[Diy_efi] TBI in boat

Scott Appe scottappe at charter.net
Sat Aug 14 03:36:01 GMT 2004


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Tim,

You mentioned you are working on a GM MEFI 4 fuel injection system.  I =
have this system on my car and have been working on it for a while.  Do =
you know how to run a wide band O2 on the MEFI 4 system?  I see that the =
calibration can be setup for wide band, but do not know exactly which =
sensor or how to configure it.

Scott
    ----- Original Message -----=20
    From: Tim Eichhorn=20
    To: 'A list for Do-It-Yourself EFI'=20
    Sent: Sunday, August 08, 2004 11:11 AM
    Subject: RE: [Diy_efi] TBI in boat


    I had a local machine shop mill one out of 1-1/4" Aluminum.  I just =
took them a riser gasket as a pattern.  My risers (Indmar) have water =
passages on all four sides.  I just eliminated the water passage on the =
side where the O2 sensor will mount. Boats tend to run richer than cars. =
 Depending on your calibration, you may never achieve closed loop =
parameters.  The typical boat thermostat opens at 140 degrees, much =
cooler than a car.  Your boat ECM may not play very well with your boat =
cam. Boat cams have a relatively narrow lobe separation angles and about =
10 degrees more exhaust duration than intake duration, this means lower =
vacuum, which in a TBI speed density system will make you run rich.



    I think a truck based calibration would get you close.  For tuning =
you would need a wide-band O2 sensor setup to customize your =
calibration, ts.  The stock GM 350 TBI setup is only good up to about =
275 HP.  If your make more than that, you will need to run w/ the Big =
block 670 CFM throttle body.



    My experience is in Marine fuel injections based on GM MEFI =
controller.  The system I am building is a MEFI 4 based port injected =
system.  As far as tweeking the car ECMs there is an abundance of Cals, =
tuning software, and guys that know what they are doing.  This setup =
will work; is just the calibrations available will not provide optimum =
horsepower.



    Good luck.



    Tim

    -----Original Message-----
    From: diy_efi-bounces at diy-efi.org =
[mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Bill USN-1
    Sent: Saturday, August 07, 2004 9:36 PM
    To: 'A list for Do-It-Yourself EFI'
    Subject: RE: [Diy_efi] TBI in boat



    Can you put it in the exhaust cross over on the intake?



    Bill

    USN-1



    -----Original Message-----
    From: diy_efi-bounces at diy-efi.org =
[mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Wallace O. Powelle
    Sent: Saturday, August 07, 2004 10:26 PM
    To: diy_efi at diy-efi.org
    Subject: [Diy_efi] TBI in boat



    I'm going to put a TBI system of of a 305 chevy on my Volvo Penta =
305.  Any advice or words of warning would be appreciated. Should I be =
able to get by with the factory prom, Is there a built in rev limit, =
does anyone know of a source for a spacer to install O2 sensor between =
manifold & riser?  Thanx, Wallace=20



-------------------------------------------------------------------------=
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<BODY lang=3DEN-US vLink=3Dpurple link=3Dblue bgColor=3Dwhite>
<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3DArial size=3D2>Tim,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>You mentioned you are working on a GM =
MEFI 4 fuel=20
injection system.&nbsp; I have this system on my car and have been =
working on it=20
for a while.&nbsp; Do you know how to run a wide band O2 on the MEFI 4=20
system?&nbsp; I see that the calibration can be setup for wide band, but =
do not=20
know exactly which sensor or how to configure it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Scott</FONT></DIV></FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <BLOCKQUOTE=20
  style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
    <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
    <DIV=20
    style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
    <A title=3Dtim.eichhorn at cox.net =
href=3D"mailto:tim.eichhorn at cox.net">Tim=20
    Eichhorn</A> </DIV>
    <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Ddiy_efi at diy-efi.org=20
    href=3D"mailto:diy_efi at diy-efi.org">'A list for Do-It-Yourself =
EFI'</A> </DIV>
    <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, August 08, 2004 =
11:11=20
    AM</DIV>
    <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [Diy_efi] TBI in =

boat</DIV>
    <DIV><FONT face=3DArial size=3D2></FONT><FONT face=3DArial=20
size=3D2></FONT><BR></DIV>
    <DIV class=3DSection1>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I had a =
local=20
    machine shop mill one out of 1-1/4=94 Aluminum.&nbsp; I just took =
them a riser=20
    gasket as a pattern.&nbsp; My risers (Indmar) have water passages on =
all=20
    four sides.&nbsp; I just eliminated the water passage on the side =
where the=20
    O2 sensor will mount. Boats tend to run richer than cars.&nbsp; =
Depending on=20
    your calibration, you may never achieve closed loop =
parameters.&nbsp; The=20
    typical boat thermostat opens at 140 degrees, much cooler than a =
car.&nbsp;=20
    Your boat ECM may not play very well with your boat cam. Boat cams =
have a=20
    relatively narrow lobe separation angles and about 10 degrees more =
exhaust=20
    duration than intake duration, this means lower vacuum, which in a =
TBI speed=20
    density system will make you run rich.</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I think a =
truck=20
    based calibration would get you close.&nbsp; For tuning you would =
need a=20
    wide-band O2 sensor setup to customize your calibration, ts.&nbsp; =
The stock=20
    GM 350 TBI setup is only good up to about 275 HP.&nbsp; If your make =
more=20
    than that, you will need to run w/ the Big block 670 CFM throttle=20
    body.</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">My =
experience is in=20
    Marine fuel injections based on GM MEFI controller.&nbsp; The system =
I am=20
    building is a MEFI 4 based port injected system.&nbsp; As far as =
tweeking=20
    the car ECMs there is an abundance of Cals, tuning software, and =
guys that=20
    know what they are doing.&nbsp; This setup will work; is just the=20
    calibrations available will not provide optimum=20
horsepower.</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Good=20
    luck.</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Tim</SPAN></FONT></P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3DTahoma size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original=20
    Message-----<BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">From:</SPAN></B>=20
    diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
<B><SPAN=20
    style=3D"FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Bill =
USN-1<BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> </SPAN></FONT><FONT =
face=3DTahoma=20
    size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">Saturday, August=20
    07, 2004</SPAN></FONT><FONT face=3DTahoma size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> </SPAN></FONT><FONT=20
    face=3DTahoma size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Tahoma">9:36=20
    PM</SPAN></FONT><FONT face=3DTahoma size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">To:</SPAN></B> 'A list for =
Do-It-Yourself=20
    EFI'<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> RE: =
[Diy_efi]=20
    TBI in boat</SPAN></FONT></P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
color=3Dnavy=20
    size=3D2><SPAN style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Can=20
    you put it in the exhaust cross over on the =
intake?</SPAN></FONT></P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
color=3Dnavy=20
    size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <DIV>
    <P class=3DMsoAutoSig style=3D"MARGIN-LEFT: 0.5in"><B><FONT=20
    face=3D"Times New Roman" color=3Dnavy size=3D3><SPAN=20
    style=3D"FONT-WEIGHT: bold; FONT-SIZE: 12pt; COLOR: =
navy">Bill</SPAN></FONT></B></P>
    <P class=3DMsoAutoSig style=3D"MARGIN-LEFT: 0.5in"><B><FONT=20
    face=3D"Times New Roman" color=3Dnavy size=3D3><SPAN=20
    style=3D"FONT-WEIGHT: bold; FONT-SIZE: 12pt; COLOR: =
navy">USN-1</SPAN></FONT></B></P></DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
color=3Dnavy=20
    size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 1in"><FONT face=3DTahoma =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original=20
    Message-----<BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">From:</SPAN></B>=20
    diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
<B><SPAN=20
    style=3D"FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Wallace O.=20
    Powelle<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> =
Saturday,=20
    August 07, 2004 10:26 PM<BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
diy_efi at diy-efi.org<BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [Diy_efi] TBI in=20
    boat</SPAN></FONT></P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 1in"><FONT face=3D"Times =
New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 1in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I'm going to put a TBI =
system of=20
    of a 305 chevy on my Volvo Penta 305.&nbsp; Any advice or words of =
warning=20
    would be appreciated. Should I be able to get by with the factory =
prom, Is=20
    there a built in rev limit, does anyone know of a source for a =
spacer to=20
    install O2 sensor between manifold &amp; riser?&nbsp;&nbsp;Thanx,=20
    Wallace&nbsp;</SPAN></FONT></P></DIV></DIV>
    <P>
    <HR>

    <P></P>_______________________________________________<BR>diy_efi =
mailing=20
    =
list<BR>diy_efi at diy-efi.org<BR>http://lists.diy-efi.org/mailman/listinfo/=
diy_efi<BR></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>

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