emissions removal

bigtony08 · 07-07-2009, 05:26 PM

hey guys im looking at a 91 s5 that the emissions removed and the ports are wired open will this hurt anything in the long run also its running a 6a box. also quick question when the emissions are removed does it get rid of the secondary injectors?

djmtsu · 07-07-2009, 07:31 PM

BAM!

http://www.rotaryresurrection.com/2n...s_removal.html

bigtony08 · 07-07-2009, 07:56 PM

but does it hurt anything having them wired open? or do i just lose bottom end

NoDOHC · 07-08-2009, 09:57 PM

Open is better than shut. (When shut, they load up with carbon, awaiting the next opportunity to dump in the engine and kill an apex seal).

Unfortunately, you will lose so much bottom end that you will have a faster 0-60 time with the ports shut than with them open. Obviously, rotary cars aren't any fun if they run out of power around 5500 rpm, so wiring the ports open is the preferred way (even though the car is slower).

You will make significantly less horsepower with the ports shut, but as I mentioned before, your average torque is enough higher that the shut-port acceleration (0-60) is better.

Fully functional ports are definately preferred (or just go 4-port and get it over with).

Flooder · 07-09-2009, 01:09 AM

Oh my god. This subject has always had a lot of misinformation. I removed the emissions on my s5 na, took out the exhaust sleeves and wired my vdi open and there was hardly any difference at all. I had a full exhaust and an intake and the car ran great. It won't hurt anything and it will be a hell of a lot reliable.

And no, you keep all four of your injectors.

bigtony08 · 07-09-2009, 08:40 AM

thank you its the red gxl thats in the sell section thats wht i was wondering. car drives great btw

NoDOHC · 07-09-2009, 11:40 PM

Believe it or not, I actually tested this on my '86 (back when it was a 6-port) and on my '91. The car feels a lot faster with the ports wired open, but it is truly slower (as measured by my G-tech). I didn't believe it at first either, but perceived acceleration can be deceiving.

It might be worth installing an air pump and reconnecting the 5/6 port actuators, it will also help your fuel economy (17 mpg highway wired open vs 23 mpg hwy functioning).

This advice cost you nothing, but it would be a neat project.

N.RotaryTech · 07-10-2009, 05:53 PM

Quote:

Originally Posted by Flooder

Oh my god. This subject has always had a lot of misinformation. I removed the emissions on my s5 na, took out the exhaust sleeves and wired my vdi open and there was hardly any difference at all. I had a full exhaust and an intake and the car ran great. It won't hurt anything and it will be a hell of a lot reliable.

And no, you keep all four of your injectors.

I agree!

Same with my GTU.

On another note:
Gas mileage?
My mileage is great, the trick is in tire pressure.

project86 · 07-11-2009, 11:45 PM

Quote:

Originally Posted by bigtony08

but does it hurt anything having them wired open? or do i just lose bottom end

i have had mine wired open for while now... and yeah you loose a small bit of bottom end.. not really noticeable to me though.

07-07-2009, 05:26 PM	#1
bigtony08 obsessed rotard Join Date: Jan 2009 iTrader: (0) Posts: 249 Rep Power: 16	emissions removal hey guys im looking at a 91 s5 that the emissions removed and the ports are wired open will this hurt anything in the long run also its running a 6a box. also quick question when the emissions are removed does it get rid of the secondary injectors?

07-07-2009, 07:31 PM	#2
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	BAM! http://www.rotaryresurrection.com/2n...s_removal.html __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

07-08-2009, 09:57 PM	#4
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	Open is better than shut. (When shut, they load up with carbon, awaiting the next opportunity to dump in the engine and kill an apex seal). Unfortunately, you will lose so much bottom end that you will have a faster 0-60 time with the ports shut than with them open. Obviously, rotary cars aren't any fun if they run out of power around 5500 rpm, so wiring the ports open is the preferred way (even though the car is slower). You will make significantly less horsepower with the ports shut, but as I mentioned before, your average torque is enough higher that the shut-port acceleration (0-60) is better. Fully functional ports are definately preferred (or just go 4-port and get it over with). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

07-09-2009, 01:09 AM	#5
Flooder Rotary Fanatic Join Date: Feb 2008 Location: Tucson, Arizona iTrader: (0) Posts: 321 Rep Power: 17	Oh my god. This subject has always had a lot of misinformation. I removed the emissions on my s5 na, took out the exhaust sleeves and wired my vdi open and there was hardly any difference at all. I had a full exhaust and an intake and the car ran great. It won't hurt anything and it will be a hell of a lot reliable. And no, you keep all four of your injectors. __________________ AZRX7.COM Red 1991 A-package(SOLD) Red 1990 GXL(SOLD) White 1989 GTUs(DEAD) Red 1988 Turbo II(DD) Black 1988 Turbo II(SOLD) Rebuilt and street ported motor, Garrett T04E Turbo, 3" Turbo Inlet Duct/AEM Dry Flow Filter, Your Mom's MBC, Blitz FMIC, 890cc and 1000cc injectors, Tomei FPR, Walbro, Rtek 2.1 ECU, Taurus E-Fan, Turbonetics BOV, 3" Motoria/Corksport Turbo Back Exhaust, Emissions Removed, Greddy Boost Gauge, Megan Racing Water Temp Gauge, 5one5 Triple Gauge Pod, AEM Uego, GP Sports Body Kit, Fiber Images CF Hood, S5 Seats, S5 Tails, S5 Alt, Dual Alt Pulley, D2 Coilovers, NRG Quick Release, Shook Motorsports Radiator, HID's, AN/Steel Braided Oil Cooler Lines, SUPER JDM TYTE DRIFT BUTTON www.DensetsuMotorsports.com www.AZRX7.Com www.FloodersAdventure.com

07-09-2009, 11:40 PM	#7
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	Believe it or not, I actually tested this on my '86 (back when it was a 6-port) and on my '91. The car feels a lot faster with the ports wired open, but it is truly slower (as measured by my G-tech). I didn't believe it at first either, but perceived acceleration can be deceiving. It might be worth installing an air pump and reconnecting the 5/6 port actuators, it will also help your fuel economy (17 mpg highway wired open vs 23 mpg hwy functioning). This advice cost you nothing, but it would be a neat project. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

07-07-2009, 07:56 PM	#3
bigtony08 obsessed rotard Join Date: Jan 2009 iTrader: (0) Posts: 249 Rep Power: 16	but does it hurt anything having them wired open? or do i just lose bottom end

07-09-2009, 08:40 AM	#6
bigtony08 obsessed rotard Join Date: Jan 2009 iTrader: (0) Posts: 249 Rep Power: 16	thank you its the red gxl thats in the sell section thats wht i was wondering. car drives great btw