Any new info on Borla exhaust and K and N intake?
05-12-09, 10:18 AM
#18
does anyone have any info on long term reliability with K&N filters? I live in Phoenix and it is really dusty; I worry about the long term effects of slightly more dust entering the engine...
05-12-09, 04:08 PM
#20
has anyone seen an independent dyno on the K&N for the C6 or Z06? They claim like 30+ hp on those too - would be interesting to see what they do in the real world.
I did a google search but didn't find anything easily; but it has to have been done, right?
I did a google search but didn't find anything easily; but it has to have been done, right?
05-12-09, 08:11 PM
#21
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Here the results with a GT 500. I don't know how generalizable this is the ISF given the FI of the GT 500.
Photography: Drew Phillips
k&n, shelby, gt500, cold, ai, Mustang, Corvette, Camar
Installing and testing the K&N AirCharger Intake Kit for the 2007 Shelby GT500
Air filter specialists K&N launched its new AirCharger intake kit for the GT500 (part #63-2571) back in March of 2007. According to K&N, the kit eliminates air restriction caused by the stock intake and dramatically improves air flow to the engine. K&N’s performance kit manager Bert Heck stated that “the factory air box was restricted in size and restrictive in air flow especially at higher RPMs. We made a larger intake tube that fit nicely under the front stabilizer bar.” The kit also features K&N’s million mile warranty, a washable and reusable air filter, and compatability with the factory holes and mounting points. With a claimed horsepower gain of 53.71 at the rear wheels, we couldn’t wait to get our hands on one to test it out. Adam Montague at ST Motorsports in San Bernardino, CA graciously let us use his dyno for testing as well as provide a bone stock GT500 for the test.
The first step was to get some base horsepower numbers. Our first dyno run with the car netted 455.4 horsepower and 433.2 lb-ft torque. According to Adam, this falls right in line with several other tests he has done with stock GT500’s. Next up was installing the K&N kit. Installation was very simple, and the K&N intake bolts into the stock location and fits nicely under the strut tower brace as claimed. With the new intake installed, we put the car back on the dyno to get the new numbers. The result? 483.5 horsepower and 453.6 lb-ft torque, a gain of 28.1 horsepower and 20.4 lb-ft torque. In addition to gaining less horsepower than expected, the extra air had exceeded the MAF sensor’s ability to adjust was now running lean with an air/fuel ratio of 13.4:1 compared to 11.8:1 at stock. After a call to K&N’s tech department, we were told that the PCM did not need to be retuned after installing the intake, but a search on the internet revealed that nearly everyone who had installed the kit was running lean as well.
To find out what kind of horsepower gain the K&N would produce with a safe tune, Adam plugged in a DiabloSport Predator Flash Tuner and used his programming wizardry to add in 10% more fuel to the MAF curve. Another pull on the dyno test and the numbers had dropped down to 468.5 horsepower and 437.1 lb-ft torque, and increase of 13.1 horsepower and 3.9 lb-ft torque over stock. While these numbers weren’t what we were hoping for, the car was now running at a safe air/fuel ratio of 12.0:1.
Despite our disappointing findings, we wanted to see if there was more potential with K&N’s intake. Adam programmed in a 93 octane performance tune along with the additional fuel. Another dyno run later the car was running at 501.2 horsepower and 472.7 lb-ft torque, a gain of 45.8 horsepower and 39.2 lb-ft torque compared to stock. So how much of this gain was due to the new programming? Adam had a database of dyno runs for this particular car and pulled up the numbers for the stock car with the 93 octane tune. At 472.2 horsepower and 455.3 lb-ft torque, the K&N intake helped produce an extra 29 horsepower and 17.4 lb-ft alongside the tune.
Although being under what K&N claims, the gains from the AirCharger intake were still substantial and worked even better with a performance tune from a DiabloSport Predator. The disparity might be in K&N’s baseline horsepower used for their calculations. A dyno sheet provided with the intake kit showed horsepower going from 413.4 to 467.1. While our test car finished with 16.4 more horsepower, it also started with 42 more horsepower. Judging by most dyno results we’ve seen of the stock GT500, anything in the 440-455 range is pretty normal, and 413 seems unusually low for a baseline number.
Overall, the K&N AirCharger intake for the GT500 does provide extra power – 13.1 more than stock, and it especially works well in conjunction with a performance tune providing a combined gain of 45.8 horsepower. From our own as well as others’ findings we would also recommend having the car retuned to prevent the engine from running lean. For more information or to find a retailer visit www.knfilters.com.
Photography: Drew Phillips
k&n, shelby, gt500, cold, ai, Mustang, Corvette, Camar
Installing and testing the K&N AirCharger Intake Kit for the 2007 Shelby GT500
Air filter specialists K&N launched its new AirCharger intake kit for the GT500 (part #63-2571) back in March of 2007. According to K&N, the kit eliminates air restriction caused by the stock intake and dramatically improves air flow to the engine. K&N’s performance kit manager Bert Heck stated that “the factory air box was restricted in size and restrictive in air flow especially at higher RPMs. We made a larger intake tube that fit nicely under the front stabilizer bar.” The kit also features K&N’s million mile warranty, a washable and reusable air filter, and compatability with the factory holes and mounting points. With a claimed horsepower gain of 53.71 at the rear wheels, we couldn’t wait to get our hands on one to test it out. Adam Montague at ST Motorsports in San Bernardino, CA graciously let us use his dyno for testing as well as provide a bone stock GT500 for the test.
The first step was to get some base horsepower numbers. Our first dyno run with the car netted 455.4 horsepower and 433.2 lb-ft torque. According to Adam, this falls right in line with several other tests he has done with stock GT500’s. Next up was installing the K&N kit. Installation was very simple, and the K&N intake bolts into the stock location and fits nicely under the strut tower brace as claimed. With the new intake installed, we put the car back on the dyno to get the new numbers. The result? 483.5 horsepower and 453.6 lb-ft torque, a gain of 28.1 horsepower and 20.4 lb-ft torque. In addition to gaining less horsepower than expected, the extra air had exceeded the MAF sensor’s ability to adjust was now running lean with an air/fuel ratio of 13.4:1 compared to 11.8:1 at stock. After a call to K&N’s tech department, we were told that the PCM did not need to be retuned after installing the intake, but a search on the internet revealed that nearly everyone who had installed the kit was running lean as well.
To find out what kind of horsepower gain the K&N would produce with a safe tune, Adam plugged in a DiabloSport Predator Flash Tuner and used his programming wizardry to add in 10% more fuel to the MAF curve. Another pull on the dyno test and the numbers had dropped down to 468.5 horsepower and 437.1 lb-ft torque, and increase of 13.1 horsepower and 3.9 lb-ft torque over stock. While these numbers weren’t what we were hoping for, the car was now running at a safe air/fuel ratio of 12.0:1.
Despite our disappointing findings, we wanted to see if there was more potential with K&N’s intake. Adam programmed in a 93 octane performance tune along with the additional fuel. Another dyno run later the car was running at 501.2 horsepower and 472.7 lb-ft torque, a gain of 45.8 horsepower and 39.2 lb-ft torque compared to stock. So how much of this gain was due to the new programming? Adam had a database of dyno runs for this particular car and pulled up the numbers for the stock car with the 93 octane tune. At 472.2 horsepower and 455.3 lb-ft torque, the K&N intake helped produce an extra 29 horsepower and 17.4 lb-ft alongside the tune.
Although being under what K&N claims, the gains from the AirCharger intake were still substantial and worked even better with a performance tune from a DiabloSport Predator. The disparity might be in K&N’s baseline horsepower used for their calculations. A dyno sheet provided with the intake kit showed horsepower going from 413.4 to 467.1. While our test car finished with 16.4 more horsepower, it also started with 42 more horsepower. Judging by most dyno results we’ve seen of the stock GT500, anything in the 440-455 range is pretty normal, and 413 seems unusually low for a baseline number.
Overall, the K&N AirCharger intake for the GT500 does provide extra power – 13.1 more than stock, and it especially works well in conjunction with a performance tune providing a combined gain of 45.8 horsepower. From our own as well as others’ findings we would also recommend having the car retuned to prevent the engine from running lean. For more information or to find a retailer visit www.knfilters.com.
05-12-09, 09:14 PM
#22
Tech Info Resource
iTrader: (2)
It's not transferable to the F. Few modern Toyotas respond well to intake mods. The limiting factors in Toyota's designs are typically in the head itself and in the exhaust once the head can breathe. The preliminary results with JoeZ's intake and exhaust support this - the bulk of the gains are on the exhaust side with a very modest gain from the intake.
Intake results are highly model specific. Older Hondas responded very well to intake mods. Modern ones do not. Toyota/Lexus/Scion have not been very responsive to intake mods as far back as the 1993 Supra. I wouldn't bet a nickel on matching K&N's claims on the IS-F.
Intake results are highly model specific. Older Hondas responded very well to intake mods. Modern ones do not. Toyota/Lexus/Scion have not been very responsive to intake mods as far back as the 1993 Supra. I wouldn't bet a nickel on matching K&N's claims on the IS-F.
05-23-09, 06:58 AM
#26
baseline is pretty low at 340..most are dynoing at @ 350..but even if it is a 18hp gain that is still quite ridiculous for an intake, on a Lexus.....
BUT I STILL WANT IT TO BE TRUE!!!
BUT I STILL WANT IT TO BE TRUE!!!
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