[Silver Bullet]

I baselined the car at 335 rwhp and 340trq.
This was with the mass air meter screen removed and 1,200 miles on the car.
Redyno'd car with donaldson filter and 3,000 miles and saw 337rwhp and 338 trq.
Car feels no differnt SOP either.
All runs made with hood up and fan blowing in.
Just fyi I dyno'd car with nothing in front of mass air meter and fan blowing full bore and car picked up 7rwhp so maybe a good ram air kit under speed will pick that up.

 

[Zippy]

Mr Bullet:

Wonder if the increased hp was due to the Donaldson, or because the engine had more miles on it, and therefore, more hp?

Zippy /phpBB/images/smiles/icon_smile.gif /phpBB/images/smiles/icon_smile.gif

 

[FRC Tom]

On 2001-06-26 16:00, Silver Bullet spewed forth this drivel:

Just fyi I dyno'd car with nothing in front of mass air meter and fan blowing full bore and car picked up 7rwhp so maybe a good ram air kit under speed will pick that up.

BINGO

 

[SMFCPACFP]

Very interesting. /phpBB/images/smiles/icon_smile.gif

 

[Silver Bullet]

I had a LS1 car that used to pick alot of power with mileage so I would call this a no gain mod in my case.
By the way on my LS1 Formula I never saw any gain with the MTI airbox either so I really don't buy into most of these folks who say they got 15-20 rwhp.
Considering I removed everything and only saw 7rwhp I would question this hard.

 

[Guest]

TO silver bullett what was the temperature and approx humidity when you tested? I do find this strange from all I have read and seen..I have the Donaldson on mine with 1700 miles and it sure did seem to make a difference. BUT #s don't lie....

 

[raj]

Silver, good info, and none too surprising to me! I've always related the mass hysteria over intake mods to "The Emperor's New clothes" phenomenon! /phpBB/images/smiles/icon_wink.gif Even an honest 10 rwhp (which as you've shown is already on the high side for such a mod), is a mere 3% on a car making this much rwhp. Any SOTP feel has to be purely psychological. As for the RAM effect of so-called cold air boxes, this is insignificant at such low subsonic velocites.

 

[50kF360]

I agree with the "emporer has no clothes" theory for most mods. On my '95 M3 the only mod that is agreed on by everyone is a Conforti chip with the cold air intake (25hp/20tq). Even my race mechanic could not believe the SOP difference after installation and he REALLY does not believe in "quicky" mods.
Well, after I dyno'd the car-6hp and 7tq. Granted I haven't done multiple tests with multiple vehicles, but at $300-$1500 for most mods, I'll buy some R compound tires and KNOW I'm much faster. Just one guys opinion. See you on the track.

 

[FRC Tom]

The main advantage of a Cold air system is the outside cooler air being brought in to the engine more than the Ram effect.
The air in the engine compartment in front of the shroud where your filter sits is quite warm if not hot ( the screens do not let air in to this area at speed per Dave Hill ).
I have heard it said that every 5 degrees less in the temp going in to the engine is 1 rwhp, this is why a TB by-pass is used to reduce the heat of the air by eliminating the 200+ degree coolant passing through the bottm of it.
So lets say its 115 degrees at the filter and 80 degrees outside thats 7 rwhp.

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Tom Feuerherm
2001 Z06 Quicksilver/Red
TTS Headers,Bassani X Pipe,Corsa Indys,B&M Ripper, Ram Air, MTI UD Pulley, Computer Programming
360.0 rwhp 353.0 rwtq(SAE)
2000 FRC Mongoose 400
2000 FRC Mongoose 460 (on the injured list)
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[Guest]

I made up my own cold air box that totally enclosed the Donaldson and then montor the PCM. This forces engine to breath only colder outside temps at a higher incoming volume.

Part of the math the PCM uses to dictate air/fuel tables is IAT.
Stock, IAT runs 130 plus degrees.
Cold air box and IAT drops to about 5-10 degrees of whatever outside temps is.
Thus rather then being around 130 degrees it is about 80 and that is a real good to make peformance gains ( using a MAFT to tune out lean condition ramming more air in causes).

IMHO if doing this mod then a re-cal of LTFT should be done else mod is canceled out due to being too lean. Purpose of installing a MAF translator

On a chassie dyno, which is static as to air movement, cold air box would not show much in improvement over stock but get it in real world where even at 80 MPH and no cars in front of ya and the cold air box shows it's purpose.

 

[corvette dave]

Silver, The only way (except track testing)to evaluate a performance mod, in my opinion, is to dyno the car with stock intake. Get a baseline, then immediately put the Donaldson on and dyno again, with maybe 1 hour between runs.
You dynoed maybe a few months ago and dynoed again recently with new intake.
I would not put much faith in the numbers you got. Dyno could be off now or when the original run was made.
Try my method and let us know the numbers.

 

[Silver Bullet]

I agree with what you have said about needing to dyno that same day. However wasn't possible and car has dyno'd 4 seperate times at within 2 rwhp sae corrected.
I agree with emeperors new cloth theory personally.