4 barrel throttle body where to mount IAT sensor
09-06-2016, 09:33 AM
#1
On The Tree
Thread Starter
4 barrel throttle body where to mount IAT sensor Hi
As title say i switch my Fast intake manifold to super Victor with Accufab 4500 4 barrel throttle body
But i confued where to mount IAT sensor if any one did the same swap kindly post pic for mount location
And if there is different way to solve this issue
Thanks
As title say i switch my Fast intake manifold to super Victor with Accufab 4500 4 barrel throttle body
But i confued where to mount IAT sensor if any one did the same swap kindly post pic for mount location
And if there is different way to solve this issue
Thanks
09-07-2016, 01:50 PM
#2
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
IAT can go anywhere, even outside the inlet air duct
(often preferred, you want the air coming in, not the
engine bay air around it, and if you have a good cold
air duct the outside is better at WOT and benign error
at low airflows).
But are you really asking about IAT, which has not much
to do with the throttle body, and not IAC? Seen my
buddy have to go to a Ford IAC servo on a 4150-style
swap. Not sure why.
(often preferred, you want the air coming in, not the
engine bay air around it, and if you have a good cold
air duct the outside is better at WOT and benign error
at low airflows).
But are you really asking about IAT, which has not much
to do with the throttle body, and not IAC? Seen my
buddy have to go to a Ford IAC servo on a 4150-style
swap. Not sure why.
09-08-2016, 10:27 AM
#4
Restricted User
Does it have a threaded hole for a brake booster nipple? Does your throttle body have one too?
Hook booster to throttle body, get a threaded IAT for hole in intake.
Hook booster to throttle body, get a threaded IAT for hole in intake.
09-14-2016, 01:24 PM
#6
On The Tree
Thread Starter
IAT can go anywhere, even outside the inlet air duct
(often preferred, you want the air coming in, not the
engine bay air around it, and if you have a good cold
air duct the outside is better at WOT and benign error
at low airflows).
But are you really asking about IAT, which has not much
to do with the throttle body, and not IAC? Seen my
buddy have to go to a Ford IAC servo on a 4150-style
swap. Not sure why.
(often preferred, you want the air coming in, not the
engine bay air around it, and if you have a good cold
air duct the outside is better at WOT and benign error
at low airflows).
But are you really asking about IAT, which has not much
to do with the throttle body, and not IAC? Seen my
buddy have to go to a Ford IAC servo on a 4150-style
swap. Not sure why.
But mounting this sensor outside in engine bay that wont give some incorrect parameter during tuneup!n
09-14-2016, 01:28 PM
#7
On The Tree
Thread Starter
Trending Topics
09-14-2016, 02:03 PM
#8
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
Putting IAT in the engine bay causes a false high reading.
That leads to short fuel when in SD mode (like transient
throttle and the lower-RPM blended region). Low air mass
translates to low "load" and what that implies for trans
line pressure required, etc.
And tuning with the hood up will pick up a new error as
soon as the hood is closed.
Putting IAT outside the engine bay causes a false low
reading -if- air is significantly heated in the ducting but
this is a big "if" - "time over target" matters to just how
much heat is picked up. False low temperature skew leads
to more fuel (higher air mass) and this at least doesn't
cause you ping. At high flows there is no difference from
duct to outside air temp.
I choose to have a bias toward rich fueling and let the
trims take it out (because that error only shows up at
the little end where closed loop can take it out). Better
than the opposite, a lean error at the big end with no
chance to correct (just wait for the IAT to get true to
the duct air temp, which takes time to come around
and maybe that's time you don't have).