Thank you. 26.7 @ 8000 rpm is awesome. Thank you for this data.

Load will always drop

 

yes it would, if we could get them and sell them anymore. We are working with some people to try and get them made again...

So with all this airbox talk. I had totally forgot about an experiment a local did with his airbox. With great results.







On 91 oct, with a UNMODDED 100% stock factory box with K&N drop-in filter I tuned the car to 312WHP/298WTQ @24.4PSI

With the above MODDED factory box, the car with the above tune did 312WHP/308WTQ @ 25.6PSI. Notice the higher boost because the mod freed up the restriction. This also made it hit error correction before peak hp and dropped boost.

Now, after I retuned it for the modded airbox:

322WHP/310WTQ @ 25.4PSI

I was able to run 1psi more peak because of the modded box, the evo was happier overall, much less knock prone.

I would need to look back on my logs to see the Baro differences.

 

Very interesting but kinda hard to see exactly what was done. Did you guys attach a second filter on the wall of the airbox?

 

Yup, a second K&N filter from a snowmobile (I think?) to the wall that faces the ACD res. Like a poor mans ARC box.

before with the stock box, WGDC was 100% up top. With the modded box it gained 1.5psi up top

 

jamie we should get together and try to design something. I really want to figure out a good solution to this.

 

This looks like a winner. It might perhaps help to run some ducting from the bumper area up to the box.

 

Sounds good to me I've never even logged baro before so now I gotta do some pulls and see how my intake is actually performing. So the closer to 100 the better I've gathered.

 

Not to get off topic too much but I tested my baro this morning and just cruising it rests at around 97kpa and during a WOT 3rd gear pull it was 96.5kpa at the beginning and dropped to 93.1kpa @ 7500 rpm. NOt sure if this means I have some scaling issue or I just have an air flow restriction with my filter? Outside air temp was 47*F and Atm. press. was 30.04 if that makes any difference with the baro readings.

 

Its airflow restriction. The best intake setups will only have a few point drop at high airflow rates.

 

Last question and I'll put this to rest...so it will read 100% at least during cruise with a less restrictive intake filter setup? I'd imagine that 93.1kpa is fairly bad??

Also, does it use the MAP sensor readings because I have my ZT2 map sensor installed and I know the readings are slightly off currently until MrFred has time to finesse that whole deal. I wasn't sure if this was strictly MAF signal or if the MAP signal is used also. And I have scaled my MAF before...too much info is better than having not enough

 

Here is Baro from a GST open filter with hacked OEM airbox @ 27.8 psi

103 baro to 99 at 7700



Reads 103 Baro at cruise

 

I have a BR open filter and at 3000 rpm WOT I read 99.53 and at 7000 it is 96.53. Idle is 99.96.

 

So would a scaled maf effect the baro readings or is it a totally seperate sensor? I assume it is since it has its own table in ECUFlash. Just dont want to chase ghosts.

 

just curious are you running the stock FMIC?

 

Its a separate sensor in the MAF. Basically, its just another pressure sensor that meaures air pressure in the MAF tunnel.