mopar 3 B
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Its just like traveling out of Texas and hitting the Oklahoma border. Time stops
gas mileage??
- Thread starter Wrenchero
- Start date
wyrmrider
Well-Known Member
I ran the Mobilgas economy run for Mike Ricker Motors (Nash) Whittier Ca
Flathead 195.6 cu in 6 in a Rambler
t-96 OD trans with light oil
Rear end was taller than 3.08- with OD you got low 2.s not that lots of GM 3 speed AT cars
6.70 15 tires (taxi option- everything had to be stock)
1bbl carb
So a low power tall gear can work
You can try taller tires with less rolling resistance
spoiler helps ( we lowered the rambler to the max they would let us get away with and lowed the front bumper and raised the back on)
but a little rake on your rig
you could try a lock up trans/ converter
If your trans is good most could be used in a 999 rebuild get a core from a 360 with the double wrapped reverse band and more clutches
there are early and later lock up schemes- the first was mechanical (sorta like the effect of a FORD AOD), the second considers load, temp, etc etc
or
OD
get one from a 92-94 Dakota or Pickup
These have the easiest control of lock up and OD
they have a 3 wire connector
I have a V8 518 OD in my 92 Dakota- post back for details if interested- Transgo reprogramming kit
I have the Diesel straight cut gears vs the 30 degree stockers
95 they changed mainshaft sizes and gears changed to a 15 degree but straight cut gears do not fit the later shaft
Flathead 195.6 cu in 6 in a Rambler
t-96 OD trans with light oil
Rear end was taller than 3.08- with OD you got low 2.s not that lots of GM 3 speed AT cars
6.70 15 tires (taxi option- everything had to be stock)
1bbl carb
So a low power tall gear can work
You can try taller tires with less rolling resistance
spoiler helps ( we lowered the rambler to the max they would let us get away with and lowed the front bumper and raised the back on)
but a little rake on your rig
you could try a lock up trans/ converter
If your trans is good most could be used in a 999 rebuild get a core from a 360 with the double wrapped reverse band and more clutches
there are early and later lock up schemes- the first was mechanical (sorta like the effect of a FORD AOD), the second considers load, temp, etc etc
or
OD
get one from a 92-94 Dakota or Pickup
These have the easiest control of lock up and OD
they have a 3 wire connector
I have a V8 518 OD in my 92 Dakota- post back for details if interested- Transgo reprogramming kit
I have the Diesel straight cut gears vs the 30 degree stockers
95 they changed mainshaft sizes and gears changed to a 15 degree but straight cut gears do not fit the later shaft
odcics2
Well-Known Member
HORRIBLE !
Ranger16
Well-Known Member
On the up side, you could always get out and stretch your legs without having to pull over. 
Wrenchero
Active Member
sorry guys.been busy for a while.my 318 has a mopar performance electronic ignition conversion kit.i havent really messed with it.i set inital timing at 6 btdc.i think it has an adjustable vacuum advance should i mess with that
odcics2
Well-Known Member
Yes. For fuel economy, you want maximum vacuum advance, prior to spark knock, at a part throttle tip in.
Having the mechanical advance all in earlier will kill mileage because your vacuum advance has to be dialed way back.
Having the mechanical advance all in earlier will kill mileage because your vacuum advance has to be dialed way back.
JimKueneman
Well-Known Member
Wrenchero
Active Member
thanks.that is very helpful.i have been trying to tune the distributor on my chevy.it can get frustrating.when i am adjusting the distributor,sometimes it pings,sometimes it doesnt.im learning.i will practice on that before i touch the 'good' car.haha.on a 318 what is an approximate total vacuum advance for cruising?
JimKueneman
Well-Known Member
32-34 full mechanical all in by 2800RPM, vacuum +18 for a 50-52 degree full advance.
rumblefish360
Well-Known Member
32* by 2600 rpm, attach the vacuum advance and test for a max of 52*’s.
If you have the adjustable vacuum advance can, it is a 3/32 Allen.
Turn clockwise to decrease timing.
If you have the adjustable vacuum advance can, it is a 3/32 Allen.
Turn clockwise to decrease timing.
rumblefish360
Well-Known Member
LOL, answering the same thing at a minute or so apart.
JimKueneman
Well-Known Member
Depends the the canister if that screw adjusts travel or tension. I made 0.015" shims and shimmed mine.
JimKueneman
Well-Known Member
Mine is a stock 318 with an RV cam and a FiTech. As much as you can run without it kicking back on the starter after a short heat soak. I have the FBO plate that locks it down to about 20 degrees total mechanical advance so I can get about 12-14.
My stock 318 poly with 2 bbl, 2.76 gears did 17-18 on a few trips across the country.
After the rebuild, with a 600cfm Eddy AFB, 3.23 gears it will get 15 to 17. Cruising 65 nets 2200rpms
My 440 with 800cfm AVS, 3.55s gets 9-10 if I am easy...which I am usually not. 65 cruise is 3k rpm.
After the rebuild, with a 600cfm Eddy AFB, 3.23 gears it will get 15 to 17. Cruising 65 nets 2200rpms
My 440 with 800cfm AVS, 3.55s gets 9-10 if I am easy...which I am usually not. 65 cruise is 3k rpm.
Wrenchero
Active Member
thanks guys,i cant tackle it now but i will definitely try it as soon as i get a chance.i work on newer fuel injected cars and there are no adjustments.just put it together and start it up.i need more practice on my old cars.much more fun anyway.old cars have a personality.newer cars are boring!
rumblefish360
Well-Known Member
This ^^^^^^
With the above previously mentioned settings.
odcics2
Well-Known Member
Good question. I always did it by ear. Got a part throttle ping? Back off 2 degrees!
I remember initial being about 5 before TDC.
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