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DMSDAK
Dodge Dakota
JOIN HERE
10/19/2002
04:33:10
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 Subject: 4.7L and O2 Simulators!
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Message:
Guys after the dissapointing dyno of 199.1HP Im looking to make some quick hp and Dyno it again. I see they make these things called O2 Simmulators, would these work on my truck? I have two o2 Sensors up front in my pre cats, and one single o2 sensor just before my last cat and thats it.(3 sensors total) Has anyone tried these simulators with the dual o2's up front and single o2 in the rear? Im wanting to take and delete the two pre cats and the third cat and have an exhaust shop fab up me some 2 and 1/4 inch y-pipes and have them dump into my current Flowmaster 3'' cat back! Would this free up some HP you think?
_________________
2001 Dodge Dakota FR RC
Sport+ Dodge Motorsports Edition
230HP 4.7L SOHC V8
5-Speed
3.92 Rear Peg-Leg
Flowmaster Force II 3'' Catback-
w/3'' slash cut chrome tip
AirAid Quik-Fit Air Intake System
Matching Hard Tonneau Cover
OEM Fender Flares Added
Rino-Liner
Racing Pedals
Lakewood H/D Universal Trac-Bars
New Best E/T: 15.3@89.1 @ Clay City!
199.1 RWHP @ 4350 RPM's
276.4 RWTRQ @ 3200 RPM's
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BlackDak02
*GenIII*
10/19/2002
09:44:29
|  RE: 4.7L and O2 Simulators!
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Message:
Dunno, but you should change your sig from SOHC to DOHC unless you're only running one bank of cylinders, LOL. 4.7's have two cams, as I'm sure you are aware of this. No flame just trying to help, good luck with your mods.
2002 Black CC SLT 4x4
4.7L 45RFE 3.55 LSRD
"Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has."
Descartes
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Waltherone
Dodge Dakota
JOIN HERE
10/19/2002
09:49:47
|  RE: 4.7L and O2 Simulators!
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Message:
I thought DOHC implied 4 valves per cylinder?
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CW
GenIII
10/19/2002
09:50:06
|  RE: 4.7L and O2 Simulators!
IP: Logged
Message:
Still a SOHC though because there is only one cam above each head 2 total. Toyotas 4.7 is a DOCH with 2 cams above each head 4 total.:)
4.7 HO, CW style
2001 4.7 5sp 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" Z-tube, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams, Robert shaw 180 therm, HO intake manifold.
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CW
GenIII
10/19/2002
10:07:21
| RE: 4.7L and O2 Simulators!
IP: Logged
Message:
It would free up some HP and some revability. How much I can't say.
4.7 HO, CW style
2001 4.7 5sp 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" Z-tube, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams, Robert shaw 180 therm, HO intake manifold.
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BlackDak02
*GenIII*
10/19/2002
10:29:08
|  RE: 4.7L and O2 Simulators!
IP: Logged
Message:
 My apologies, I assumed DOHC stood for 'dual overhead cam', never worked on one, and you know what happens when you assume, this time it was just me however, ha-ha. 
Glossary: Dual Overhead Cam
Also called Double Overhead Cam (DOHC). This is an engine with a pair of cam shafts in the top of the cylinder head. The first operates the intake valves, while the other operates the exhaust valves.
*shutting up and sitting down*
2002 Black CC SLT 4x4
4.7L 45RFE 3.55 LSRD
"Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has."
Descartes
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BlackDak02
*GenIII*
10/19/2002
10:34:44
|  RE: 4.7L and O2 Simulators!
IP: Logged
Message:
Ha-ha, as an afterthought, I'd better change my sig, it seems that I have lost what little that I had. 
2002 Black CC SLT 4x4
4.7L 45RFE 3.55 LSRD
"Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has."
Descartes
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Waltherone
Dodge Dakota
JOIN HERE
10/19/2002
11:11:46
| RE: 4.7L and O2 Simulators!
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Message:
hah
OWNED :)
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dweishaar
GenIII
10/19/2002
12:57:25
| RE: 4.7L and O2 Simulators!
IP: Logged
Message:
you sure about that sensor in front of your 3rd cat? i didn't have one, ony the two behind the precats.
One Eyed Fox
The Baja Dak
Have you jumped a dak..........lately?
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DMSDAK
Dodge Dakota
JOIN HERE
10/19/2002
14:18:15
| RE: 4.7L and O2 Simulators!
IP: Logged
Message:
Yes Im 100% sure about it being there. When I installed my cat back system I really took a good look at the exhaust system to see what other improvements could be made. Some guys say that they have one after the last cat but mine has two directly in the middle of each of the two precats and just before the third cat!
_________________
2001 Dodge Dakota FR RC
Sport+ Dodge Motorsports Edition
230HP 4.7L SOHC V8
5-Speed
3.92 Rear Peg-Leg
Flowmaster Force II 3'' Catback-
w/3'' slash cut chrome tip
AirAid Quik-Fit Air Intake System
Matching Hard Tonneau Cover
OEM Fender Flares Added
Rino-Liner
Racing Pedals
Lakewood H/D Universal Trac-Bars
New Best E/T: 15.3@89.1 @ Clay City!
199.1 RWHP @ 4350 RPM's
276.4 RWTRQ @ 3200 RPM's
|
slow2dak
Dodge Dakota
JOIN HERE
10/19/2002
18:08:28
| RE: 4.7L and O2 Simulators!
IP: Logged
Message:
just to let u guys know, on any truck that has precats, there are 4 o2 sensors, 2 upstreams before the cats, and 2 downstreams, after the cats.
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