mazzuri super headers
I'm near Kendall... right next to Florida International University.
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Joined: May 2006
Posts: 336
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From: fl
dude carlos im down to slap the headers on man lemme know .... ill test em out and do all the dynos and **** like that hit me ... im right around the corner from you ill have Herbie at KAW install it for me ...
do you have the headers? i though you had a custom exhaust with no secondary cats? if so, you wouldnt really need me for anything lol.
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Joined: Jun 2007
Posts: 2,827
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From: DXB / AD
RWD exhaust manifold:
R 17140-31120
L 17150-31120
There are separate part listings for the AWD exhaust manifolds, but my manual shows the 2.5 and 3.5L engines use the same headers. In fact, they only pieces in the entire exhaust system that are different between the 250 and 350 are the center exhaust pipe (which has the last two cats) and the rear exhaust pipe.
Javier
R 17140-31120
L 17150-31120
There are separate part listings for the AWD exhaust manifolds, but my manual shows the 2.5 and 3.5L engines use the same headers. In fact, they only pieces in the entire exhaust system that are different between the 250 and 350 are the center exhaust pipe (which has the last two cats) and the rear exhaust pipe.
Javier
Mazzuri: I know you knew that but What happens if u put the headers u made for the 250 on the 350? logically speaking shouldnt u get similar gains on the 350 since they the OEM headers are the same?? just a thought
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Joined: May 2006
Posts: 336
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From: fl
hahah i was under the impression that you had the headers lol .... yea i have custom exhaust wth no secondary cats .... i would be willing aswell to have some send me the hearders and install and dyno ... so lemme know fellas
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Joined: Apr 2008
Posts: 78
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From: Florida
Yes I am willing to put your exhast onto my car for dyno purposes. I know of a shop here in Naples that will do it. When I was first thinking of having someone install the headers I spoke to a gentalmen about it, the first thing he told me was that the headers would require some tunning of the air fuel ratio. He also said he could do it with out any CEL and without hacking the ECU. This maybe the best route we can take with the Mazzuri headers.
Yes I am willing to put your exhast onto my car for dyno purposes. I know of a shop here in Naples that will do it. When I was first thinking of having someone install the headers I spoke to a gentalmen about it, the first thing he told me was that the headers would require some tunning of the air fuel ratio. He also said he could do it with out any CEL and without hacking the ECU. This maybe the best route we can take with the Mazzuri headers.
I am free this weekend. PM me and lets set something up.
The more I look at the AFR plot, the more I think that even if the plot is accurate, I still don't think it would be the problem. In my experience with tuning my S2000 and IS350 with my custom piggy-back, high 13's:1 produces more power than 12.X with 93 octane.
Driver
Joined: Oct 2006
Posts: 159
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From: CA
There's no way that this 350 was "running out of fuel". At his altitude, the stock injectors would be totally capable of delivering much more fuel than needed. I think that there has to be something wrong with the dyno's WBO2 or the car's primary O2's. The results are also being taken from behind the secondary cats, which will skew the readings a bit.
Bottom line is, the car didn't lose any power anywhere in the power band. Gained some good power down low where it counts and over all I am happy. One has to look at the whole dyno and not just the last 500 rpm.
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Joined: Apr 2008
Posts: 78
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From: Florida
Bottom line is, the car didn't lose any power anywhere in the power band. Gained some good power down low where it counts and over all I am happy. One has to look at the whole dyno and not just the last 500 rpm.
I meant it needs some more fuel, as in with an SAFC or something like that.
Bottom line is, the car didn't lose any power anywhere in the power band. Gained some good power down low where it counts and over all I am happy. One has to look at the whole dyno and not just the last 500 rpm.
Bottom line is, the car didn't lose any power anywhere in the power band. Gained some good power down low where it counts and over all I am happy. One has to look at the whole dyno and not just the last 500 rpm.
Rookie
Joined: Apr 2008
Posts: 78
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From: Florida
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..?
Driver
Joined: Oct 2006
Posts: 159
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From: CA
Driver
Joined: Oct 2006
Posts: 159
Likes: 0
From: CA
True, however the results are a little less then spectacular; don't you agree? I do however think the car feels stronger. But, there is still the potential for more power here. We need to find a way to pull out more power from the headers. Daniel would it be possible to tweak the o2 sim to some how lean out the fuel ratio? Forgive me if that is a stupied question.
. The car should feel stronger as you have a good amount of more torque.It's not a dumb question. The sim uses different wires, something can be made, but ideally an SAFC or something like that would need to be used 1st to see what it can do.
Is there anyone in CA with a 350 that mazzuri can borrow if he does determine that a redesign is needed? I imagine this would help out in the process.