[Diy_efi] Swap 305tbi to 350tbi in GM truck

Thu Mar 27 22:50:56 GMT 2003

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Understanding the basics of tbi operation what would be the best route =
for tbi for this newbie. I am swapping my tired 305 for a new 350 in my =
'91 Silverado 4x4.=20

1)  Can I stay with my stock 305tbi (40lb/hr) or do I have to upgrade to =
5.7L 55 lb/hr or caprice 65lb/hr for a stock 350? =20

2) If I do have to switch TBI units must I find a prom for this combo =
(5.7L, 700R4, 3.73 gears)  or will    =20
my stock prom(5.0L, 700r4, 3.73 gears) adapt then pump enough fuel to =
compensate for the change?  I don't want to run too lean & grenade my =
project!

Thanks for any suggestions,
Kevin

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<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff size=3D2>Understanding =
the basics of=20
tbi operation what would be the best route for tbi for this newbie. I=20
am&nbsp;swapping my tired 305 for a new 350 in my '91&nbsp;Silverado=20
4x4.&nbsp;</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff size=3D2>1)&nbsp; Can =
I stay with my=20
stock 305tbi (40lb/hr)&nbsp;or do I have to upgrade to 5.7L 55 lb/hr or =
caprice=20
65lb/hr for a stock 350?&nbsp; </FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff size=3D2>2)&nbsp;If I =
do have to=20
switch TBI units must I find a prom for this combo (5.7L, 700R4, 3.73=20
gears)&nbsp; or will &nbsp;&nbsp;&nbsp; </FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff size=3D2>my stock =
prom(5.0L, 700r4,=20
3.73 gears)&nbsp;adapt then pump enough fuel to compensate for the =
change?&nbsp;=20
I don't want to run too lean &amp; grenade my project!</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff size=3D2>Thanks for =
any=20
suggestions,</FONT></DIV>
<DIV><FONT face=3D"Comic Sans MS" color=3D#0000ff=20
size=3D2>Kevin</FONT></DIV></BODY></HTML>

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