Help me choose a muffler. (1 Viewer)

[cruiserdan]

My new-to-me 13BT powered BJ74 is currently sporting a straight through exhaust with no muffler. If it was a big block Chrysler V8 that would be devine to my ears but the 13BT note is a bit coarse.

Help me decide what to add. I'm thinking a Flowmaster 40 or 50?

 

[Chester]

without pic's, this thread is useless..

 

[In2cruisers]

On my HJ60 and now on my LJ70 I ran 2.5" Pipe all the way back with a 18" resonator...happy both times

 

[AlbertoSD]

Hey Dan,

My understanding is that whatever muffler you buy, it must be a straight in and out muffler, meaning that the inlet and outlet have to be aligned and you should be able to see the outlet through the inlet without much restriction. A muffler that it is typically used for a gasoline engine (sometimes off-set) will create too much restriction to the exhaust flow and will severely increase your exhaust gas temperature (EGT).

Here is a link to the muffler that I will install on my BJ70 once I put on the turbo (3B-T) and I have seen multiple threads (on IH8MUD) with people using them and they seem to be fairly happy with it:

http://www.aeroexhaust.com/mufflers.html

I bought the AT2525XL and it is 2.5" in, 2.5" out in the extra large version. They also sell the AT2525 regular size if space is a concern. Some people seem to use a 3" exhaust for a 13BT as shown in post #78, #79, and #80 of the thread below:

https://forum.ih8mud.com/70-series-tech/286801-canadian-build-jdm-bj74-4.html

If you decide to go 3" and with the AeroTurbine then the muffler would be an AT3030XL or AT3030 depeding on the version that you want.

The cheapest place I found these mufflers was (if link doesn't work, google "Mandrel Bending Solutions"):

http://www.mandrelbendingsolutions.com/servlet/the-Aero-Exhaust-cln-Turbine-XL/Categories

I bought two of the AT2525XL version (one for the BJ70 and one for the BJ40), a 2.5" Flex Piple, some clamps and odd parts and shipping was about $20.

Hope this helps!

-Alberto

P.S. Some more links about IH8MUD members using the AeroTurbine:

Karter's HZJ77 build: https://forum.ih8mud.com/70-series-tech/667952-my-hzj77-build-3.html

https://forum.ih8mud.com/70-series-tech/696382-where-get-aeroturbine-muffler-canada.html

 

[GTSSportCoupe]

I have an Aeroturbine 2525xl on mine and really like it. Not very loud at all, just a nice aggressive grumble is all.

 

[ForealBoreal]

Don't mind my 3030xl as of this point at times I wish it sounded more sporty. The smaller one (no xl at the end) doesn't have any ceramic packing in the front of the muffler. I would imagine it would be sportier and at times I wish it was louder but it's not needed.

 

[BC40]

I run a flowmaster 40 on my turboed BJ60. Nice mellow sound, works for me.

 

[Malahki]

I am running the Aero Turbine muffler on 3" exhaust on my BJ74. Really love the deep throaty sound when its working hard below 2500RPM.

 

[cruiserdan]

Great suggestions. Thanks to all of you.

 

[stayalert]

I also added a aero to my 3" - MUCH more suitable for my purposed - sounds grest - not too loud

Agreed on the demand for photos!

 

[cruiserdan]

Here is one poached from another thread......I haven't taken any of my own yet....

 

[rutbeer]

I fitted up a 100 series resonator on mine today, and it works like a champ. Before welding it up, I glanced inside and it's just a perf metal inner and straight through. It really took all of the annoying sound out of the exhaust just like a muffler would. Best part, 100 guys pull them off so you can pick one up for free. Other than a slight restriction b/c it was smaller than my 2.5" exhaust, I have very few complaints about it so far.

I plan on trying an 80 series too, just b/c it's so much shorter than the 100. 100 resonator is very close to a muffler in size.

 

[bj70_guy]

Another happy Aero Turbine user here.

 

[John Galt]

I just ordered a Flowtech 50251 from Amazon for my 13B-T. Good price.
http://www.amazon.ca/dp/B0002M9PC0/ref=pe_386430_121528420_TE_dp_1

It's also available from Amazon US.

 

[Gun Runner 5]

My new-to-me 13BT powered BJ74 is currently sporting a straight through exhaust with no muffler. If it was a big block Chrysler V8 that would be devine to my ears but the 13BT note is a bit coarse.

Help me decide what to add. I'm thinking a Flowmaster 40 or 50?

A guy your age can still hear?
Sincerely, The pizza cutter tire guy.

 

[cruiserdan]

Holy thread revival.

I ended up using one of the two Solo Performance 3 inch ID stainless resonators that I removed from my SRT8 Challenger. So it ended up being "free" the second time around. Of course the first time around it was stupid money that was not very well spent....