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Message
Personal anecdote: I have flow tested Mazda 460 x4 and 680 x2
injectors. The 460s all actually flowed 520 and the 680s flowed ~750. This is at
3 bar and 100% duty cycle. Perhaps Mazda rates these at 80% DC and MSD
rates theirs at 100%?
Thanks
Mike,
I had always figured
Mazda used their fuel pressure, rather than the standard 3 bar method, which
made their ratings a little on the low side. I wonder now if they only did
this for some injectors, like the 460. It's interesting that your
test shows that the 460 flows 520. I had 550's tested at RC Engineering,
and they were right on the money. That would actually explain why I saw no
real difference. Here's a quote from a message I sent a while
back:
RC Engineering seems to be
a very fast and efficient operation. They just got my injectors today, and
have already called with test results. I sent 4 very slightly used Mazda
550's, and 2 new MSD-2013's, which are supposed to be 50 lb/hr (525
cc/min). They said all 6 injectors were clean, and needed no service at
all. The MSD's flowed less than advertised, but not by nearly as much as I
figured. Here are the results:
MSD- 498,
503
Mazda- 547, 549, 551,
551
Thanks,
Rusty
(must find a way to install MSD's in the
block...)
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