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Old 08-24-2012, 08:14 AM   #87011
egman2005
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Orp and tune. done....... Maybe throttle body.
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Old 08-24-2012, 08:17 AM   #87012
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Originally Posted by DarwinSays View Post
Disagree all you like. There's method to my madness:

-It will save him the step of having to flash a second time if he upgrades these parts anyway later.
-TB will help with launch bog
-SRI replaces the restrictive stock SVT snorkel and airbox.
-Tom suggests having the wideband MAF for his tune.

As a set of parts that can all be changed at the same time for the same price as the tune, it's a great first step as long as the surging isnt driving him crazy so far and plans to continue upgrading the car. If he has the $400 now, then he can get toms with his tax return. ~.^

If you're only ever going to do one thing to the car - Tom's tune. Hands down.
I'll agree that the TB does help with throttle control and makes it seem more responsive. I did enjoy that on my car too.

the SRI absolutely flows worse than the stock box/snorkle. there are dyno graphs that show/prove the car loses power when switching from a stock box to SRI even with a tune.

it does sound louder and its only a couple hp loss so if you prefer the noise of the SRI then go for it...

but if max power is what you want keep the stock intake and spend the money on something else that will actually gain power...like a HFC or ORP.
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Old 08-24-2012, 08:19 AM   #87013
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Okay so you guys seem pretty knowledgable about these cars, and me being new to the scene, I've got a few questions. When I'm holding the rpms steady in 1 thru third, usually in the lower end, I can feel an oscillation in the speed. Any clues as to what's causing this?
This is what we refer to when we say 'surging'.
Shitty tune for short.
Bad fuel-air mapping, as well as vvt and imrc factors. Its a little bit of everything.
Toms tune to fix.
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Old 08-24-2012, 08:22 AM   #87014
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Thats the first i'd heard of the SRI causing loss of power. Now in those cases, was the wideband sensor installed, or reg one simply removed?
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Old 08-24-2012, 08:24 AM   #87015
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also fixed

an ORP and a Tune at the 2 single greatest power adders for the money on an SVT the tb may improve feel a little, and the intake/exhaust really only change the sound of the car.
This.

Oscar Jackson did some dynos comparing intakes on the svt. The stock intake with a paper filter matched or outperformed everything, including the Volant. He didn't have a k&n on hand to test a drop in panel filter.

He had a whole Page on his website talking about the comparisons like 7 or 8 years ago.
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Old 08-24-2012, 08:25 AM   #87016
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I agree on the tune and ORP, but I would never buy Tom's tune. FSWERKS is the way to go in regards to tuning.
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Old 08-24-2012, 08:26 AM   #87017
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My guess is a sniffer was shoved in the tail pipe. More accurate than any wideband.

Also a wideband is useless unless calibrated and you are pushing the limits. Its just a light show for most people.
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Old 08-24-2012, 08:27 AM   #87018
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The stock SVT Airbox/Snorkel and the SVT Header at the best zetec intake/header combo. A lot of regular zetec guys will swap the svt intake/snorkel and the header onto their cars.

when I had mine i made the mistake of adding an SRI onto my SVT before I did the research. But since i daily'd the car I rather enjoyed the sound of the intake combined with the exhaust I put on it so i didn't' care. Also never did get a tune either which I'm sure would have been a good idea but w/e at this point.

I'm pretty sure unless you went full legit filter in the fender CAI the stock is the best way to go
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Old 08-24-2012, 08:30 AM   #87019
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Stock header is not the best, but very close, the jba/jba knock offs do provide gains, but you really need to have a full bolt on car or more to notice it.
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Old 08-24-2012, 08:31 AM   #87020
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Top Speed was able to get a bit more peak HP from a header too I believe, but they sacrificed more down low, which would suck on a DD.
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