CIA & exhaust M45

[New2Import]

What CIA is affordable for the M45? I was just thinking of making my own but I need to see one first. I also did some searching for exhaust and I love the sound of the Megan exhaust. How does it perform (CFM #s)? Where can I purchase a set of mufflers?

[M4T5]

The cold air kits don't help our cars run better at ALL! It has already been proven. So get past the idea. The Megan axle back kit sounds good, but adds no performance gains unless you you buy the mid section pipes they sell as well...separately.Though no one has reported performance gains from the Megan exhaust.Element 114 and Stillen however do make exhaust kits that add performance and better sound. Though neither of the companies produce a quad style exhaust exit look. That's too bad too......

J

[New2Import]

Any sounds clips of the Element? Ive heard SLP and didnt like it at all.

[ken in az]

There's a post with an install write up and down in the thread a bit are a few youtube vids of how it sounds....and it sounds good!! He just posted a link to an ebay auction with a very good deal on the system as well.

Oh, and don't count out the cold air intakes yet. I have a feeling that the manufacturers mad an error when the designed them. I'm going to start a thread to try and help figure out if the problem is what I think it is.

[odie]

szhosain, can you please e-mail me about setting up a sticky for M35/45 performance parts available for the M35/M45? I wouldn't mind spending some time this weekend to create one.

[M4T5]

There's a post with an install write up and down in the thread a bit are a few youtube vids of how it sounds....and it sounds good!! He just posted a link to an ebay auction with a very good deal on the system as well.

Oh, and don't count out the cold air intakes yet. I have a feeling that the manufacturers mad an error when the designed them. I'm going to start a thread to try and help figure out if the problem is what I think it is.

What do you think the problem is? Please email me your theory if you don't want to post it.Just from the top of my head on the thought about the problem(s): 1. The intake piping too large or not tapered to adequately flow air to the TB.2. The aluminum piping is getting too hot under the hood. Needs insulation. By the way, changing to plastic piping over aluminum would not benefit this issue. I've read articles about how metal piping flows air better than plastic piping. 3. The MAF could be placed in the wrong spot.4. There may also be a need of a air velocity ram. (Basically a reserve container connected to the air intake tubing to feed more air when needed).5. There may be a need for custom tuning for the air/ fuel ratio to accommodate the extra CFM air flow.

These are just my off the top of my head thoughts.... Anyone else??

J

[nadzak]

I guess my question is: If the Cold Air kit does not help performance, does it actually hurt it? I have a 2008 M35 with Stillen Exhaust and Injen Cold Air. Don't know the difference between that and stock, since I added those upgrades when it was brand spanking new and never had the ability to test the stock to the max...

[New2Import]

szhosain, can you please e-mail me about setting up a sticky for M35/45 performance parts available for the M35/M45? I wouldn't mind spending some time this weekend to create one.

That would be awsome and also a sticky or add it to the thread of the vendors?

[ken in az]

What do you think the problem is? Please email me your theory if you don't want to post it.Just from the top of my head on the thought about the problem(s): 1. The intake piping too large or not tapered to adequately flow air to the TB.2. The aluminum piping is getting too hot under the hood. Needs insulation. By the way, changing to plastic piping over aluminum would not benefit this issue. I've read articles about how metal piping flows air better than plastic piping. 3. The MAF could be placed in the wrong spot.4. There may also be a need of a air velocity ram. (Basically a reserve container connected to the air intake tubing to feed more air when needed).5. There may be a need for custom tuning for the air/ fuel ratio to accommodate the extra CFM air flow.

These are just my off the top of my head thoughts.... Anyone else??

J

I have a feeling that the internal diameter of the pipe where the MAF sensor sits is not the correct size. I had my airbox out the other night and I measured the internal diameter of the stock peice and got 81mm exactly which is slightly larger than 3 inches.

If the internal diameter of the tube changes, then the sensor will have false readings. Basically more or less air will be flowing through the pipe and the sensor was conly calibrated for that pipe size.

Nissan/infiniti base almost every engine parameter off this single sensor, such as fuel flow, ignition timing, valve timing, power valve, etc.. and if the sensor isn't reading the correct airflow then your mixtures will be off and the timing won't be right.

If someone could pull the intake and measure the internal diameter of the pipe then we could know if that is the case.

1. The intake piping too large or not tapered to adequately flow air to the TB. I think the size is fine for flow, just not right for the MAF sensor

2. The aluminum piping is getting too hot under the hood. Needs insulation. By the way, changing to plastic piping over aluminum would not benefit this issue. I've read articles about how metal piping flows air better than plastic piping. I've actually heard the opposite because plastic has a lower coefficient of friction, but that it is really only noticable when using liquids

3. The MAF could be placed in the wrong spot. I don't think location is important, just that the MAF be placed in a straight section of correctly sized tubing.

4. There may also be a need of a air velocity ram. (Basically a reserve container connected to the air intake tubing to feed more air when needed). A velocity stack definitely helps, the stock 305z's got them in 08 I beleive so if the factory is using them - they gotta be good

5. There may be a need for custom tuning for the air/ fuel ratio to accommodate the extra CFM air flow. Yeah, the more air you flow, the farther away from the stock parameters the ecu was designed to work with. A tune will give new parameters to allow for increased airflow and more power.