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<DIV><FONT size=2 face=Arial>Last season I ran triple Webbers on my TR6 and it
ran slightly better than my PI setup. This year I switched to 3 Z-S carbs
and I ran every bit as good as the Webbers if not better. The Webbers
sound a lot different, raspier, so for sure you'll sound like you're making more
power at the least. The PI was much smoother sounding, and the Z-S are very
good sounding also.</FONT></DIV>
<DIV>Charly Mitchel<BR>TR6 #44</DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=fot@autox.team.net
href="mailto:fot@autox.team.net">van.mulders.marcel--- via Fot</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=ofracer@gmail.com
href="mailto:ofracer@gmail.com">Mike Harmuth</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=fot@autox.team.net
href="mailto:fot@autox.team.net">fot</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, October 17, 2018 11:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Fot] Weber vs Mikuni</DIV>
<DIV><BR></DIV>
<DIV
style="FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif; COLOR: #000000; FONT-SIZE: 10pt">
<DIV>-"...hitting a wall at that point..." : is it possible this is rather
pointing to the camshaft than to the SU's? If it are the carburettors, maybe
the power would decrease more gradually above 6500 rpm.</DIV>
<DIV>-In general one choke per cylinder is better, and 2 Webers 40 DCOE isn't
overkill I think</DIV>
<DIV>- what about trying HS6 SU's on your actual manifold?</DIV>
<DIV>At what maximum rpm is your engine still reliable?</DIV>
<DIV>Marcel</DIV>
<DIV><BR></DIV>
<HR id=zwchr data-marker="__DIVIDER__">
<DIV data-marker="__HEADERS__"><B>Van: </B>"fot"
<fot@autox.team.net><BR><B>Aan: </B>"fot"
<fot@autox.team.net><BR><B>Verzonden: </B>Woensdag 17 oktober 2018
15:49:45<BR><B>Onderwerp: </B>[Fot] Weber vs Mikuni<BR></DIV><BR>
<DIV data-marker="__QUOTED_TEXT__">
<DIV dir=ltr>
<DIV>I'm looking into switching out my twin HS4s on the 1296 race engine to
either Weber or Mukinis. I know this has been done for years and I'd like to
get close the best set up out of the gate. <BR></DIV><BR>
<DIV>I don't think the SUs are up to the task of moving enough air with the
new ported head and Stahl header. I've worked on the SUs and gotten them to
finally deliver a good AFR , 12.6, at 6500 RPM under load but I seem to hit a
wall (figuratively) at that point. I suspect that the openings just aren't big
enough to deliver the mass of air required. (spreadsheet or other flow
calculator link appreciated)<BR></DIV>
<DIV>Biggest gate I suspect is the intake valve, 1 3/8" head (~35mm) HS4 is
~38mm at best.<BR></DIV><BR>
<DIV>Recommendations? I've seen all these setups at the track, each with
pluses, minuses and overkill cause it looks cool. <BR></DIV><BR>
<DIV>One weber DCOE 40 or 2? what jets, tubes etc for a starting point? Best
manifold? <BR></DIV><BR>
<DIV>2 or 4 Mikuni 40? jet size?</DIV><BR>
<DIV>thanks</DIV>
<DIV>mike<BR></DIV></DIV><BR>_______________________________________________<BR>fot@autox.team.net<BR><BR>http://www.fot-racing.com<BR><BR>Donate:
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