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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 08-10-2020, 01:18 AM   #15
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Did you relocate IAT sensor to post blower?

Or is that just pre blower temps from the MAF?
I relocated to post blowers

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Old 08-10-2020, 07:34 AM   #16
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Almost all FI kits maintain MAF in stock position, so everyone's IAT measurements will not show the real deal. Given your location, the MAF itself may be heat soaking as well.

120F or 50C post blower wouldn't be anything to worry about, we get that ambient near the road around here.

I've seen 60C on the pre-turbo MAF during a track session before I decided to pull the trigger on meth.
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Old 08-10-2020, 08:54 AM   #17
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Almost all FI kits maintain MAF in stock position, so everyone's IAT measurements will not show the real deal. Given your location, the MAF itself may be heat soaking as well.

120F or 50C post blower wouldn't be anything to worry about, we get that ambient near the road around here.

I've seen 60C on the pre-turbo MAF during a track session before I decided to pull the trigger on meth.
Pretty sure all the centrifugal superchargers have MAF post blower. and a lot of turbos as well. positive displacements are the only ones that would need to relocate.
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Old 08-10-2020, 08:59 AM   #18
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I relocated to post blowers

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yeah i know yours is post blower so your getting "true" IATs, but i still think they are possibly falsely high when under boost just because of close proximity to engine and the MAF "housing" is metal which probably heat-soaks and keeps the MAF from reading the lower boosted air temp correctly. Even if this isn't the case and its reading correctly at 120F in 90F ambient that still isn't bad.
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Old 08-10-2020, 10:36 AM   #19
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My JRSC setup hit 150F IAT at the track last month in mid 90F summer heat.
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Old 08-10-2020, 10:36 AM   #20
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Old 08-10-2020, 03:03 PM   #21
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My JRSC setup hit 150F IAT at the track last month in mid 90F summer heat.
See this is cool for me cuz youre hitting 150f with an intercooler and me without one I'm hitting 120f

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Old 08-10-2020, 03:42 PM   #22
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See this is cool for me cuz youre hitting 150f with an intercooler and me without one I'm hitting 120f

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In track conditions?
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Old 08-10-2020, 03:56 PM   #23
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In track conditions?
No Not track but back back pulls to red line

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Old 08-13-2020, 02:31 PM   #24
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Originally Posted by 86TOYO2k17 View Post
Pretty sure all the centrifugal superchargers have MAF post blower. and a lot of turbos as well. positive displacements are the only ones that would need to relocate.
Good point, looks like a lot of them are! My Avo kit is pre-MAF so I guess I was biased.

On this point I feel like I should be monitoring the post-intercooler temps more closely...any recommendations as to gauges or tapoff ports on the manifold? The only ones I see are the PCV one I've deleted on top of the manifold, and the evap one below.

Nice data! Looks like post-intercooler you're ~10C above amb, and under load + heatsoak it's ~35C above. What is the peak boost on this centrifugal?

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Old 08-13-2020, 02:55 PM   #25
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@TurboBRZ_UAE One of the MAF wires is for temp, you can NPT tap somewhere post FI put in a threaded temp sensor cut the one maf wire and wire it in. Then the IAT the ecu reads will be accurate post FI temps. Someone had a small write up about this for more details and which wire etc, I think it was @Kodename47
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Old 08-13-2020, 05:32 PM   #26
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I can't find the info on the wire colours but it just needs 2 to be taken from the MAF and passed to an IAT sensor. I can't find any pics from my install so I'll have to go and have a look in the daylight.
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Old 08-13-2020, 10:52 PM   #27
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Yeah you donít need to. But itís not real IAT temps.

OP trying to figure out what post FI boost temps are if he should intercool or not. As far as i know all PD blowers only measure pre FI/boost temps. So we have no idea how effective our intercoolers are. Unless relocated.

Need to ask turbos and centrifugal supercharger owners as they can give a real ambient temp vs post blower temps.

Also temps while cruising are sort of irrelevant especially for OPs question. Need IATs during a long pull.
Edelbrock uses a TMAP and hijacks the IAT to give you a proper charge temp reading.
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Old 08-13-2020, 10:53 PM   #28
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I typically see about 30F over ambient at 10.5 psi.

GReddy T518Z kit, with JDL intercooler upgrade and custom ducting.

Oil temps never exceed 225F, regardless of ambient temp; turbo is oil cooled.
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