Re: UPDATE, Swapped to carb to rule out ignition.. and pseudo-intro..

["Bruce Plecan" <nacelp@bright.net>]

If you not doing accurate testing, what are you doing?.
Buttometers, are just slightly less accurate then reading tea leaves.
Without back to back testing (when measuring for performance) your just
guessing,   why waste the fuel?.
Same with trying to figure mixtures using the O2 voltage
Grumpy




> I have only converted one car from carbs to FI.  It was a Jag straight 6
from
> two 2inch SUs to port injection.  Low end grunt improved (according to the
> butt-o-meter) and 'around town' fuel economy improved dramatically.  But
the
> top end did not feel nearly as quick (again, according to the
butt-o-meter.)
> And I used to get rubber in second, and never got it with FI.  Yet, my
> stop-watch timing to 60mph showed a good 1-second quicker (the low end
grunt,
> maybe?)
> But I really missed that top end screaming that put you back in the seat
> (well, relatively speaking, given the 4200 lb sedan with a 6cyl).
> It wasn't a restrictive throttle body ( 3 inch) or to small injectors
(24lb).
>  It just seemed the nature of the FI.  Maybe it's the long runners, I
don't
> know.
> Now I have a Chevy v8 that I am going to switch to TPI.  This car pulls
real
> hard on the highway, but is kinda wimpy in first gear (stumbles a lot, I
> don't know why).  I'm hoping I get the Fuel economy gains and the low end
> grunt, but I will be very disappointed if I lose the high end pull.  (and
by
> high end pull, I mean from 3500rpm to 5000rpm.  The auto. doesn't really
let
> it do much more than that, and I'm going 100mph by then anyway!)  Also,
> basically stock engine ('75 L48 with a 4 bbl.)  It was rebuilt at some
time,
> so maybe it is slightly hotter than stock, but has a smooth idle and
> absolutely stock on the outside.  0-60 is about 9 seconds (when it doesn't
> stumble to much in first gear) but 60 to 80 is 5 seconds flat, which is
> pretty quick.  1/8 is 10.3 at 69mph (it's only just starting to get
moving!)
> So to sum up, my experience so far has been similar to yours.  I hope the
> trend doesn't continue with my TPI.  Maybe someone on this list knows why
> this is, or can just tell us to stop using the But-o-meters?
> Ted
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