Thanks Big T, I do plan to talk Da Baisley about pistons.  I did speak with a rep from his shop today, who they have a local shop do their cylinders

[Tireman]

Dan Baisley told me it'd be wise to wait after heads are refreshed to know head cc's before buying pistons.

Axtell use to have a 117" kit with -10cc pistons, but no longer on their web site.
Randy Torgeson of Hyperformanc in Idaho bored my Axtell cylinders for my 107" and matched with CP pistons.  I called him today,  He said he'd get CP flat top pistons and machine them for desired -cc.

Have you considered having Baisley do the heads and the pistons? Seems like a no brainer to me instead of trying to piece meal it out all over the place. Baisley is the gold standard.

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