I was going to put a 2 1/4 cherry bomb glass pack in place were the muffler was, but wouldnt a staight pipe do the same since Im not changing anythibg else. Plan on keeping the resonator. I know someone has done a delete but did a exhaust dump after the cats and had horrible results because of the lost of back pressure. Im only removing the muffler, but keeping everything else.
Muffler delete?
- Thread starter do92fj80
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Why are you deleting the muffler but keeping the resonator? What's the goal here? 
Mine is currently cut off behind the cats until i put the truck back togther. If anything I got a tiny bump in performance. It sounds like a chainsaw in a blender when you get on it though.
I ran my exhaust cut off after the cats for about a year... Power was fine but it was LOUD!!! I don't think the stock resonator is worth a crap but I'm running a resonator out of a 2008 VW GTI as my only "muffler" and I think it sounds great. Not too loud but really throaty.
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- #5
was going to add a cherry bomb to change the tone. Heard they sounded good on the 3fe. But I know that there is not much difference from running a straight pipe when done on a v8. Just wanted to see if the case would be the same here.
I may have driven for a few weeks with the Y downpipe unbolted. Possible.
And it may (or may not have) been extremely loud, mostly just on start up or if I broke 2k RPM. Idling and low throttle was surprisingly quiet.
Yeah the stock resonator basically reduces/eliminates the fake turbo whine and that's about it.
I'd like to add a resonator to mine to help quiet it down a bit and reduce the whine.
I've also heard that cherry bombs sound pretty good, but they are loud. They're quieter than a straight pipe, for sure.
If you don't care about noise, do a straight pipe, but you don't really gain anything by eliminating the muffler.
A couple of years ago I caught the oem muffler on an obstacle, dented it and ripped open the pipe where it connected. So I had the exhaust shop weld in a magnaflow or something. Two days, and a half a bottle of Advil later I had them dig my old muffler out of the scrap heap and weld it back on. IMHO the "throatyness" and virtually un-noticable increase in hp isn’t worth the headache that comes with it.
I did leave the resonator in the scrap pile out of necessity, but I've gotten to the point that I kinda like the "fake turbo whine"
I did leave the resonator in the scrap pile out of necessity, but I've gotten to the point that I kinda like the "fake turbo whine"
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Other than getting rid of the sheer bulk of the huge stock muffler (its pretty heavy for a muffler), I think you may also gain a shred hp eliminating it. I mainly did it because I wanted simplicity and less pipe under there. I probably eliminated 30lbs of muffler/hangers/shields/pipe. I dont care about noise. Its really not that bad IMO. But I did construction for 10 years, so I am used to constant noise.
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- #9
Installed a generic turbo muffler this past weekend and like how it sounds. Not loud at all but enough that at idle it rumbles nicely. Instal plus muffler ran me 100 total. Dont thinkk that was too bad, plus picked up a little power too. Think that headers will be next.
But thought about maybe porting the manifolds myself insted to keep cost downp. Think that might help power a little more?
But thought about maybe porting the manifolds myself insted to keep cost downp. Think that might help power a little more?
From what I have read the stock manifolds are a really good design, and adding a header wont give you much, if any, performance increase.
Headers on a 3FE have a history of horror stories. Do some research before you commit. No gain with a lot of pain.
Trying to get a real increase in power from a 3FE with bolt-ons is like trying to get water from stone. It's not going to happen unless you fabricate a turbo.
Your best bet is to make sure all systems are running at their best, including having the throttle body and injectors cleaned and balanced. Baseline tune up with OEM parts is the way to go and don't forget the valve adjust.
https://forum.ih8mud.com/80-series-tech/270758-general-3fe-tune-up-info.html
155 bone crushing horses pushing a 5-6K pound vehicle with the aerodynamics of a brick is what you're working with. Sit back, relax, and enjoy the ride.
Trying to get a real increase in power from a 3FE with bolt-ons is like trying to get water from stone. It's not going to happen unless you fabricate a turbo.
Your best bet is to make sure all systems are running at their best, including having the throttle body and injectors cleaned and balanced. Baseline tune up with OEM parts is the way to go and don't forget the valve adjust.
https://forum.ih8mud.com/80-series-tech/270758-general-3fe-tune-up-info.html
155 bone crushing horses pushing a 5-6K pound vehicle with the aerodynamics of a brick is what you're working with. Sit back, relax, and enjoy the ride.
Am considering resonator delete and tucking tucking the tail pipe out of the way while she's having the HG done. I can wait to do more to the exhaust (larger pipes, change muffler, etc) but at least want that pipe outta the way, maybe sound better, maybe not, and cheap.
I have a high flow cat, no muffler and the stock resonator... I have other things to worry about, so I'm not changing it, but I will eventually. Power is good, but the sound isn't. It's ok, just nothing like when it had a flowmaster on there. (Like my 3fe) I would put something else up there.
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- #14
all Im after is to make the engine more efficient. I know it is limited on power but there is still some potential. After the muffler I put in 91 octane and felt a good increase in power and my mpg avrged 13.5 from 12. Makes me think about raising the compression a little and maybe some light porting.
If you run premium you can bump the compression a few degrees up. You will about break even on cost of premium vs better fuel mileage, but the extra power is nice.
You'll get about as much extra power from running higher compression and premium fuel as you will from an entire new free flowing exhaust (in other words, not much). And it's basically free power, where as a whole new exhaust isn't cheap.
You'll get about as much extra power from running higher compression and premium fuel as you will from an entire new free flowing exhaust (in other words, not much). And it's basically free power, where as a whole new exhaust isn't cheap.
I'm with JohnHeld on this one, like water from a stone. If "all" your after is to make the engine more efficient, the exhaust isn't going to do that alone. The 91 octane helped you more. IME, all engine mods are bang 4 buck, and eventually point at the original Mission Statement. If raising the compression gains you 10% power and costs you 1000USD, that's 50$/HP. If porting gains you 1%, and costs you 100, that's 50$/HP. It's cheaper $/HP to put on a SC or a turbo kit.
"Feeling" power is deceiving, butt dynos are notoriously uncalibrated. Start a thread, but baseline it with some data, that will help you and others understand the trade-offs. Playing with a N/A truck? Best bang4buck is the timing. Toyota is known to be very conservative on timing maps, and the tables are linear to baseline = change baseline timing when running higher octane fuels (BTDT).
Exhausts? See my thread... You will be exchanging noise for 'feeling' faster using a glasspack. Is a glasspack quieter than just deleting the rear resonator and dumping the pipe? BTDT, it's 'quieter', like a 20guage shotgun is quieter than a 16guage. And on a N/A stock engine, increasing exhaust flow on a motor tuned for torque, *on a dyno* usually shows a slight bump in HP at the expense of a decrease in torque.
If your exhaust is failing, you can start down the slippery slope, btdt. If the exhaust is just not loud enough, you can start down the slippery slope, but climbing back is expensive. The easiest thing to do, is leave it alone, and save your money for the SC or the turbo, which will then cause the exhaust to fail... Then start the slippery slope out of necessity, not theoretical desire..
HTH, IME, IMO
Scott J
94 FZJ80 Supercharged 3in downpipe back
https://forum.ih8mud.com/80-series-tech/538482-sumotoy-multiple-exhaust-installs-long.html
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- Thread starter
- #20
I just put in a generic turbo muffler, and Im happy with the results. If raising the compression wont help much then I guess Its something I will avoid doing. I was going to get the head rebuilt when I do the head gasket. Speaking about timing, everytime the battery is disconnected the timing will reset back to factory setings or will it stay advanced?