EVO vs Twin Cam

[Pat Moweiny]

I'm building a nostalgic softail bobber and haven't decided on the motor yet. What are the pros and cons of the EVO vs Twin Cam?

[PC_Hater]

I'll go first...
'Nostalgia' means you won't be using a Twin Cam. Really you should be looking at Pan or Shovel, and if your wallet can stand it a Flathead Power Knucklehead.
If you want 100hp then use a Twin Cam.
The cam/pushrod/valve gear arrangement on an EVO is just wrong for revs and thus power. If that is not a problem, choose an EVO.
All motors be they HD, BMW or Kawasaki have their 'funny little ways' so in terms of reliability the EVO will do just as well as the Twin Cam.
Kickstart Twin Cams are few and far between. 'Nostalgia' means no electric start!
My final word is about vibration - use a 'B' Twin Cam with balance shafts if the vibes bother you.

[todd10]

Check out the engines @ Accurate Engineering & S&S

http://www.accurate-engineering.com/customengines.html

http://www.sscycle.com/product/Vintage/1936-1984-Big-Twin-Models/Engines-c172/

[chopper]

Between TC and EVO?
  I'd go with the EVO.  TC's pretty much HAVE to have electric start to spin fast enough to fire the electronics.  Which means way more wiring and components. You need starter, solenoid, ECM, etc.. and wiring.

Evo you can get a kicker, and very basic electrics.

Course....   Shovelheads are still easy and cheap to come by. A Shovel with a big honkin' mag hanging on the side looks pretty damn sweet!

[todd10]

One option to think of using a twin cam is the Vulcan ignition cam cover kit that is currently on sale for $639. This kit eliminates all of the sensors & normal ignition module under the right side cover. prodrag1320 has used these and can tell you all about them.

No:   microprocessor
        crank sensor
        cam angle sensor
        MAP sensor
        BAS sensor

http://vulcanworks.net/T-C-88-Ignition-Conversion-Kit-Chain-Drive-Cams-p-185.html

[Admiral Akbar]

Back to points?

        microprocessor  - must be points..

        crank sensor 
        cam angle sensor   Need one or the other or a point cam

       MAP sensor  Not needed but nice.

        BAS sensor  Not needed

You need only a cam sensor, crank sensor.. Pointless is better.. 

Map is nice if you got a small tank.. Should get you 3-8 mpg..

Max

[wurk_truk]

[prodrag1320]

we put one of these on the last 124" TC we did,put a dyna S ignition in it,worked out very well,

[Rusty Steel]

Well.. I guess Max doesn’t know everything! I have one of them Vulcan ignitions, on a 04 T.C. It’s an Evo style set up. You don’t need all the sensors. I do wish that I can figure out what tuner will work with it, as I’m getting ready to big bore it. I’ve got about 25K on it and I wish for more now.. I will add that their customer service REALLY sucks. Wont answer their phones, wont reply to E-mails, I even WROTE THEM, they don’t seem to care.. Nuff said… I feel better now.

[Admiral Akbar]

Well.. I guess Max doesn’t know everything!

You don’t need all the sensors.

I guess I don't what the heck do you think the ignition module is in the pick above??  Do you think it's got a sensor in it?  If you don't then you might want to think about it again..

BTW, I am wrong about 1 thing.. but because you'll probably never figure it out I'll tell you .. My bet is that the dyna S ignition don't have a microprocessor.  It's too dumb,, Needs a set of flyweights and rotor that that advances ignition as the result..

Now how the heck do you time that thing?? Where's the timing plug a TC?  All you need to run a DTT is a CPS.. And it will time based on CPS, don't need no friggen light..

What happens when the springs come loose?  Got a Sunnen Distributor tester?

Max

[Rusty Steel]

Lol, Max. Ain’t trying to bust you out. Its pretty much as wurk_truk displayed. They say in the instructions, that you ‘can’ drill n tap a hole like the Evo’s, if you happen to have the cases apart. Well if I pull the cases apart, I’m not staying with this ignition. The tuning device is as the “Crankshaft position tuning tool’. You stick that thing in where the crankshaft sensor would be, at a certain position of crankshaft rotation…bla bla bla..  It actually does work well, I just wish there was some kind of customer service. I need to know if I can adapt an after market tuning device to optimize their PRODUCT, but I guess they don’t really care.

[Rusty Steel]

Oh ya, just go to Vulcanworks.net.. you will see that it is not a spring set up.

[Admiral Akbar]

Oh ya, just go to Vulcanworks.net.. you will see that it is not a spring set up.

Where? do you mean here..

http://vulcanworks.net/store_4/product.php?productid=439&cat=25&page=1

They say

o Ignition Trigger, Rotor- For all Cone motors, Shovelheads, EVOs,  Sportster-Cone, and Twin-Cam Gear Drives

Max

[Rusty Steel]

Close... http://vulcanworks.net/store_4/product.php?productid=185&cat=25&page=1

[Admiral Akbar]

 

And you  the believe the advertising.. If not using a sensor then how the heck does it know when to fire the spark? Intuition?

It's got springs and a sensor.. Either that or springs and a set of points..

Max

[Rusty Steel]

Yup. Your right, I am wrong, have a great night!   

[Reddog74usa]

"If you want 100hp then use a Twin Cam.
The cam/pushrod/valve gear arrangement on an EVO is just wrong for revs and thus power. If that is not a problem, choose an EVO."


Yeah right, Theres a lot of Evo's makin the same or better per cubic inch as a TC just check the dyno section.As far as nostalgic it's your choice.

[kink04fxd]

I think this is gona get good.

[N-gin]

Well.. I guess Max doesn’t know everything!

You don’t need all the sensors.

I guess I don't what the heck do you think the ignition module is in the pick above??  Do you think it's got a sensor in it?  If you don't then you might want to think about it again..

BTW, I am wrong about 1 thing.. but because you'll probably never figure it out I'll tell you .. My bet is that the dyna S ignition don't have a microprocessor.  It's too dumb,, Needs a set of flyweights and rotor that that advances ignition as the result..

Now how the heck do you time that thing?? Where's the timing plug a TC?  All you need to run a DTT is a CPS.. And it will time based on CPS, don't need no friggen light..

What happens when the springs come loose?  Got a Sunnen Distributor tester?

Max