[Diy_efi] Nitrous/alcohol injection...

Wed Nov 24 13:14:25 GMT 2004

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What are you guys thoughts on nitrous/alcohol injection? The engine is a =
2.0 liter DOHC with variable valve timing fully built internally =
balanced/sleeved etc.. 12.4:1 compression ratio. Basically the plan is =
to have a separate fuel system for the fuel side of the direct port =
system which will utilize alcohol to reduce cylinder temperatures. =
Basically I'm trying to figure out what pressure to keep the alcohol =
line at and I'm trying to figure out what affects that will have on =
air/fuel ratio for tuning. What is already known is that the fuel jets =
will have to be exactly doubled as compared to traditional gasoline and =
given the combustion characteristics the timing will have to be reduced =
1-1.8 degree per 100hp instead of 0.8-1.0 degrees retard. The idealistic =
figure is 150hp single stage. Since I'm using individual throttle bodies =
without a stock location the nitrous nozzles (pro shot fogger) will be =
placed directly in the intake runner facing the back of the intake =
valve. What are your thoughts? Thanks in advance...

Brian Mcmahan=20

=20

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<BODY>
<DIV><SPAN class=3D340415912-24112004><FONT face=3D"Book Antiqua">What =
are&nbsp;you=20
guys thoughts on nitrous/alcohol injection? The engine is a 2.0 liter =
DOHC with=20
variable valve timing fully built internally balanced/sleeved etc.. =
12.4:1=20
compression ratio. Basically the plan is to have a separate fuel system =
for the=20
fuel side of the direct port system which will utilize alcohol to reduce =

cylinder temperatures. Basically I'm trying to figure out what pressure =
to keep=20
the alcohol line at and I'm trying to figure out what affects that will =
have on=20
air/fuel ratio for tuning. What is already known is that the fuel jets =
will have=20
to be exactly doubled as compared to traditional gasoline and given the=20
combustion characteristics the timing will have to be reduced 1-1.8 =
degree per=20
100hp instead of 0.8-1.0 degrees retard. The idealistic figure is 150hp =
single=20
stage. Since I'm using individual throttle bodies without a stock =
location the=20
nitrous nozzles (pro shot fogger) will be placed directly in the intake =
runner=20
facing the back of the intake valve. What are your thoughts? Thanks in=20
advance...</FONT></SPAN></DIV>
<P><B><FONT face=3D"Copperplate Gothic Light">Brian Mcmahan</FONT></B> =
<BR></P>
<DIV>&nbsp;</DIV></BODY></HTML>

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