[V8] 4.2 V8 fails at higher rpm

Ron Wainwright ron_01056 at yahoo.com
Sat Jan 17 08:23:51 PST 2009 

I know the guy of whom you speak, he's in Ohio. Scott did the 01E 6sp swap for him.... & other things. Bruce did some service or something to the car before.

 As far as the 3.6 ECU & the 4.2 ECU they are quiet different in how they act.
 Me & Keith have talked about this before... & I've been in contact with a West Coast lister who has an ABZ 4.2 in his 90 V8 running 3.6 ECU & wireing.
 Of course you'd need to swap a few things from a PT or ABH & move what I thought was the d-side motor mount... but some have reported the P-side's the one that needs to be moved... but in anyevent.... one of the motor mounts needs to be moved. & something would need to be done about the lack of oil cooler provisions.

 Ron
 


--- On Fri, 1/16/09, Dave Head <v8q at bellsouth.net> wrote:

> From: Dave Head <v8q at bellsouth.net>
> Subject: Re: [V8] 4.2 V8 fails at higher rpm
> To: ron_01056 at yahoo.com
> Date: Friday, January 16, 2009, 10:27 PM
> Now there's a guy out there (in either MN or OH) I
> corresponded with via 
> audiv8.de that has the TDI 6 speed in his 4.2 V8 - he is
> convinced that 
> he has to have a 4.2 5 speed ECU, because according to him
> the injector 
> pulse width is different on the 4.2  - and you'll
> overfuel it with a 3.6 
> ECU.
> I don't believe that - with the people here, and Keith
> something like 
> that would be known. I've not seen any instance of over
> or under fueling 
> in mine.
> Having driven my 90 with a bad 02 sensor and 8-10mpg, I can
> say that 
> overfueling is pretty easy to spot...
> I also don't see Audi making that radical of an ECU
> change, since Audi 
> KNEW when they put the 4.2 in the V8 that the A8 was
> replacing it in 
> just a year or two (in europe, the A8 was available in 95
> where we had 
> to wait until 97). And the A8 system was already radically
> different 
> (for its time).
> 
> Dave Head
> a low of 40F tonight, Brrrr.
> 
> Ron Wainwright wrote:
> > Pete, I went through the project thread... not much of
> one... but I remember Andrew mailing me & we discussed
> the swap, but I do not think he swapped the ECU or wireing
> harness.
> >  Might wanna ask him what he did.
> > 
> >  I won't have any dyno #'s till Spring/Summer
> time. Thats when the car should be done.... LOL
> > 
> >  Ron
> > 
> > 
> > --- On Fri, 1/16/09, Mendezwerks Mendezwerks
> <mendezwerks at gmail.com> wrote:
> > 
> >> From: Mendezwerks Mendezwerks
> <mendezwerks at gmail.com>
> >> Subject: 4.2 V8 fails at higher rpm
> >> To: ron_01056 at yahoo.com
> >> Date: Friday, January 16, 2009, 4:29 PM
> >> You know I have the same problem with my 4.2 swap.
> When I
> >> carry the
> >> rpm's close to red line the rev limiter
> intervenes and
> >> cuts of the
> >> fuel. Some times this happens even if I'm not
> close to
> >> red line, say
> >> around the upper 4K rpm range. I'm my cars
> case, I
> >> don't think that
> >> they left the 3.6 harness and ecu.
> >>
> >> Any suggestions?
> >>
> >> Also, if you have the 4.2 with the 3.6 harness and
> original
> >> programming in the ecu, wouldn't you be
> getting the
> >> same horse power
> >> and torque as the 3.6? What are the power gains?
> Can any
> >> one clarify
> >> this? Thanks.
> >>
> >> On 1/16/09, Ron Wainwright
> <ron_01056 at yahoo.com>
> >> wrote:
> >>> The mith the legend.... nice to see you post
> Bart :-)
> >> But I can answer these
> >>> questions.
> >>>  The reason your 4.2 convert AKA GE wasn't
> what it
> >> should have been wasn't
> >>> cause of the cams. The 4.2 cams would be the
> best drop
> >> in option you had....
> >>> besides radical higher lift cams! But I think
> it was
> >> the the ECU. I've sold
> >>> & been in contact with every subsaquent
> owner...
> >> John, & now Nick. From what
> >>> Nick says the car fails in the higher RPM
> range cause
> >> of the 4.2 ECU &
> >>> wireing that was used. Correct me if I'm
> wrong
> >> Bart, but Keith used the 4.2
> >>> stuff rite?
> >>>
> >>> To retouch on the cam differences.... the
> Exhaust cams
> >> are all the same up
> >>> to the ABZ.... the differences lie in the
> Intake. The
> >> Auto PT is the
> >>> starting point, then the PT Manual, then the
> ABH then
> >> the ABZ...
> >>>  I've jotted down my setup before, but I
> will
> >> again.
> >>> 92 ABH 4.2. rebuilt Block & P&P'd
> heads...
> >> some cam work as well... basiclly
> >>> the only things not replaced were the Pistons
> &
> >> Rods.
> >>> 3.6 ECU & Engine wireing harness... the
> ECU has a
> >> ABT chip
> >>> 3.6 manual accesories & crank pully
> >>> 3.6 Ported Intake Mani
> >>> 19lb inj
> >>> Zeitronix WB02
> >>> P-car adj FPR
> >>>
> >>>  I don't like to relive why I'm not
> driving
> >> the car now... but for the time
> >>> I got to drive it with the 4.2 in it,
> >>> it was something that would make one
> shivery... just
> >> words couldn't
> >>> comunicate to anyone what it felt like. As I
> was going
> >> through the gears it
> >>> was like the car wanted more! I was shifting @
> round
> >> 5/6G & could feel the
> >>> car still pulling. & the sounds it
> made...... just
> >> incredable!!!!
> >>>  I remember the 1st moments I jumped in my 5sp
> when I
> >> bought it. I though
> >>> that there was nothing finner than driving a
> V8 5sp!
> >> We drove from Imley
> >>> City, MI to Springfield, Oh.... then I drove
> from Oh
> >> back to Ma without
> >>> missing a beat.
> >>>
> >>>  All so.... as Scott has mentioned..... an 01E
> 6sp
> >> will work as well. You'd
> >>> need all the parts that you would need if one
> would do
> >> an 016 swap from say
> >>> a 200 20vt..... with the exception of needing
> the
> >> trans mounts from a
> >>> European V8 with the 6sp.... & a 6sp FW if
> you
> >> were to use an 01E trans.
> >>>  All so in the 01E familey.... you can use the
> trans
> >> from the 92-95.5
> >>> Urs4/6's. You'd still need the
> European 6sp
> >> trans mounts cause the //s4/6
> >>> trans is still an 01E.
> >>>
> >>>  Ron
> >>>
> >>>
> >>> --- On Fri, 1/16/09, Barton Chambers
> >> <gatorojo at earthlink.net> wrote:
> >>>> From: Barton Chambers
> >> <gatorojo at earthlink.net>
> >>>> Subject: Re: [V8] 5 spd transplant
> >>>> To: "Ed Kellock"
> >> <ekellock at gmail.com>, v8 at audifans.com
> >>>> Date: Friday, January 16, 2009, 1:55 PM
> >>>> Hi Ed,
> >>>>
> >>>> I dunno.  I do know that the driving
> experience is
> >>>> dramatically
> >>>> different between the UrManuals and the
> normal,
> >> autobox.
> >>>> My converted 4.2  felt more like my
> '90
> >> autobox (a
> >>>> helluva lot more)
> >>>> than my '91 UrManual.  Even with
> chips.
> >>>>
> >>>> HTH,
> >>>>
> >>>> Bart
> >>>>
> >>>> On Jan 16, 2009, at 12:14 PM, Ed Kellock
> wrote:
> >>>>
> >>>>> I think Jason is converting a 1990
> V8q.  I
> >> have heard
> >>>> that the cams
> >>>>> in the
> >>>>> 3.6 5spd cars is good for the 4.2. 
> Does the
> >> same
> >>>> apply to the 3.6
> >>>>> auto
> >>>>> cars?
> >>>>>
> >>>>> Ed
> >>>>>
> >>>>>> -----Original Message-----
> >>>>>> From: v8-bounces at audifans.com
> >>>>>> [mailto:v8-bounces at audifans.com]
> On
> >> Behalf Of
> >>>> Barton Chambers
> >>>>>> Sent: Friday, January 16, 2009
> 11:02 AM
> >>>>>> To: v8 at audifans.com
> >>>>>> Subject: Re: [V8] 5 spd transplant
> >>>>>>
> >>>>>>
> >>>>>> Jason, I don't think there is
> any
> >> problem with
> >>>> the 200 tranny but I
> >>>>>> can't say for sure, I bought a
> >> '91 V8Q as
> >>>> a donor for the
> >>>>>> Gentleman's
> >>>>>> Express.
> >>>>>>
> >>>>>> But, and it's a big one, I
> can't
> >> recommend
> >>>> strongly enough getting
> >>>>>> the cam from the 5 speed V8.  The
> >> performace
> >>>> characteristic of the
> >>>>>> '91 5 speed is quite different
> than
> >> that of
> >>>> the auto, and to my
> >>>>>> disappointment, I found that this
> was due
> >> to the
> >>>> difference
> >>>>>> in cams.
> >>>>>> I believe that it's the intake
> cam
> >> that is
> >>>> different, but the
> >>>>>> difference is real and dramatic. 
> Even
> >> chipped
> >>>> (and I tried Ned's
> >>>>>> chip as well as another), the
> '93 4.2
> >> never
> >>>> seemed as "lively" or,
> >>>>>> "eager" as my '91
> Ur5speed.
> >>>> You'll also want bigger front brakes
> >>>>>> (which means going to 17"
> wheels),
> >> and while
> >>>> you're at it, you'll
> >>>>>> probably want to upgrade the
> suspension. 
> >> But of
> >>>> all of these, I
> >>>>>> think the cam (intake?) is the
> most
> >> important.
> >>>>>> YM, naturally, MV
> >>>>>>
> >>>>>> Yer kindly ol' Unka Bart
> >>>>
> _______________________________________________
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> >>>
> >>>
> >>>
> _______________________________________________
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> >>>
> >> -- 
> >> Sent from my mobile device
> > 
> > 
> >       
> > _______________________________________________
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