mazzuri super headers
Rookie
Joined: Jun 2007
Posts: 96
Likes: 0
From: California
No Idea what an OBDII is so I probably don't know of anyone with one.
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.
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.
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.
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.
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.
Lexus Test Driver
Joined: Sep 2007
Posts: 1,097
Likes: 0
From: Dallas
thats what im gonna do.. install the headers and then remove my magnaflow mufflers and put back on the stock ones..
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.
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.
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.
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.
Lexus Fanatic
iTrader: (10)
Joined: Nov 2004
Posts: 13,441
Likes: 1,083
From: Under an IS F since 2008
sorry no dyno dont have the extra money but i will be going to the dragstrip first sunday of april before with just the k&n intake i was able to run 13.57 so now i have tanabe exhaust and mazzuri headers i will post what times i hit after i go to the track to see if it actually made a difference
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
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Verdad Gallardo
Driver School Candidate
Joined: Aug 2006
Posts: 31
Likes: 0
From: California
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.
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.
