[V8] 4.2 V8 fails at higher rpm

Fri Jan 16 18:53:22 PST 2009

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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