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28 PCI jetting
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sandman23
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Joined: August 17, 2013
Posts: 13

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PostPosted: Sun Jan 08, 2017 6:33 pm    Post subject: 28 PCI jetting Reply with quote

Looking for a little help with baseline jetting for a 1385 with a single 28PCI.
stock single ports
W100 cam
.040" deck
48cc heads
7.5 compression
The dist is a VJR4br25. This motor is in a bus.
Thanks in advance!
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bug_65
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Joined: October 01, 2011
Posts: 14

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PostPosted: Thu Jan 19, 2017 4:30 am    Post subject: Re: 28 PCI jetting Reply with quote

with the 28pci it depends what venturi diameter you have as they are different. When i was using single 28pci with custom 24mm venturii had
Idle 60
Main 135
air 180

this is with the same combination as yours except more head work and comp ration of 9.1 so some where in the ball park above should help.
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jz56oval
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Joined: September 03, 2007
Posts: 375
Location: bay area
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PostPosted: Wed Mar 08, 2017 10:05 pm    Post subject: Re: 28 PCI jetting Reply with quote

bug_65 wrote:
with the 28pci it depends what venturi diameter you have as they are different. When i was using single 28pci with custom 24mm venturii had
Idle 60
Main 135
air 180

this is with the same combination as yours except more head work and comp ration of 9.1 so some where in the ball park above should help.


Hi

Was curious on where you live to get an idea of altitude
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