TDStuart Tuning Adventure

[GregO]

Also a little update I put the PMAS back on with the new maf and the iat still climbs when I floor it

You reinstalled the PMAS fender well kit or the original designed PMAS engine bay kit ?

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[tdstuart]

You reinstalled the PMAS fender well kit or the original designed PMAS engine bay kit ?

I don’t have the engine bay kit I just have the fenderwell

 

[LOL WUT]

Yep still tuning just haven’t had enough time. I picked up the PCMTEC custom os and am working through some issues with that.

Also a little update I put the PMAS back on with the new maf and the iat still climbs when I floor it

Aren’t IATs naturally going to climb when anyone floors it?

 

[tdstuart]

Aren’t IATs naturally going to climb when anyone floors it?

You would think it is the opposite as during wot more air is flowing which means more fresh air which should mean colder air.

Every other cai I have the iat will drop. Not sure the logic on it raising especially since the maf is out of the engine bay so the engine heat shouldn’t be getting to it.

 

[LOL WUT]

You would think it is the opposite as during wot more air is flowing which means more fresh air which should mean colder air.

Every other cai I have the iat will drop. Not sure the logic on it raising especially since the maf is out of the engine bay so the engine heat shouldn’t be getting to it.

Makes sense, I was thinking motor temps would increase at WOT causing the surrounding air temp to increase and thus IATs. But I guess that may only be applicable after a WOT run is completed.

 

[GregO]

. Not sure the logic on it raising especially since the maf is out of the engine bay so the engine heat shouldn’t be getting to it.

This goes back to my comment earlier in this thread about the MAF sensor relocated in the vertical position.

 

[tdstuart]

This goes back to my comment earlier in this thread about the MAF sensor relocated in the vertical position.

Maybe I should try to get clarification from PMAS again

 

[Grimreaper]

Sounds like the front fender well is getting air from the engine bay if temps rise. The lower fascia is pretty well blocked off to avoid air entering the front going to either side/fender area. Pull a fog light out and see if that helps. Don't think the 350 has fogs and the fender vents are functional. Same idea roush does with their extra cooling package. Front gets opened up to let air in and fender vents become functional/ needed.

 

[junits15]

So you verified that you don’t have the temp rise issue on the stock intake, but do have it on the pmas?

which means it has to be the intake, there’s no other option there

 

[tdstuart]

Sounds like the front fender well is getting air from the engine bay if temps rise. The lower fascia is pretty well blocked off to avoid air entering the front going to either side/fender area. Pull a fog light out and see if that helps. Don't think the 350 has fogs and the fender vents are functional. Same idea roush does with their extra cooling package. Front gets opened up to let air in and fender vents become functional/ needed.

One step ahead of you haha fog light is already removed so especially at speed you would think it has tons of fresh air

 

[tdstuart]

So you verified that you don’t have the temp rise issue on the stock intake, but do have it on the pmas?

which means it has to be the intake, there’s no other option there

Yep temps will drop with stock cai and jlt but for some reason creep up with the PMAS. Not sure if it’s the maf location getting hit with a stream of hot air or what

 

[Pistol_91]

What happened here, you still tuning ?

it blew up.... lol

 

[WildHorse]

which means it has to be the intake, there’s no other option there

IF he's using the 'heat shield' that came with the PMAS, temps will skyrocket.
The JLT is somewhat protected from heat.

EDIT: never mind, he has the fender well.

 

[GregO]

Yep temps will drop with stock cai and jlt but for some reason creep up with the PMAS. Not sure if it’s the maf location getting hit with a stream of hot air or what

Thermal stratification.
Just a guess on my part.
Horizontal MAF sensor isn’t subjected to as large of a temperature gradient as vertical.

You should think about trying my suggestion of using the JLT 120mm MAF to TB tube adapted to the PMAS fender well duct piping/filter. This gets the MAF sensor back to the OEM location. You’ve already verified the transfer functions between the two brands is close enough to interchange.

 

[WildHorse]

Horizontal MAF sensor isn’t subjected to as large of a temperature gradient as vertical.

Good point, the MAF will be relatively cool, while the majority of it will be hot.

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