Fw: Re: [Shotimes] Which MAF is best?

[Timothy Tyner]

Well then, here is the challenge I lay down to all SHO owners since it seems
I am the only one confident in the FORD 80mm and the LPM.  Show me a
timeslip from a car with a 55mm or any ProFlow unit and no LPM with a much
better 1/4 than a 14.5 and I will retract all I say about the LPM and 80mm
MAF (on a full weight NA car of course).  I find it hard to believe that my
car is the ONLY one having success with an LPM and FORD 80mm.

Toolman

-------Original Message-------

From: Darin Lind
Date: Monday, November 25, 2002 6:36:52 PM
To: Shotimes@autox.team.net
Subject: Re: [Shotimes] Which MAF is best?

I agree with ya there Ian. I ran an LPM program specifically for my nitrous
(less timing, more fuel) on my 90 SHO and what happened, but 4 melted plugs
due to pre-ignition on the first run. Went back to stock computer and things
were
better. It's a crap shoot just like you said.

And regarding MAFs and bolt-on mods, LPMs are pretty much a waste too
for WOT power, you only risk losing power. The SHO is already optimally
tuned
@WOT from the factory - fuel, timing, etc. Vadim @ SHO Shop has even said
this.
Several years ago they made a posting where they took a stock 5-spd SHO, an
expensive
MOTEC and a dyno for tuning, and the best they could muster was 1 measly HP
over stock,
by actually LEANING out the fuel curve. And there is no need for an LPM
with any bolt-on
mods, that's what the MAF is for. It detects the additional airflow and you
get more fuel from the
factory program accordingly.

I once brought my SHO to Don Mallinson's old dynojet, and we got the
following:

stock 55mm = 197hp
ford 80mm + LPM = 195hp
ford 80mm + stock program = 200hp
Don's Pro-M 77mm + stock program = 201-202hp.

The 80mm has a different voltage curve, so the air/fuel ratio should not be
optimal,
yet with the 'required' LPM 'correction' it ran slower. That is pretty
sorry. I tried another
LPM program with the same result. I've heard similar results from 80mm MAF
owners.
So I think it's a bad idea to get a MAF that relies on an LPM, get one of
the Pro-M models...
unless you want to spend some bucks to custom tune it - to probably get back
to the same
power levels as you would get with the Pro-M + stock computer.

Darin

----- Original Message -----
From: <ianf@eden.rutgers.edu>
To: "Timothy Tyner" <shospeed@bigplanet.com>
Cc: <Shotimes@autox.team.net>
Sent: Monday, November 25, 2002 3:43 PM
Subject: RE: [Shotimes] Which MAF is best?


> I am not sure which turbo SHO that you are referring to. There is one
> that is well known (Jeremy Prine's) and then there are a few other
> project cars out there as well. If I recall correctly, Jeremy has been
> trough a lot of LPM reburns, dyno time and at least one engine. Quarter
> mile times have nothing to do with safe A/F mixtures, reliabilty via
> tuning and other factors such as drivability, etc. I believe this all
> started because I stated that there might be a connection between poor
> LPM tuning and spun rod bearings due to detonation. I still maintain my
> views that LPM programming is too much of a crap shoot for the average
> SHO owner who is looking for a plug and play answer to unleash hidden
> horsepower.
>
> Ian
>
>
>
> > When turbo'd SHO's are running 13.1's with only an LPM for tuning (for
> > years), and when my NA 95 runs 14.5's with only an LPM for tuning
> (for three
> > years and 50k miles, first and only burn), I can not see the need for
> the
> > Apexi (which is much more than $300 last I checked). Not saying one
> is not
> > in my future, just that the LPM can do wonders if the guy knows what
> he is
> > doing. I am surely not going to remove an LPM to replace it with an
> Apexi,
> > but if I was starting from ground up, I would consider one.
> >
> > Toolman
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