It seems that the more people I talk to the more confused I get! I'm trying to decide on a cam for my 92 EVO rebuild and everytime I believe I have one picked out...............some tells me DON'T GO WITH THAT CAM! It's not going to work properly?
So I AM going with Wiseco 10:1 .020 over pistons and had decided (after TONS of research) to go with the EV27 but have recently been told that it is NOT enough to let the 10:1 compression pistons breathe properly and I will have problems if I run it. ARRRUGH
The guy I was speaking to said IF I didn't believe him to call Andrews directly and they would tell me the same thing.
His recommendation is a cam I've never heard of: a Leineweber E3S?? I see that the lift and duration are a bit higher and @ .020 and .053 compaired to just .053. as other cams list.
I WAS going with the VThunder 3020 before that, and the Woods W6 before that!!
WILL IT EVER END?
I know EVERYONE has an opinion on what THEY think will work and they are all different...............how do I make the right choice?

 

Jeff,
Everyone on this site has their favorite cam for their favorite build. That being said, you should educate your self. Send an E-mail to the manufacture that you think you might want to use and tell them what your setup, riding style,etc is. Then they will use their years of cam specific experience to suggest a cam for you. Most cam grinders come up with variants of their tried and proven grinds that may not have even been suggested yet. That way you can get the best cam and valve train for your particular build.
The best running engines are ones that were built with a complete set of compatable parts, rather than one that was built with the "Best parts". Hope this helps, if you have any questions please feel free to send me a message with your phone number and we can talk.

 

I have almost the same build and been running an EV3 with great results for almost 20 years. Pulls strong up to 6500 rpm.

 

Only listen to people who have something to lose if they give bad advice. Somebody at Andrews, for instance. I've found their tech support to be very knowledgeable and helpful.

 

I put an EV27 into a Dyna along with 10.5:1 KB pistons, SE ign module a K&N filter, Mikuni HSR42, hand ported heads and drag pipes....pulled 77HP and ran sweet as any EVO motor I ever saw.

Cams don't give problems...only power in the wrong place if you choose the wrong one...they ALWAYS work because their job is just to open and close the valves...everything else is set-up.

 

you should buy a lottery ticket, because with that compression, and that short of a duration camshaft, your the luckiest human being alive it hasnt detonated itself into non exsistence....lol, with todays fuels being on the low quality side, i chose to run slightly longer durations camshafts to decrease cylinder pressure incase i run into crummy fuel on the road.

 

Wow, intake closing at 62, duration at 286, you are going to need a pusher vehicle to get an 80" 10-1 to the power range, bump the compresson up to 13-1 and try it but I would run from this guy.

E3-S - 44 62 70 36 286 286 80 99 107 103 0.502 0.502

The Woods W6 will work but detailed attention to setup is needed or it will sound like a diesel Put a new set of lifters in and adjust 32 thread per inch push tubes to 4-4 1/2 turns, if still a little noisy, go to 5 and it will be tamed down to very little noise. The W6 @ 10-1 will get your attention but details, details, details.

Which ever manufacture you call, they are going to tell you to use their cam. If the EV27 is in your thoughts, call Andrews and talk to them and ask about if it is detonation prone @ 10-1 and 36 intake closing, in Alaska temps and good AFR's, you can make it live but will need a good adjustable ignition with both the EV27 and W6. I hope I'm not adding to your confusion, I know first hand that high cylinder pressures and heat can be damaging but continue to talk to people and weed out the BS and make a logical decision, Call John and have a laid back conversation.

 

10.5:1 with a 27 cam...(and pulled 77 HP?)
marbles in a beer can.

Call or email Andrews and see what they say.
The guy's name is Gary Wallace...here's his contact info.
Ask him for yourself.


Jeff, forget the 27, and put the 46 cam in and be done with it. You'll be glad you did.

 

I guess we have better gas than you do in the US because its done 6000 hard miles since it was built and still goes well. No detonation, no problems of any kind....just heaps of MPH!!!

He did it because my Ironhead would waste him off the lights....afterwards it wasn't a very fair fight at all :-( Has been clocked at very illegal speeds and then he went and got me to build him a 101HP Twin Cam.

 

So do I need to rethink my choice of 10:1 pistons? I am NOt a top speed junkie by any means! 75-80 MPH TOPS on Alaskan roads where I ride so the cams thast come on @2000 RPMs seem a bit steep for me. I'd like some better low end grunt out of the hole. The Fatboy is 600+ and I'm 240 probably with riding gear so............Would 9:1 or 9.5 :1 be a better option to get the EV27 or the EVL3020 cams to fit better?