AMC 401 Break In Procedures

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Jevman
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AMC 401 Break In Procedures

Post by Jevman »

What are your thoughts on a break in for an AMC 401 that has a Pro Flow 4 that needs to be set up also. Do you get the Pro flow running right second and just get it started and run it at 2000 to 2500 RPM for 20 mins then drive it 60 miles at 55 to 65 mph (ring ride), tune the Pro Flow then drive it like you stole it??
78 Cherokee Chief W/T, 4" lift, 35x12.5R17 BFG TA's KO2's, 401, 700r4, Atlas II 3.0:1, 4.56, Pro Flow 4, CVF Serpentine System, E-Locker front, True Trac rear, Dakota Digital, Hydroboost Power Steering and Brake System, rear wheel disc conversion, E-Stopp Elec Brake Systm.
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Stuka
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Re: ACM 401 Break In Procedures

Post by Stuka »

Your base tune for the ProFlo basically needs to be good enough to have it run to break the cam in. Important to not have it run super rich. Once the cam break in is done, then you can work on getting the tune better. I would get at least a decent tune into it before taking it for a drive.

Though I guess if you are using the self learning mode, a drive would be required to get it to learn.
2017 JKU Rubicon
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

will e
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Re: ACM 401 Break In Procedures

Post by will e »

Can you toss a carb on it for the break in?
81 Waggy 'WILL E' Retired
82 Cherokee WT - SOA/SF/high steer/Alcan springs/agr box/Borgeson steering shaft/AMC 401/performer/holley TA/HEI/BeCool/727/ALTAS (2.0/2.72/5.44)/D60 Snofighter(Yukon Zip,hubs,stubs,4.56)/14 Bolt (FF,BF shave, Discs, ARB,Artec Truss)/MTR 37X12.5/Corbeau XRS Baja & 5 point retractable harness/Hella Aux lights/tuffy console/killer32 sliders/Evil Twin bumpers, rack and roll cage/WARN 8000/TT Fabworks steering brace/dual batts/custom TC skid plate/ARB fridge
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Stuka
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Re: ACM 401 Break In Procedures

Post by Stuka »

will e wrote: Wed May 17, 2023 3:13 pm Can you toss a carb on it for the break in?
The pro-flo replaces the whole intake.
2017 JKU Rubicon
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will e
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Re: ACM 401 Break In Procedures

Post by will e »

Well, that's a bummer. I went and looked at a picture of one. Can the throttle body be removed and replaced with a carb temporarily? Just for the actual break in? Or am I doing my usual 'over complicating' it.
81 Waggy 'WILL E' Retired
82 Cherokee WT - SOA/SF/high steer/Alcan springs/agr box/Borgeson steering shaft/AMC 401/performer/holley TA/HEI/BeCool/727/ALTAS (2.0/2.72/5.44)/D60 Snofighter(Yukon Zip,hubs,stubs,4.56)/14 Bolt (FF,BF shave, Discs, ARB,Artec Truss)/MTR 37X12.5/Corbeau XRS Baja & 5 point retractable harness/Hella Aux lights/tuffy console/killer32 sliders/Evil Twin bumpers, rack and roll cage/WARN 8000/TT Fabworks steering brace/dual batts/custom TC skid plate/ARB fridge

OldFarmTruck22
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Re: ACM 401 Break In Procedures

Post by OldFarmTruck22 »

will e wrote: Thu May 18, 2023 5:56 am Well, that's a bummer. I went and looked at a picture of one. Can the throttle body be removed and replaced with a carb temporarily? Just for the actual break in? Or am I doing my usual 'over complicating' it.
Depends on the manifold. If the intake opening shape is propriatary to the pro-flo throttle body, then No.

If it's a standard square-bore or quadrajet opening, then yes. You still have to make sure you can get it to run up at 2000 to 2500 rpm right quick.
78 FSJ AMC 360 Quadratrac

Srdayflyer
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Re: ACM 401 Break In Procedures

Post by Srdayflyer »

what is the fuel pressure? carbs run at a min 5psi to 10psi , f.i. systems run min 50psi. carb with a high pressure will probably over ride the float possibly blow the fuel line connections, possible engine fire hazzard, just things to consider

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Jevman
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Re: ACM 401 Break In Procedures

Post by Jevman »

Fuel pressure is 43psi or 58psi for the Pro Flow 4 depending on your HP, this 401 will be around 400 to 425Hp possibly and I have a 43psi in tank pump, like Stuka said above, I think the base tune, just get it going and not supper rich should work, I think i will try get ahold of Edelbrock on this one and fill you in on what they say about the cam break in when you have a new PF4 also
78 Cherokee Chief W/T, 4" lift, 35x12.5R17 BFG TA's KO2's, 401, 700r4, Atlas II 3.0:1, 4.56, Pro Flow 4, CVF Serpentine System, E-Locker front, True Trac rear, Dakota Digital, Hydroboost Power Steering and Brake System, rear wheel disc conversion, E-Stopp Elec Brake Systm.

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Jevman
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Re: ACM 401 Break In Procedures

Post by Jevman »

Update from Edelbrock, (Engine is started , turn idle adjustment screw on linkage clockwise to desired RPM 2000-2500. ) That simple with a new Pro Flow 4 for cam break in
78 Cherokee Chief W/T, 4" lift, 35x12.5R17 BFG TA's KO2's, 401, 700r4, Atlas II 3.0:1, 4.56, Pro Flow 4, CVF Serpentine System, E-Locker front, True Trac rear, Dakota Digital, Hydroboost Power Steering and Brake System, rear wheel disc conversion, E-Stopp Elec Brake Systm.
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Stuka
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Re: ACM 401 Break In Procedures

Post by Stuka »

Jevman wrote: Mon May 22, 2023 12:17 pm Update from Edelbrock, (Engine is started , turn idle adjustment screw on linkage clockwise to desired RPM 2000-2500. ) That simple with a new Pro Flow 4 for cam break in
Awesome.

I know with the Holley system it is very similar. They are supposed to just run (in open loop) from the get go. Tuning comes in for making them drive well, assuming the self learning mode doesn't work out.
2017 JKU Rubicon
Pevious Jeeps: 1981 J10, 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ
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