2012 107" build numbers seem low
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From: Lethbridge, Alberta Canada
Someone more knowledgeable on Harleys than I am:
I notice on closer examination that the power available at 2500 rpm is WAY lower than what an HD Stage 4 race kit provides, even assuming a restrictive exhaust.
Is it possible that the cams were installed mistimed?
Jim G
I notice on closer examination that the power available at 2500 rpm is WAY lower than what an HD Stage 4 race kit provides, even assuming a restrictive exhaust.
Is it possible that the cams were installed mistimed?
Jim G
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From: East of the Sun, West of the Moon
Hello all,
I just finished having a 107' build I completed and the took it to have it tuned and run on the dyno and the number seem a bit low to me I was wondering if anyone had input as to why, or opinions on the torque curve I guess for the $$ spent I expected a bigger kick in the pants. Build specs as follows
107" plugged, welded, balanced and trued with H-beam rods, Hillside stage III heads, (10.3:1) Flat top pistons, Kuryakyn 24-d cams, with SE billet cam plate and high volume oil pump, SE heavy breather, SE 58mm Throttle body, 5.3 injectors, 4" Rinehart True duals, SE extra Clutch plate kit and heavy duty spring, tuned with a Power Vision
Thank you for all of your opinions
[IMG]
[/IMG]
I just finished having a 107' build I completed and the took it to have it tuned and run on the dyno and the number seem a bit low to me I was wondering if anyone had input as to why, or opinions on the torque curve I guess for the $$ spent I expected a bigger kick in the pants. Build specs as follows
107" plugged, welded, balanced and trued with H-beam rods, Hillside stage III heads, (10.3:1) Flat top pistons, Kuryakyn 24-d cams, with SE billet cam plate and high volume oil pump, SE heavy breather, SE 58mm Throttle body, 5.3 injectors, 4" Rinehart True duals, SE extra Clutch plate kit and heavy duty spring, tuned with a Power Vision
Thank you for all of your opinions
[IMG]
[/IMG]Have you verified
1. no intake leaks
2. no exhaust leaks at heads or connection points
3. no oil leaks at base of cylinders
4. compression test
5. compression leak down test
6. cam is properly installed
this is my chart for a 103 with nothing more than Kirby's streetport and Andrews 57H cams, SE Ventilator, Fullsac DX pipe and Rinehart 4" slipons.
Last edited by UltraNutZ; Apr 11, 2014 at 02:31 PM.
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From: Clovis
Thank you to everyone and I mean everyone for the responses. I am going to triple check leaks on intake and exhaust! I have thought of the exhaust system issue with it being true duals but have done my research as well on the best systems. My question to everyone would now be if I switched exhaust saying the cams are aligned (I KNOW THEY ARE) and no leaks, what is the exhaust most would run?
I personally like the look of Yaffe 2-1 exhaust but worry about the power loss being that it is a short turn system! Rinehart would be my only other thought because I hate the Thubderheader sound and look. Yes I am one that wants looks and power realizing it doesn't always go together!
I personally like the look of Yaffe 2-1 exhaust but worry about the power loss being that it is a short turn system! Rinehart would be my only other thought because I hate the Thubderheader sound and look. Yes I am one that wants looks and power realizing it doesn't always go together!
Stellar HDF Member
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From: Lethbridge, Alberta Canada
I have the D&D Low Cat (same as Fat Cat but tilted just a bit upward at rear for lowered bikes), on my 2014 Breakout with Stage 4 Race kit, so my setup is at least similar to yours. I am still breaking it in, so no 4 hour dyno tune done yet (scheduled for 4-19), but it feels and sounds very, very good.
Jim G
Jim G
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From: Ohio
The only way builds with this cam fall flat is lack of air,not enough compression or a bad exhaust.
FWIK Rivas is a pretty decent tuner he has tuned 1-2 builds I did the heads for and both customers were very happy.
FWIK Rivas is a pretty decent tuner he has tuned 1-2 builds I did the heads for and both customers were very happy.
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A Supertrapp 2/1, starting with say 26 plates as a baseline, would be an outstanding pipe, as it can be tuned with that plate system, by removing, or adding to.
If something was not allowing a good amount of air coming to the engine, it would not have allowed the engine to be on an almost 45* climb to about 6000 rpms.
Scott
If something was not allowing a good amount of air coming to the engine, it would not have allowed the engine to be on an almost 45* climb to about 6000 rpms.
Scott
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Joined: Feb 2014
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From: Lethbridge, Alberta Canada
A Supertrapp 2/1, starting with say 26 plates as a baseline, would be an outstanding pipe, as it can be tuned with that plate system, by removing, or adding to.
If something was not allowing a good amount of air coming to the engine, it would not have allowed the engine to be on an almost 45* climb to about 6000 rpms.
Scott
If something was not allowing a good amount of air coming to the engine, it would not have allowed the engine to be on an almost 45* climb to about 6000 rpms.
Scott
Jim G
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If it was the head, which it is NOT, it would fall flat upstairs. It does not, as the chart is biased in that direction, supporting evidence of the head working.
Over exhausting, slow response via tbw manipilation, etc could be contribuiting to the low end loss.
Only speculation, but the LAST on the list is the head, as it flows more than an untouched, 2" valve S&S Super-Stock casting.
Scott
Over exhausting, slow response via tbw manipilation, etc could be contribuiting to the low end loss.
Only speculation, but the LAST on the list is the head, as it flows more than an untouched, 2" valve S&S Super-Stock casting.
Scott
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From: East of the Sun, West of the Moon
I agree with Scott.. There is something else going on here and I still suspect a leak to be a part of it