01-26-2007, 10:00 PM
Mike:
First, your reputation is well deserved and the dealers in the Seattle area speak well of you. That said I really need your advice.
After much discussion with the local HD service had the 103" High Output engine configuration installed on my 2007 Road Glide with the Twin Cam Performance heads and the SE258 cams. The set-up was straight out of the 2007 SE Pro Racing parts book (pg 22 bottom left hand side). Put on SE air cleaner and kept on the stock headers. Put on SE slip-on performance mufflers (pn 65115-98B - bought new on ebay), a muffler I was told by the dealer was a free flowing muffler and would work great. In the course of trying to tune on the dyno (using the SERT), the tech has indicated that they are having tuning the motor and the the HP was pretty disappointing (around 85) at 4500 rpm, but that the tq wasn't too bad. He's expressing the view that perhaps the mufflers with the stock headers are too restrictive. I like the sound of these mufflers but if they are really restricting the benefits of the engine upgrade they may have to go. So my questions: (1) Are these mufflers too restrictive to get the benefits of the upgrade? (2) Would these mufflers be fine in a true dual configuration? (3) If the answer is that that these mufflers are too restrictive regardless of the header set-up, would the performance be better with rinehart slip-ons (which the dealer is now suggesting)? and (4) if I go rinehart should I just forget the idea of slip-ons and go with the true duals? I feel like I was encouraged to buy mufflers which aren't good for the set-up and I really don't want to buy something else that isn't going to work. Also, if not rineharts (because they are so loud) other options with maybe a deeper tone?
I apologize for the number of questions but was disappointed to hear the report and don't want to make sure that if I spend more money it will get be right.
Thanks much.
First, your reputation is well deserved and the dealers in the Seattle area speak well of you. That said I really need your advice.
After much discussion with the local HD service had the 103" High Output engine configuration installed on my 2007 Road Glide with the Twin Cam Performance heads and the SE258 cams. The set-up was straight out of the 2007 SE Pro Racing parts book (pg 22 bottom left hand side). Put on SE air cleaner and kept on the stock headers. Put on SE slip-on performance mufflers (pn 65115-98B - bought new on ebay), a muffler I was told by the dealer was a free flowing muffler and would work great. In the course of trying to tune on the dyno (using the SERT), the tech has indicated that they are having tuning the motor and the the HP was pretty disappointing (around 85) at 4500 rpm, but that the tq wasn't too bad. He's expressing the view that perhaps the mufflers with the stock headers are too restrictive. I like the sound of these mufflers but if they are really restricting the benefits of the engine upgrade they may have to go. So my questions: (1) Are these mufflers too restrictive to get the benefits of the upgrade? (2) Would these mufflers be fine in a true dual configuration? (3) If the answer is that that these mufflers are too restrictive regardless of the header set-up, would the performance be better with rinehart slip-ons (which the dealer is now suggesting)? and (4) if I go rinehart should I just forget the idea of slip-ons and go with the true duals? I feel like I was encouraged to buy mufflers which aren't good for the set-up and I really don't want to buy something else that isn't going to work. Also, if not rineharts (because they are so loud) other options with maybe a deeper tone?
I apologize for the number of questions but was disappointed to hear the report and don't want to make sure that if I spend more money it will get be right.
Thanks much.