GM OEM TBI up to 420hp?

Wed Sep 27 03:26:56 GMT 2000

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Well I have another question, I never did see my first one "converting carb 
to an 'airdoor'" make it to the list but I did get one reply.  While I'm 
waiting for a good programmable ECU to show up my interest in starting with 
an OE GM TBI setup is growing. I've read the 'programming 101'  and 'what 
you need' and it looks to me like one can spend $200US on hardware and then 
combine software and you can start tailoring your own EPROM's 
correct?  Looked like software editing app's have come a ways since I last 
thought about this a few years ago as well.

Is their an OEM GM 4bbl TBI unit that will flow enough to support a roller 
350 with 420'ish flywheel hp? And naturally will the injectors feed it and 
if not can they be upgraded and at what cost? I came across a kewl setup on 
a sbc 350 cross-ram intake w/ dual 2bbl's described as follows that I'd 
like any input on (not sure on writer's experience as car his car hasn't 
seen much use yet and this is a new venture for him). Haven't scared up a 
low rise cross ram intake yet but who knows....
"The Tbi.'s I am
using right now are off of a 2.8 V6 and flow 360+ cfm. each from the 
factory and
can be reworked to over 400+ cfm each. The 5.7 Tbi.'s I have as backups in the
garage flow 620+ cfm. factory and can be reworked to over 680 cfm. I am 
starting
small to see if I need more flow or not. The 2.8 should be fine for the 
combo I
have so I see no problems on the horizon. The wiring
harness is off of a 305 chev. half ton. All you need to do is split the 
wiring for
the Tb.'s for the second set. The drop in voltage does not effect anything 
as it
takes only a small amount of voltage to fire the injector. "

Been informed of an '84 vette with full EFI available but doubt it has 
anything suitable for my needs?

Thanks in advance for any info, the documentation on the websites is great 
and kudo's to everyone's efforts!

PS Did I read right that EPROM's etc are only $1 each?  I called our local 
electronics wholesaler and all his prices were tenfold higher on everything 
so digikey is looking good:-)  ie. if I buy 10 EPROMS I should be able to 
burn my trials/erase and reburn on same chips saving a few for various 
configurations right?  It read quite simple on website and just want to 
verify that. The interpretation and reprogramming I know is more involved 
with skilled interpretation. Any recc'd reading for being more aware of 
skill for interpreting/rewriting the chips?

Ross Corrigan

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Well I have another question, I never did see my first one
&quot;converting carb to an 'airdoor'&quot; make it to the list but I did
get one reply.&nbsp; While I'm waiting for a good programmable ECU to
show up my interest in starting with an OE GM TBI setup is growing. I've
read the 'programming 101'&nbsp; and 'what you need' and it looks to me
like one can spend $200US on hardware and then combine software and you
can start tailoring your own EPROM's correct?&nbsp; Looked like software
editing app's have come a ways since I last thought about this a few
years ago as well. 
 
Is their an OEM GM 4bbl TBI unit that will flow enough to support a
roller 350 with 420'ish flywheel hp? And naturally will the injectors
feed it and if not can they be upgraded and at what cost? I came across a
kewl setup on a sbc 350 cross-ram intake w/ dual 2bbl's described as
follows that I'd like any input on (not sure on writer's experience as
car his car hasn't seen much use yet and this is a new venture for him).
Haven't scared up a low rise cross ram intake yet but who knows.... 
&quot;The Tbi.'s I am 
using right now are off of a 2.8 V6 and flow 360+ cfm. each from the
factory and 
can be reworked to over 400+ cfm each. The 5.7 Tbi.'s I have as backups
in the 
garage flow 620+ cfm. factory and can be reworked to over 680 cfm. I am
starting 
small to see if I need more flow or not. The 2.8 should be fine for the
combo I 
have so I see no problems on the horizon. The wiring 
harness is off of a 305 chev. half ton. All you need to do is split the
wiring for 
the Tb.'s for the second set. The drop in voltage does not effect
anything as it 
takes only a small amount of voltage to fire the injector. &quot; 
 
Been informed of an '84 vette with full EFI available but doubt it has
anything suitable for my needs? 
 
Thanks in advance for any info, the documentation on the websites is
great and kudo's to everyone's efforts! 
 
PS Did I read right that EPROM's etc are only $1 each?&nbsp; I
called our local electronics wholesaler and all his prices were tenfold
higher on everything so digikey is looking good:-)&nbsp; ie. if I buy 10
EPROMS I should be able to burn my trials/erase and reburn on same chips
saving a few for various configurations right?&nbsp; It read quite simple
on website and just want to verify that. The interpretation and
reprogramming I know is more involved with skilled interpretation. Any
recc'd reading for being more aware of skill for interpreting/rewriting
the chips? 
 
Ross Corrigan 
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