Finally finishing 401 swap.

[Revelc]

Here I am again. Talking about the same swap I wanted to finish months ago.
The snow is thawing here in Colorado Springs and my Texas hands are finally getting to where they can hold a wrench outside. I'm waiting on a dipstick from Bulltear and then I'll be in business.

Please feel free to tell me what you all think of my build.
Especially coming from having a wore out 360 with a few mods.


AMC 401
.30 over
9.5:1 pistons
5-angle valve job
Crower cam specs INT/EXH - Dur @ .050” Lift: 212°/220° RR: 1.6/1.6 Gross Lift: .464”/.488” LSA: 112° RPM: 1500 to 4500 Redline: 5000
No oiling mods... Yet but I don't plan on spinning high RPM's
Edelbrock Performer
Holley 670cfm TA
MSD Pro-Billet dizzy,coil, and wires
Stock breather
Milidon high flow pump
Summit aluminum radiator

Will I have enough torque for the stock TC to take off quick?
Do I have enough CFM's?
Will I stick to my seat?
Should my Dana 44's be scared?

Will all of this net me my goal of 400HP 450ft/lbs?

3.31 gears
31" tires

[newt]

Sounds like a nice all around build.

What is the vehicle - Grand Wagoneer? How will you be using it - rock crawling, towing, sat night cruises? What tranny - T400? What xfer case?

If you plan to use it hard, your tranny, transfercase, and axles could become the weak points with that kind of power at your disposal (especially in a heavy vehicle).

I think that cam and a stock TQ converter will be fine (but this is not my area of expertice).

A lower gear ratio at the axles would help acceleration, but not MPG. I'd recommend 3.73s w/ the 31" tires and no OD gear, 4.10s is you go to a 33". The 3.31s should put you around 2300 rpm at 65 mph - 3.73s would bring that to 2600 rpm and really make it feel snappier.

Where is the darn spell check?

[Revelc]

It's going to be pushing an 85 Wagoneer.
Rebuilt TF727 with an NP208 transfer case

I'll be using it as a DD, hard acceleration on the street, and occasional trail rides. Nothing too serious offload though. It sounds like I want it all. And I do.

Hmm. I might put some gears in. But I drive 80mph in this thing. I don't know how happily shed be singing with 3.73's. Mileage doesn't matter entirely too much because I don't have a car payment and insurance is cheap. But I'd hate to put this motor in an early grave

Any HP TQ estimates?

I am completely new to the AMC scene.
These motors are highly revered and I'm hoping I set it up correctly for my application.

[Revelc]

Finally got a break in the weather.


I got the 401 painted up and settled in today. Chevy Red/Orange. I want people to scratch their heads when the good is open. I just have to hook up the tranny and accessories.

After the cam break in between 2-3.5k for 20 minutes how long should I wait before ripping the throttle or a dyno pull?

I want to know how much HP and more importantly torque it's putting down and nobody seems to have an answer/guess.

[newt]

I typed all this in once before, but I guess it didn't take.

Desktop Dyno 2000 guesstimate:
444 ftlbs @ 3500 rpm max
378 hp @ 5000 rpm max
420+ ftlbs from 2000 - 4500 rpm

Should be a good all around build for the intended use. As I said earlier, a deeper axle gear would help it accelerate, but not help your MPG.

[tufcj]

The engine in my CJ was red. I liked to tell people it was a TA Javelin block (it wasn't). The TA Jav's had red engines.

Bob
tufcj

[Revelc]

Thanks Newt.

I appreciate you taking the time to crunch numbers for me!

I hope that kind of torque can keep my wife stuck to her seat when I'm hitting the on-ramps.

Although my gears and tires may not be perfect for a road warrior I am pleased that I am right up there with Ford lightnings in terms of power.

And 100+ pounds lighter too :D

A little 75 shot of laughing gas ought to make this thing a flying toaster.