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EFI Sportster Motorcycle Talk (2007 and up) For 2007 and above Sportsters

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  #1  
Old 15th April 2011
chuckles309 chuckles309 is offline
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Default getting the most out of 1200 ccs without punching it out

So my experience with my previous bikes has always included air and exhaust mods and, of course, carburetor mods. So here is what I want to do over the next few months...
I love the low end power of this bike and don't need it to do a quarter mile in r1 time. I want more of that low end. I want it to be insane. I want to put my heavy woman on the back, 100 lbs of luggage on there and still have that sick low end punch. But... its a 1200 cc air cooled v twin.
The bike fits me like a glove so before I upgrade to a bigger bike I am going to save for the 89cubic inch kit s+s makes. That's a few years down the road.

So for now what are some of your ideas for best options on getting more from the efi 1200.
I hear a lot from guys about screamin eagle pro race and street tuners. But id want to be able to do the mapping myself if there are ways about that.
Screamin eagle pipes or vance and hines short shots? K+n air filter or screamin eagle?

And anything else you might suggest. And where do all you guys get those intake assemblies I saw in "air cleaner porn" thread?

Thanks. This site is awesome by the way.
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  #2  
Old 15th April 2011
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If you want top performance stay away from the Short Shots. They suck as far as performance goes. If you want performance go with a good 2-1 pipe. A Thunderheader or a D&D Bobcat, something along those lines. Then you'll want a good high flow air box. Here's a good one at a good price: http://www.nrhsperformance.com/partshurricaneflow.shtml While your there take a look at their 88" and 90" kits. They're considered much better than the S&S kits.

Others can give you better advice on street tuners.

Good Luck!
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  #3  
Old 15th April 2011
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The S&S 89" kit will not work on your bike either. that is for 2003 and older XLs.

if you want real low end punch trade your stock primary gearing for an 883. It will really make it accelerate faster.

What specific air cleaner are you looking for?
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  #4  
Old 15th April 2011
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Tune it and forget it....

AW
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Regarding engine mods, it all depends what you are driven by......
Bling, bragging rights, silky smooth power delivery, a little more peak power, violent power delivery,
traction or wheelie limited acceleration, a sound that just drips testosterone or peace of mind that
everything is as perfect as you know how to make it.

When the racers get done doing the impossible the engineers get a chance to correct the errors in the model.

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  #5  
Old 15th April 2011
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Quote:
Originally Posted by chuckles309 View Post
........................
The bike fits me like a glove so before I upgrade to a bigger bike I am going to save for the 89cubic inch kit s+s makes. That's a few years down the road.

................
Take it from someone who went down that road. Don't.

Check out the kits from NRHS. You will be much happier and have more $$ left in your wallet for those road trips... Plus the performance is comparable to the S&S kit.

Dan, care to chime in on the comparison?


EDIT: Don't get me wrong, I love my sporty even more after the 89" kit, it's just that the reality of what has to be done to the engine and frame is quite a bit more extensive than they lead you to believe.
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  #6  
Old 15th April 2011
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Any kind of stroker kit (like the 89" or 100" S&S kits) requires you to do a ton of frame mofdifications. The NRHS 88 and 90 inch kits do not require frame modifications and they can be done to 2004 and up bikes also whereas the stroker kits cannot. And as said an 89" does not make any more power than one of our NRHS 88 or 90 inch kits which cost much less money to build.
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  #7  
Old 15th April 2011
chuckles309 chuckles309 is offline
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Well the big bore kit will have to wait a few years so for now I want more out of the 1200 ccs... or 74 cubes. My option of the 883 gearing is a no go. Was actually wanting more punch but want to keep the revs around what they are now on the freeway. Its not the speed I am looking for as much as the ability to handle mor but with the same gearing. So to keep the same gearing but raise the torque I have to boost the hp.
I don't know how true this is but I was told I could get over 90 horses out of the 1200 without punching it out. I am thinking maybe more lift... change the cams out to something that'll open it up in that area more. But if I go with a tuner and map it out for wider intake and exhaust (I like the 2-1 idea) then would I be able to use the same tuner module when and if I went with the cam mod?

I want to come up with a set plan so I know what to buy and where to go... and also what I can do myself.
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  #8  
Old 15th April 2011
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I may be wrong, but I don't see a way to get to the 90hp mark without some serious mods.

My 89" is putting out 96hp and 101'lbs of torque.
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  #9  
Old 15th April 2011
mxr33 mxr33 is offline
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i would start by looking through the dyno chart section here, this will give you a good idea of mods others have done and the results it returned. good luck with your build.
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  #10  
Old 15th April 2011
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Like previously stated the right exhaust is crucial to making power a good 2-1 is the best overall. A good set of slip on mufflers will give you a few more LB/FT of torque down low but quickly give it up to a 2-1 pipe. IMHO low end torque is overated but if you are convinced that is what you want. Changing the front pulley to a 28T (stock on 883) is the cheapest increase and I think the rpm ranges match posted speed limits much better. Next you need a good fueler not just for more power but your bike will run cooler too. Then consider getting stage 1 porting on your heads and a competition valve job, better flow= more power. Using the thinner Cometic head and base gaskets to tighten up the squish band in the combustion chamber promotes a more complete burn and more power. A custom ignition advance curve in your after market igniton will add a few more. If done right all these suggestions will increase power over the entire RPM range.
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