CrazyIS

No Idea what an OBDII is so I probably don't know of anyone with one.

HKS350

iTrader: (4)

I agree.. Has the ECU been completely reset yet. I'd like to see it reset then drive another 300 miles, check A/F ratios then.

Gernby

iTrader: (1)

I totally disagree on the reset ECU. Fully settled fuel trims and timing curves after several hundred miles are WAY more significant than reset / default values.

carchitect

iTrader: (1)

The OEM Lexus scantool communicates exceptionally fast especially if only a few parameters are selected. It can datalog the engine's data list information for several minutes. I don't think aftermarket can do so. Most OEM manufacturers use multiple communication protocals on the OBD-II port. Lexus uses their own and a lot of systems in the vehicle can be communicated with and in some cases different selections can be made. There isn't any support from the aftermarket currently and I seriously doubt they would ever come close to figuring even one of them out.

I might be able to install these headers in someone who is dying to try them out (Combfilter) and post some of the results before and after. I know I can datalog the MAF meter's input, injector duration and A/F output with speed and rpms and plot a graph. The installation of the headers if it nets a gain would be apparent with increased MAF signal and injector duration. The manifolds simply won't make any gains unless there is more air moving thru the engine.

combfilter

iTrader: (3)

hehe If I was dying to have them, I would have already bought a set.

I have a lot of faith that mazzuri makes a good product and the price is reasonable. Just want to see more data come in regarding is350's with these. I would also have to go to a much more quiet exhaust such as stock. My borla is already loud enough.

Lextasy89

thats what im gonna do.. install the headers and then remove my magnaflow mufflers and put back on the stock ones..

Gernby

iTrader: (1)

My OBDII datalogger isn't anything special, but it does a fine job capturing the parameters that matter.

Joe Z

iTrader: (10)

What 1/4 mile track are you planning to go to in So Cal??

So far i am free the 1st Sunday of April and i am dying to do some runs with my car with some before and after exhaust mods..

Joe Z

yummy

i will be going to Sac raceway dragstrip for the CMI event

Joe Z

iTrader: (10)

Damn.. 400 miles away....

CrazyIS

From what I understand Pomona is open on Thursdays. I need to get the details, but I am thinking of going sometime in April, to pull my time.

lobuxracer

iTrader: (2)

Guys - ET means nothing in terms of horsepower. Trap speed is everything. Ignore the times, focus on trap speed. If you run faster, you made more power, if you don't, you didn't. You also need to correct for density altitude if you want to compare runs from different days. You can get accurate weather info for Sac Raceway from here if you click on Mather Field (KMHR) including historical data with hour by hour observations so you can calculate density altitude pretty accurately.

GB Packfan

So we're screwed in Cali, correct? Yet, I'm tempted to get them, even it meant taking them off every two years for smog.

Kurtz

iTrader: (1)

You're screwed in any state that does a visual emissions inspection (which is a lot of em).... You might can find an exhaust shop to make some generic cats fit the mazzuri headers though and that would get you past visual in most states if the inspection place doesn't know what to look for (which is a lot of them who just check for the right number of cats)

In CA however that still won't work as the headers won't have an EO number, so swapping before inspection would be the only choice.

I don't think CA requires inspection for the first 4 years or something on a new car so you'd be ok for a little while anyway.

ba-b4

When you buy a new car in CA your first smog check is in 7 years I think. By that time I think I'm ready to move onto something else.