the 401

[Bobbo]

Well, I have no idea what these things were rated for at the factory, but my 401 cherokee (stock) kills my bored and 4 barrel 360 wagoneer, so if you ask me use a 401 if you have one! My dad had a built 360 in a cherokee that was bad ass when I was a kid. It was fun when I first got my licence. Of course I wrecked it! Dang kids!

[Crazy_Jeepman]

Originally posted by Elliott:
I've had a worn out 401 that would stomp a reman 360 = that shouldn't be such big news really, considering how much better a 401 will wear over extended mileage.
Maybe you want to attribute that more to the TH400? It probably has something do with it.

How in the heck did I miss these facts? Instead of buying or rebuilding 360's we all should replace em with wore out 401's. The TH400 I really did miss that! Dam Thanks for getting this sorted out for me!!

[Elliott]

I honestly don't know why you would rebuild a 360 at standard, I've only had the one.... docile comes to mind.

[Elliott]

Originally posted by Bobbo:
Well, I have no idea what these things were rated for at the factory, but my 401 cherokee (stock) kills my bored and 4 barrel 360 wagoneer, so if you ask me use a 401 if you have one!

Can I get a witness

[jeepsr4ever]

Are you guys SERIOUSLY doubting the power of a 401 without owning one?

[mark j]

The 360 in my '72 has 10k on the rebuild- it has MSD 6A, Summit cam, 10.5 comp pistons ( I asked for 9.5 ?@#$!%%)- otw all stock. The 401 in my '76 is all stock with 140K. I'd give the edge to the 401 between the two- not a huge difference, but definately noticeable.

[jeepsr4ever]

Mark thats unreal!!

[Retro93]

Originally posted by jeepsr4ever:
Mark thats unreal!!

[jeepsr4ever]

LOL I meant yeah thats about right!

but 10.5's to one and cammed, whoa thats a decent 360

[GRUNT]

Well I guess I hit some nerves. I guess I'm keeping my 401! My crate 360 in my J-20 is fine. I guess I'll put the 401 in my wife's 88 mint wag! I'll make the woody a sleeper! The 360 in hers is gonna let go one of these days!

[Elliott]

Originally posted by mark jones:
The 360 in my '72 has 10k on the rebuild- it has MSD 6A, Summit cam, 10.5 comp pistons ( I asked for 9.5 ?@#$!%%)- otw all stock. The 401 in my '76 is all stock with 140K. I'd give the edge to the 401 between the two- not a huge difference, but definately noticeable.

Thank you mark.

[Elliott]

Originally posted by BIGBEARJ20:
Well I guess I hit some nerves. I guess I'm keeping my 401! My crate 360 in my J-20 is fine. I guess I'll put the 401 in my wife's 88 mint wag! I'll make the woody a sleeper! The 360 in hers is gonna let go one of these days!

It happens every time 401 comes up, not your fault. People try to trust the specs and trip all the time, probably more often with Jeeps. I didn't know that 401s came with 2bbl in CA, almost no one knew that the pickup could be had with dual front shocks, many didn't know the dually one ton existed and most didn't think a Kaiser Thriftside came with both the short and long wheelbase. I don't think the specs are correct on the 360/401... for what ever reason and if you look at the specs on the car versions of the 360/401 in the same time period you see a different set of numbers that can't all be explained by cam/manifold and dual exhaust variances.
Over here you can read a little more on the history and check specs at the bottom... you see a police 401 making 315hp (net) with the same compression ratio and the IH 401 crankin 225hp with a 2bbl so why should the Jeep 401 with a 4bbl come in at 215? I doubt it's all cam.:

http://home.att.net/~farna/amtech/engines.html#V-8

1971, 330 hp @ 5000 rpm, 430 ft/lb @ 3400 rpm, 4V, 9.5:1 (gross figure)

1972-75, 255 hp @ 4600 rpm, 335 ft/lb @ 3200 rpm, 4V, 8.5:1 police only in 1975
(THESE TWO ARE PROBABLY REVERSED)
1972-75, 315 hp @ 3100 rpm, 280 ft/lb @ 1500 rpm, 2V, 8.5:1 w/dual exhaust, police only in 1975

1973-74, 225 hp @ 4600 rpm, 330 ft/lb @ 2600 rpm, 2V, 8.5:1 International Pickup and Travelall only, rpm and torque estimated

[ December 01, 2003, 08:18 PM: Message edited by: Elliott ]

[jeepsr4ever]

exaclty, we had a t-code 401 that grossed 500hp

[fulsizjeep]

jeepsr4ever: Are you guys SERIOUSLY doubting the power of a 401 without owning one?

I love that statement! We have 2 401 powered rigs and they have much more grunt than any 360 I have had.

One is built to .030 over and RV cam with about 40K on it in a 76 Cherokee. It will go fast enough to shake the body (mucho rust) and that is scarey. Gets about 10mpg. This motor is going in Wally.

Krista's 77 Wag has original 73K on it with a lifter tick and 3.07 gears and gets 15-16 mpg on the highway. It will flat walk away from my 88GW with 225K 360 and 3.73 gears getting 10 mpg. I should be stabbing that other 401 in Wally this winter... YEAH

[ December 02, 2003, 10:38 AM: Message edited by: Flint ]

[243]

OK, I haven't driven a Waggie with a 360 but my 79 with 2.73's and a 401 limping along on 7 cylinders felt strong, stronger than the stock 350 4bbl in my 81 C10 with 3.08's.

IMO, 10hp by the seat of the pants is hard to discern, 20hp is noticeable. Torque on the other hand, is noticeable

If power alone was what I wanted, I would have kept the 401 instead of the "planned" SBC 350 swap.