Real Difference in Duals
#21
The thing about a dyno sheet like that is that you never really know what, how or why. Not saying it's not accurate, maybe ThunderHeader is ***** ... I dunno. As the runs are 16 minutes apart I'd say there was no tuning done with the change. Maybe a possibility that tuning is an issue, who knows? Maybe you're right. Maybe everything I've ever known about cylinder scavenging and exhaust collectors / crossovers is wrong. I dunno. I tend to trust the people who know and have followed proven tech.
Again, I have no dog in this hunt.
#22
I don't collect dyno sheets so no, I don't have any.
The thing about a dyno sheet like that is that you never really know what, how or why. Not saying it's not accurate, maybe ThunderHeader is ***** ... I dunno. As the runs are 16 minutes apart I'd say there was no tuning done with the change. Maybe a possibility that tuning is an issue, who knows? Maybe you're right. Maybe everything I've ever known about cylinder scavenging and exhaust collectors / crossovers is wrong. I dunno. I tend to trust the people who know and have followed proven tech.
Again, I have no dog in this hunt.
The thing about a dyno sheet like that is that you never really know what, how or why. Not saying it's not accurate, maybe ThunderHeader is ***** ... I dunno. As the runs are 16 minutes apart I'd say there was no tuning done with the change. Maybe a possibility that tuning is an issue, who knows? Maybe you're right. Maybe everything I've ever known about cylinder scavenging and exhaust collectors / crossovers is wrong. I dunno. I tend to trust the people who know and have followed proven tech.
Again, I have no dog in this hunt.
#24
#25
#26
I can share what I experienced. I went from a stock setup to Dresser Duals and a FuelPak ... later a PowerVision. I didn't notice much of anything. I did like the true dual sound better though. I was looking for a deeper tone and wanted more bottom to mid power. I went to the FM Super Duals and HiRoller mufflers. With the tune FM gave me, I noticed a good hit in the mid range right to the top. At lower revs it seemed to have more pulling power, but the hit in the mid was definitely noticeable. I put in the FM inserts and immediately noticed that mid range hit starts at almost off idle. The engine does seem to lay down a bit now when approaching the rev limiter, but I rarely get the engine revving that high. I'm happy with the setup. The tone is a booming bass that I love, but amazingly enough is still within legal limits. It's not really LOUD but is deep enough that heads turn. With all of the auto tuning and messing around with the true duals, I never could get the same power. It might be as well the change in mufflers, but I had the SE FatShotz which are known to be a pretty good power muffler. When I asked FM about their E0SAeries mufflers with that header or the HiRollers, they said the HiRollers would offer a deeper tone, but both would perform about on par. For me that little crossover made a world of difference.
#27
#28
Okay guys, since I pulled the trigger on Cobra true Duals, and I knew that 2 into 1 would produce better torque and power but I like the sound of true duals and I had Cobra RPT's on my Super Glide and quality was great. I have a muffler question as follow up, I am currently running a set of Rinehart 3.5 inch slip ons and I also have a set of Screamin Eagle 3.5 mufflers. Anyone have any idea which ones will sound better and would one give better performance over the other?
Thanks
Thanks
Thread
Thread Starter
Forum
Replies
Last Post