Intake temperature?

[Kibwe Walker]

Originally Posted by Barefoot

Ok, well you were asking for number with things like FMIC vs SMIC, but they would have little affect on the intake temps at the MAS.. They would affect the temps, but not nearly as much as they would a reading only a few inches away from the TB.

I was thinking more along the lines as to the path air takes to get into the engine bay. With a FMIC you have FMIC, then radiator, then engine bay, and then air filter.

I was wonder if it had a effect if any, if it did maybe some numbers across the board would shed some light as to just how much of a effect there is. Either way your numbers would be nice with and without meth at the TB.

[Barefoot]

Originally Posted by Kibwe Walker

I was thinking more along the lines as to the path air takes to get into the engine bay. With a FMIC you have FMIC, then radiator, then engine bay, and then air filter.

I was wonder if it had a effect if any, if it did maybe some numbers across the board would shed some light as to just how much of a effect there is. Either way your numbers would be nice with and without meth at the TB.

I will post up my numbers this weekend, hopefully. I cannot get a post Meth number though as I have meth installed after the IAT.. not to mention meth would destroy the sensor

[a2j]

so, that temp number that datalogger gives you is temp at the MAS?
I noticed it hotter at idle and colder when engine under some load. and I'd say its about 10-20 deg diff between outside temp and cruising.

[simace]

Here's a log I did back in Oct 2007. Ambient temp was about 65*....

http://mysite.verizon.net/ermora/OBDII_04.xls

Hope this is useful...

[MichaelMR2]

Guys, can people please include if they are doing C or F...

This thread will rawk, you see I've been bitterly complaining about all these stupid air filters that sit in the engine pay pulling air from IN the engine bay...(pod filters)

with the HHH Logged I've seen from 26 C on cold nights up to 67 C on warm days, at 67 C the car has MUCH less power (Hate to imagine how much the timing is being pulled)...

I'd love to see stats on what temperatures you really need to achieve to make what power keep it going guys, I'll dump some spreadsheets here over the next few days.

[spfan]

i've got a bunch of old logs from when i was bpu, and right after putting the phantoms on. can't remember if i have any with the stock airbox on or not. one thing that i always found interesting, the longer you stay on the throttle, the air going into the mas actually rises in temp, even as you increase in speed. graphed with temp as the Y axis, and time as the X axis, it sorta looks like a U, or a check mark. i could post up some of that if it would help at all. it was so long ago that i can't remember any exact temps outside, but could guestimate based on date logged and time of day (night, winter, in ohio, etc).

and i don't have my car here in florida yet, but will soon. and i know i have the stock airbox still. it wouldn't be much to do a couple pulls back to back with the different filters once it's all here. stock hood though (which i know is what you're looking for).

[Boostaddict]

If you are measuring at the mass the thread should probably be called under-hood temps, not intake temps. To me intake temp implies the actual charge temp going into the engine, which most of us measure at some point close to the intake manifold (via ait sensor). Low underhood temps are good if you have an efficient intercooling setup... a crappy intercooling setup will still result in high intake air charge temps regardless of under-hood temp

[Kibwe Walker]

Originally Posted by Boostaddict

If you are measuring at the mass the thread should probably be called under-hood temps, not intake temps. To me intake temp implies the actual charge temp going into the engine, which most of us measure at some point close to the intake manifold (via ait sensor). Low underhood temps are good if you have an efficient intercooling setup... a crappy intercooling setup will still result in high intake air charge temps regardless of under-hood temp

even so with a good IC setup you still want better air temps entering the system.

Just my by MAS its as much as 100 degree difference entering the system. On a cold night I can see 3x degrees at the MAS and on a warm day like today its in the 13x at the MAS. That 100 degree difference has a impact at the TB. If you lower the intake temps at the MAS you are lowering the intake temps down the line too because the IC's don't have to work as hard. I mean they are air to air aside from Xwire, there is only so much they can do in the microseconds that the air spends traveling through the intake.

I wish someone with a cold air wall, or one of those ram air hoods (victory,575), and even purely vented hoods like the evo could give numbers. You always hear of but dynos and even some comment of their times and top end improvement. Now lets get some numbers as to why.

[Barefoot]

Originally Posted by Kibwe Walker

even so with a good IC setup you still want better air temps entering the system.

Just my by MAS its as much as 100 degree difference entering the system. On a cold night I can see 3x degrees at the MAS and on a warm day like today its in the 13x at the MAS. That 100 degree difference has a impact at the TB. If you lower the intake temps at the MAS you are lowering the intake temps down the line too because the IC's don't have to work as hard. I mean they are air to air aside from Xwire, there is only so much they can do in the microseconds that the air spends traveling through the intake.

I wish someone with a cold air wall, or one of those ram air hoods (victory,575), and even purely vented hoods like the evo could give numbers. You always hear of but dynos and even some comment of their times and top end improvement. Now lets get some numbers as to why.

That's very true. I still have not had the time to fix my lower intake plenum yet, so I can't give numbers yet.

Like I mentioned before though, when I initially put the Victory hood on my car, it lowered the underhood temps enough to lower my Intake temps at the TB by 10-15* F

[SkortchGT]

Awesome, it's about time we have a serious discussion on this.

I have one question, has anyone ever driven their VR4 with the hood off? It's like a shot of adrenaline.

Cooler temps entering through the intake/MAS = more power. I really wish there were more hood options that place emphasis on this. Maybe an Evo style hood, but for a 3/S, with a vent and an induction right over the filter area in addition to the screening holes in the center.

I know GTPRO made an Evo style hood for the 2nd gen guys a while back, but never heard anything about 1st gen hoods.