Empecé a investigar y en la mayoría de foros afirmaban que el EV27 era el mejor árbol para un EVO sin modificaciones. Sin modificaciones me refiero a poder utilizar los mismos empujadores y los mismos muelles de válvulas. La moto la tengo con encendido electrónico Single Fire, un S&S Super E y escapes....
De nada :contento:
Ya contaba con que tenías hechas las modificaciones de encendido y demás que comentas.
Como te comentaba y pone en la información que te envié, no es que uno sea mejor que el otro. Con cualquiera de los dos vas a mejorar el rendimiento comparándolo con el de serie, lo importante a la hora de elegir uno u otro es el tipo de conducción que vayas a tener tú.
El EV-27 se beneficiaría de un aumento de la compresión para funcionar de la forma para la que fué diseñado, pero igualmente se notará cambio si no se hace este paso.
Resumiendo, el EV-13 tiene algo más de fuerza en bajos y el EV-27 en altos, independientemente de si es touring o no (aunque he comprobado que el EV-13 "corre que se las pela" :lengua_fuera
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Saludos y ¡suerte con la "operación"!
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Añado información aquí por si le interesa a alguien (no sé si se pueden "linkear" otros foros, si no lo borro)
Re: EV-13 cam.....opinions?
As long as we're bringing up Joe Minton, he is on record stating his EV13 is a better cam than the EV23, and he would recommend his JM20 over the TW21 if it was still available. Joe is the guy who came up with Mikuni's old "Pass a Truck" cam and carb combo, the Mikuni 42 with the Andrews EV13. This was done after people found out that Harley's cams were all top end, requiring a lot of revs and downshifting to get any power out of them. That wasn't what bagger pilots wanted. They wanted power for a loaded bagger out on the highway without having to shift down to third gear to get by an 18 wheeler. And that's why the 13 was developed. But it's not just for baggers. It's for anyone that wants that easy to access down low power.
Also,
there is a substantial difference between the EV13 and the EV27. You don't get "on the cam" with the EV27 til you're going 70mph in top gear. EV13 comes on substantially sooner and is a much more pleasant cam in all but out and out racing situations. You're "on the cam" with the EV13 a lot more of the time in the rpm range the average guy spends most of his time in.
I have an EV13 in my FXRS and find it is perfect for how I ride. I never race anyone, but when I need to get on it for one reason or another, the power comes on in a big hurry. In fact, sometimes I get surprised by how fast the bike wants to get out ahead of me. The EV13 has not hurt my fuel mileage. I average 47-51mpg, and that might be a little better than stock. I do not notice any additional valvetrain noise, as many do with the EV27.
I'm not knocking the EV27. It's a great cam for the way a lot of guys ride. But it's not for everyone.
http://harleytechtalk.org/htt/index....c,23410.0.html
The EV-13 is one of the best cam choices for a Touring bike. It produces the Torque in the RPM ranges that Touring bikes generally see most of the time including carring heavier loads, 2 up ridding, luggage, trailer, side car. Not to many riders that have Touring bikes Hot Rod them around town. The lighter bikes usually fit the bill for that. The EV-27 or larger cam would be better suited for that type of riding were higher RPM horsepower is needed. The EV-13 pulls great off the line, on hills and passing on the highway. If you like to chug along and the RPMs generally never see anything higher than 4500 then the EV-13 is the one to go with. It's quieter than the EV-27 because of the ramp design.
Ideally the EV-27 needs a compression bump in order for it to perform the way it's designed. Without it it still has a lot of bang for the buck, that's why it's liked so much. If you had 2 identical bikes, each one with one of these cams the EV-13 would pull a little harder on the low end then the EV-27. The the EV-27 would pull harder on the top end like at highway speeds 75+. Decide on your riding style and choose whats right for you.
Generally with any cam change, intake (air and fuel) have to be increase to benefit from the higher valve lift and duration. Same goes for the exhaust, it has to have less restriction. The motor needs to breath. This is how the cam increases performance. A bolt in cam means there is no major mods needed to install it like head work, pistons, ignition, etc. You will need to make some adjustments in order for it to perform correctly.
My bike when stock with just a K&N filter, and Samson Silver Bullet exhaust needed a jet increase from 42 pilot to 45 and a 160 to a 185 high speed jet. This was done through some testing to find the best plug readings and most pulling power. With a smaller high speed jet the bike wouldn't pull any more. Now it keeps pulling and and the plugs look perfect.
One more thing just for a comparison, with the lower gearing of a Touring bike and a EV-13 cam, it can pull away from a Softail with a EV-27. The Softail will have to down shift to a lower gear to catch up providing all other things are equal like compression, heads, etc.
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As long as we're bringing up Joe Minton, he is on record stating his EV13 is a better cam than the EV23, and he would recommend his JM20 over the TW21 if it was still available. Joe is the guy who came up with Mikuni's old "Pass a Truck" cam and carb combo, the Mikuni 42 with the Andrews EV13. This was done after people found out that Harley's cams were all top end, requiring a lot of revs and downshifting to get any power out of them. That wasn't what bagger pilots wanted. They wanted power for a loaded bagger out on the highway without having to shift down to third gear to get by an 18 wheeler. And that's why the 13 was developed. But it's not just for baggers. It's for anyone that wants that easy to access down low power.
Also,
there is a substantial difference between the EV13 and the EV27. You don't get "on the cam" with the EV27 til you're going 70mph in top gear. EV13 comes on substantially sooner and is a much more pleasant cam in all but out and out racing situations. You're "on the cam" with the EV13 a lot more of the time in the rpm range the average guy spends most of his time in.
I have an EV13 in my FXRS and find it is perfect for how I ride. I never race anyone, but when I need to get on it for one reason or another, the power comes on in a big hurry. In fact, sometimes I get surprised by how fast the bike wants to get out ahead of me. The EV13 has not hurt my fuel mileage. I average 47-51mpg, and that might be a little better than stock. I do not notice any additional valvetrain noise, as many do with the EV27.
I'm not knocking the EV27. It's a great cam for the way a lot of guys ride. But it's not for everyone.