Re: Magnum V8+turbo/OBD1 or 2?
[Re: RTSrunner]
#2740572
02/07/20 04:01 AM
02/07/20 04:01 AM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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The OBD1 will not adapt very much at all, forget putting a turbo on with that system. It will need to be tuned and for that you will need the OBD 2.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: RTSrunner]
#2740734
02/07/20 05:41 PM
02/07/20 05:41 PM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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I have a thread on here in the truck section where I detailed splicing the OBD2 PCM to the OBD1 harness. That's what I'll be using in my 74 W200. It's about 40 wires depending on what accessories you'll be using like cruise, a/c, autotrans, etc. I'll see if I can find it later, it's not hard.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: RTSrunner]
#2740740
02/07/20 05:56 PM
02/07/20 05:56 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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You can make either work, especially since you are going low boost/ low rpm. There are ways to fool the engine with early ecus. Not that it is easy, but it can be accomplished since your not going crazy with grabbing the max power capability. Fuel multipliers and coolant enrichment trickery would be fine with what you are describing (as I understand)
"use it 'till it breaks, replace as needed"
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: TRENDZ]
#2740767
02/07/20 07:50 PM
02/07/20 07:50 PM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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U You can make either work, especially since you are going low boost/ low rpm. There are ways to fool the engine with early ecus. Not that it is easy, but it can be accomplished since your not going crazy with grabbing the max power capability. Fuel multipliers and coolant enrichment trickery would be fine with what you are describing (as I understand) Have you done this? This is a speed density system, no mass air flow sensor. These were never intended for positive plenum pressure, only a vacuum. I don't know of any way to overcome that.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: Guitar Jones]
#2740786
02/07/20 09:28 PM
02/07/20 09:28 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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A single bar map sensor cant read boost. The Ecu wont know there’s boost. A fuel multiplier just increases fuel pressure in a non-linear curve to match the extra air. If the multiplier doesn’t do enough, you just need to momentarily “alter” the cts value to enrich to mixture with pulsewidth from the coolant temp table. These tricks don’t work with high rpm/ high boost. This is ancient tech, but would work with this application.
"use it 'till it breaks, replace as needed"
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: RTSrunner]
#2740863
02/08/20 03:39 AM
02/08/20 03:39 AM
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Joined: Aug 2003
Posts: 43,230 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,230
Bend,OR USA
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Are you going to tow or haul with that truck or is it a driver only empty show type vechicle? If your going to tow or haul some serious weight put a real truck motor in it, like a Cummins 5.9 12 valve or bigger I'm surprised it has a 4 speed in it, I'm assuming it has a two speed rear end in it also, does it?
Last edited by Cab_Burge; 02/08/20 03:41 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: RTSrunner]
#2740868
02/08/20 06:26 AM
02/08/20 06:26 AM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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Here is the link to my OBD I to OBD II thread. I'm still using my NP435 at this point as well but will be swapping in the NV 4500 soon. OBD I to OBD II
Last edited by Guitar Jones; 02/08/20 06:26 AM.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: TRENDZ]
#2740888
02/08/20 09:01 AM
02/08/20 09:01 AM
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Joined: Jan 2003
Posts: 8,028 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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A single bar map sensor cant read boost. The Ecu wont know there’s boost. A fuel multiplier just increases fuel pressure in a non-linear curve to match the extra air. If the multiplier doesn’t do enough, you just need to momentarily “alter” the cts value to enrich to mixture with pulsewidth from the coolant temp table. These tricks don’t work with high rpm/ high boost. This is ancient tech, but would work with this application. I had a problem where I ran around with lots of fox body mustang guys years ago. The things people do to trick the computer was funny. One of the weirdest ones I saw was a dry nitrous kit that applied nitrous pressure to the fuel regulator to close it off and boost the fuel pressure when the nitrous was on. Things like that and the "Boost a pump" that cranked more voltage to the fuel pump. All in the name of not letting the computer know what was going on. That is why I used to be scared of EFI lol.
68 Barracuda Formula S 340
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: Bad340fish]
#2740895
02/08/20 09:39 AM
02/08/20 09:39 AM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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A single bar map sensor cant read boost. The Ecu wont know there’s boost. A fuel multiplier just increases fuel pressure in a non-linear curve to match the extra air. If the multiplier doesn’t do enough, you just need to momentarily “alter” the cts value to enrich to mixture with pulsewidth from the coolant temp table. These tricks don’t work with high rpm/ high boost. This is ancient tech, but would work with this application. I had a problem where I ran around with lots of fox body mustang guys years ago. The things people do to trick the computer was funny. One of the weirdest ones I saw was a dry nitrous kit that applied nitrous pressure to the fuel regulator to close it off and boost the fuel pressure when the nitrous was on. Things like that and the "Boost a pump" that cranked more voltage to the fuel pump. All in the name of not letting the computer know what was going on. That is why I used to be scared of EFI lol. Thats sort of what the fuel multiplier does. It is basically a fuel pressure regulator that raises fuel pressure at a rate that is higher than 1:1. Vortech makes them. They are part of some of their low boost kits.
"use it 'till it breaks, replace as needed"
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Re: Magnum V8+turbo/OBD1 or 2?
[Re: Cab_Burge]
#2741343
02/09/20 07:27 PM
02/09/20 07:27 PM
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Joined: Nov 2003
Posts: 1,881 Pittsburgh,PA
RTSrunner
OP
top fuel
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OP
top fuel
Joined: Nov 2003
Posts: 1,881
Pittsburgh,PA
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Are you going to tow or haul with that truck or is it a driver only empty show type vechicle? If your going to tow or haul some serious weight put a real truck motor in it, like a Cummins 5.9 12 valve or bigger I'm surprised it has a 4 speed in it, I'm assuming it has a two speed rear end in it also, does it? Cab,Yes it has a 2-speed axle with 5.83/8.11 ratios,well I have an original to swap back in anyway.It has what appears to be a non original single speed in it now. I'm not opposed to a Cummins swap but with the NP435 trans and it's small block bellhosing that has the rear motor mounts the Magnum is an easy install. Plus I just got a '98 Cummins Ram 2500 as a driver,so that will be the tow rig.This cabover would just be a local fun/cool driver. However if I find a Cummins V903 I may slate that for a later swap,I just think that would be very different and cool
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