In development: RPM header for FJ's

[racerrad8]

Lots of FJ's use saddle bags, GIVI or other.  It was my understanding that the original FJ exhaust was kept low for mounting bags, I would recommend the mufflers height not exceed OEM.  Randy are you thinking 4-1 or 4-2 systems? (I like the symmetrical look of a 4 into 2 system).

John

The mounting and angle of the exhaust are to be as close to factory, just for the reasons explained.

It will be a 4-2-1 system. The difficulty of the 4-2 is the collector box that is required. The manufacture does not do that style of exhaust and based on my research when beginning this a while back was the collector box is a large expense to manufacture. The other issue of the collector box is noise. When the system is made out of S/S the material used is thinner and the noise produced from the collector box is increased significantly.

The 4-2-1 system is to allow access to the drain plug without removing the exhaust for service purposes.

Randy - RPM

[Dads_FJ]

Makes sense, and since your middle name *is* Performance I can see why you'd go that way.  Next question:  Are you going to offer turn-key bikes with all your goods already installed, like Yenko, Roush & Saleen?

[racerrad8]

Next question:  Are you going to offer turn-key bikes with all your goods already installed, like Yenko, Roush & Saleen?

Hmmmm...I know there was a reason I was picking up bikes to sit around the shop...

Randy - RPM

[aviationfred]

Makes sense, and since your middle name *is* Performance I can see why you'd go that way.  Next question:  Are you going to offer turn-key bikes with all your goods already installed, like Yenko, Roush & Saleen?

Hmm..... Now that is an interesting thought. Buy up dead or dying FJ's and resurrect them with a mild 1250 bore, FZR front wheel, GSXR 750 rear wheel and all Randy's goodies.

Fred

[Harvy]

 Hmmmmmm.......My Tranzac is mild steel and is not going to last much longer.......this could be just what the Dr ordered.


Harvy

[Klavdy]

Modernised,original looking FJ's?
Sweet.
There's still a big demand for retro.
As an example,Jeep Grand Wagoneers are quite popular,you could be onto a cult classic with a rebuilt, modernised machine, Randy.
The Jeeps get a pretty good price too.

[Dan Filetti]

Modernised,original looking FJ's?
Sweet.
There's still a big demand for retro.
As an example,Jeep Grand Wagoneers are quite popular,you could be onto a cult classic with a rebuilt, modernised machine, Randy.
The Jeeps get a pretty good price too.

My Mother drove one of those!!  She replaced it with an International Scout, which I proceeded to wrap around a tree, but that is another teen-aged drunken/ stoned binge story, for another time...

Dan

[Harvy]

  She replaced it with an International Scout

Dan

I had one of them! big grey monster LWB with the 345ci Canadian V8 truck motor and Chrysler auto......was a good thing!

Harvy

[Dan Filetti]

  She replaced it with an International Scout

Dan

I had one of them! big grey monster LWB with the 345ci Canadian V8 truck motor and Chrysler auto......was a good thing!

Harvy

Great machines the Scouts. This was a red and white striped Scout II with a dorky white hard top -never was able to convince my mother to remove that hard top...  It was rebuilt after its unfortunate encounter with that mighty Black walnut tree. I drove past that tree a few months back, it still bares the mark that Scout left behind that Snowy January day.


Makes me smile to think about that beast.

Dan

[baldy3853]

Randy
The opition of having the headers porcelin coated inside and out will also be a big help in pushing the heat out the rear end and allow the headers to be a lot cooler keep the heat away from the motor etc
Baldy

[Pat Conlon]

Also to consider is the packing on the muffler. Staintune (Aus) uses a scrubbable stainless steel packing which is a life time product.

Never do you have to disassemble the unit to replace blown out fiberglass packing.... 

[racerrad8]

The prototype header has arrived and has now been test fitted on all models of the FJ. Small issues have been noted and sent to the manufacture for addressing. Nothing major, just some minor mounting issue.

I can tell you so far it is trick. I pulled a complete stock system from the bike it is currently installed on. The O.E. system weighs in at 35.8 lbs.

The RPM exhaust with the aluminum muffler tips the scales at 9.6 lbs with the aluminum muffler. There are going to be two other options for the muffler which will be lighter in titanium and carbon fiber. This muffler is significantly quieter than the Supertrapp I had on my 86 prior.

There is also a Megaphone muffler that will bolt right on. I wasn't a fan at just seeing it in the photos, but after installing it it looks cool.

We have a few weeks of testing to confirm no other issues with the application and we should be able to get the system into production.

Stay tuned as I hope to have the system ready within the next month or so.

Randy - RPM

[Harvy]

Randy, is the system a 1 piece 4 into 1?

My old 4 into 1 is not much longer for this world (read rust) so I am hoping to replace it with one of yours in the near future and keep my existing Micron can.

Cheers
Harvy

[Pat Conlon]

Harvy, Randy has been clear that access to the oil drain is paramount, I am not aware of a 4 into 1 system that would allow this. Randy already has discussed in this thread about a 4 into 2 into 1 system.

I am looking forward to replacing my Kerker 4/1 system just for the ease of oil changes... Cheers!  Pat

[Harvy]

Thanks Pat


My old 4 into 1 must be a rarity in that it allows access to the sump plug no problem.

Cheers
Harvy