mazzuri super headers
Pole Position
Joined: May 2007
Posts: 241
Likes: 0
From: CO
Are there any other 250 owners out there that have dyno'ed their cars?
I am still planning on putting my 350 on a dyno. I have just been way too busy to get around to it. But after seeing Mondays results, I want a second opinion, and soon. Unless anyone thinks I should just wait untill a solution is found. But wheres the fun in that..?
I am still planning on putting my 350 on a dyno. I have just been way too busy to get around to it. But after seeing Mondays results, I want a second opinion, and soon. Unless anyone thinks I should just wait untill a solution is found. But wheres the fun in that..?
Rookie
Joined: Apr 2008
Posts: 78
Likes: 0
From: Florida
No I did not get a base line dyno. But the mods I have are pretty generic. So we would have to base my car off of someone elses dyno, and keep in mind that the alltitude, air density and temperatures will be different. The only real concrete data we will get is the A/F ratio.
No I did not get a base line dyno. But the mods I have are pretty generic. So we would have to base my car off of someone elses dyno, and keep in mind that the alltitude, air density and temperatures will be different. The only real concrete data we will get is the A/F ratio.
Last edited by Gernby; Apr 23, 2008 at 04:49 PM.
Rookie
Joined: Apr 2008
Posts: 78
Likes: 0
From: Florida
At least we'll be able to see what an aftermarket exhaust that eliminates the secondary cats will do.
If Daniel is cosidering redesigning his headers, my dyno might be helpful in his new calculations... If he is going to redesign them we should wait untill I have the new set.
Daniel, thanks for sending us 350 guys a new set (if you change the design). That is good buisness from your side. If another dyno will help you, just let me know.
Driver
Joined: Oct 2006
Posts: 159
Likes: 0
From: CA
True, you and I are going to swap my stock exhast for your custom exhast, for dyno purposes. I found another shop for that today. Promblem is it will cost $150, I think thats a bit steep. The other shop I have found will only charge us $100, but his dyno is broken and will not be fixed for a few weeks.
If Daniel is cosidering redesigning his headers, my dyno might be helpful in his new calculations... If he is going to redesign them we should wait untill I have the new set.
Daniel, thanks for sending us 350 guys a new set (if you change the design). That is good buisness from your side. If another dyno will help you, just let me know.
If Daniel is cosidering redesigning his headers, my dyno might be helpful in his new calculations... If he is going to redesign them we should wait untill I have the new set.
Daniel, thanks for sending us 350 guys a new set (if you change the design). That is good buisness from your side. If another dyno will help you, just let me know.
I have an idea on what needs to change, but it will requier a new ypipe all the way to the stock exhaust. The good news is I can make it all on my car, as everything is the same for the 350 and than have someone do a before and after dyno with it that has a 350. So as soon as I have some free time I'll get started on it.
Lexus Test Driver
Joined: Sep 2007
Posts: 1,097
Likes: 0
From: Dallas
No problem. Another dyno won't really show much more than what has been shown.
I have an idea on what needs to change, but it will requier a new ypipe all the way to the stock exhaust. The good news is I can make it all on my car, as everything is the same for the 350 and than have someone do a before and after dyno with it that has a 350. So as soon as I have some free time I'll get started on it.
I have an idea on what needs to change, but it will requier a new ypipe all the way to the stock exhaust. The good news is I can make it all on my car, as everything is the same for the 350 and than have someone do a before and after dyno with it that has a 350. So as soon as I have some free time I'll get started on it.
honestly i dont see how the y pipe design ur thinking of has anything to do with power that should be gained from the headers.. doin anything after the headers.. ur just gaining power from using a different exhaust.. which those of us who have a catback exhaust.. already have that gain..
Lexus Champion
Joined: Apr 2007
Posts: 3,718
Likes: 0
From: NJ
i'm pretty sure mazzuri knows wth he's talking about so we'll leave him be.
As we all know, the power he's made on the IS 250 with the headers were with the stock exhaust.
I'm pretty sure the different y pipe would lead to better flow or something.
As we all know, the power he's made on the IS 250 with the headers were with the stock exhaust.
I'm pretty sure the different y pipe would lead to better flow or something.
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Driver
Joined: Mar 2004
Posts: 175
Likes: 1
From: International
No problem. Another dyno won't really show much more than what has been shown.
I have an idea on what needs to change, but it will requier a new ypipe all the way to the stock exhaust. The good news is I can make it all on my car, as everything is the same for the 350 and than have someone do a before and after dyno with it that has a 350. So as soon as I have some free time I'll get started on it.
I have an idea on what needs to change, but it will requier a new ypipe all the way to the stock exhaust. The good news is I can make it all on my car, as everything is the same for the 350 and than have someone do a before and after dyno with it that has a 350. So as soon as I have some free time I'll get started on it.
hey guys
I dont write often but i have an idea that might work. I live in the Domininca republic and we have the distribution rights for toyota and lexus. I have a race car and know some people that have highr HP street cars.
here is the idea. hope this helps in the fuel issues with the 350. I have a friend that has a supra 2jz jspec as you know have smaller injectors than the us spec. anyway before the new injectors came in turned up boost and the car was lean, so what he did to rich it out was that he installed a NOS kit but without the NOS, so it was a single fogger that only sprayed fuel. he went to the dyno and tryed out different nozzles until he got the disired air fuel ratio.. I belive this could work until anybody can get those damn ecu cracked and the only bad that can come from this is that it doesnt work so. This is just me trying to help in the conversation and giving ideas. Hope someone can try this out. With out the car being lean the ecu should adjust the ignition back to normal and hopefully see some real gains up top and not just down in the rev line..
any thoghts..
anajri,
Wet N2O systems use a simple solenoid that is either on or off. It would provide the same amount of fuel regardless of throttle position or RPM. Basically, it would run extremely rich down low, then slowly lean out as RPMs rise. The ECU would also detect it immediately, and throw a ton of DTCs.
That said, I still feel strongly that fuel was not the problem, and wouldn't invest any effort at all on fuel tuning until I knew what was going on with ignition timing.
Wet N2O systems use a simple solenoid that is either on or off. It would provide the same amount of fuel regardless of throttle position or RPM. Basically, it would run extremely rich down low, then slowly lean out as RPMs rise. The ECU would also detect it immediately, and throw a ton of DTCs.
That said, I still feel strongly that fuel was not the problem, and wouldn't invest any effort at all on fuel tuning until I knew what was going on with ignition timing.
Driver
Joined: Oct 2006
Posts: 159
Likes: 0
From: CA
would it be possible to make whatever ur gonna do work with my x pipe?
honestly i dont see how the y pipe design ur thinking of has anything to do with power that should be gained from the headers.. doin anything after the headers.. ur just gaining power from using a different exhaust.. which those of us who have a catback exhaust.. already have that gain..
honestly i dont see how the y pipe design ur thinking of has anything to do with power that should be gained from the headers.. doin anything after the headers.. ur just gaining power from using a different exhaust.. which those of us who have a catback exhaust.. already have that gain..
Driver
Joined: Nov 2007
Posts: 162
Likes: 0
From: Florida
The ypipe will have to be new, not because I am looking for power in the there, but because I said it from day one, the headers need to end around where the second o2 sensors are, the way they are now is too short and not ideal. So If i make the headers a lot longer, the stock ypipe will not work and will have to be new. I was trying to avoide this, to keep the cost and work load down, but it seems like it needs to be done.
