What mods should be done???

closha63 · 11-28-2008, 09:25 PM

Well i purchased my 04 tacoma the beginning of the summer. Since then i have done the gray wire mod and for some reason i took an exhaust from a 2007 tundra and made it fit my truck. Really i think that it sounds better then any FlowMaster and it looks so much better. Am working on the rear diff. mod but i can not find the fitting that screw down into the diff. If anyone has any idea on what size it is that would help. So any ideas on what i could do please advise.

007Tacoma · 11-28-2008, 09:27 PM

I would love to see some pics and maybe a sound clip of your exhaust!

chris4x4 · 11-28-2008, 09:53 PM

Quote:

Originally Posted by closha63

Well i purchased my 04 tacoma the beginning of the summer. Since then i have done the gray wire mod and for some reason i took an exhaust from a 2007 tundra and made it fit my truck. Really i think that it sounds better then any FlowMaster and it looks so much better. Am working on the rear diff. mod but i can not find the fitting that screw down into the diff. If anyone has any idea on what size it is that would help. So any ideas on what i could do please advise.

FWIW, a friend and I built an exhaust useing the muffler from a V8 Tundra to find out what kind of gians it would have as a favor for Ridgerunner. Turns out, it showed a pretty good gain! It gained over 10 h.p. The guy who supplied the truck was happy as a clam!

STLharry · 11-29-2008, 06:13 AM

Quote:

Originally Posted by chris4x4

FWIW, a friend and I built an exhaust useing the muffler from a V8 Tundra to find out what kind of gians it would have as a favor for Ridgerunner. Turns out, it showed a pretty good gain! It gained over 10 h.p. The guy who supplied the truck was happy as a clam!

wow really?
thats sick. closha 63, do you have a 6 cyl? I'm assuming you do because you have a TRD. i have a flowmaster but i was thinking of changing it to something else

tacomaman06 · 11-29-2008, 08:05 AM

go check out my build thread..........................i got my 04 at the beginning of the summer too. there should be some ideas in there for ya...............and the rear diff breather extension...........you need the union fitting from toyota for the diff. it costs about $10 maybe....and here is more info on it, and the part number is in the link also..........

http://www.tacomaworld.com/forum/1st...extension.html

closha63 · 11-29-2008, 08:15 PM

Yeah it a V6. The thing with the exhaust is that instead of using the muffler with the tailpipe i found that the the post exhaust muffled the sound enough to give it the sound i was looking for without the rice burner sound. I found that the engine exhails a lot easier.

chris4x4 · 11-29-2008, 08:26 PM

Quote:

Originally Posted by closha63

Yeah it a V6. The thing with the exhaust is that instead of using the muffler with the tailpipe i found that the the post exhaust muffled the sound enough to give it the sound i was looking for without the rice burner sound. I found that the engine exhails a lot easier.

The main thing with an exhaust, is to maintain the scavenging of the cylynders.

closha63 · 11-29-2008, 08:52 PM

Well the thing with Scavenging is that the exhaust will have little to do with it. Well its more for the emissions part of the vehicle and is greatly effected by a Super/Turbo charger. So manly you can run a straight pipe and it will have little negative effect of the engines performance. And lucky for me a don't have emissions inspections where i live and if i did i would do it myself.. But thats besides the point. So a Scavenging problem will be the least of everyones problem.

chris4x4 · 11-29-2008, 08:56 PM

Quote:

Originally Posted by closha63

Well the thing with Scavenging is that the exhaust will have little to do with it. Well its more for the emissions part of the vehicle and is greatly effected by a Super/Turbo charger. So manly you can run a straight pipe and it will have little negative effect of the engines performance. And lucky for me a don't have emissions inspections where i live and if i did i would do it myself.. But thats besides the point. So a Scavenging problem will be the least of everyones problem.

Not sure Im following you here. Your saying that exhaust scavenging is not important if you are turboed or supercharged, right? And it IS important if you are NA, right?

closha63 · 11-29-2008, 08:59 PM

I am not saying that its not important i am says that yes if not super/turbo it should be taken into consideration but if not super/turbo then nothing to worry about.. Gas prices are more to worry about then that.

chris4x4 · 11-29-2008, 09:00 PM

Quote:

Originally Posted by closha63

I am not saying that its not important i am says that yes if not super/turbo it should be taken into consideration but if not super/turbo then nothing to worry about.. Gas prices are more to worry about then that.

Proof read your post. Your contradicting yourself here.

closha63 · 11-29-2008, 09:10 PM

Scavenging is the process of pull in unburned fuel vapor after the exhaust stroke by valve overlap on the intake stroke. So it kind of goes hand with the EGR valve but now a day that is controled by the ECU and if there is a problem then it will set the MIL on. So on a none NA engine scavenging really wont be a problem because the engine does not reach High RPM's fast enough. If it did there would probably be some floating valves witch is a bigger problem then you want. Now.... NA engine compress force and compress air at a higher rate then an NA engine does. So the fact of over lapping the exhaust valve is not needed do to the fact of the higher compression's. Im not sure if this helps any but it's pretty frickin close to what happens

chris4x4 · 11-29-2008, 09:18 PM

Quote:

Originally Posted by closha63

Scavenging is the process of pull in unburned fuel vapor after the exhaust stroke by valve overlap on the intake stroke. So it kind of goes hand with the EGR valve but now a day that is controled by the ECU and if there is a problem then it will set the MIL on. So on a none NA engine scavenging really wont be a problem because the engine does not reach High RPM's fast enough. If it did there would probably be some floating valves witch is a bigger problem then you want. Now.... NA engine compress force and compress air at a higher rate then an NA engine does. So the fact of over lapping the exhaust valve is not needed do to the fact of the higher compression's. Im not sure if this helps any but it's pretty frickin close to what happens

Scavenging is MOST important on a Normally Asperated engine. It has nothing to do with the EGR valve. This is from one of my posts:
As the piston moves up to evacuate the chamber of exhaust, the valve opens and the exhaust leaves the cylynder in a "pulse". This pulse, since it has mass, is pulling behind it a low pressure zone. This pulse moves down the exhaust as another exhaust valve is opening. As the other valve is opening, the exhaust gasses in its cylynder are now "Sucked" out of the chamber by the low pressure zone behind the first pulse. This cycle repeats. To add, when the exhaust is pulled from the cylynder, a "vaccume" is now formed in it, alowing the Air/fuel charge to be "pulled" into the cylynder. and on and on. With VVT this is kept pretty constant thru the rpm range. ANy changes in the exhaust system have an affect. Some better, many worse.

Now, when turbo/supercharged, scavenging does not play as important of a role, as the air is forced into the combustionchamber, and the exhaust is "pushed" out of it, so in that case, a larger, free flowing exhaust would be benaficial.

closha63 · 11-29-2008, 09:21 PM

hOW IS THIS KNOWN?

chris4x4 · 11-29-2008, 09:39 PM

Quote:

Originally Posted by closha63

hOW IS THIS KNOWN?

Its how an engine works.

007Tacoma · 11-30-2008, 06:26 AM

Quote:

Originally Posted by chris4x4

Scavenging is MOST important on a Normally Asperated engine. It has nothing to do with the EGR valve. This is from one of my posts:
As the piston moves up to evacuate the chamber of exhaust, the valve opens and the exhaust leaves the cylynder in a "pulse". This pulse, since it has mass, is pulling behind it a low pressure zone. This pulse moves down the exhaust as another exhaust valve is opening. As the other valve is opening, the exhaust gasses in its cylynder are now "Sucked" out of the chamber by the low pressure zone behind the first pulse. This cycle repeats. To add, when the exhaust is pulled from the cylynder, a "vaccume" is now formed in it, alowing the Air/fuel charge to be "pulled" into the cylynder. and on and on. With VVT this is kept pretty constant thru the rpm range. ANy changes in the exhaust system have an affect. Some better, many worse.

Now, when turbo/supercharged, scavenging does not play as important of a role, as the air is forced into the combustionchamber, and the exhaust is "pushed" out of it, so in that case, a larger, free flowing exhaust would be benaficial.

So... I'm confused. Does this mean that it is better for me to get a high-flow exhaust, or to keep my stock setup? I have heard people say that going to high-flow drops their MPG, but I don't know if that is because of the lead foot syndrome or it is the actual dynamics of the system...

chris4x4 · 11-30-2008, 06:39 AM

Quote:

Originally Posted by 007Tacoma

So... I'm confused. Does this mean that it is better for me to get a high-flow exhaust, or to keep my stock setup? I have heard people say that going to high-flow drops their MPG, but I don't know if that is because of the lead foot syndrome or it is the actual dynamics of the system...

It depends on the system. I havent had a chance to test all exhaust systems, but I have found that the Dynomax super turbo has given the highest h.p. gain so far. Im tired and on my first cup-O-coffee, but iirc, the Dynomax gave an 8 hp gain. Flowmast lost hp, magnaflow gave a few. The reason for the loss in mpg most of the time is due to less efficiency of the system. A high flow exhaust may give more hp on the top, but since the timeing of the exhaust is screwed up, a loss occurs at the bottom end, which is where most people are in when driveing. There is more to it than just scavenging as well. Size can play a role. If you go too large a diameter, the exhaust pulses loose velocity, and cool too fast, throwing the scavenging off. On new vehicles, there reall is more to it than just throwing an exhaust on and saying you got a bizzillion more hp. The phisics of an engins efficiency start at the intake, and work all the way to where the exhast exits. I tried to do a write up, but the post was too long, and the site wouldnt accept it. At which point I said "screw it". Maybe I will give it another go today and just make 2 entries.

11-28-2008, 09:25 PM	#1
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	What mods should be done??? Well i purchased my 04 tacoma the beginning of the summer. Since then i have done the gray wire mod and for some reason i took an exhaust from a 2007 tundra and made it fit my truck. Really i think that it sounds better then any FlowMaster and it looks so much better. Am working on the rear diff. mod but i can not find the fitting that screw down into the diff. If anyone has any idea on what size it is that would help. So any ideas on what i could do please advise.

11-28-2008, 09:27 PM	#2
007Tacoma Moderator; TW Moderator Joined: Jan 2007, #643 Location: San Antonio, Texas Age: 27 Gender: Guy Posts: 5,823 08 PreRunner SR5 DoubleCab LongBed BSP 2008 Double Cab Automatic 4.0L TacomaWorld.com Sticker, URD True Cold Air Intake, Debadged, Blackened Headlight Mod, 30% Window Tint, Access LE Tonneau, Bed Mat, OEM Daytime Running Lights + On/Off Switch, Fogs-On-Anytime Mod, Alternating Turn-Signal Mod, Canvas Seat Covers, Pioneer Stereo, iPod Connection, PAC steering wheel remote, Homemade Bike Rack (4 bikes), Firestone Destination ATs 265/75R16, TRD Suspension Upgrade	I would love to see some pics and maybe a sound clip of your exhaust! __________________ 007Tacoma is currently out of the forum and on vacation. If you would like to leave a message for 007, do so here: beep

11-29-2008, 08:05 AM	#5
tacomaman06 Carolina Alliance: Redneck Division Joined: May 2007, #1475 Location: rock hill, sc Age: 29 Gender: Male Posts: 12,530 04 trd tacoma 4x4 v6 double cab 2004 Double Cab Automatic 3.4 v6 vent visors,deck plate mod, gray wire mod, black steelies and emblems, mag-lite mod, wheelers/ome suspension, stainless brake lines,blacked out bumpers(bedliner),dynomax super turbo muffler,cabelas mossy oak seat covers ans camo steering wheel cover....still to come.... afe pro dry s filter..........plus many,many more!!	go check out my build thread..........................i got my 04 at the beginning of the summer too. there should be some ideas in there for ya...............and the rear diff breather extension...........you need the union fitting from toyota for the diff. it costs about $10 maybe....and here is more info on it, and the part number is in the link also.......... http://www.tacomaworld.com/forum/1st...extension.html __________________ i am WILL--my ride=04 tacoma trd 4x4 double cab, v6, auto,deck plate mod, grey wire mod, billy 5100's all the way around,black low-pro uws toolbox, black steelies,blacked out emblems, mag light mod,wheelers/alcan springs, ome 881 coils, braided stainless brake lines, polyurethane bushings,dynomax super turbo/slash cut tip-blacked out,chrome deleted bumpers via herculiner bed liner,color matched bedlinered tailgate, camo seat covers,sockmonkey decals,husky floor liners and still to come....15 inch wheelers steelies and gy wrangler mtr's!!! http://s202.photobucket.com/albums/aa269/tacomaman06/ signature by piercedtiger www.myspace.com/goodolboy1979

11-29-2008, 08:15 PM	#6
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	Yeah it a V6. The thing with the exhaust is that instead of using the muffler with the tailpipe i found that the the post exhaust muffled the sound enough to give it the sound i was looking for without the rice burner sound. I found that the engine exhails a lot easier.

11-29-2008, 08:52 PM	#8
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	Well the thing with Scavenging is that the exhaust will have little to do with it. Well its more for the emissions part of the vehicle and is greatly effected by a Super/Turbo charger. So manly you can run a straight pipe and it will have little negative effect of the engines performance. And lucky for me a don't have emissions inspections where i live and if i did i would do it myself.. But thats besides the point. So a Scavenging problem will be the least of everyones problem.

11-29-2008, 08:59 PM	#10
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	I am not saying that its not important i am says that yes if not super/turbo it should be taken into consideration but if not super/turbo then nothing to worry about.. Gas prices are more to worry about then that.

11-29-2008, 09:10 PM	#12
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	Scavenging is the process of pull in unburned fuel vapor after the exhaust stroke by valve overlap on the intake stroke. So it kind of goes hand with the EGR valve but now a day that is controled by the ECU and if there is a problem then it will set the MIL on. So on a none NA engine scavenging really wont be a problem because the engine does not reach High RPM's fast enough. If it did there would probably be some floating valves witch is a bigger problem then you want. Now.... NA engine compress force and compress air at a higher rate then an NA engine does. So the fact of over lapping the exhaust valve is not needed do to the fact of the higher compression's. Im not sure if this helps any but it's pretty frickin close to what happens

11-29-2008, 09:21 PM	#14
closha63 QuickShift Joined: Nov 2008, #10470 Location: York Springs, PA Age: 22 Gender: Male Posts: 10 04 SR5 TRD 2004 Xtra Cab Manual 3.4L 3'' Though Country Suspension lift, Grey Wire Mod, Cold Air Intake, Tundra TRD Exhaust Tail pipe ( all custom pipe) Sounds real mean!! Huculiner bed protectant, Rear diff. Breather Mod.	hOW IS THIS KNOWN?