Mufflers: Borla vs Magnaflow+Resonator
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Re: Mufflers: Borla vs Magnaflow+Resonator
Hi Elvin. Do we have a part number on the resonator or the muffler
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Re: Mufflers: Borla vs Magnaflow+Resonator
I have a Borla I'll sell at cost. Don't care for the fit. pm or email jt
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Re: Mufflers: Borla vs Magnaflow+Resonator
A tiny bit OT but it relates...
Anybody been to the Two Stroke Extravaganza that takes place near Sylmar or Santa Clarita? At noon, everyone starts up thier two strokes and revs thier engines.. “Smoke out at Noon!†its announced. Oil, smoke, un burnt fuel everywhere in a public park.. not sure how they get away with something like that.
It was really cool to be able to see each bike in action. Some really rare race bikes are demo as well, exotic four cylinder smokers, and some oddities. Somebody usually get carried away and does a burn out or two.
“Datsuns...start your engines!!!â€
Anybody been to the Two Stroke Extravaganza that takes place near Sylmar or Santa Clarita? At noon, everyone starts up thier two strokes and revs thier engines.. “Smoke out at Noon!†its announced. Oil, smoke, un burnt fuel everywhere in a public park.. not sure how they get away with something like that.
It was really cool to be able to see each bike in action. Some really rare race bikes are demo as well, exotic four cylinder smokers, and some oddities. Somebody usually get carried away and does a burn out or two.
“Datsuns...start your engines!!!â€
- ppeters914
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Re: Mufflers: Borla vs Magnaflow+Resonator
Revisiting.....
Both alvin's old and new systems do not route over the rear axle. Looks very clean plus more direct route. Is over the rear axle necessary, or was this because of Alvin's non-stock engine and suspension?
Is a resonator necessary? What about moving the muffler back behind the rear axle where the resonator normally resides, which would eliminate the heat and noise directly under the driver? If possible, does eliminating the resonator change the muffler requirements?
Thanks,
Both alvin's old and new systems do not route over the rear axle. Looks very clean plus more direct route. Is over the rear axle necessary, or was this because of Alvin's non-stock engine and suspension?
Is a resonator necessary? What about moving the muffler back behind the rear axle where the resonator normally resides, which would eliminate the heat and noise directly under the driver? If possible, does eliminating the resonator change the muffler requirements?
Thanks,
Pete
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
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Re: Mufflers: Borla vs Magnaflow+Resonator
One issue when having a pipe under the axle is that, if you jack up the car on the body, the axle can drop down and rest on the exhaust. Does on mine, so I try to lift the car by the diff. I have a Dynomax turbo with a monza tip. It's a nice rumble that's not too loud and never raspy. My carbs can be louder.
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
Tacoma, WA
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Re: Mufflers: Borla vs Magnaflow+Resonator
Hi Pete,ppeters914 wrote: ↑Tue Jul 05, 2022 6:09 pm Revisiting.....
Both alvin's old and new systems do not route over the rear axle. Looks very clean plus more direct route. Is over the rear axle necessary, or was this because of Alvin's non-stock engine and suspension?
Is a resonator necessary? What about moving the muffler back behind the rear axle where the resonator normally resides, which would eliminate the heat and noise directly under the driver? If possible, does eliminating the resonator change the muffler requirements?
Thanks,
The exhaust was routed under axle because of the 4-link suspension. It's designed to have clearance at full droop.
I've seen it routed under axle on a few stock-suspension roadsters as well.
A resonator is not necessary. The area where the stock resonator resides is between the leaf spring and fuel tank. A standard, oval-style muffler will not fit in this space laying flat. I've seen a few mounted vertically like on an S30.
Alvin Gogineni
San Jose, CA
1967.5 SPL/SR20
1997 Acura Integra GS-R
2022 Chevy Bolt EUV
zcarblog.com
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San Jose, CA
1967.5 SPL/SR20
1997 Acura Integra GS-R
2022 Chevy Bolt EUV
zcarblog.com
YouTube
My SR20 Build Thread
- ppeters914
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Re: Mufflers: Borla vs Magnaflow+Resonator
Hi Greg,Gregs672000 wrote: ↑Tue Jul 05, 2022 10:40 pm One issue when having a pipe under the axle is that, if you jack up the car on the body, the axle can drop down and rest on the exhaust. Does on mine, so I try to lift the car by the diff. I have a Dynomax turbo with a monza tip. It's a nice rumble that's not too loud and never raspy. My carbs can be louder.
Do you have just the Dynamic muffler or a resonator, too? Pics?
Pete
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
- ppeters914
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Re: Mufflers: Borla vs Magnaflow+Resonator
Hi Alvin,Alvin wrote: ↑Tue Jul 05, 2022 11:59 pmHi Pete,ppeters914 wrote: ↑Tue Jul 05, 2022 6:09 pm Revisiting.....
Both alvin's old and new systems do not route over the rear axle. Looks very clean plus more direct route. Is over the rear axle necessary, or was this because of Alvin's non-stock engine and suspension?
Is a resonator necessary? What about moving the muffler back behind the rear axle where the resonator normally resides, which would eliminate the heat and noise directly under the driver? If possible, does eliminating the resonator change the muffler requirements?
Thanks,
The exhaust was routed under axle because of the 4-link suspension. It's designed to have clearance at full droop.
I've seen it routed under axle on a few stock-suspension roadsters as well.
A resonator is not necessary. The area where the stock resonator resides is between the leaf spring and fuel tank. A standard, oval-style muffler will not fit in this space laying flat. I've seen a few mounted vertically like on an S30.
Why did you a add a resonator? Are you still happy with this setup, or would you do something different?
Pete
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
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Re: Mufflers: Borla vs Magnaflow+Resonator
I run a very small Flowmaster straight through muffler on my 2000. When I had the exhaust system built I had a flange installed just aft of the axle. Then I had two tips made, one with a resonator and one without. I initially started with the non resonator tip, and while it sounded good it also had a lot of popping and crackling on deceleration. I figured that was going to get me in trouble with the neighbors as well as the police. The resonator tip got rid of 95% of the popping and slightly mellowed the sound. Quality of sound is subjective, so going by what somebody else did without hearing it first is somewhat of a crapshoot.
Mike M
Old enough to know better, too old to remember why!
1969 2000 solex mine since 1972, under resurrection. (Finally resurrected as of spring 2019!)
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Old enough to know better, too old to remember why!
1969 2000 solex mine since 1972, under resurrection. (Finally resurrected as of spring 2019!)
1969 Porsche 911s -worth more, but not as valuable! Gone!
2017 Lotus Evora 400 - Oh my!!
- Gregs672000
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Re: Mufflers: Borla vs Magnaflow+Resonator
Pete, I don't have any pics at the moment, but the routing is pretty much what you see with Alvin's, just not as nice (not SS or mandrel bent). The Monza tip is a single and is a small glass pack. I think it makes an important sound difference. As I recall it's 2.25 through the frame (frame holes widened) and 2.5 after, non stock mounts and the flex pipe was moved to the middle of the X instead of just past the header due to the mounting choices made (size is probably overkill, but it doesn't vibrate). I REALLY like the sound... it's a deep rumble for a 4 cylinder. It only pops when my fuel settings are too lean on deceleration, and matches up well with the induction sound. I am comfortable driving through camp grounds etc because it's not obnoxious, and does not get raspy at WOT. I would not call it quiet, but it's a pleasant sound.
Greg Burrows
'67 2000 #588
Tacoma, WA
'67 2000 #588
Tacoma, WA
- Alvin
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Re: Mufflers: Borla vs Magnaflow+Resonator
A few pictures of under-axle exhaust routing:
viewtopic.php?p=202206#p202206
viewtopic.php?p=202206#p202206
Alvin Gogineni
San Jose, CA
1967.5 SPL/SR20
1997 Acura Integra GS-R
2022 Chevy Bolt EUV
zcarblog.com
Instagram
YouTube
My SR20 Build Thread
San Jose, CA
1967.5 SPL/SR20
1997 Acura Integra GS-R
2022 Chevy Bolt EUV
zcarblog.com
YouTube
My SR20 Build Thread
- ppeters914
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- Joined: Mon Jun 28, 2004 5:51 pm
- Location: Lake Forest Park, WA (just north of Seattle)
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Re: Mufflers: Borla vs Magnaflow+Resonator
Mine is just a stock 3-main R16 w/ SU's and header (brand unknown). Except for the header, the system that came w/ the car was basically I-just-bought-a-welder crappy welds and old school Cherry Bomb-style mufflers. The piping and mufflers went to metal recycling.
A little rumble and not raspy (IMO the Datsun equivalent to crappy VW) w/o setting off alarms, campers, and neighbors is exactly what I'm looking for. I figure adding a flex pipe and using 1-3/4 or 1-7/8 piping should be adequate. Just need to decide on muffler and resonator (or maybe no resonator).
A little rumble and not raspy (IMO the Datsun equivalent to crappy VW) w/o setting off alarms, campers, and neighbors is exactly what I'm looking for. I figure adding a flex pipe and using 1-3/4 or 1-7/8 piping should be adequate. Just need to decide on muffler and resonator (or maybe no resonator).
Pete
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle
-------------------------------------
'67 1600 - frame off started in 2014. Now I know why roadster projects take so long. What a stupid idea.
'66 1600 - parts car
'66 WPL411 ***SOLD***
A couple of Porsches, a RAV4 Hybrid, and a motorcycle