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Old 02-05-2013, 08:37 AM   #151
amalgrover
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The air coming out of the crank vent enters after the maf sensor and isn't measured by the maf sensor, so I don't understand why you would say that an maf setup would be required to run back to the inlet. If you could please explain your reasoning on this, I would really appreciate it.

I ran VTA on maf setup for a LONG time on my personal vehicle, and had no issues whatsoever. I also know of quite a few shops that run VTA with maf setups without issue as well.
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Old 02-05-2013, 08:51 AM   #152
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Quote:
Originally Posted by Phatron View Post
dual intercoolers ftw
...

Quote:
Originally Posted by amalgrover View Post
The air coming out of the crank vent enters after the maf sensor and isn't measured by the maf sensor, so I don't understand why you would say that an maf setup would be required to run back to the inlet. If you could please explain your reasoning on this, I would really appreciate it.

I ran VTA on maf setup for a LONG time on my personal vehicle, and had no issues whatsoever. I also know of quite a few shops that run VTA with maf setups without issue as well.
Well my APS CAI doesn't work with the Perrin FMIC. I have Amsoil filter and is too big and hits the tire.

So we are going to Speed Density.

Does anyone have a suggestion or were to install the IAT sensor?



Does it have to be on a straight section?
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Old 02-05-2013, 08:59 AM   #153
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If actually planning to move the sensor, you are going to want it as close to the cylinder as possible because the IAT sensor's whole purpose in speed density is to estimate cylinder charge temps. So, the closer you get it to the actual entry of the cylinder, the more accurate these estimates will be.
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Old 02-05-2013, 09:19 AM   #154
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Does anyone have a suggestion or were to install the IAT sensor?

Does it have to be on a straight section?
Place the IAT sensor right in front of the throttle body, use a chunk of stainless steel tubing as its less prone to heat soak than aluminum 321 is better than 304.
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Old 02-05-2013, 09:49 AM   #155
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Quote:
Originally Posted by amalgrover View Post
The air coming out of the crank vent enters after the maf sensor and isn't measured by the maf sensor, so I don't understand why you would say that an maf setup would be required to run back to the inlet. If you could please explain your reasoning on this, I would really appreciate it.

I ran VTA on maf setup for a LONG time on my personal vehicle, and had no issues whatsoever. I also know of quite a few shops that run VTA with maf setups without issue as well.
And its already combusted air so it wouldn't need to be metered again.
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Old 02-05-2013, 10:36 AM   #156
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Place the IAT sensor right in front of the throttle body, use a chunk of stainless steel tubing as its less prone to heat soak than aluminum 321 is better than 304.
what do you mean by chunk of tubing?

It has to be on that intercooler pipe that connects to the throttle body. I think the Perrin piping is STN STL but I am not sure. The location of the pipe sucks, it goes over the turbo and then besides the coolant filler tank .
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Old 02-05-2013, 12:05 PM   #157
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Originally Posted by juanmedina View Post

what do you mean by chunk of tubing?

It has to be on that intercooler pipe that connects to the throttle body. I think the Perrin piping is STN STL but I am not sure. The location of the pipe sucks, it goes over the turbo and then besides the coolant filler tank .
I meant that you should add a chunk of SS for the IAT sensor if the IC piping is all aluminum which I think the Perrin is.
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Old 02-05-2013, 12:27 PM   #158
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I meant that you should add a chunk of SS for the IAT sensor if the IC piping is all aluminum which I think the Perrin is.
yes you are correct the piping is made of aluminum. I guess I can wrap the sensor with gold tape or something.

Last edited by juanmedina; 02-05-2013 at 12:43 PM.
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Old 02-05-2013, 12:43 PM   #159
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And its already combusted air so it wouldn't need to be metered again.
This is what I thought too, which is why I was wondering why it would matter if someone was maf vs SD...figured fastblueufo is a smart guy and may know some secret I don't...
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Old 02-05-2013, 12:50 PM   #160
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I meant that you should add a chunk of SS for the IAT sensor if the IC piping is all aluminum which I think the Perrin is.
You are going to want to be careful mating SS to aluminum...not saying don't, but I would plan this out carefully. SS and aluminum touching each other in an area exposed to the elements and constant heating and cooling cycles are possibly going to see corrosion if it isn't cared for properly.

Also, SS may be less prone to heatsoak, but it is also much harder to cool down once it does. My IC piping is SS instead of aluminum, and it takes much longer to cool it down than similar setups running aluminum piping...it also takes much longer to heat up vs aluminum piping too though. It is a tradeoff...
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Old 02-05-2013, 12:53 PM   #161
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You are going to want to be careful mating SS to aluminum...not saying don't, but I would plan this out carefully. SS and aluminum touching each other in an area exposed to the elements and constant heating and cooling cycles are possibly going to see corrosion if it isn't cared for properly.

Also, SS may be less prone to heatsoak, but it is also much harder to cool down once it does. My IC piping is SS instead of aluminum, and it takes much longer to cool it down than similar setups running aluminum piping...it also takes much longer to heat up vs aluminum piping too though. It is a tradeoff...
yeap..

how about this guy IAT sensor location?



I ordered the bung and the sensor, hopefully I will have my car up and running soon.
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Old 02-05-2013, 03:11 PM   #162
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According to you graph you made 527whp at 28psi and trapped 136mph . Mine should be somewhat lighter than your, we will see what I trap.
On the dyno 28 psi yes. On the street no...30-31 psi

Quit being skeered.
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Old 02-05-2013, 03:15 PM   #163
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Turbo blanket the turbo and relocated the coolant tank = happier temps.
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Old 02-05-2013, 04:04 PM   #164
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Originally Posted by amalgrover View Post
You are going to want to be careful mating SS to aluminum...not saying don't, but I would plan this out carefully. SS and aluminum touching each other in an area exposed to the elements and constant heating and cooling cycles are possibly going to see corrosion if it isn't cared for properly.

Also, SS may be less prone to heatsoak, but it is also much harder to cool down once it does. My IC piping is SS instead of aluminum, and it takes much longer to cool it down than similar setups running aluminum piping...it also takes much longer to heat up vs aluminum piping too though. It is a tradeoff...
You are going to have a silicone coupler connecting the aluminum and the SS piping both will hopefully have beaded ends and t-bolt clamps on the coupler! If you're really concerned about galvanic corrosion between the 2 metals then you can coat the aluminum but it should not be necessary. I would take the SS's better resistance to heat conduction over the better cooling properties of the aluminum! JMHO

Regardless get the IAT as close to the TB as possible without picking up heat from the surrounding components.
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Old 02-05-2013, 08:45 PM   #165
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ahhh...I thought you were saying to weld a piece of SS to the aluminum...
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Old 02-05-2013, 09:55 PM   #166
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OK, now I see why you were concerned about the galvanic reaction/ corrosion. I would never weld the two!
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Old 02-06-2013, 09:30 AM   #167
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Juan, Here's one way to do it, but it involves taking off the IM.

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Old 02-16-2013, 07:09 PM   #168
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Any updates?
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Old 02-17-2013, 07:06 PM   #169
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Any updates?
I am on SD .

The car is super smooth and really quiet during cruising vs maf. Ron has done an amazing job with the tune. It seems that I lost about 200rpm of spool but the whp/wtq gains have been significant. I probably will be swapping the 1200cc injectors for the 2200cc injectors very soon.

Last edited by juanmedina; 02-17-2013 at 08:06 PM.
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Old 02-17-2013, 08:04 PM   #170
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Told u sd was the way to go. What kind of power are u seeing as we speak?

Last edited by Slimsti; 02-17-2013 at 08:23 PM.
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Old 02-17-2013, 10:53 PM   #171
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I am on SD .

The car is super smooth and really quiet during cruising vs maf. Ron has done an amazing job with the tune. It seems that I lost about 200rpm of spool but the whp/wtq gains have been significant. I probably will be swapping the 1200cc injectors for the 2200cc injectors very soon.
SD is the **** with these bigger snails for sure! I'll bet the FMIC. accounts for some of that spool lost. Are you guys sure you can't get more out of the 1200's? You did the re-wire of the pump and you have the big Wally right? What your base at? You could also do a boost a pump!
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Old 02-18-2013, 01:24 AM   #172
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Juan, Here's one way to do it, but it involves taking off the IM.

That see's a lot of heat soak though, which makes for a pretty inaccurate signal.
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Old 02-18-2013, 02:16 AM   #173
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didnt see anything in his mod list that said fpr, that be a good amount of money to swap his lines/fittings and buy a regulator, if he doesnt have any rails or lines now, even more, could easily spend 350-500 on all of it, sure having the fpr makes adj nice, but im sure he'd rather get new injectors instead
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Old 02-18-2013, 08:07 AM   #174
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did you do that pull in 4rd gear? lol
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Old 02-18-2013, 08:42 AM   #175
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didnt see anything in his mod list that said fpr, that be a good amount of money to swap his lines/fittings and buy a regulator, if he doesnt have any rails or lines now, even more, could easily spend 350-500 on all of it, sure having the fpr makes adj nice, but im sure he'd rather get new injectors instead
Yeah easy 500 but I would think that Juan would want a FPR anyways and with a higher base pressure, the big pump re-wired he may have enough injector now!
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