Cams and stage 1??

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Mar 9, 2018 | 08:23 PM

#21

cody.a.e

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Joined: Dec 2017

Posts: 53

Likes: 4

From: Southern Maine

Quote:

Originally Posted by Brenschu

Okay cool thank you Cody, beside CP Carillo are there any other good companies to go with, tmann? I’m going to look into sending out the jugs

Tman is good, Wiseco is good. Just make sure you choose a piston with a dome volume that is going to help you achieve your target compression ratio. If you haven't already, check out the Big Boyz compression calculator. Mess around with it, get familiar with it. Everything that's going to effect your compression ratio is on there, meaning that all of those things are measurements you're gonna need to gather to predict what compression you'll be running. For that S&S 585 cam, the money spot is right around 10.6:1 static compression. To get the most out of any given cam on pump gas, you want to be at the highest compression you can without experiencing detonation (that's where a good tune comes in). In terms of cylinder pressure that loosely puts people somewhere between 190-210 psi on 91 or 93 octane. The reason the "magic number" for your static compression changes from cam to cam is because of the intake close angle, which very closely effects how much your corrected compression, and cylinder pressure is going to drop from static compression levels. If you haven't already, check out the Big Boyz compression calculator and become familiar with it if you want to piece together your own kit, and/or do the build yourself.

Personally I would choose a piston with a -1.6cc dome, and if you're going to have the heads done have them decked to an 83cc combustion chamber.

Mar 9, 2018 | 11:20 PM

#22

Dyna100

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Joined: Feb 2017

Posts: 361

Likes: 56

From: Lancaster, CA.

I have a 98" with ported heads, 10.5 compression and 585 cam. It runs great, but like everyone says,power comes on at about 3k.
I also have a 103" stage 1 motor with the Andrews 48.
They both have similiar HP/TQ numbers at 5k, but in my opinion, the 103 with the 48 is more fun to ride. The power down low really puts the smile on my face.

Mar 10, 2018 | 05:13 AM

#23

Brenschu

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Joined: Jul 2017

Posts: 24

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From: Middleboro

Ballot-boy when you said Kirby you meant Vee twin racing in Florida?

Quote:

Originally Posted by baloot-boy

You already have the rocker boxes off. Pull the heads and send out to Scott, Kirby, or any of the reputable builders here. And while you're at it, pull the cylinders and send them too to get bored to 107, then you can match 10.5-10.7:1 compression for the 585s and have a new monster.

Mar 10, 2018 | 11:45 AM

#24

djl

HDF Community Team

Joined: Jun 2006

Posts: 12,776

Likes: 2,607

From: san antonio

Quote:

Originally Posted by Brenschu

Ballot-boy when you said Kirby you meant Vee twin racing in Florida?

Kirby = Vee-Twin Racing, Deland, Florida.

Mar 11, 2018 | 08:13 AM

#25

jdw1

Road Captain

Joined: Apr 2014

Posts: 628

Likes: 129

From: Mn

So there two things here I’m confused about, maybe I missed something.

First off I’m under the impression he’s running a FP tuner, does it have the capabilities to manage this type of engine build?

Second, my understanding is he’s putting”Easy Start” cams into a bike that has ACR on the bike! It should be fine if you deactivate the ACR’s correct?

If you use the ES cams be carful you don’t adjust you push rods on the bump in the cams!

My apologies if I’m not understanding, maybe I shouldn’t have asked anything......