Halltech

That is just bobledigook from K&N. If it says halltech, it is our 689 high flow. It it says K&N, that is our newest Ram Air Filter. We have since paid K&N to have the top of the mold sport or Halltech logo.

Just to clarify, we have been shipping the high flow filter for 1 year now on all orders. It does not require tuning. There is no "tuned and untuned filter". The dry filter proved no better on the dyno as far as knock retard, air fuel ratio (only .1 point richer) and actually lost 8 horsepower in our tested. They have been shelved since then. Why this is misinterpreted, is that when our prototype A units were shipped two years ago for testing, we had no idea exactly where things would settle. 3 of the 10 testers felt that they were running too lean, which prompted us to deliver the dry filter for trial. It solved the problem, but at the expense of horsepower. When we made production units, we tighten the MAF read area so that we brought a richer air fuel ratio to the Stinger-RZ for everyone that bought one, and made the high flow 689 the standard filter.

Our Z06 has gone through 2 years of testing now, with over 8800 miles of long term testing, and the air fuel ratio is right at 12.5:1. This is completely safe on the Direct Injection SC LT4. Our plug chop, after 10 dynos and right after track day with Andy Pilgrim testing, showed a chocolate brown plug insulator and greyish brown tip. We burn 93 Octane, and our HP Tuner log showed timing at the stock upper limit on our full throttle TRIC runs up to 145 mph. So much for losing timing after relearn. IATs are very close to ambient most of the time.

Another way to determine if you are running to lean, is to look at the COTP event, and the RPM where it kicks in with severe fuel enrichment. Stock vs. Halltech show that event right at the same rpm. If our setup was running too lean, the cats would overheat much sooner than stock.

We have sold over 1000 units, and absolutely no issues except worn out tires.

I am convinced that when we finally get a before and after TRIC dyno or 1/4 mile run, folks will see it's benefit.

Happy New Years, and thank you forum members for all your support!

Jim Hall

C7/Z06 Man

Jim help me out here. I have been following this pretty much from the beginning and it's been a while but I seem to remember when you went to the paper (no tune) lower flow filter that it made the same or slightly more hp than the oiled high flow filter on the dyno.

However in a later post you said that the oiled high flow made more hp.

PS: I don't "think" the TRIC will do much on the dyno unless you blow a lot of air into the duct, car really needs to be moving in the real world.

MG727

Thanks, that is helpful.

So just to confirm, all Z06 versions come with the 689 high-flow filter? The non-Z06 versions come with the K&N B0404D6 filter but they will soon say Halltech on them?? What is the flow rate for this filter?

Thanks again.

C7/Z06 Man

From what I have read the new K&N B0404D6 will/is replacing the K&N 689 filter in the Z06 and soon will have (or has) a new name on the lid.

Halltech

Yes all Z06s and LT1s come with the high flow filter and have been for over a year.

The nomenclature you are referring to is the 4" top K&N lid that is now being used on the Halltech 689 filter. It allows more surface area to the incoming airflow from the TRIC. Otherwise it is exactly the same as the 689.

We ordered 300 each, so for some time you would see K&Ns logo and lid vs. Halltech. Once the top of our mold is redone on the mill, it will have our logo. Hope this all makes sense, but ignore the B0404D6 lid mole marking.

All the dyno testing for 1.5 years and other TRIC testing has been done with the high flow filter.

Halltech

That was one dyno. They were tied on the dyno. Other testing by one of our engine builders, did a much more detailed test, and the difference was 8 rwhp between the dry and oiled K&N. K&N makes both of these for us. The drys are boxed in our upstairs storage.

Halltech

The only filter being used for all applications is our Halltech SP-3597 High Flow 689 cfm filter. The dry filter flows 589 cfm and is Redish Blood Orange.

mekz06

I am running one of the original carbon fiber units shipped. Am I safe to run the high flow filter? Would I benefit as well?

Thanks as always!

MG727

Thank you! Makes sense finally. Just wanted to be sure before I install it.

Halltech

Left is the SP-3597 Rev 1 Right is the SP-3597 <br/>Both flow 689 cfm @1.5 H2O<br/>The Rev 1 has been in use for 1 year and has slightly better surface area exposure to incoming air from the TRIC. I has a different top for that reason. Either filter will make 50+ RWHP. All dynos done recently that showed almost unbelievable numbers were done with the Rev 1 filter on the left.

Notice that both have the K&N logo. That was before we paid $1000 to have our logo on the top since we designed them.




SP-3597 left SP-3597 Rev1 right

Halltech

Yes it is safe. We put 2,000+ miles on the CF version with the high flow filter, and had Smokey's Dyno do dyno testing with the wideband O2 sensor, and HP software. 10 different dynos since then all came in with perfect reports of air fuel around 12.4 - 12.6:1 air fuel. After 4,000 rpm the COTP kicks in and the air fuel drops to around 10:1. The Cat Over Temp Protection is one of the nannies modified by tuners to keep the power going after 4,000 rpm.

Speedforhire

Which filter is this Jim?



It came in the kit I got directly from you recently (September).

Halltech

High Flow SP-3597 Rev1 689 cfm

Speedforhire

Thank you Sir.



I owe you a beer.

ACS55

Air/Fuel Ratio changes with CAI:

The Air/Fuel ratio on my original Dyno run (without halltech CAI) with stock air cleaner was a consistent 11.6-11.7 up to 5750, where it gradually richened up to 10.1 by 6200 rpm.

The Air/Fuel ratio on my (wirh halltech CAI) dyno run was a consistent 12.5-12.7 until 4800 RPM, then it gradually richened up to 11.1 by about 5750 then it held at 11.1 from 5750 and up..

So basically, the HT CAI leans the car out approximately one full point on the A/R Ratio. AFR in the low 10's is a power killer.
Halltech CAI on stock tune
Stock air cleaner on stock tune

Higgs Boson

AFR in the low 11s is also a power killer. ;-)

Bob U

Big improvement for sure!

Z0Sick6

what was the temperature outside. a lot of talk is that in optimal weather 40 to say 65 the oem is good enough to get max power. people in summer or in hot climates when temps are say 75 to 100+ benefit with the CAI... as it allows it to get lost power back due to heats oak, timing , kr, etc.

Higgs Boson

one could make even more power without an intake at all. even the "high flow" filter is restrictive at the end of the day.

if it wasn't for the pesky MAF, one could just remove the whole intake assembly for dyno (and drag strip) use and really put some power down.

but since we have to drive on the street with filtration and the E92 ECM won't allow the Z06 to boost with a MAF code present, we can't run Speed Density and the presently offered intakes flow more than the stock setup, it's the best we can do at the moment.

Mopar Jimmy

Something that should be so simple seems to just continue to be so complicated.