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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #61  
Old 31st August 2017
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95-100 is the Ballpark.
Done correctly
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  #62  
Old 31st August 2017
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Quote:
Originally Posted by Ghostdog View Post
Hey guys I was wondering if any of the regulars on here could give me a ball park horsepower and torque figure? I have a 2016 iron 883 , it's in the shop as we speak . The stock heads are being ported and polished and slightly decked . Adding 1275 kit with the standard reverse dome pistons. It has a powervision tuner s&s stealth air cleaner, short shots and Andrews n4 cams . Thanks in advance for your replies
I'm not sure who you are, but I need to warn you about something if I haven't already. Shop installs account for less than 10% of our sales, but more than 90% of the problems that customers have. The reason is that shops are quite often (not always) so sure that they already know how to do it, that they don't read the instructions. A do-it-yourselfer generally doesn't assume he knows everything, so he'll read the instructions, and as a result, the vast majority of diy'ers are successful. We basically cringe when we hear a guy is farming out his install.

The number one thing that shops screw up is the tuning. Our kit installation instructions are very specific, and if they are not followed, the pistons WILL scuff, not maybe.

So please, take responsibility for the tuning and make sure it gets done per our instructions, whether they do it or you do it. It's important. Tuned right, it's an anvil, you won't hurt it. But it requires a very different setup from a stock motor.

Since you have a Powervision, this link takes you to the specific paragraph in the instructions that applies to you. I will send you a tune that's safe. But I need you to follow that procedure first.

Quote:
Originally Posted by rocketmangb View Post
95-100 is the Ballpark.
Done correctly
You're a lot more optimistic than me. I think he'll be doing good to break 85. Two reasons for that. Number one, the Short Shots kill the top end power, at least if the baffles are in place - and I don't know anyone masochisitic enough to run those things unbaffled. Number two, using those cams with those pistons really ties your hands with respect to what can be done with the heads, at least with safe valve-to-piston clearance. It's a tough combination to make work.
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  #63  
Old 31st August 2017
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I should have read a little closer !
N4's and Short Shots really aint that good.
I stand corrected.
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  #64  
Old 31st August 2017
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Sportster/Buell Model: Sportster iron 883>1275
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Thank you guys for taking the time and effort. As for Hammer Performance response, my mechanic has a shirred me that he will contact you first for a program before he starts the engine. He's in the process of putting it back together as we speak. He's leaving early today so he'll probably contact you tomorrow or Saturday about the program. I'm very excited for this I realize short shots are not the best. But that's what I have at the moment. I spent too much money already. so the exhaust will be addressed next season for this winter. I'm looking forward to having my bike back and enjoying the power. Thank you for your help it's greatly appreciated
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  #65  
Old 25th November 2017
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Quote:
Originally Posted by aswracing View Post
I'm not sure who you are, but I need to warn you about something if I haven't already. Shop installs account for less than 10% of our sales, but more than 90% of the problems that customers have. The reason is that shops are quite often (not always) so sure that they already know how to do it, that they don't read the instructions. A do-it-yourselfer generally doesn't assume he knows everything, so he'll read the instructions, and as a result, the vast majority of diy'ers are successful. We basically cringe when we hear a guy is farming out his install.

The number one thing that shops screw up is the tuning. Our kit installation instructions are very specific, and if they are not followed, the pistons WILL scuff, not maybe.

So please, take responsibility for the tuning and make sure it gets done per our instructions, whether they do it or you do it. It's important. Tuned right, it's an anvil, you won't hurt it. But it requires a very different setup from a stock motor.

Since you have a Powervision, this link takes you to the specific paragraph in the instructions that applies to you. I will send you a tune that's safe. But I need you to follow that procedure first.



You're a lot more optimistic than me. I think he'll be doing good to break 85. Two reasons for that. Number one, the Short Shots kill the top end power, at least if the baffles are in place - and I don't know anyone masochisitic enough to run those things unbaffled. Number two, using those cams with those pistons really ties your hands with respect to what can be done with the heads, at least with safe valve-to-piston clearance. It's a tough combination to make work.
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