My friend blew his motor on TSP stage 2

Lagos said:

Yes, you can look at the fuel trims with a $20 OBD2 to Bluetooth dongle and a free app like Torque on your phone.

No, it actually IS that simple. The distance, location and bends do not matter. You can have whatever design you want as long as the section that the MAF bolts on to has the same ID as the OE intake design. That's why PRL doesn't touch the MAF housing and just gives you a silicone pipe so that you can get the sound effects without any change to the flow rate equation.

Trust me on this. I'm an engineer for the automotive industry.

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Design said:

We've seen air turbulence impact maf readings as well. It was a huge problem on the L3VDT TCDI motor, regardless of MAF housing diameter. A well designed intake system factors airflow at various rpms, often by leveraging some form of air straightener to help limit fuel trim spiking.

Here are some basic readings with/without the use of a straightener, all other parameters held constant.

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FlexRex said:

@Design, yea its not something i wanted to argue about but my tuner actually posted a warning explicitly that reassembling some intakes in NOT EXACTLY the same fashion (moving maf 1” this way or turning it only) will affect maf readings. Has graphs too showing it.

He is an engineer too, was w Nasa propulsion systems. Engineering in aerospace and minor in math. Defense dept and military work w propulsion systems. But all that is IRRELEVANT when his statement is based on his own practical experience on dyno w his own car. (He told me to keep my oem intake unless i wanted more noise, my trims are as high as 0.78% on wot and 1-2% on moderate throttle.)

So its not as easy as making sure maf is located in tube w same diameter. But its a different topic.

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FlexRex said:

I am pretty positive that standard oem trims of 10 is the norm in practice. Again same tuner has logs of fuel trims on oem subarus and they are like +/-25% maxes but like from 5-10+ under moderate load. It actually moves quite abit, albeit on a different platform.

Trims i mentioned on my car are once car warms up under specific conditions. Otherwise i record too -20 to 10% on my ap as maxes. Cold idle is like 22% on e50, for example.

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amirza786 said:

I remember this post. There is no follow up, and no evidence that it was caused by the TSP tune. There are also some posts with blown 100 percent stock engines as well. There is always more to the story

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JDMpo0kie said:

Here’s an update on the car. It’s not just the motor that will have to be getting replaced. It blew through to the transmission. Now he needs a new transmission. Dealer wants $3,400 for it. Used it’s around $1,200 give or take. Any one who wants to run high power without upgrading internals or fuel system, think again. These motors may make lots of power for cheap but the repercussions are VERY expensive.

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Israel said:

Really is it posts of Blown stock engines ? I never read a post of stock engine blown out

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JDMpo0kie said:

Here’s an update on the car. It’s not just the motor that will have to be getting replaced. It blew through to the transmission. Now he needs a new transmission. Dealer wants $3,400 for it. Used it’s around $1,200 give or take. Any one who wants to run high power without upgrading internals or fuel system, think again. These motors may make lots of power for cheap but the repercussions are VERY expensive.

Click to expand...

JDMpo0kie said:

Here’s an update on the car. It’s not just the motor that will have to be getting replaced. It blew through to the transmission. Now he needs a new transmission. Dealer wants $3,400 for it. Used it’s around $1,200 give or take. Any one who wants to run high power without upgrading internals or fuel system, think again. These motors may make lots of power for cheap but the repercussions are VERY expensive.

Click to expand...