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"SVT-similar" 2.0 Zetec tuning

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#21 ·
I don't think you're reading that graph correctly. You can only compare to the RPM range stock was wound out to ... anything above that point is simply gains from math, HP=TQ*RPM/5252.

Now they did gain over stock up top, but what's to say that is only from the manifold?
Would it not be correct to assume that changes in ignition timing may also warrant gains up top? (answer: Yes).

I think it was on the other site TS had claimed to make tons of power with their manifold and that people needed their manifold to make power. Unfortunately I made very near the same power on a stock SVT manifold, was a few WTQ difference which could easily be attributed to dyno error/calibration. Which to me means any claims they make are geared more towards advertising and not fact.

But that's not to say it isn't a good manifold and something people should think about. I'm just saying don't claim everyone will make the same gains from a simple bolt on part. The combination is what made the power and can not be broke down into singular parts.


The other thing I will say, being I've run both the SVT and now the FRIM, having a plenum does seem to help top end power. My educated guess is that it serves as a buffer to slow standing waves and improves the actual tuned length of the manifold ... vs the stock manifold that have no plenum and standing waves escape and don't compound intake air speeds.
 
#22 ·
BigRed03 said:
And the comment about a bolton zetec beating an svt is mostly due to the superior/shorter gearing for drag racing the zetec 5 speed has. the svt is geared for road/autox racing.
Click to expand...


Posted via FF Mobile Which I agree with, this is why the battle between the SVT and 2005-2007 ST continues. Even though the svt has more power, the ST has more tq, not to mention a 5 speed. Id like to add Im having a hard time finding any Zetec svt header kits out there. Doesnt seem like anyone has them for sale anymore, which is unfortunate because the mod bug has bit again. Also itll be hard for anyone with earlier foci to grab an efficient header that you can also use a cat with. So if one wanted to go this route, youll have to grab a used svt header, add a egr bung and get the rest of the exhaust pieces. Not a huge deal, but oh it was so nice when they sold the modified header kit with the RT high flow cat and larger flex pipe. The good old days.


OP...how much money you wantto spend again? Maybe hed be better off grabbing an ST or 05 focus, mileage would be alittle better anyhow.
 
#23 ·
Yes I think we can all agree... Going to the duratec is a better choice. More efficient, better design, still in production, responds better to performance parts, etc.

Matt
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#26 ·
drostedrummer89 said:
People look for y2k manifolds because they are cheap and oem. This manifold cost $500+. I'm not saying you're not an informed member, but look in topspeeds link above, they started with 108 whp and ended with 123 whp.

An automatic focus doesnt need to be "beefed up" for bolt ons. With a tune he would be fine.

And yes, the svt is a much nicer car. The leather is gorgeous, the car is clean and understated, comes with great power over the stock form, and better all around performance. The OP requested what he could do in a daily commuter zetec sedan. Which is alot less money than an svt.

Bigred, I mentioned this in my previous post.

this is my bolt on focus against my friend's bolt on svt focus. With even 10 more HP from a manifold, I would have been neck and neck, if not pulling ahead of him.


MattPosted via FF Mobile
Click to expand...
Yes, looks exactly like times in my red zx3 before I got the SVT. It had SRI, HFC, flex and flex back exhaust.

Off the line: mtx-75 is superior

Down the road: SVT's top end takes over.

But this is really comparing apples to oranges due to the different power curves of the car and their intended purposes. I LOVED the mid range tq and power of my zx3, where the SVT starts really building power at 3k rpms. The mid range power really helps the zx3s get going and why they can keep pace.



DrkKnight614 said:
Posted via FF Mobile Which I agree with, this is why the battle between the SVT and 2005-2007 ST continues. Even though the svt has more power, the ST has more tq, not to mention a 5 speed. Id like to add Im having a hard time finding any Zetec svt header kits out there. Doesnt seem like anyone has them for sale anymore, which is unfortunate because the mod bug has bit again. Also itll be hard for anyone with earlier foci to grab an efficient header that you can also use a cat with. So if one wanted to go this route, youll have to grab a used svt header, add a egr bung and get the rest of the exhaust pieces. Not a huge deal, but oh it was so nice when they sold the modified header kit with the RT high flow cat and larger flex pipe. The good old days.


OP...how much money you wantto spend again? Maybe hed be better off grabbing an ST or 05 focus, mileage would be alittle better anyhow.
Click to expand...
Don't the STs have a taller final gear vs the zetec mtx-75?

Both the dtec and zetec vs SVT battles will rage. Both boil down to power curves and gearing.
 
#27 · (Edited)
Dear OP,

Keep the car stock, and SAVE YOUR MONEY...

Go to school and build your credit, then once you have stable income buy something you can go faster in.

I wish I did that when I got my first Ford, you'll save a lot more money and less speeding tickets. Don't get "sucked in" trying to go faster, unless it's going to be a track only car.

I know this might not be the answer you want, but I wish someone told me this.
 
#31 ·
A couple of things to bear in mind choosing between a ZX4 and an SVT...

1) The standard Zetec, with a few bolt-ons, makes good torque and gets off the line pretty quick. With decent tires, you can get off the line quicker than an SVT can.

2) A bog-standard ZX3 (no power-windows, locks, etc) weighs around 200 lbs less than an SVT. The sedans weigh a bit more than that, but still weigh less than an SVT ZX5 would. Power-to-weight ratio is far more important than raw power. Also, because of the lower curb weight, it has more potential to be quick through the corners.

Personally, I would go for a ZX5 over a ZX4... simply because you have the versatility of a hatchback and the extra rear leg room the ZX4 would provide. I just don't see as much usefulness in a ZX4.
 
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