Holley Projection 2D

[Bruce Plecan]

| > 454 BBC, 747 prom calibration.  Will take some work to get it, right.
4 at 85
| > would feed, what 720 HP, which is ridiculious (for a TBI, again IMHO).
So
| > part of the problem with the 4 at 85 idea is like when you run big
injecotors
| > on any thing, screwy injector durations (IMHO).  Then how much airflow
do
| > you really need?.
| I guess I should have clarified, my uncle has a 383 w/the 2bbl unit with
the
| 85lb/h.
| My stepfather has the 4bbl unit with unknown injectors sizes.

The 4 barrels come 65. 75, or 85 as I recall.
The late BBC come with 80-5 and the early with 90-5 injectors.  Need to
ask/look in archives for what years thou.

| Yes, you're probably right.  Actually, I am going to as my uncle if he
would
| rather do a TPI setup or modify his TB setup, both options using GMECM's
(he
| likes the idea of being able to get a replacement ECU at a parts store if
one
| grenades on a road trip).  I have just been a little gun-shy about working
on
| someone else's stuff when I have had so much trouble with my own TPI
| conversion.  I just had lots of little stuff come up, I guess that's to be
| expected when you get an '85 model.  The (I believe to be) bad 85 ECM was
most
| of my problem, along with partially clogged injectors, bad intake manifold
| gasket, MAF troubles, bad connections on the old harness, and a million
other
| things I am forgetting.

We all do the first couple times, gets better thou.

| I have converted my setup to a 1227165 and an '89 calibration now and
things are
| much better.
| BTW does anyone have a .ald file for Carbytes for this cal????
 > | Do you know off hand how much air a BBC TB will flow???  I guess I
could
| > as my
| > | uncle how big his throttle plates are in the Holley.
| > The two barrel 2" according to Holley is 670 CFM.
| > The 4 barrel holleys as I recall are 1 5/8, or 1 11/16"...
| > Grumpy
| Good  info so far, Thanks....
| Gabe


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