Harley Davidson Sportster Shop Mule Dyno Tune With 1275 Big Bore Kit
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- เผยแพร่เมื่อ 16 ก.ย. 2024
- Here is the final dyno pulls from tuning our shop mule with the 1275 big bore kit with flat top pistons, stock 07-later XL1200 heads, stock W cams, patriot exhaust and Hammer Air Cleaner. In the end we compare a stock 1200, 1250 big bore kit, and 1275 big bore kit.
I have a 2000 1200XL. Love seeing Sportster upgrades. Keep the videos coming.
Sounds so much better than the new Honda Harley came out with last week
also you have mentioned what a the modifications to be done to the engine, but i also recommend you to post a video on what exhaust , and air filter and also the dyno tuner you would recommend (p.s: i did go through the faq's on the website) but the videos you are making is awesome, i never ever knew that the 1200 can get some much hp and torque apart from the stage 4 kit harley sells, thank you so much inventing such a dynamic package
Looks like a Sportster roadster purchase for $6k may be an upgrade gem waiting to happen.
I like mine.
Time to get HAMMER'D!!
dope vid man cant wait for more comparisons!
I posted on my page in my Short Videos, me running y’all’s 1275 on the Flattrack. That Kit is GNARLY👏🏽🤘🏽 best investment.
My ears tell me that is a well balanced engine.
but i was also expecting you to show a dyno of complete stock 1200 vs the 1275 to make sure what is the gain we are getting
3 yrs late, but there are 100’s of stock 1200’s on dyno’s. Baseline is known.
@FreeBehindBars ah yes, the chart of 1200 vs the 1275 120 plus package of hammer performance. Even I know what is the baseline or the dyno of the stock ones.
But if they post this chart comparison of these 2 it will be awesome.
Haven't seen any new videos in a while.
I’m looking at the 1275 120hp kit, I’m dying to see how it goes on my 2022 forty eight.
Did you do it? I have a 2012 an thinking about it
There was an 883 racing class. What was learned ? High RPM ?
im looking to do a 1275 kit on my 2011 XR1200x. how much power can i expect to get with the 1275 kit and my vance & Hines competition exhaust?
James Wiles same
Im still saving but, I'm looking at doing the basic 1275 on my 883. I planned to retain the 883 heads and cams until I save enough to go back and replace them both with a better set up. Also what would be What size cams are safe to run with the flat top pistons? 95-110hp goal.
Please watch these two videos, I think they'll answer your questions: th-cam.com/video/F9d-AJ3R6Js/w-d-xo.html and th-cam.com/video/flgdYTCfXuU/w-d-xo.html .
I wana get hammered . ive believe. im on board. Sign ing up.
What cam do you recommend for making huge torque throughout the rpm range on a 1275 kit?
That's not possible with just a cam swap, generally speaking there are no cam miracles available. But the total answer really depends on not only the year, but also whether we're talking about a native 883 or 1200 and how else it's equipped. We can make a specific recommendation if you'll shoot us a note by filling out this form, it asks for all the info we need: www.hammerperf.com/contactus.shtml#salesform
Safety 1st
Any chance of Patriot producing more pipes for pre 03 Sportys.
At this point I'd have to say it's highly unlikely. A fire in their factory stopped production of all XL exhausts and it doesn't appear that any of them will be available again.
I have an 883. What sort of increase will I get by going big?
See here for the exact same comparison done with 883 heads instead of 1200 heads: www.hammerperf.com/883conversions.shtml#basic
I got a question I will call soon I was wondering about the heat being produced with the 1275 from the 883 how does it affect the cooling should I upgrade the oiling system
Ridden the same way, there is no increase in the heat generated from a 1275 as compared to an 883. You have to understand, the power is regulated by your right hand, and the bike requires no additional power to go a given speed than it did before the conversion. So for example, if it required 15hp to go 60mph before the conversion, it still requires 15hp to go 60mph after the conversion, and you're going to throttle the power to go that speed. The fact that the 1275 wide open makes more power than the 883 wide open really isn't relevant.
The heat is fundamentally a byproduct of burning fuel. So in normal riding, it really comes down to how efficiently the motor turns fuel into power, and on that front, the 1275 generally does better, if anything, as most customers report an improvement in fuel efficiency after installing the kit.
Now sure, if you ride the bike in a more aggressive fashion after the conversion, then it's going to generate more heat. However, one advantage to our kits, as compared with competing kits, is that ours are available in the big fin style as found on 2004+ bikes. Not only do these bigger fins match the 2004+ heads properly, but they also cool better than the small fin cylinders.
As far as oiling system upgrades go, nothing about the 1275 kit necessitates oil system modifications. However, depending on the year of the Sportster, there are some worthwhile improvements that can be made to the oiling system. The most basic of those is to use the latest and greatest oil pump. The oil pump saw improvements in 1991, 1998, 2000, and 2007. The 2007+ oil pump is a nice upgrade for any 1986-2006 Sportster. It fits 5-speeds directly, and it's not difficult to put it on a 4-speed (1986-1990) as well. Another worthwhile mod is to upgrade the oil pump drive gear (on the pinion shaft) to the 2006 Buell piece, which is made of bronze. This heads off a common failure on bikes that are modified to turn higher rpm. Finally, on 4-speeds you really have to watch that bypass valve that's built into the oil filter pad. They are known to fail and cause the motor to lose oil pressure, dumping oil into the cam box instead of into the motor's oiling system as designed. Best to just lock that bypass shut.
Do you advise on upgrading the clutch with this kit ??? Just wondering also I assume keep the belt but do you recommend sprocket upgrades as well and could this kit be a good idea for long rides in spring I'm getting a 2003 sportster 883 and eventually I'd love to do this kit
The 2003 clutch can hold the torque of a basic 1275 conversion just fine. It's only the 2004+ XL 883 models need a clutch upgrade when doing a basic 1275 conversion. That's because starting in 2004, all 883 models started getting a weak clutch spring to reduce lever effort. If you convert a 2004+ XL883 to 1250 or 1275 and you don't at least change the spring, a handful of throttle in a higher gear will make the clutch let go, it'll feel like you kicked it into neutral. Do that very many times and the clutch will be toast.
You'll notice that our basic 883 to 1250/1275 conversion packages through the 2003 model don't include a clutch upgrade, and the same packages for 2004+ models do include the clutch upgrade: www.hammerperf.com/883conversions.shtml#basic . That package is the easy way to get everything you need for a successful conversion on an XL883.
what does a completely stock 1200 run on dyno ? ty
I'm thinking of ordering your 1275 kit for a 883 . I'll do the heads later and plan on keeping it streetable and dependable . Can I do that with the N4 cams and come out pretty good ? And I would like to do ignition as well and know you recommend dyna . But could I get away with a ultima for the time bieng ? Thanks !
Pistons, cams, and heads need to be a matched set. Which means you can't move any one of those three things very far without bringing the other two along. For example, the pistons that are made for your stock heads and cams are different from the pistons that are made for ported heads and big cams. So doing a hop up project over time means you end up buying some parts twice, and that makes it more expensive. Watch this video for more details: th-cam.com/video/flgdYTCfXuU/w-d-xo.html . Not the answer we want to give, but we can't change the laws of physics.
The Ultima ignition does not offer a curve that's suitable for our engine kits. If you use an Ultima ignition with one of our kits, you may damage the kit. I'm sure you understand, this type of damage is not covered by warranty because it does not represent a defect in the kit. So go there at your own risk. There is a programming kit available however that would allow you to create a suitable curve on the Ultima.
@@HAMMERPERFORMANCE I appreciate the reply . Thats the answer I was looking for lol. How much roughly is the cost to do my 1999 883 heads for the 30° pistons ? Thanks ill probably be ordering the next couple of days just trying to get it together before I jump.
@@jesslittle7110 We offer various levels of head work for different power levels. Furthermore, the cams and pistons vary right along with the head work, again depending on the power level. It's all a matched set.
Follow this link: www.hammerperf.com/883conversions.shtml#packages . You'll find seven different packages described. The first one is a complete 1250 or 1275 conversion package based on your stock 883 heads and stock cams. That's our best seller. The six that follow that package each contain a matched combination of head work, cams, and pistons in the 1275 kit, plus other supporting components, to achieve a power level from 80hp through 120hp in the most cost-effective way possible. For each package, you'll find a description, dyno sheet, pictures, and a sample quote you can download that shows everything included, the price of each item, and you'll find the total on the last page.
That page is our guide for converting your 883 to a 1250 or 1275. I highly encourage you to give it a read.
Has anyone thought about doing that 1275 hammer kit with the addition of a trask turbo kit on a sportster?
My dad had an anniversary edition sportster xl1200 bored to 1800
The bike had over 100hp man was it loud and fast. You could hear him a few minutes before you even saw him
It was done by hammer performance if I remember right
The biggest bore that can be supported by the factory cases is 3.875", which works out to 1474cc and is commonly referred to as a 90ci build. Boring the cases enough to accommodate any bigger bore cylinders than that would require relocating the cylinder studs, and the factory cases don't have the material to do that. You would also need to relocate the cam box and valve train outward because even the 3.875 cylinder gets awfully thin on the pushrod side, which is one reason the 90ci is best done with full cast iron cylinders, the additional strength is needed. Cast iron cylinders also help avoid cracked cases, because boring the cases to accommodate the big bore cylinders also weakens them, and they like to crack when used with aluminum cylinders. The cast iron cylinders add a lot of strength to the whole assembly and significantly raise the power threshold at which the cases are put at risk of cracking.
S&S used to offer "Special Application" cases that implemented both the larger cylinder stud pattern and the relocated cam box. They sold a preassembled complete motor called the "SB100" which was a 4" bore and a 4" stroke. That works out to 1647cc or 100ci. That motor came out around 2000 and was recently discontinued. You can read about it here: www.hammerperf.com/images/sb100.jpg . The SA cases could support up to a 4.375" bore however, which at the 4" stroke gives 1970cc or 120ci. These were popular in certain racing classes. But you're talking a full-on race motor that's much taller than the stock motor and will not fit into a factory chassis without extensive modification.
Having a stock '99 1200s with dyno sheet 78tq 73hp, those heads with Patriot pipe are that much better than the dual plug head on my bike? I assume shop mule is F.I.? Forum member Sprtstr1200s.
Actually I'm really surprised you're doing that well with stock Lightning heads, that's impressive. But yes, the current XL1200 head (which is what was used for this test) is far far superior. Much bigger valves, better ports, better chamber, better springs. There's really no comparison. Lightning heads were the first generation of Evolution XL performance heads. Second generation was Thunderstorms. Third generation are the Buell XB and 2004+ XL1200 heads.
Has anybody used your kit with a turbo
yes, quite a few.
with this set up do you have to change the carburetor
Yes, the 120+ package for Sportster models through 2006 include a Mikuni HSR48 as well as a billet manifold. The package for Sportster models 2007+ however includes a larger throttle body. You can read all about the 120+ package here: www.hammerperf.com/883conversions.shtml#120hp
Will the 1275 kit work on the xr1200
Yes, absolutely, we've put a number of XR1200 owners into 1275 kits. The only difference is the head gaskets we provide, the XR1200 requires slightly different ones. Contact us if you want a kit for an XR1200, using this form: www.hammerperf.com/contactus.shtml#salesform
Can you turbo the 1275 kit ?
If you're a masochist, sure.
Can you show the results using the 1275 kit with stock 883 heads?
Sure, click here: www.hammerperf.com/883conversions.shtml#basic
I need cams
Just give us a call
208-696-1250
Will the fp3 tuner work for 1275 kit?
It poses some obstacles and has some limitations, but it can be done on milder builds. Give this a read: www.hammerperf.com/883conversions.shtml#fp3