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

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

I dont know exactly, but I think it has to do with fuel flow and puddling at
the bottom of the manifold

I just did a s--tload of testing and was as methodical as pablo gets..
issuming I was going lean I started off with 20 psi, and just increased the
pressure in like 3 psi increments.. there was a point where it had gotten
slightly better at the top, my test was in first gear starting at 3500 rpm
the drop in power occured always at the same rpm but at differening severity
somewhere slightly above 30 psi yeilded the least severe drop (very very
mild improvement if at all) but severe nonetheless (did not pull past 5000
much).. as i increased pressure from there i was greeted with diminishing
returns.. there was NO possible way I was going lean, my BPW was set at 134,
and I was at around 90% ve wot at high rpm, 65 lb injectors (yellow/brown)
as i increased the pressure still further. the problem became worse. It was
very very bad the higher it went. I believe the same problem a carburetor
has at high rpm, the TBI has, only worse since the fuel is injected at a
higher pressure, that is the fuel hits the bottom of the manifold and turns
into little streams.
This is all just hypothesis though, I have no other way to explain my total
lack of high rpm horsepower
        Perhaps a much lower pressure would remedy the situation.. i dont
know.. the only problem is that a lower pressure would also yield less fuel,
at 19 psi these injectors would only support 300 hp

Unless anyone here has had any good luck with two barrel tbi setups at the
high rpm end of the spectrum and can tell me anything ground breaking I
think this battle is lost.


Pablo

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