Re: Two barrel TBI must have a flaw, I give up.

[olbap <olbap@mail.mia.bellsouth.net>]

At 11:02 PM 6/1/00 -0400, you wrote:
>Now to make any real power, least from what I've seen, you'll need the 2"
>butterflies.  Barry Gant sells em, but then ya need to find a machine shop
>that understands the word slow feed to machine the TBs for the larger
>butterflies.  Other choise if the BBC TB.


I know this, the only problem is that i had to machine my manifold slightly
for the stock tb (its wider than a carb flange) and I dont see any extra
space. Anyways, I think that despite it being a restriction I think it will
be adequate for what im aiming for (high 13s), back in I believe Nov. of 89
Hot Rod had a buildup on a then new RS camaro, similar to mine except they
used the performer RPM and the stock TB, managed to run 13.8's on slicks.
The restrictive TB was one of the main reasons I went with a single plane to
sort of make up for it since I knew Id retain pretty good low end torque.
If anything it will be a bit of a science experiment to see if it really is
up to the task.

>
>> I seem to be making progress juggling the BPW and ve tables, it feels like
>> its pulling up to about 5000 now which is a big improvement, which
>> incedentally was the result of lowering my bpw to115. Only problem now is
>> that it doesnt pull much past 5000 and according to the o2 (which ive
>found
>> is next to worthless for tuning, dont know if it got that way or its
>always
>> been) its going lean..
>
>I wish I had a penny for every time I've said forget the O2 for tuning.  It
>just ain't Reliable.  You can get by with it forra while, but it will bite
>ya, PERIOD.  Remember what is it when ya run your best and use it as an
>indicator.   SOME OF THE FAST BOYS use it as a serious tuning aid, but the
>really fast guys use it along with other indicators.  Doubt me?.  Go over to
>the GN list and read really carefully about who goes fast, and who blows
>head gaskets.   THE PROBLEM is the looky lou's, try and copy them, and read
>just what thye want to hear (?).  Like being in denial, doesn't effect the
>truth.  No flame intented to the GN folks here, just stating the less then
>apparent.


You're preaching to the converted, youll get no argument from me on that
one, this is why I ordered up the EGT, and carry a "high performance"
leather gardening glove along with a ratchet and spark plug socket, but ill
admit I dont have the best eye for a good plug cut.


>
>It's not all linear in all the corrections for AE VE etc as EXECUTED from
>what I've seen. 

I figured this much, just was wondering if you used sort of a method for a
rough estimate, and not just for PT, but currently my lower rpm ranges have
plenty of fuel but my top end goes lean despite going to like 99 ve so if I
jack up the bpw i make the bottom end pig rich and since i dont have a real
good gauge on how much % change in the chip equals how much % change in the
real world I was wondering. Its been suggested to me to look at bpw as a %
change as I would change the VE by the same % and go from there as a rough
estimate so im not just totally off, seems to work decently so far, now I
know im gonna have to go back and clean it up but im just talking about in
the mean time.


>Grumpy
>   And keep a detailed notebook.

Will do, and thank you for your help, its very appreciated.


Pablo

>> >CHT, fine for air cooled engines, and 2 strokes.  Unless they got real
>good
>> >in the last few years not to accurate on water jacketed heads.
>> >
>> >> and about the video camera, ive wished to be able to see whats going on
>> >too.
>> >> Maybe I can con a small child into sitting under the hood for a test
>drive
>> >> and look for me :)
>> >> How would I go about finding out if the injectors are recieving enough
>> >> power?
>> >
>> >Amp meter?.
>> >
>> >Should I rig up my dwell meter to them aswell?
>> >
>> >You can read dwell as Duty cycle remembering 90d dwell will represent 0%
>> >duty cycle.  Really don't need to worry about exact valuse what matters
>is
>> >that they stay close to full on.  Is kinda interesting whatching DCwise
>what
>> >happens for AE DFCO etc.
>> >Grumpy
>> >
>> >
>> >> Pablo
>> >
>> >
>>
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