Author Topic: Low Range Off Road 22R Reproduction/Replacement Carb  (Read 7936 times)

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fireitup

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Haven’t had a chance to follow up on anything as we have been prepping for our Easter crawfish boil. Did get a nice shot of the truck the other morning when I was out picking up a yard of mulch.



Also, truck drove great with a full load!


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82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

H8PVMNT

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I want to go to a crawfish boil!
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

fireitup [OP]

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I want to go to a crawfish boil!

 You are welcome anytime!


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82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

fireitup [OP]

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1st tank in the books.  15.3 MPG.

70% Commute
30% City

~15miles of driving with a full load of mulch in the bed.

Feel like i should be doing a bit better than this.  My commute is very flat and easy across the Lake Pontchartrain Causeway.  A couple of hi-rises in the bridge to allow ships to pass but that's about it. Although some days I do have to battle a mean headwind when heading southbound across the lake.



Will check on timing and tire PSI this evening.
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kaalsb

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You should be doing a lot better than that. Regardless of whether i drive like my grandma or with the pedal to the mat everywhere, i get 20 mpg. Sitting on the highway for hours and draining a whole tank i get 20, or commuting around the city for a week i get 20.
Thats with 22r turning 35” tires with 5.29’s

redneckcustoms13

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Have to factor for elevation and humidity. Best a 22r gets in mobile al is 18 that's no ps, no ac, 4.37 gear and 31s. My 3rz swap gets 14-15. It's the sea level thing.
83 long bed 2wd sas, 3rz, w56, duals with 4.7 rear, 4.88 elock front, spartan rear, 39.5 iroks
01 double cab hunting truck
06 tacoma street truck

Gnarly4X

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My 1985 Standard Cab, 22R, DT header, stock cam and carb, opened exhaust, 5-speed, 33’s, 4.10 R&Ps, Lockers front and rear.. got 19 and 20 MPG, on 89 octane, elevation between 1000 and 1700 feet.  I did not baby it.

Gnarls.
1986 XtraCab SR5 22RE 5speed W56B, ~26,000 MI after break-in, DIM (Did It Myself) rebuilt engine - .020" over, engnbldr RV head, OS valves, 261C cam, DT Header. https://imgur.com/oACTHTR

fireitup [OP]

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To review (before I start changing things).

Tank 1
1) Carb: Low Range Reproduction
2) Primary Jet: 120
3) Air: Stock Air Box/Filter
4) Tires: 235x75xR15 Treadwright ATG (Finally getting some miles on these!)
5) 23.5 PSI All Around
6) Timing @ 5 Deg with Vac Advance Cut.

15.3 MPG.

70% Commute
30% City

~15miles of driving with a full load of mulch in the bed.

82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

fireitup [OP]

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Swapping in the high flow Air Filter, butt dyno feels about the same.  Will also pull plugs after this tanks and see whats up there.

Tank 2
1) Carb: Low Range Reproduction
2) Primary Jet: 120
3) Air: Mr. Gasket High Flow Filter
4) Tires: 235x75xR15 Treadwright ATG
5) 23.5 PSI All Around
6) Timing @ 5 Deg with Vac Advance Cut.

16.0 MPG this tank.

90% Commute
10% City
« Last Edit: Apr 10, 2018, 07:31:08 PM by fireitup »
82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

fasterspider

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I run 35psi on the street and 12psi off road
I will continue to run my tires @ 35psi on the street so I dont use every drop of fuel to get to a trail. A half tank of fuel to go 50 miles is ridiculous and that is how much fuel wasted running deflated tires.
23psi is not good for the road, air up and your fuel mileage will increase exponentially.
fasterspider, now older and slower.

fireitup [OP]

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I run 35psi on the street and 12psi off road
I will continue to run my tires @ 35psi on the street so I dont use every drop of fuel to get to a trail. A half tank of fuel to go 50 miles is ridiculous and that is how much fuel wasted running deflated tires.
23psi is not good for the road, air up and your fuel mileage will increase exponentially.

Agreed that 23 psi is low for road use.  I only checked psi after I had started these tests. Once I get through this current tank I plan to air back up to 30psi and see where that gets me.  If I go much higher than that I have trouble getting these tires to flatten out. I think they would be happier on a wider rim.
82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

Gnarly4X

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In my trucks with 30 to 33” tires I run 25 psi in the front and 20 in the rear...  That is my usual daily street pressure.  If I haul something like a 4-day camping trip to the dunes, I air up to 32 / 35.

I have experimented with different tire pressures.  I like the lower pressure for comfort and less road noise and vibrations.  I have always gotten great mileage and good even tread wear out of my tires.  Although it is generally purported to save fuel with higher tire pressure, I have found NO measurable difference in gas mileage between 25/20 and the recommended PSI on the tire spec.

Rock crawling PSI starts at 10.  Mud, snow, sand is typically 4 PSI.

Gnarls.
1986 XtraCab SR5 22RE 5speed W56B, ~26,000 MI after break-in, DIM (Did It Myself) rebuilt engine - .020" over, engnbldr RV head, OS valves, 261C cam, DT Header. https://imgur.com/oACTHTR

fireitup [OP]

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16.0 MPG this tank.

90% Commute
10% City

I’ll contribute the slight increase to more commuting less city this time around.

Aired up the front tires to 32psi and the back to 30.

Will see what the next tank holds. Next up will start playing with the primary jet, which is really what this thread is all about.


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helipilot77

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Thanks for Keeping such a good record. I’m sure this information will help people make the decision.
-1987 SR5 4runner, 1KZ-te turbo diesel with custom 3" S.S. dump pipe, R-151f transmission, marlin dual ultimate transfer cases w/ triple shifter, SAS, 35's https://board.marlincrawler.com/index.php?topic=98969.0
-1984 SR5 Tercel 4wd wagon bone stock - given to my nephew https://board.marlincrawler.com/index.php?topic=100547.0
-1:10 scale RC 4wd crawler w/yota axles, R2 2 speed enclosed dig tranny and 1st gen 4Runner body by BigBird
-My front axle service write-up http://board.marlincrawler.com/i

fireitup [OP]

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Only thing that changed on this one was tire pressure.

Tank 3
1) Carb: Low Range Reproduction
2) Primary Jet: 120
3) Air: Mr. Gasket High Flow Filter
4) Tires: 235x75xR15 Treadwright ATG
5) 32 PSI Front/30PSI Rear
6) Timing @ 5 Deg with Vac Advance Cut.

16.25 MPG

90% Commute
10% City
82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

:)bestgen4runner

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1st tank
Just for example.
1987 4runner
22re with every LCE go fast part money can buy.
Good tune and only 30K miles on rebuild (I did the build)
w56 manual trans
32" tire
5.29 rear gears with Grizzly locker
No lift kit and still IFS
 
19.4 MPG  :biggthumpup:
I am 1/5th of Perfect Fit
SqWADoosh [04:19 PM]: *sigh* I guess Chris is right and I just need to wait until I'm in a place where I have a tow rig and trailer before I get this caliber of truck
Mudder [08:28 PM]:   not try to be a jerk, but are you serious bestgen?
Prismo [06:11 PM]:   Done, time to relax or as Bestgen says....FREEDOM!
HogCanyonHopper [06:54 PM]:   I like my little rod. it gets the job done
H8PVMNT [03:30 PM]: I can go both ways.

Dingman.

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For everyone here, have you verified your mileage based off gps? 

For example, 32” tires and 5.29 gears WILL not be accurate if you calculate your mileage based upon what yor odometer says.

:)bestgen4runner

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For everyone here, have you verified your mileage based off gps? 

For example, 32” tires and 5.29 gears WILL not be accurate if you calculate your mileage based upon what yor odometer says.
Whatever
I am 1/5th of Perfect Fit
SqWADoosh [04:19 PM]: *sigh* I guess Chris is right and I just need to wait until I'm in a place where I have a tow rig and trailer before I get this caliber of truck
Mudder [08:28 PM]:   not try to be a jerk, but are you serious bestgen?
Prismo [06:11 PM]:   Done, time to relax or as Bestgen says....FREEDOM!
HogCanyonHopper [06:54 PM]:   I like my little rod. it gets the job done
H8PVMNT [03:30 PM]: I can go both ways.

EASYRYDERDANGER

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 Yep, told him the same thing, cause he's going slower than his speedo shows, therefore less miles travelled.

H8PVMNT

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When I ran 32" swampers and 5.29s I was going something like 10-12% less miles than my odometer told.  Based on that the 19 mpgs would be in the 17s.
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

:)bestgen4runner

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When I ran 32" swampers and 5.29s I was going something like 10-12% less miles than my odometer told.  Based on that the 19 mpgs would be in the 17s.
I checked it this morning it's 6mph off
I am 1/5th of Perfect Fit
SqWADoosh [04:19 PM]: *sigh* I guess Chris is right and I just need to wait until I'm in a place where I have a tow rig and trailer before I get this caliber of truck
Mudder [08:28 PM]:   not try to be a jerk, but are you serious bestgen?
Prismo [06:11 PM]:   Done, time to relax or as Bestgen says....FREEDOM!
HogCanyonHopper [06:54 PM]:   I like my little rod. it gets the job done
H8PVMNT [03:30 PM]: I can go both ways.

H8PVMNT

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Assuming 65 mph freeway speeds like 9% then?  I ended up using a speedo sender from an '80 with 4.37s last time so with 5.29s and 35s it was dead nuts.
“I would rather wake up in the middle of nowhere than in any city on earth.”
– Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

fireitup [OP]

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Interesting discussion on fuel mileage.  I am mostly stock so don't have to worry about any of that. 

On a different note, I swapped in the 116 Jet that came with this carb and now the float bowl is getting too full.  So I think I accidentally adjusted the float tabs while fiddling in there and havent had time to dial that back in. Also, I was swapping jets with all the choke linkage stuff still attached, and I bent the metering needle attached to the secondary.  I had been able to make this same adjustment on the Aisin carb with no issues, and never bent that needle. After market stuff is probably not as forgiving.

This is just another reason to remove all that choke linkage crap and go manual.  Without the linkage attached you can just lift the float bowl cover straight out and not have to worry about dropping those dumb little hairpin connectors and never finding them again.

82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

fireitup [OP]

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While contemplating how much I hate the Vacuum/E-Choke setup on these carbs, I realized that I had everything laying around my office to make my own variant.  I whipped up a quick manual demo just to prove to myself that this could work.  It would be cool to tap into the coolant temp sensor (or install my own) and automate this based on coolant temp.  If I actually end up going through with that I will devote a thread to it. Just a fun diversion for now!

1) Servo Motor
2) Resistive Touchscreen
3) Arduino UNO Dev Kit
4) Imagination that the Servo is attached to the choke shaft in place of the E-Choke Bi-Metal Coil. Choke itself would be in the same plane as the attached double arm.

Voila!




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zippo

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One could easily add a temp input into the Arduino and make this 100% automated. If you had an electric choke you might could also PWM that to have multiple stages with no motor.
If you see it, its for sale.

EASYRYDERDANGER

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...and then you could use 4 injectors ran off a distributor via an ecu to eliminate the carb. I like where this is going! 

fireitup [OP]

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Metering needle was indeed bent...



Good thing i have a second carb laying around!
82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

fireitup [OP]

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Reason the float bowl was flooding is because the little spring plunger inside the back of the primary metering valve (see pic) had fallen out and was just chilling in the float bowl.



Also, I tried to use the primary metering valve from the Aisin carb in this one and it would not fit.  The diameter was slightly larger than the one that came with the Trail Gear one.
82 Pickup - 22R : OME NitroChargers/Springs : Timing Chain @ 180K

redneckcustoms13

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So basically the $115 ebay would have been the same quality  :screwy: hate to see this from one of the "decent" suppliers.
83 long bed 2wd sas, 3rz, w56, duals with 4.7 rear, 4.88 elock front, spartan rear, 39.5 iroks
01 double cab hunting truck
06 tacoma street truck

helipilot77

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-1987 SR5 4runner, 1KZ-te turbo diesel with custom 3" S.S. dump pipe, R-151f transmission, marlin dual ultimate transfer cases w/ triple shifter, SAS, 35's https://board.marlincrawler.com/index.php?topic=98969.0
-1984 SR5 Tercel 4wd wagon bone stock - given to my nephew https://board.marlincrawler.com/index.php?topic=100547.0
-1:10 scale RC 4wd crawler w/yota axles, R2 2 speed enclosed dig tranny and 1st gen 4Runner body by BigBird
-My front axle service write-up http://board.marlincrawler.com/i

 
 
 
 
 

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