Best Intake for optimum performance?? - Page 3 - Subaru WRX Forum
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post #31 of 44 Old 06-09-2009, 11:27 PM
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If you can find someone that has one, its too easy to make. Me and a friend are going to make one for his 07, hes running the SPT. I left it in because the directions said so and I didnt want to have another car part laying around the house, lol.

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post #32 of 44 Old 06-18-2009, 12:29 AM Thread Starter
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i have been looking at a perrin big maf and the intake looks ba and they say it performs well but they warn you not to install unless your getting a tune .... so idk if i should go with somthing like that or if i should go with another one that dosnt need a tune granted iknow you need to get a tune for the upgrades you put on to get the most outta them but i am not fully ready to get it tuned want to get some other parts first before i get it tuned!!! idk has anyone heard any reports on the perrin big maf?
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post #33 of 44 Old 06-18-2009, 08:29 AM
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From Gruppe-S:
The Perrin "Big MAF" intake is ideal for larger than stock turbos that require increased airflow. This intake will allow the user to tune an aftermarket ECU safely and accurately by adding resolution in fuel maps and load columns, compensating for air fuel ratio, idle, and wide open throttle maps.

The PERRIN Performance™ Big MAF intake system is designed to prevent the Mass Air Flow output value from being pegged on heavily modified WRX engines. When using the factory MAF sensor and adding large amounts of boost the stock MAF sensor will max out and not allow additional compensation for air flow.

Not needed for VF turbos.
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post #34 of 44 Old 06-18-2009, 02:42 PM
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Yea cause I have a 20g and I can't even hit boost because of my maf. I was thinking of going with the Perrin Big MAF.
But I was also looking into the Greddy Airinx intake, anyone konw about that intake???
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post #35 of 44 Old 06-19-2009, 01:06 PM
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What do you mean doesn't hit boost? It should, a 20g is big but its not like a 30 or 35 that has alot of airflow coming in that you cant be ok with a stock MAF. I fail to believe that.
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post #36 of 44 Old 06-21-2009, 06:35 PM
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Have you looked into the AVO turbo inlet and intake filter ? My buddy had this setup on his 06 STI and he loved it. Its a little more spendy this way but from the turbo inlet all the way up to the intake filter, its one giant piece of silicon hose, so it will flow really good. Its probably a little harder to install and I'll probably do my TGV deletes at the same time i get this on so I can get a tune for both at the same time. Any ways, the inlet hose is like $299.99 I think and the MAF housing + filter is like $180. But I cant wait to get mine. These prices are off Rallitek.com. You can probably find them cheaper if you look around though. This intake is for "larger then stock" turbo's, but I do plan on upgrading my turbo eventually. You should also think ahead about your future plans for your car before you just throw an intake on there.
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post #37 of 44 Old 06-21-2009, 07:50 PM
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I have re-read through this, and I see the problem you are havin. My tuner tuned a WRX with a 20G and an STI I/C, injectors, and DP, stock intak, and gt 330+ HP out of the car. But if you are having troubles what does your tuner suggest?

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post #38 of 44 Old 06-22-2009, 12:14 AM
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Yea the 20g is big and I didn't think it will f up the maf neither but it did because when I unplugged the maf sensor it hit boost. Not as hard but it hit. So the 20g did f up the maf sensor.
I havent gotten it tuned yet. I am going to be doing an opensource tune pretty soon.
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post #39 of 44 Old 06-22-2009, 12:25 AM
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Sry what I mean by hit boost is I couldn't go past 4300 rpms where my boost kicked in.
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post #40 of 44 Old 06-22-2009, 01:26 AM
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Quote:
Originally Posted by man show View Post
I wonder if any WRX/STi owners with a fmic kept their stock hood scoop and made a custom air duct connecting that to their air filter to get all kinds of cold air into the engine. I guess the main issue with that would be scooping water, but it's a thought.. I guess.. Or maybe just re-route the intake so the filter is where the old tmic used to sit - but again with the water. Hmm... Don't drive when it rains.
like this? -

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post #41 of 44 Old 06-22-2009, 03:54 PM
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like this? -

Im in love
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post #42 of 44 Old 06-26-2009, 06:16 PM
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Ok so does anyone know the diameters in mm for the perrin big maf and the spt intakes? Just curious as to which one is bigger which I am sure the perrin is.
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post #43 of 44 Old 06-26-2009, 07:34 PM Thread Starter
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wow sorry for not replying sooner i am in el paso tx working on fort bliss and been extremely busy!! but i am glad i asked about the perrin big maf becuz my birthday was just last week and my dad asked ### i wanted and i jokingly said get me a cai for my car and he went for it so i didntg argue lol when he asked which one i told him a perrin cai is ### i was looking at and he had found the perrin big maf and said he was thinkin of getting me that one .... now that i know that its for heavily modded wrxs i wont go with it ... thansk for the info it has been real helpful!!! now to go back to drawing board on which one i want lol
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post #44 of 44 Old 06-26-2009, 08:44 PM
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Like said earlier,you cannot use the Perrin big MAF without a custom tune or you can kiss your engine good bye.Your will run incredibly lean.

"NOTE: Requires aftermarket ECU Tuning. "
Perrin Performance - Intake Short Ram BigMAF

And from the installation instructions:
"NOTE: THIS INTAKE SYSTEM IS NOT DESIGNED FOR USE ON
OTHERWISE STOCK VEHICLES. PROPER TUNING USING AFTERMARKET ELECTRONICS ARE REQUIRED FOR PROPER AIR/FUEL
METERING, TIMING AND BOOST PRESSURE. INSTALLATION ON ANY VEHICLE WITHOUT PROPER COMPENSATION WILL CAUSE
CATASTROPHIC DAMAGE TO THE ENGINE! PERRIN PERFORMANCE IS NOT RESPONSIBLE FOR DAMAGE AS A RESULT OF
INSTALLATION! CONTACT YOUR DEALER OR TECH@PERRINPERFORMANCE.COM"

And yes,the Big MAF is considerably bigger than the SPT.......................

Homebrewed tuned with Opensource!
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