HOW-TO: SVT IMRC DSI Intake Manifold Upgrade FOR ZETEC!!!!

[homegrown2nr]

Originally posted by ..:: sleestak ::..
Nice mod focituner! Sounds like a bit o' work and funds, but I am sure you are appreciating the DSI more and more as time goes on.


Homegrown, the major difference you are probably going to see is that your car will pull steadily to redline, whereas before you start to loose that pull but your rpms are still climbing. Thats where the runners in the dual stage intake come into play. Its optimizing your air current to better suit the rpm range you are in.

Stock on SVT tune, the runners switched over around 6500 or so, with Waynes tune and probably others, it will switch over at 5k. You can even hear the difference in the engine tone when it switches over. Its nice having that extra oomph up high, believe me.

My problem now is low end. My car pulls plenty hard to redline. anywhere past 3000 and rushes all the way to the top. (might be my cams). So that's why I wanted the 00' mani mostly for lowend , but for some top end as well. Money is also an issue. $180 for a ported 00' is a good price, but if this swap costs $500 and only gets me 1-2HP up top then there isn't a good enough justification for the extra $320. I looked at some dynos someone had posted and it didn't look like a substantial difference.

[sc0tty8]

Originally posted by ..:: sleestak ::..

Stock on SVT tune, the runners switched over around 6500 or so, with Waynes tune and probably others, it will switch over at 5k. You can even hear the difference in the engine tone when it switches over. Its nice having that extra oomph up high, believe me.

I think this is some confusion, the DSI with this swap to a regular zetec is controlled by the MSD digital RPM switch, not by a tune.

Originally posted by homegrown2nr
My problem now is low end. My car pulls plenty hard to redline. anywhere past 3000 and rushes all the way to the top. (might be my cams). So that's why I wanted the 00' mani mostly for lowend , but for some top end as well. Money is also an issue. $180 for a ported 00' is a good price, but if this swap costs $500 and only gets me 1-2HP up top then there isn't a good enough justification for the extra $320. I looked at some dynos someone had posted and it didn't look like a substantial difference.

I have a set of crane cams installed(0012's, equiv to FR#2's pretty much ) in my car and I can't wait to get my intake in my car. If you look at the dynos of a stock manifold car, you see at 5300rpm there is a decline in power. With the svt, it will make power to at least 7000rpm. If your not getting enough low end, maybe you should retard your cam timing 4 degrees? It will suffer on the high end but will bring your power band down a few rpm. I sorta like where my power band is now, the crower #1's are pretty close to the FR #2's, and, the cams I got, are very close to them. You can tell in my car when the 2k power band starts, I really like how they improved the mid range, they really make the focus more fun to drive.

And, I am not sure on the forced induction you plan to go with, but, I am thinking, since I have the SVT intake, I will prob go vortech, I am already buying up some parts to make a new motor, I am going to go for a 10.5:1 compression and *hopefully* add a vortech to it to help out with the high end. I may also add in spray or, do it on the current motor until I get the SC, not sure at this time.

[focituner]

Update: The ported TB is Fricken Awesome, Makes the ride that much better.

[ztecpower]

focituner....
I wanted to do my install this weekend on my SVT intake manifold, But I'm missing the SVT IAC, some people say I NEED the SVT IAC do I ?? Or can I use the stock one ?

Troy.

[focituner]

You can get one shipped directly from SVT Salvage, I believe Dan has a few around.

I never tried the stock iac, So I would not know. I would suggest having it available because I don't want you to do all the work and be stuck because of the iac. Especially if it is your daily.

[y2kpedo]

this is really cool

[_Celldweller]

i've been told that if you go forced induction, you'll want to stay away from the SVT intake mani because it is 2 separate pieces of plastic. The 2K mani is better if you plan to go f/i

would also like pics of the placement of the MSD unit and how you mounted it there and whatnot. go into detail on that part. nice write up BTW you beat me to it.

[Peregrine]

Nice write up! Even though I haven't thought about doing this swap anytime soon, I did definitely learn something!!

[focituner]

Thnx man. It is a unique mod which has many purposes, Clean running throttle, (no egr), Steady power band, A little engine dress up, a definite change in performance. I enjoy it very much.

[Greg01]

focituner, how does the new throttle body compare vs. the focus central one and how much was it???