EV13 in ‘93 Dyna - looking for others with the same setup
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Intermediate
Joined: Dec 2013
Posts: 37
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From: Texas
EV13 in ‘93 Dyna - looking for others with the same setup
Finally getting around to resurrecting my ‘93 Dyna (been sitting since 2018; been in the family since new). Has 33k on the clock. Finally decided on doing a pretty mild build, and have settled on the EV13 cam (along with new lifters, new Torrington cam bearing, S&S reed valve breather, new ignition module & sensor, carb rebuild, V&H Big Shots staggered pipes, and new umbrella seals) …
I’ve seen a lot of thumbs up for the EV13, but mostly for touring bikes. I’m running stock gearing (3.37 final) - wanted to see who else has a Dyna with an EV13 cam and what your experience has been. I’m looking to make this a long distance bike; I’m not much of a racer type, but want to be able to pass without a mile of highway and a prayer while doing it.
So far, I have been on the fence about shaving the heads - if I do, I won’t go much over .035 and throw in a .30 cometic head gasket to raise the compression a bit, but that’s about the extent of it. Toyed with an S&S Super E but since I’ll be doing some touring (and hopefully riding to Sturgis next year) I want some altitude compensation, which prolly means the CV carb it the way to go.
Any other thoughts? Long, rambling late night post that took a paragraph to get to the point ….
I’ve seen a lot of thumbs up for the EV13, but mostly for touring bikes. I’m running stock gearing (3.37 final) - wanted to see who else has a Dyna with an EV13 cam and what your experience has been. I’m looking to make this a long distance bike; I’m not much of a racer type, but want to be able to pass without a mile of highway and a prayer while doing it.
So far, I have been on the fence about shaving the heads - if I do, I won’t go much over .035 and throw in a .30 cometic head gasket to raise the compression a bit, but that’s about the extent of it. Toyed with an S&S Super E but since I’ll be doing some touring (and hopefully riding to Sturgis next year) I want some altitude compensation, which prolly means the CV carb it the way to go.
Any other thoughts? Long, rambling late night post that took a paragraph to get to the point ….
Grand HDF Member
Joined: Apr 2007
Posts: 3,727
Likes: 3,072
From: Brighton, MI
Just my 2 cents:
The ev27 or the evl3010 would be better suited for your lighter bike. Especially if your considering touring. You will still have some cam "left over" when cruising 80 mph on the highway. You will also have plenty of passing power with or without a downshift. The ev13 is better suited towards the earlier portion of the power range. It's still a good cam but my thoughts are the 27 or 3010 would be better suited.
Consider shaving/truing the base of your cylinders .010. Along with the .030 head gaskets, it will keep your chances of "ping" down, while improving your squish (quench) fuel burn efficiency as well as boost compression just a touch. Keeps you in the "no need for premium fuel" range. Trueing the cylinder bases and using Cometic SLS base gaskets also eliminates the dreaded cylinder base gasket leak that is prone to these engines (fairly common).
There will be no need to shave the heads at all after the above mods, but then again don't totally discount shaving the heads a little. Do some homework first about shaving the heads.
The above set up is what I have done to my engine after some recommendations (see my signature) from some very experienced members here, and along with those recommendations and lots of homework, it is very rideable, fun to ride, feels right, mild mannered with an even temperament. Not fussy to fuels, does what I want. It is a respectable ride with no questions about durability/longevity.
It's an evo so there are better engine choices for winning races. But if you want to make some improvements to a tried and true good solid platform engine (our evo engines) that is still easy to work on, then consider the above.
The ev27 or the evl3010 would be better suited for your lighter bike. Especially if your considering touring. You will still have some cam "left over" when cruising 80 mph on the highway. You will also have plenty of passing power with or without a downshift. The ev13 is better suited towards the earlier portion of the power range. It's still a good cam but my thoughts are the 27 or 3010 would be better suited.
Consider shaving/truing the base of your cylinders .010. Along with the .030 head gaskets, it will keep your chances of "ping" down, while improving your squish (quench) fuel burn efficiency as well as boost compression just a touch. Keeps you in the "no need for premium fuel" range. Trueing the cylinder bases and using Cometic SLS base gaskets also eliminates the dreaded cylinder base gasket leak that is prone to these engines (fairly common).
There will be no need to shave the heads at all after the above mods, but then again don't totally discount shaving the heads a little. Do some homework first about shaving the heads.
The above set up is what I have done to my engine after some recommendations (see my signature) from some very experienced members here, and along with those recommendations and lots of homework, it is very rideable, fun to ride, feels right, mild mannered with an even temperament. Not fussy to fuels, does what I want. It is a respectable ride with no questions about durability/longevity.
It's an evo so there are better engine choices for winning races. But if you want to make some improvements to a tried and true good solid platform engine (our evo engines) that is still easy to work on, then consider the above.
Last edited by Yankee Dog; Dec 6, 2022 at 04:31 AM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
Likes: 7,640
From: Poolville
Yes the 13 is usually affiliated with the heavier bikes but there's nothing wrong with using it in a lighter Dyna.. especially for touring..
And if you're going to shave the heads you better get a set of decent adjustable push rods and you might as well change a lifters..
And if you're going to shave the heads you better get a set of decent adjustable push rods and you might as well change a lifters..
Cruiser
Joined: Dec 2020
Posts: 156
Likes: 82
From: Harrisburg, PA
I installed an EV13 in my FXR and I’m happy with it. I didn’t concern myself with the weight of bike or whether I toured or not. I spent some time paying attention to the rpm range where I spent most of my time. I found that 95% of my riding was below 3000 RPM and if I remember right, that was the sweet spot of the EV 13.
Yeah, it falls off at higher RPMs if I am feeling frisky and get on it a little bit, but it’s still performs well.
Yeah, it falls off at higher RPMs if I am feeling frisky and get on it a little bit, but it’s still performs well.
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Intermediate
Joined: Dec 2013
Posts: 37
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From: Texas
So many options …
About 15 years back, my dad put a Crane Fireball 310 in this bike, and pulled it back out shortly after. It lost too much low end grunt for his liking, but the good news is the adjustable pushrods are still there. Unfortunately, so is the original cam bearing and lifters so those are on the list.
@ YankeeDog, I have been on the fence between the EV13 and EV27, but I like grunt down low, and my riding style typically avoids the major highways. I don’t expect to see interstate speeds on a regular basis, and if I do I’m content to cruise in the slow lane. Haven’t ruled out the EV27, but leaning towards the EV13 as it seems suited to my riding style more and is a bit milder (but still miles better than the stock N grind). Definitely appreciate your feedback though, and I may very well go that route.
About 15 years back, my dad put a Crane Fireball 310 in this bike, and pulled it back out shortly after. It lost too much low end grunt for his liking, but the good news is the adjustable pushrods are still there. Unfortunately, so is the original cam bearing and lifters so those are on the list.
@ YankeeDog, I have been on the fence between the EV13 and EV27, but I like grunt down low, and my riding style typically avoids the major highways. I don’t expect to see interstate speeds on a regular basis, and if I do I’m content to cruise in the slow lane. Haven’t ruled out the EV27, but leaning towards the EV13 as it seems suited to my riding style more and is a bit milder (but still miles better than the stock N grind). Definitely appreciate your feedback though, and I may very well go that route.
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Intermediate
Joined: Dec 2013
Posts: 37
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From: Texas
@ mentalite - what RPM does it start falling off? I’ve seen some dyno charts on the EV23, which I thought wasn’t quite up there with the EV13, and the torque curve doesn’t start falling off until 4500, and drops maybe 5lb-ft by 5000 rpm … I don’t expect to see those RPM ranges often (emergency only maybe?)
Road Master
Joined: Sep 2021
Posts: 759
Likes: 936
From: Under the affluence of incahol.
I am very happy with the EV13 in my Evo Road King. Much improved power in the rev range that actually gets used the most, ie down low and mid-range. If I want high-rev power I will ride my sportbike.
I mostly ride the Road King solo with nothing in the bags so not a massive amount heavier than a Dyna etc. I push it hard through the mountain roads and the EV13 excels at that. Plenty of grunt coming out of the corners on steep uphill runs where the stock cam had it just sitting there chugging away like a chaff cutter with no pick-up. And it will still cruise at 80-100mph too. Not too much left after that though. A bit maybe but I never tried it too hard. Pushing that barn door windshield through the air at 100mph is enough for me and the old bike, regardless of cam.
I have no experience of the EV27 so can't compare the two.
I mostly ride the Road King solo with nothing in the bags so not a massive amount heavier than a Dyna etc. I push it hard through the mountain roads and the EV13 excels at that. Plenty of grunt coming out of the corners on steep uphill runs where the stock cam had it just sitting there chugging away like a chaff cutter with no pick-up. And it will still cruise at 80-100mph too. Not too much left after that though. A bit maybe but I never tried it too hard. Pushing that barn door windshield through the air at 100mph is enough for me and the old bike, regardless of cam.
I have no experience of the EV27 so can't compare the two.
Last edited by PeterB; Dec 7, 2022 at 02:06 AM.
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Grand HDF Member
Joined: Apr 2007
Posts: 3,727
Likes: 3,072
From: Brighton, MI
Yes the 13 is usually affiliated with the heavier bikes but there's nothing wrong with using it in a lighter Dyna.. especially for touring..
And if you're going to shave the heads you better get a set of decent adjustable push rods and you might as well change a lifters..
And if you're going to shave the heads you better get a set of decent adjustable push rods and you might as well change a lifters..
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Joined: Nov 2006
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From: la la land jerzey
Consider the 13 to be a cam you use in a RV for more pull on a hill - the 27 is more to the liking of guys who want some spirit in the throttle - another thing you can look at is the beehive valve springs as the transition between the RPM of the cam to road speed - the hit its called when the bike jumps like a 4 barrel carb on a 327 - is not there - the power is now linear through the RPM range it will now just pull all the way when ever you turn the throttle
the drag pipe crew is always used the 45 as it sounded like a hemi with - 2 - 4 barrel carbs drag car and pulled hard
while i agree with the machining the base of the jugs to set them flat again - dont machine the heads or the jug tops use the 030 cometic head gaskets and the cometic base gaskets
the drag pipe crew is always used the 45 as it sounded like a hemi with - 2 - 4 barrel carbs drag car and pulled hard
while i agree with the machining the base of the jugs to set them flat again - dont machine the heads or the jug tops use the 030 cometic head gaskets and the cometic base gaskets
Cruiser
Joined: Dec 2020
Posts: 156
Likes: 82
From: Harrisburg, PA
@ mentalite - what RPM does it start falling off? I’ve seen some dyno charts on the EV23, which I thought wasn’t quite up there with the EV13, and the torque curve doesn’t start falling off until 4500, and drops maybe 5lb-ft by 5000 rpm … I don’t expect to see those RPM ranges often (emergency only maybe?)
I don't know how finely tuned my butt dyno is, but this EV13 seems to suit my riding style perfectly. Normal riding (around town - light to light) is shifting at around 3500 and cruising at 2500-3000.
Good luck with your project!