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OzECruisers General Discussions E/N/D vehicles General Discussion ONLY. NO TECH THREADS

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Old 27-01-2007, 11:22 PM   #1
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Default CPI vs MPFI

I know there is no comparision but does anyone have actual 1/4 mile times for the EA CPI 5 speed against EA MPFI 5 speed. Factory figures or magazine tests will do fine.

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Old 27-01-2007, 11:44 PM   #2
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I an only tell you the power difference is about 30 more rwkw with MPFI.
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Old 27-01-2007, 11:52 PM   #3
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Thanks. That is about correct by the way, i been a bit iffy about converting as i wanna keep the S the way it came out of factory but after seeing recent power figures after converting im starting to think twice.
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Old 28-01-2007, 12:00 AM   #4
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My CFI Auto ran 18.4 and ran 74.9rwkw on the dyno. After the MPFI Conversion it so far ran 109.0 on the dyno hoping to run it on the dyno in the next few weeks!
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Old 28-01-2007, 12:02 AM   #5
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CFI your gonna get a carppy 17-18sec time on the 1/4mile. MPI you should get into the 15's with your 5spd manual. not to bad
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Old 28-01-2007, 12:03 AM   #6
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Quote:
Thanks. That is about correct by the way, i been a bit iffy about converting as i wanna keep the S the way it came out of factory but after seeing recent power figures after converting im starting to think twice.
BTW, 88 falcon S's also came MPI from the factory i think.
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Old 28-01-2007, 12:14 AM   #7
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Quote:
Originally Posted by needaXYGT
BTW, 88 falcon S's also came MPI from the factory i think.
.
Correct.
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Old 28-01-2007, 12:16 AM   #8
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Quote:
Originally Posted by EAadam
I know there is no comparision but does anyone have actual 1/4 mile times for the EA CPI 5 speed against EA MPFI 5 speed. Factory figures or magazine tests will do fine.
Motor Mag 1988
EA S Pac 3.9 5 mpi speed 1/4 mile 15.81
EA Ghia 3.9 mpi Auto 16.72
Can't help with the cpi
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Old 28-01-2007, 12:36 AM   #9
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Not only will you get the power increase you will also notice better fuel economy aswell!
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Old 28-01-2007, 02:02 AM   #10
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Snyper u should be the poster boy for MPFI conversions!
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Old 28-01-2007, 02:14 AM   #11
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Quote:
Originally Posted by needaXYGT
BTW, 88 falcon S's also came MPI from the factory i think.
It was optional on the S. It came standard on Ghia and the LWBs but was optional on the rest of the range
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Old 28-01-2007, 03:25 AM   #12
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I think manual CPIs would as quick (or slow) as an MPI Auto.

From the factory there wouldnt be anywhere near a 30rwkw difference, but after nearly 20 years, no average condition car will be running near what it did when it rolled off the production line.

There would be Auto CPis that run better than MPi manuals depending on condition.

So its not a clear cut measurable difference unless everything is running perfectly.
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Old 28-01-2007, 11:30 AM   #13
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Workshop manuals and car booklets should be able to fill you in on the exact difference between the two as they came of the line!
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Old 28-01-2007, 01:24 PM   #14
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As the FalconFacts site says;

EA CFi - 120kw
EA MPFi - 139kw

AFAIK, heads, exhausts, exhaust manifolds, camshafts are all the same between CFi's and MPFi's.
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Old 29-01-2007, 01:54 AM   #15
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Thanks mate but im actually after 1/4 mile times against a EA CPI and EA MPFI. Both 5 speed. I already know the factory power outputs.Thanks again though.
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