[aakrusen]

I am looking into a protune and I was going to add an APS intake. However, I've heard that these intakes can mess up the MAF, is that true? Does it matter which intake I put on? Is there enough difference between the 65 and 70mm to justify paying more for the 70mm? Can I put either of these intakes on the car before I get the tune? I was thinking of installing it on the day of the tune and driving there (5 hour drive).

[FlyingPerformance]

What are your other mods? If your tuner can't scale an APS 65(doesnt require much at all) or an APS 70mm I wouldnt trust him to tune the rest of the car.

[jasv11]

Originally Posted by aakrusen

I am looking into a protune and I was going to add an APS intake. However, I've heard that these intakes can mess up the MAF, is that true? Does it matter which intake I put on? Is there enough difference between the 65 and 70mm to justify paying more for the 70mm? Can I put either of these intakes on the car before I get the tune? I was thinking of installing it on the day of the tune and driving there (5 hour drive).

Are you stock turbo? Won't make a difference in power if you are.....just more wooshing sound.

65mm I beleive you can drive it but I know for sure you can not drive it to your tune with a 70mm on

On the stock turbo your stock airbox is not a restriction.

[USNSTI]

If you put on the 70 it will make your car run like **** until you get it tuned. According to the APS product description the 65 doesn't have this effect without a tune. Although it is generally accepted that running an intake without a tune is risky. I would say get the 70 and get tuned. Then you won't have to buy another intake if you upgrade the turbo later.....

[aakrusen]

Originally Posted by USNSTI

If you put on the 70 it will make your car run like **** until you get it tuned. According to the APS product description the 65 doesn't have this effect without a tune. Although it is generally accepted that running an intake without a tune is risky. I would say get the 70 and get tuned. Then you won't have to buy another intake if you upgrade the turbo later.....

That's the impression I had. What am I gaining from the 70 over the 65? It looks like the section of the tube where the MAF is located is the same size on both intakes. To me it looks like the front half of the tube is just bigger on the 70mm, yes?

AP stg 2 for now. Walbro, new NGK's, and the APS intake will all be accompanied with a protune from Tim Baley. I'll put the Walbro and NGK's in before I drive to the tune and I guess I'll put the intake on when I get there.

[Turbineguy]

The 65mm is pretty much good for anything that bolts in the stock location turbo wise IMHO. After that you go rotated and stick a shorty in anyway. +1 for finding a new tuner if yours can't scale the intake. Do not drive with an untuned 70mm.

[STISubSilver]

When you say untuned do you mean a protune or a stg 1 AP map? The APS 70mm disclaimer mentions an ECU tune and nothing more.

[Szumita]

a 65mm w/o tune will be ok. a 70mm will not.

i wouldent with an 07 though...

[bluedemon_II]

Originally Posted by STISubSilver

When you say untuned do you mean a protune or a stg 1 AP map? The APS 70mm disclaimer mentions an ECU tune and nothing more.

Ap stage 1 calibration is not intended to be used with any sort of intake that is not the stock box or cobbs sri. If you slap a 70mm intake on anything that is not tuned for it "Scaled the maf to compensate for the extra 5mm of flow area, the car will run dangerously lean everywhere and we all know where this will lead.

When we state Get it tuned, you have to scale the maf by logging and comparing certain parameters that will tell you if the intake is scaled correctly. But then again your tuner should know how to do this, I'm learning to do all this tings because I don't trust anyone in my area with my car after i have seen the effects of the tunes they make.

For an example... Running 14.0:1 Af on upper load points at 5,000+ .
To the OP- Ask the tuner if he can scale the maf, if something like " we don't need to do that" pops up, ditch him and go to a renown tuner.

[nhat]

intake testing by harman motive: Harman Motive Blog

their tests showed that most intakes without a tune will add about ~10whp, and some are more dangerous than others without a retune.

the aps 65mm made my car run richer (according to wb02) without scaling for the maf.

[La Mer]

Originally Posted by FlyingPerformance

What are your other mods? If your tuner can't scale an APS 65(doesnt require much at all) or an APS 70mm I wouldnt trust him to tune the rest of the car.

Originally Posted by bluedemon_II

Ap stage 1 calibration is not intended to be used with any sort of intake that is not the stock box or cobbs sri. If you slap a 70mm intake on anything that is not tuned for it "Scaled the maf to compensate for the extra 5mm of flow area, the car will run dangerously lean everywhere and we all know where this will lead.

When we state Get it tuned, you have to scale the maf by logging and comparing certain parameters that will tell you if the intake is scaled correctly. But then again your tuner should know how to do this, I'm learning to do all this tings because I don't trust anyone in my area with my car after i have seen the effects of the tunes they make.

For an example... Running 14.0:1 Af on upper load points at 5,000+ .
To the OP- Ask the tuner if he can scale the maf, if something like " we don't need to do that" pops up, ditch him and go to a renown tuner.

There's your answer(s).

IMO running a 70mm without a turbo inlet is pretty much defeating the purpose. I would stick with the 65mm on a stock turbo inlet.

65mm - Put on before your tune, and drive to the tuner. I wouldn't go WOT until I have logged/scaled the MAF (in your case, the tuner will do this).

70mm - Install when you arrive at the tuner's shop.

[gabedude]

The 65 measures a tad less air than is entering the engine. The 70 meters even less, so yes, you need to adjust the MAF scale on both. As for the 07 STI scaling, it is so far off stock that the APS 65 mm brings it in line with the O/L fuel map and LTFT (D range that is carried into open loop) stays near 0. Great intake I must say.