MAP signal damping/more cam help

[Jeff M]

Kinsler does have a tremendous selection of unique and far reaching items
(many sources and unique suppliers including many custom).  I recommend them
highly as well, there catalog is big and as I recall, they have an info
packet too (more reading).  Also, TurboCity has a unique item that may be
what is needed here for you long legged cam users.  They have an adjustable
MAP sensor (1 BAR for sure, 2 BAR maybe, I want to call soon on this 2 BAR)
that is used to compensate for longer duration camshafts in EFI systems.
The other bigger use I see for this item is, once you decide to make big
changes to an engine including some or all such as a bigger CAM/Lifters,
head work, bigger turbo, bigger injectors, PISTONS AND RINGS, is that you
know your chip is going to be quite a bit off from optimum fueling and
timing (and such) right off the bat till you can drive and tune (a few
hours!).  Now, you do not want to start a new engine that runs too rich at
start up and during first break in hours, all that fuel dumping in is not
good for new rings.  Real rich mixture will thin out the oil supply
viscosity and such and can cause cam break-ins period to be broke or ruined
cams!  So, take this little device and toss in lots of simulated vacuum to
keep things on the lean side, then right after things start up, if the
engine stalls, raise the vacuum reading from the adjustable map till she
just runs, then give her a little less vacuum (more load/fuel) to keep it
running properly while watching the o2 hoping it lights off soon, and while
watching your tail pipe for a rich condition, rev up and break in that new
cam.  Then take out that motor and break in the rings properly, then drain
out that oil and give her another good mineral refill.  Then with this
adjustable map, have time to get a lot closer to safe fueling and timing as
we bring back the vacuum reading to what IS going on in the engine, and then
that which is only needed for that nasty cam.


Jeff M

> There is a commercial product from Kinsler Injection (248)362-1032 they
> list as a Map Damper, pg 24-s of catalog #29. No part number is given but
shows a small Vac can looking Item.  Have no experience with the damper
myself just noticed it one day on the EFI page in kinsler catalog. They do
have lots of unique EFI components and there guys seem to be
knowledgeable(not intended to be a plug for kinsler) I've just had good luck
with them.
>
> my .02
> john
> gmman at eskimo.com












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