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Old 06-04-2010, 09:19 AM   #21
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Not to be thread jacking, but does the Zetec have extra cylinder oil squirters like the SVT?
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Old 06-04-2010, 01:27 PM   #22
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No, The Zetec does not have the oil squirters like the SVT but there not needed

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Old 06-04-2010, 02:34 PM   #23
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I am sure you are happy with it , Take a Zetec 12.1 with the same mods you have and you will have the same HP # as you have now with weeks less work , money , headachs

Tha Zetec makes 130
The SVT makes 170

Thats a 40HP diff , 15 of that came from the header that been proven over and over again so that leaves 25HP , 10 came from the compression that leaves 15 , 5 came from the larger air box/snorkel , MAF and TB , That leaves 10hp , I feel an easy 5 of that came from the cams alone which leaves 5 HP

I have allways said that a good combination working and tuned properly makes for slightly more HP , I am taking that last 5 HP and giving that mostly to a good working combination and the head

I am very conservitive in my numbers above that I gave each part as you can see it leaves little performance coming from the head alone

I have allways said the SVT heads exh side is the same as the Zetec head , the intake side is very nice and flows well BUT it doesnt do much good on the intake side if the exh side cannot get enough out to let more in

Tom

So none came from tuning differences? Good to know
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Old 06-04-2010, 04:07 PM   #24
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In my opinion no , None of the added performance came from the Intake manifold or any changes there is between the tunes

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Old 06-04-2010, 04:08 PM   #25
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John please don't take that as "you don't need a tune"

Tom you do know hes running all this stuff on the stock tune right? I still dont understand how the pistons arent completely swiss cheesed

What is that injector and maf setup you ended up with?
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Old 06-04-2010, 04:34 PM   #26
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Im not sure which "John" your talking about or which car

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Old 06-04-2010, 04:37 PM   #27
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John = iminhell, this car with the 12:1 compression SVT head on zetec engine running stock tune on a "matched" maf/injector
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Old 06-04-2010, 05:42 PM   #28
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I think he knows that would need a full custom tune if nothing more then for the raised compression

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Old 06-04-2010, 05:49 PM   #29
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ProM tuned for 19# injectors. I'm running the PZEV 24# injectors though. ECU is run of the NB output of the PLX WBO2.
Cruise and any closed loop I'm very near Stoich, varies maybe half an AFR.
WOT is where my problems lie. I'll run down to about 11:1 AFR up to about 5,500RPM then lean out some to redline. I've never gone Stoich or lean though, even on a full tank of Ethanol. With the 19#'ers I would go lean on Ethanol top end.
So my injectors can handle the task but I could really use a tune. Honestly though the car doesn't feel bad for what it is. Doesn't chug or miss a beat at all. I'm sure I could pull another 20hp if not more with a good tune. Best estimate I can figure now is I'm around the 160whp mark, TQ should be up pretty close it feels like, don't have to shift to pass much at all.

The other thing is I've played with enough spark plugs to of found one that works well with the setup. It's about 2 heat ranges colder than stock. Loose a bit of my idle quality but seems to gain top end more than the Mot coppers do.

I really really want the seats recut for the plugs though so I can run a gasketed plug. Sooo many more options.

With the SVT MAFS I run even richer and it's odd how big of a difference that minuscule 1mm makes. Closed loop it still the same though.
Just odd how much the stock ecu can compensate for I think. really says something about the adaptability of the programming.
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Old 06-05-2010, 10:29 AM   #30
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Why go to a gasketed seat ? Why do you need more plug options ?

What plug are you running that is 2 colder then stock and how are you basing its 2 colder?

Tom
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