Re: [Amc-list] Concord Engine Question - 4.0 EFi Six -

[Wrambler <wrambler242@xxxxxxxxxxx>]

So, Basically you don't have any real reasons for not liking the 91-95.

That's what I thought...

Those are all reasons that really make zero difference for someone who wants to put a 4.0L in and drive the car.

Renix does indeed work well, when it works. 
It's now ancient science.
The reasons why chrysler did or did not do something with renix is also pointless.

Block design? More worthless info for a daily driver.  None of these engines has actual problems related from block design changes.
Maybe some are noisier? Tell the guy with 300,000 miles on his 91-95 4.0L that it is a bad engine???

He can put together a car from any 87-95 and make it run and drive.
If he wants to be able to learn to maintain it EASILY without a steep learning curve, custom ecu etc, The 91-95 is that system.
You know as well as anyone the Renix system requires you to learn how to work on it. You won't find many shops left that can scan a system, let alone work on one. Parts in stock? Fuhgeddaboutit, maybe they can order them???

You are after perfection for your dream turbocharged all everything vehicle.
He is just trying to make his wagon driveable and you point him away from the easiest system to buy install and use.
Give the guy a break and don't try to tell him to stay away from a system just because you don't think it is pefect for YOUR needs.


Mark Price
Morgantown, WV 26508
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
"I realize that death is inevitable.
I just don't want to be around when it happens!"

----- Original Message -----
From: "Brien Tourville" <hh7x@xxxxxxxxxxxxx>
To: amc-list@xxxxxxxxxxxx
Sent: Sunday, March 8, 2009 4:30:22 PM GMT -05:00 US/Canada Eastern
Subject: [Amc-list] Concord Engine Question - 4.0 EFi  Six -

From: Wrambler <wrambler242@xxxxxxxxxxx>
Subject: Re: [Amc-list] Concord engine question
To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx>


Say what?

Looking at your reply Brien it looks like you are saying nah to using the 91-95 4.0L for the swap?

Since those are my preference years for 4.0L swaps I would like to know why you say nah?

Those years of the OBD efi are most swappable, easiest to do and wire, less sensors and hoops to get workign than a 96 up OBD II system.  The 91-95 is what Chrysler based the swap harness and efi on. I have a 91 Wrangler system in my Americand it has been performing flawlessly since install.



--





Correct_ah_Mundo - :]


 Because ..  IMO and Others  .. the Renix engines were designed & built really well - the blocks - can't speak
to the Ni-Si  contents in these years but have read the Kudos from builders on their impressions while machining them - and unlike the '91 - '95 blocks - they like 'em.

Chrysler removed material from the engine blocks - to lighten them and to save money in the '91 thru 95 engines .  

I believe materials used at the Foundries were of a lower cost as well from the machining comments I've read - kinda the difference between a richly dense quality & one that is drier & less dense.

In keeping with your premise that 'less is more' applied to
 EFi engine management - I disagree  .

Chrysler did a 're_rethink' like AMC did with their 258 block - so much so they had to add a Main Stud Girdle to stiffen the blocks.. and kept adding back block material casting run after casting run - which led to the NHV Blocks - Noise Harmonic Vibration - with lettering NVH cast right into the blocks of latter years  .

Cash strapped Chrysler would not have done any of this - if there weren't obvious problems that would cost them in service complaints & ratings.

There were problems with the '91 - 95 engines - wear problems - noise problems - flex problems.

Might just as well get the quality version as pricing is the same.



A swapper can choose to using a GM ECM instead of a Renix or OBD system .

The Renault - Bendix = Renix system is preferred by off_roaders as they accept camshaft upgrades without ping problems -  Your '91-'95 systems do not.

Other choice used widely are the GM ECM units.
  
'91 - '95 EC M's take less engine readings - making cruder corrections thus dumbing down the engine and lowering the EFi effectiveness.

I'd guess that as a DD running unloaded in a light car - it would be ok - but again, Chrysler kept adding back ECM control to each ECM system used after the Renix.

It is my understanding that Chrysler left the Renix system due to legalities - they didn't want to pay to use the patents.

The Renix system was costly to design - and they covered all bases to get it right.

Although you can't flash these chips - it seems no one has found the need to, even
when running them with a street Turbo @ 5 to 7 lbs.


The Edelbrock EFi kit for AMC V8's are GM EC M's .

GM EC M's are easy to install - easier to harness in since some have stand alone harnesses - and you can flash the chips to your particular engine.


My DD is an '89 Cherokee Sport 2dr. 5spd. - the engine is incredibly solid - quiet  & strong @ 200K miles .  

The Renix ECM does a great job of Fuel Quality management - have never had a Ping regardless of load / RPM range while running the el Cheap o Mobil pump gas.

I'd recommend a 2wd 1990 or '89 personally - or - an NVH block '98 with the 
7120 head , '99 Intake Manifold and ECM EFi control of your choice, mine being
the Renault - Bendix system - same Grp. that does the work for the Renault F-1
Racing efforts.

That would be a Sweeeeeeeeeeeeet  combo with all the best at bargain RM prices.


I would not delete the EFi system - just get over dancing pussy foot & 
commit to getting it in.

They're s a few Guru's on this List & Strokers 
that can help with the harness & questions.

I'll seek one out when I finally get moving on the Kammback again.

I have in stock an '88 Renix system that needs the harness weeded - cost is around $100 for the deed - well worth it for peace of mind.


The Camshaft in the 4.0 is an EFi Camshaft - not a Carb Camshaft.

Had a long talk with Chase Knight @ Crane Cams on this very topic &
my view is his view:  

Install the EFi or change the Cam for a Carb version.


Moving back to a carb away from a Factory Designed EFi system
is a no brainier for me.. it'll never happen.



There are differences with the Accessory Drives according to models
which I believe has to do with space.

 I'm half watching NASCAR at the
moment so - ...........I'm outtake here.



milnersXcoupe
1981 series50

_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list
_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list