Double Glasspacks as Mufflers?

[TomoHawk]

I like the period look of the Jag dual muffler system, but not at that price, and the tube diameter is too big. Instead, what would the feasibility & practicality be to use two glasspacks with a sort of Y-pipe as the mufflers? The only limiting factor I can think of is the length of the glasspacks, but my exhaust has about 28 inches for the can, and another 8 or 10 inches for the tailpipes.

I think a connecting strap would be needed to attach a hangar hook, and just clamp the whole mess on to see how it sounds and if the engine likes it. If so, remove, blast clean & coat with something.

opinions?

thx

[ta240]

kinda like the MSA twice pipes setup but with one pipe going back to them?

[e_racer1999]

that would be pretty cool i suppose. just as long as you get the non-restrictive ones and you might want to run a third one inline as a resonator; otherwise it would be too loud

[Zulaytr]

On my first 240Z in 1972-73, I had a 3 into 2 header with dual pipes and glasspacks on it. The exhaust system came from BRE and it sounded awesome! The main down side was they used glass packs that looked like cherry bomb mufflers of which were mounted along side the driveshaft. I had to watch speed bumps etc or they would scrape, especially with a lowered suspension. But again since it sounded so good I was willing to put up with the low clearance issue.

[DaveN]

My first 72 had the same configuration, a 6->2 header, then dual pipes (over/under at the tips) with 36" long small diameter glasspacks tucked into the tunnel beside the driveshaft.

Best sounding Z exhaust system I've ever heard, by far. As smooth as the best sounding Jags.

Mine were made by Cannon and discontinued in the mid 70's. The BRE system looked identical and disappeared from their catalog at about the same time.

[hd240z]

My 71 also had the BRE dual exhaust when I got it 30 years ago and I loved the sound. When it got rusted and started to leak, I replaced it with similar glass packs and pipes from a local muffler shop. The replacement setup sounds as good as the original BRE as far as I can tell. As Zulaytr mentioned the center clearance is a little tight and you need to watch out for high spots even though my car still has the stock suspension.

[bloxman]

TomoHawk

I currently have a six into one collector then onto two glass pacs then an ansa slanted double tip mounted incorrectly. (not I , a previous owner install).
Clearance issues?

It sounds mighty good .
Mind you , I would imagine a pair of three's into two, leading to parallel glass pacs would sound mighty good as well.

mine are real ugly though, atleast fifteen years old.
I say go for it , it's garanteed to lively up the neighbourhood!

Bloxman

[TomoHawk]

I already use a glasspack as a resonator, and since I have an exhaust manifold, there's only 1 pipe to the back. The only questions I can think of is what length of glasspack to use, to have the end of the glasspack barely showing past the sheetmetal, and what to use for the tips. I think my current can is 28 inches to the front edge of the bumper.

What do you think of painting the cans with black BBQ grill paint? It works on mower mufflers & the boat mufflers & pipes.

You will also need to be careful how the two cans are strapped (attached) together.

I'm really tired of seeing & hearing the fart can that's on there ( it was free. )

thx

[76Datsun280z]

What do you think of painting the cans with black BBQ grill paint? It works on mower mufflers & the boat mufflers & pipes.


Either that or any automtive high temp. paint will work.

[TomoHawk]

The color should probably be similar to that of the rear finisher panel...

[ChrisA]

kinda like the MSA twice pipes setup but with one pipe going back to them?

I have that system on my 73. Very loud. But I like it! Especially when the motor is turning over 2500. Its not for those that like to listen to music in their Z. The only drawback was the PO cut the rear lower valance to fit over the side by side tips and he did a crappy job.

Chris

[TomoHawk]

I think I can fit a couple 24 inchers in there. It already has a resonator, so I'm confident that it will be quiet enough to live with. The muffler that's on there is a freebie fart can, which isn't much different than a glasspack (a stright-through design), except for the volume, and the megaphone outlet.

Maybe I should take my 3 and 4 inch hole saws in case the valence needs cutting?

I'm going to the muffler shop first thing tomorrow (8am Saturday) and hopefully the guy can put together something that will at least look decent. I mentioned the Flowmaster 40 series to the guy, but I would have to buy that on my own from somewhere.

thx

[e_racer1999]

please post updates! sounds like this is going to.... sound great!

[TomoHawk]

Well, there won't be any updates on this idea.... the muffler guy says there aint no way you can put two glasspacks in there ( then a big story about how the spare tyre bay is in the way, how the metal goes up & down & a bunch of hand gestures...) The ricer place next door had a polished thing with two tips for $150. :(

It looks like I'll be ordering a Monza deal from BD...(engaging search function...)

thx

[mars23z]

What if you ran something like this glasspack its dual on one side and singal on the other couldnt you run duals into it and then put a dual tip on the singal end? I dont know that much about exhaust but wouldnt that be like an H pipe kind of thing? I know the H is usually further back but..
http://store.summitracing.com/partdetail.asp?autofilter=1&part=WLK%2D24218&N=700+302015+115&autoview=sku

[John Coffey]

Your muffler guy is lazy. I built (for a customer) exactly what you're looking for using these glasspacks from Summit Racing (part # SUM-630802) and a simple Magnaflow Y pipe (part # MPE-10758).

[TomoHawk]

the guy is probably lazy or afraid. The first thing he tried to do is to convince me I should just put on the stock muffler. then he said that nothing but a stock muffler will even fit in a vertical orientation. Even a turbo-style! I know Hrududo has a Flowmster in the flat-ways, but the muffler guy just keeps saying that it won't fit.

And then today I noticed the mufler on a newer Grand Prix... :cheeky:

[Dreco]

i'm just running a 3into2 header w/3 inch exhaust... then i'm using a universal Topspeed muffler... little on the loudside, but its sounds amazing..

[madkaw]

I've thought of this too, but my circumstance is unique as you can see. If I can find some glasspacks shorter then 10" I could make if work along my diff but they would have to be skinny. The two in the back are 12", and i could maybe fit some short Borla's if the glasspacks are too loud. I am hoping my crossover will help resonate noise.

[TomoHawk]

One confusing thing that he muffler guy told me was that you can't have the exhaust tips sticking out from under the bumper, because in a collision, the muffler will get crunched ?

One reason why I'd like to replace my muffler is because the fart can does not stick out past the bumper and the bumper is turning black with soot.

BTW- I don't use a header.

thx

[Caen Fred]

I am using an old (new) thunderbird header 3/2/1 into one Dymomax ultraflo 2/1 bullet and the MSA twice pipes...
It's on a stock Auto engine, with smooth euro carbs pipes... Sound nice, what should be done to the SU? Any tricks orthe SU just self adjust to cope for the new task?????

[70z4fun]

Someone would remake that original dual exhaust, it was sold through Nissan, made by Clifford and sold through all sorts of dealers. Even had the optional megaphone replacement section. I think I bought my through Bob Sharp's parts department.

I contacted Clifford Research awhile back about the header and the exhaust system, and they had no interest in it. Maybe someone at MSA could get someone to reproduce it, instead of their current
"twice pipe"

It was loud and used two stock hangers off the diff crossmember with two glasspacks stacked going out the back......chrome tips.... Boy those were the days.

Right now I am running a Clifford header, with a Abarth muffler with twin tips out the back. Sounds ok, but it muffler will need to replaced soon, and it's not like I can get another Abarth muffler anywhere....:smoke: