Supercharger Info - Please Read

[bkoneski47]

Carson City Toyota and Nashua Toyota (Nashua, NH) are the two biggest TRD dealers in the country. The other day, a rep at Nashua had informed me about some pretty interesting info about the Supercharger. There's been a lot of debate in these forums about the K&N FIPK as to if they are better or worse on the Tundra. They have a 2001 demo truck with the S.C. installed and originally had the stock airbox. They then put on the FIPK and had a noticable increase in performance. They even dyno'd it both ways, and the K&N proved to increase the HP. The reason TRD tells everyone to use the stock airbox is because that is the way it was designed to work with. The engineers at TRD never tried the FIPK. When the FIPK was installed with the S.C., people were producing more HP and torque, and breaking the rear axles. He also stated that new Tundra's coming out have a stronger rearend and TRD is going to make that generation Supercharger with 2 (that's right, TWO) supplemental fuel injectors. Again, all this is from a TRD rep, not myself. Please respond to whether this sounds believable or just BS.

[kaosv1]

Well mated to the (in developement) 5.8 liter it makes tremendous sense.

[RLloyd]

Just what I was waiting for! I have had the TRD supercharger on my truck for just about 1-year now. I wanted to finish it off with the cold air kit from K&N but I too was told not to do it. They told me that the truck would not run correctly and that the mapping of the air reading would be effected by the tube. Does anyone else have this on there blown tundra???

[bkoneski47]

To clear that up for you, he said that the only problem with the FIPK was that sometimes K&N's oil had been being deposited on the MAF sensors wire, causing a misreading by the computer. If you don't over oil the filter and/or periodically clean the tiny wire inside the MAF with a gentle spray electrical cleaner, then you should be all set.

[Mudog715]

Originally posted by bkoneski47
To clear that up for you, he said that the only problem with the FIPK was that sometimes K&N's oil had been being deposited on the MAF sensors wire, causing a misreading by the computer. If you don't over oil the filter and/or periodically clean the tiny wire inside the MAF with a gentle spray electrical cleaner, then you should be all set.

Actually the "early" design FIPK for the Tundra had a problem with inaccurate MAF readings because of the tube diameter difference from stock. The MAF sensor doesn't read ALL of the air passing through the tube, just a small sample. Then it extrapolates that sample, ie if the sample size is 1/10 the tube size then it multiplies the sampled airflow by 10 and uses that as the total airflow value. The problem is if the tube diameter where the MAF is sampling differs from stock (or what the MAF was calibrated to), then the MAF will report incorrect readings -- ie. if the tube is LARGER and the MAF is maybe only sampling 1/11 of the total air, it's still multiplying by 10 (not 11 as it "should"). The result is less airflow reported to the ECU and the ECU commanding too lean of an air-fuel ratio as a result. The ECU will "learn" the error and attempt to compensate, however if the level of compensation (long term fuel trim) exceeds about 10% from the factory calibration, the ECU will assume either the MAF or an O2 sensor is reporting incorrect values and the Check Engine will illuminate. Even if it is under the 10% limit, tip-in enrichment will be off resulting in a bog off idle or when rapidly opening the throttle.

The "revised" FIPK tube has a little "crimp" in it directly below the MAF to reduce the pipe size to similar to the stock pipe. This keeps the MAF in calibration and prevents the problems discussed above from occurring.

[hyrlik]

Can you post the dyno numbers with and without?

I still haven't seen anyone post a dyno slip/jpeg, and I don't want to go through the 60+ pages of posts in the S/C bible looking for one...

[UCK40]

03 4.7 SUPERCHARGERS HAVE "TWO" "NINTH" INJECTORS
BY ALL THE POSTS ON THE 03 SUPERCHARGER, IT ISNT HELPING OUT TOO MUCH