pearljam724
Well-Known Member
Its all bone stock. It’s a 2.76, I crawled under there and checked the tag on the differential a day or two after I bought it. That was the first thing I checked. It has a 7 - 1/4 rear end too. Lol !
4 barrels and intakes are over rated on street cars
- Thread starter pearljam724
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dartfreak75
Restore it, Dont part it!
I had a 78 dodge Aspen 318 2bbl lean burn. And that was a hot little 318 I don't know the gears or anything but that little car would scream I drove it in high school and would smoke v6 Camaros and v6 mustang's back then. I beat a guy in a 80s iroc z Camaro too. The z28s and mustang GTs would get me tho. I always wanted to pull that engine and build it for my dart but ended up selling the car to buy my 72 barracuda
cudavert
DARTAHOLIC
The 2-barrel setup probably rips your head off nicely outta the hole, but a TQ keeps the party going after 4K.
pearljam724
Well-Known Member
I like that analogy, lol !
were there ever any that weren't. LOL
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MopaR&D
Nerd Member
You might have gotten lucky with one that stacked the tolerances on the "tight" side from the factory. I had a 1988 Fifth Avenue with the roller-cam 318, first chopped the exhaust and put duals off the stock manifolds. Then swapped the rear to a 8 1/4" with 3.07 gears (upgrade from 2.21 stock). I converted it to 4-bbl with a TQ after those mods to see how much difference it actually makes without being limited by gears and exhaust and I'd say it's worth it on a street car. Merging onto the freeway around here where the speed limit is 75 mph takes a little oomph and the 4-bbl really helped in the 2500-4500 rpm range where the engine spends most of its time cruising or passing at those speeds with that gearing (and no overdrive of course). That car routinely averaged 20 MPG btw with my heavy foot.
It was a pain in the *** to convert the 360 in my truck to 4-bbl (awkward to work on and engine was dirty) but it was definitely worth it for the same reasons. I don't use the secondaries much but they're really nice to have when I need them and this lightly-used Edelbrock 1406 has so much better driveability than the old POS Holley 2-bbl anyway.
I could see a 2-bbl being adequate driving mostly in places with slower speed limits and having shorter gearing but from the few I've driven with tall gears it kinda sucks. I suppose being at 5000+ feet above sea level has something to do with it too.
It was a pain in the *** to convert the 360 in my truck to 4-bbl (awkward to work on and engine was dirty) but it was definitely worth it for the same reasons. I don't use the secondaries much but they're really nice to have when I need them and this lightly-used Edelbrock 1406 has so much better driveability than the old POS Holley 2-bbl anyway.
I could see a 2-bbl being adequate driving mostly in places with slower speed limits and having shorter gearing but from the few I've driven with tall gears it kinda sucks. I suppose being at 5000+ feet above sea level has something to do with it too.
512Stroker
We are all here because we are not all there.
It's all HP to weight ratio X gearing.
pearljam724
Well-Known Member
Bud, you can squeeze 500 horsepower out of a 360. Mine’s just not a good example of that.were there ever any that weren't. LOL
pishta
I know I'm right....
buddy had a 68 Stang with a stock 302, C4 and headers...with a 287 CFM 2bbl? Thing lit 'em up and ran great with 2 guys in it. put another 2 in the back and it was a different animal. 2bbls rated differently than 4bbls. as I recall that stang could rev to 5500 easily.
Cuda416
Well-Known Member
I had a buddy who ran a 70 gutlass back in the day. Had a 500 cfm two barrel... that thing was really fun and surprised a lot of people off the line. Lot's of CFM and low end velocity. I'd love to get my hands on another one just for fun.
Where did you get those gears? I have never heard of that ratio....3.21, sure.
Yes, 3.21’s are a stock gear for an 8-1/4.
were there ever any that weren't. LOL
Yeah. The 78 Lil Red express truck was the fastest domestic "car" that year, beating out even the Corvette.
Not without either aftermarket heads or A LOT of work on the stock ones.
pearljam724
Well-Known Member
What do you think I meant by squeezed ? A stock engine ? Lol !
A dead stock engine can do pretty good and within reason, deliver a good punch in performance so long as the foundation (short block) is in good shape even if the compression ratio is a bit low.
A reasonably selected cam duration (w/high lift) and high flowing heads will carry a smog motor a long way. A reduction in cylinder head cc from a factory delivered 72cc’s (360) down to 65 or 63 as a few of the after market heads are born with help a good bunch. And you can always mill them down more of need be.
The above is not a big secret but a route often over looked and forgotten about.
A reasonably selected cam duration (w/high lift) and high flowing heads will carry a smog motor a long way. A reduction in cylinder head cc from a factory delivered 72cc’s (360) down to 65 or 63 as a few of the after market heads are born with help a good bunch. And you can always mill them down more of need be.
The above is not a big secret but a route often over looked and forgotten about.
MopaR&D
Nerd Member
3.07:1 was the factory 8 1/4" axle ratio for 1990s XJ Jeep Cherokees with manual transmissions, my Jeep came with that ratio I actually swapped it to 3.55s since it has a 5-speed manual with overdrive and I'm running larger-than-stock tires. 3.07 gearsets are fairly easy to come by around here (I'm in Colorado which is Jeep land) and super cheap because everyone swaps them out for a shorter ratio like 3.55s or 4.10s when going to bigger tires. I got the 3.07 ring and pinion used for well under $100 from a Jeep used parts dealer in Colorado Springs.
Actually the entire rear end I swapped into that car came out of an XJ Cherokee but it had 3.55s which were too short for highway cruising with no overdrive. Automatic Cherokees came with 3.55s because the AW4 had a much taller overdrive gear than the AX-15 manual.
lemondana
BlackDart
I have one.
Ma Mopar never built a 2 barrel 440 intake. I've never seen an aftermarket one either....
Post it up if you dare!
Edited....Never seen a 2 barrel 440 intake!
Post it up if you dare!
Edited....Never seen a 2 barrel 440 intake!
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Yunick13
2 Time FABO NASCAR champ 2023 FABO NHRA champ
512Stroker
We are all here because we are not all there.
I have 3:55 gearing in my 67 Barracuda that is equipped with a 727 transmission - no overdrive.
I cruz at highway speeds 55-70 mph frequently. I dont see the issue with it.
I had a 413 with a a 2bbl way back in the 80s. It was in a big Chrysler. Kim
MopaR&D
Nerd Member
Highway cruising speeds here in CO are 65-85 mph. Driving to the track (road course, PPIR) in my Duster I spend most of the drive at 80-85 mph, with a 904 and 2.94:1 gears it's right around 3000 RPM. I have a 3.55 gearset to swap in but I don't feel like being stuck in the "slow" lane the whole time and having even worse gas mileage on a 150-mile trip.
lemondana
BlackDart
I actually have 2 of them. They also came on industrial 440's with either natural gas or propane carburetors. I have 1 complete irrigation 440 on the stand with the drive still on it. I'll try to get some pictures in a few days.
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