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Unread 04-17-2013, 07:59 PM   #1
revelc
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1985 FSJ Wagoneer 
 
Join Date: Nov 2011
Location: Tyler, Texas
Posts: 663
Sorry for yelling but I am losing my patience.

I have been asking tons of AMC 401 questions and had very little input. I am young, have only diesel know how, and live in a rural area where people only know Chevy stuff and am considering considering just buying one and selling my Jeep because there is nobody but a handful of people who know what they are talking about building what I want in the entire world.

I want a high performance, neck snapping build.

I want it to be an ugly farm truck sleeper.

I will run 91 oct if I HAVE to.

I have tools.

I have a 401 that I'm about to tear apart to replace a cam in.

What I have
.30
9.5:1 pistons
Flat crower cam
Edel Perf intake
670 CFM Truck Avenger
Full MSD
2.5" true duals
Aluminum Radiator
High flow water pump

Here is what I need to know, can I rip 6,000 RPM over short distances with a Milidon pan?

Can I use Rhodes lifters with a Comp 274XE or Lunati 268 to smooth the idle and keep my vacuum brakes?

Do I need an Air Gap intake to run 1,800-6,000 RPM?

Can I get by with 31" tires and 3.31 or should I run 4.10's?

Do I need a double roller if I am replacing the heads in 30k miles with ones set up for rollers?

Please help. PLEASE. I am really getting sick of the lack of AMC support and helpful people.

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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-18-2013, 03:00 AM   #2
RockRollin
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Might I suggest looking into an AMC car forum (Javelin, AMX), or there are a couple of books out there for "bracket AMC building". AMCs were fairly popular in the late 70s on the drag strip. I just belive most folks are looking to build reliability on their FSJs. I'm certainly not going to flame an AMX guy because he doesn't know what kind of lift I should use. Search for some dyno proven 401 builds, they typically will list the build. You may find some on IFSJA.
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Clawed: 90GW, TFI, Streetfire, 3"lift all spring, 31"BFG ATs, working RKE, Edel2131, Holly 1850, mild cam,
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Unread 04-18-2013, 06:58 AM   #3
timgr
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The AMC forums are a good suggestion. The BullTear engine forum is another one http://www.bulltear.com/forums/forum...hp?102-Engines

IFSJA was gone from the net for so long, I think the eyeballs are way down. FSJ Network is supposed to take its place - http://www.fsjnetwork.com/forum/index.php
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Unread 04-21-2013, 07:07 PM   #4
OrangeCJ-5
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Have you checked the CJ forum? There have been some 401s put together over there although I'm not sure how in depth the threads are. Just a thought. Good luck on the build.
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Unread 04-21-2013, 07:26 PM   #5
revelc
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Quote:
Originally Posted by RockRollin
Might I suggest looking into an AMC car forum (Javelin, AMX), or there are a couple of books out there for "bracket AMC building". AMCs were fairly popular in the late 70s on the drag strip. I just belive most folks are looking to build reliability on their FSJs. I'm certainly not going to flame an AMX guy because he doesn't know what kind of lift I should use. Search for some dyno proven 401 builds, they typically will list the build. You may find some on IFSJA.
I am not too concerned about reliability. Although it will be a DD.

The AMC forum has been helpful.

Looks like Ill patch the rod knocking 360.

Then pull the 401 to put in forged 10:1 plugs, oiling mods, a Canton road race pan, and a Lunati276/268 cam with .547.567 lift and a little head work.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-21-2013, 07:37 PM   #6
RockRollin
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Quote:
Originally Posted by revelc View Post
I am not too concerned about reliability. Although it will be a DD.

The AMC forum has been helpful.

Looks like Ill patch the rod knocking 360.

Then pull the 401 to put in forged 10:1 plugs, oiling mods, a Canton road race pan, and a Lunati276/268 cam with .547.567 lift and a little head work.
That outta stomp, I have seen cams being used up to .580, but I can't seem to find it now(too much surfin).Not that the search is over.
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"I like fun" Edd
Clawed: 90GW, TFI, Streetfire, 3"lift all spring, 31"BFG ATs, working RKE, Edel2131, Holly 1850, mild cam,
05 Renegade OME 927, 947, top plate, JBA 4.5s
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Unread 04-21-2013, 08:16 PM   #7
revelc
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Quote:
Originally Posted by RockRollin

That outta stomp, I have seen cams being used up to .580, but I can't seem to find it now(too much surfin).Not that the search is over.
I know Lunati has cams that aren't listed anywhere on their site. One of their solid lifter cams has over .600 and the tech said it can be street able. I could be wrong but I remember him going into detail about solid grinds they have in the books.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-22-2013, 04:50 AM   #8
RockRollin
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That sounds doable, with the head set up for it.
Are you going solid lifter, are you looking for high RPM
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"I like fun" Edd
Clawed: 90GW, TFI, Streetfire, 3"lift all spring, 31"BFG ATs, working RKE, Edel2131, Holly 1850, mild cam,
05 Renegade OME 927, 947, top plate, JBA 4.5s
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Unread 04-22-2013, 04:57 AM   #9
revelc
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Well Ghimni PM'ed me and recommended keeping my current cast 9.5:1 pistons and keeping it under 6,000.

He also said the Comp XE274 would be great for my purposes. The Lunati 268/274 is nearly the same duration with a pinch more lift. I am thinking that and an RPM or Torker will hold me over until I can afford a Canton road race pan, Aluminum Edelbrocks, and a set of forged plugs from Bulltear for a 200-250 shot once in a while
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-22-2013, 05:03 AM   #10
revelc
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Then I can start porting the Edelbrocks and add more cam, stall, and gears when I am ready to increase giddy up. I like to do things in stages. It may cost me more in the long run but I enjoy it and hope every time that I might just find the sweet spot I want.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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