EGR Q's (was...)

[Bruce Plecan]

Vibration, 165, MAF, not your best for reliability, IMO.
Early 165s had soldering issues, MAFs at $100 a pop are also vibration prone
Bruce


>
> Thanks for the replies!  Here's a little background on my project:
>
> My setup is a '88 L98 TPI stroked to 383, KB -18cc dish pistons, Comp
> X4258hr cam, and vortec heads.  The whole setup is in a Jeep built for
> rock-crawling so that's why I went with the hi velocity/low volume heads
and
> cam maxed for low end torque.  With the vortec's there are no internal EGR
> provision and so it would mechanically be much cleaner to block off the
egr
> solenoid mount with a plate than try to build a external egr system.  The
> 700R4, harness, and electronics are directly from the donor IROC so for
the
> most part it's a Camaro in heavy, boxy sheet metal :^)  I don't ever
expect
> to see the high side of 5K rpm so I don't think I'll run into any problems
> with excessive air restriction due to the MAF. Jeep things break very
> quickly at WOT in the rocks!
>
> The only reason I think the MAF /'165 setup *might* be better is that I
see
> a lot of altitude changes on a regular basis and (intuitively) metering on
> actual airflow seems like it would be more accurate than the manifold
> pressure method (I could be way off base here!)  Also I believe the MAF
> should meter better at the off-idle transition which pretty much sums up
my
> operating range.  The drawback is that the MAF sensor is more fragile but
in
> 2yrs of abuse, I've never had a problem with it.  I think I'm like a lot
of
> folks on the list in that if the MAF sensor breaks, MAP will look much
more
> attractive!
>
> Obviously, a cam with a lot of overlap wouldn't be too good for the low
end
> so rumpety-rumpety is out.  As far as emissions go, my Jeep is pre '82
which
> means that here in Colorado it only has to pass tailpipe sniffer
(shouldn't
> be a problem) and visual which depends on who you get to do the test and
> what kind of mood they're in.
>
> Sounds like my first EPROM foray will be to set the egr min. temp to $FF
and
> go from there.  I'm sure I'll be asking for help as time goes on so thanks
> for your collective wisdom, advice, and patience in advance!  Dan:  I
would
> be very interested in a copy of your '165 .ecu file; maybe I can 'beta'
test
> it!
>
> -Tim-
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