[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> </DIV>
<DIV><FONT face=3DArial size=3D2>You mentioned you are working on a GM =
MEFI 4 fuel=20
injection system. I have this system on my car and have been =
working on it=20
for a while. Do you know how to run a wide band O2 on the MEFI 4=20
system? 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> </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. I just took =
them a riser=20
gasket as a pattern. My risers (Indmar) have water passages on =
all=20
four sides. I just eliminated the water passage on the side =
where the=20
O2 sensor will mount. Boats tend to run richer than cars. =
Depending on=20
your calibration, you may never achieve closed loop =
parameters. The=20
typical boat thermostat opens at 140 degrees, much cooler than a =
car. =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> </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. For tuning you would =
need a=20
wide-band O2 sensor setup to customize your calibration, ts. =
The stock=20
GM 350 TBI setup is only good up to about 275 HP. 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> </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. The system =
I am=20
building is a MEFI 4 based port injected system. 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. 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> </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> </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> </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> </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> </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> </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. 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 & riser? Thanx,=20
Wallace </SPAN></FONT></P></DIV></DIV>
<P>
<HR>
<P></P>_______________________________________________<BR>diy_efi =
mailing=20
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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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