Well this past weekend i finally took my 05 HCH out for the whole weekend instead of just driving it once to the store or something. I also got around to uninstalling my Ultragauge from my MT insight. I noticed some strange behavior. While i was driving 63mph (fast i know ) with cruise control on i had intake temps going as high as 105° and wasn't in lean burn. I backed off 1-2mph and was able to maintain lean burn at that speed. Well the intake temps went all the way down to 55° (ambient was low 30's).
Can anyone explain this? Sure the engine could be running cooler, but this doesn't explain 105° intake temps. Maybe honda designed an actual hot air "mod" for the HCH's? I was going to put a rad block in my car before the trip, but the typical spot on the insight is blocked on the HCH with plastic, and i didn't feel like digging into it. ok any thoughts or diagrams or exploded views?
Tim
__________________ 2000 Silver MT #168, 119k miles, Grid charger, CARD switch, rad block, MIMA #174, Hurting (aka dead) IMA battery which I'm trying to revive.
80.1 Lmpg over 14,654 miles (4/23/12)
Bests trips: One way 58.2 miles-107.3 mpground trip 116.8 miles-98.5mpgTank: 90.75mpg
2001 Blue CVT "Retired" to the girlfriend - 191k miles my Lmpg 69.3 over 21k miles
Best trip: 56.6 miles-92.3 mpg, round trip 133.6miles-84.3mpg Tank: 623.6 miles 8.30 gallons=75.13mpg 2005MT HCH winter car-52.9Lmpg
My thought was.. if the air intake snorkel is on the back side of the radiator like on the Insight..when not in lean burn, maybe the engine was just losing that much heat? Lean burning may have kept the thermostat mostly closed..
__________________
Insight #1 - Silver '01 5MT @ 158,388 as of 7/11 - Best Tank: 84.5MPG over 807mi
Insight #2 - Silver '01 5MT @ 450,000 as of 1/12 - Best Tank: 86.0MPG over 800mi
Insight #3 - Silver '00 5MT, MIMA #163P, BCM Gauge, OBDIIC&C Gauge, BetterBattery @ 228,869 as of 1/12 - Best Tank: 78.4mpg over 687mi
I need to get my hands on some diagrams, or just dig around the engine bay alittle and see where things are located. Correct me if i'm wrong, but I thought i read somewhere that lean burn makes the engine burn hotter even though it's burning less fuel. Drive to work today i was really annoyed with the car taking forever to reach 165° and lean burn only kicking in at 170ish. Winter might finally be here.
I never received a instruction book with my ultragauge so i just fly by the seat of my pants. I Tried finding one on their website and couldn't find anything. Why would changing MAP to MAF change my intake temperature reading?
Tim
__________________ 2000 Silver MT #168, 119k miles, Grid charger, CARD switch, rad block, MIMA #174, Hurting (aka dead) IMA battery which I'm trying to revive.
80.1 Lmpg over 14,654 miles (4/23/12)
Bests trips: One way 58.2 miles-107.3 mpground trip 116.8 miles-98.5mpgTank: 90.75mpg
2001 Blue CVT "Retired" to the girlfriend - 191k miles my Lmpg 69.3 over 21k miles
Best trip: 56.6 miles-92.3 mpg, round trip 133.6miles-84.3mpg Tank: 623.6 miles 8.30 gallons=75.13mpg 2005MT HCH winter car-52.9Lmpg
It does, but it seems most pronounced under heavy load situations. The car won't allow lean burn and a heavy load.
Lean burn increases the overall efficiency of the engine.. I'll assume it's similar to the Insight engine overall, just with an extra cylinder. More efficiency = less waste heat going out the radiator.
I'm not really sure if that's what is happening here, but it seems plausible. I assume the HCH's intake tract isn't special in any way..
__________________
Insight #1 - Silver '01 5MT @ 158,388 as of 7/11 - Best Tank: 84.5MPG over 807mi
Insight #2 - Silver '01 5MT @ 450,000 as of 1/12 - Best Tank: 86.0MPG over 800mi
Insight #3 - Silver '00 5MT, MIMA #163P, BCM Gauge, OBDIIC&C Gauge, BetterBattery @ 228,869 as of 1/12 - Best Tank: 78.4mpg over 687mi
Ultragauge does have the instruction manual on line. IICR it' like 51 pages long.
I'll see if I can find the link. I think the default setting is at MAF. They were very specific about checking to see if you have a MAP.
Be right back.
HTH
Willie
__________________
01 5 speed. "Little Red Rocket"
The first "TURBOCHARGED" Hybrid, (01/2003)
296,000 mi. @ 58.0 LMPG
2007 Honda Fit, Red Sport AT
1998 Ford F-150, NASCAR "Limited Edition"
(3K made, possibly the prototype one)
We're talking about Intake Air Temperature, not MAP or MAF.
__________________
Insight #1 - Silver '01 5MT @ 158,388 as of 7/11 - Best Tank: 84.5MPG over 807mi
Insight #2 - Silver '01 5MT @ 450,000 as of 1/12 - Best Tank: 86.0MPG over 800mi
Insight #3 - Silver '00 5MT, MIMA #163P, BCM Gauge, OBDIIC&C Gauge, BetterBattery @ 228,869 as of 1/12 - Best Tank: 78.4mpg over 687mi
__________________
Insight #1 - Silver '01 5MT @ 158,388 as of 7/11 - Best Tank: 84.5MPG over 807mi
Insight #2 - Silver '01 5MT @ 450,000 as of 1/12 - Best Tank: 86.0MPG over 800mi
Insight #3 - Silver '00 5MT, MIMA #163P, BCM Gauge, OBDIIC&C Gauge, BetterBattery @ 228,869 as of 1/12 - Best Tank: 78.4mpg over 687mi
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HCHI Intake temperature
) with cruise control on i had intake temps going as high as 105° and wasn't in lean burn. I backed off 1-2mph and was able to maintain lean burn at that speed. Well the intake temps went all the way down to 55° (ambient was low 30's). 
round trip 116.8 miles-98.5mpg Tank: 90.75mpg
