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Rent Asunder!
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11,806 Posts
Discussion Starter #104
It's been over a year since I updated this.

I finally got the car to the dyno again.

2.0L stock bottom end
Cosworth intake manifold
Ported 2.3L head
Crane "stage 1" 212/204 cams
GT28RS @ 11.5-12psi

284whp / 229wtq

 

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Bo Baustin
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13,134 Posts
Damn dude thats pretty sweet. I didn't read the whole thread, have you hit the track with the most recent setup?
 

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Rent Asunder!
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11,806 Posts
Discussion Starter #110
Damn dude thats pretty sweet. I didn't read the whole thread, have you hit the track with the most recent setup?
I did last year but it didn't go so hot. I had clutch and spark issues. I'm hoping to get back to the track regularly this year.

---------- Post added at 03:03 PM ---------- Previous post was at 02:57 PM ----------

Here's a few updated pics I took over the weekend.











 

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Rent Asunder!
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11,806 Posts
Discussion Starter #113
Tomorrow I'll be installing new cams with adjustable cam gears to conduct a little experiment.

Current Cams (the ones used for the dyno above)

212/204 dur. @ .050"
.374"/.354" lift
110 LSA installed at 110/110

New cams going in tomorrow

236/228 dur. @ .050"
.414"/.389" lift
114 LSA installed at 112/116

These new cams should give it a bit of a radical idle and hopefully stretch that powerband out where I'm wanting it to go. I'm hoping to hit over 300whp with these cams without increasing tq very much, if at all.
 

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Rent Asunder!
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Discussion Starter #114
New cams are in and they're actually not what's listed above. I made a last minute change. Idle is nice and it smooths out about 1500rpm so it still drives smooth.

 

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595 Posts
A lot of people underestimate what a stock SVT Focus can do. They did only have 170bhp which is far below it's competition on the market (SRT-4, Cobalt SS, etc...) but the suspension is solid and will outhandle both the SS and SRT4 in any way you pit them.
I know this is an old comment in an older thread but I've been reading it as it's been enjoyable to see the progress on the car... catching up on what I have since missed since last viewing the thread...


just want to add that while the svt focus only came with 170bhp... the internals are literally good for 300-330whp

Definitely an incredible bang for the buck car!

---------- Post added at 10:02 AM ---------- Previous post was at 09:35 AM ----------

Love this picture! The cosworth IM was something I really really wanted to do to my ST!

That 2.3 Duratec had gobs of torque down low but needed to breathe up top! That's where that intake manifold would have really shined for that car!

I'm thinking of one day picking up another st or an svt focus as a second driver.
 

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Nice build!
I hate this was bumped though, I miss my old giant pumpkin svt focus. I told the guy who bought it if he ever wants to get rid of her I will buy it back.
 

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Rent Asunder!
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Discussion Starter #117
I've seen 360whp with a stock bottom end SVT Focus and a GT3076R. They are stout motors for sure.

I finally got around to messing with the cam timing a couple weeks ago. I advanced the intake cam by 2 degrees and then 4 degrees and then retarded it the same. I did the same with the exhaust cam. I then advanced and retarded them both together 2* at a time and here's the conclusion I've come to. It seems to like it best where I've got it now with the intake cam straight up and the exhaust cam advanced 4 degrees. It seems to have the smoothest idle there plus pulls harder in higher rpm. Off boost response has improved as well. It really seems to be responding to that well. Adjusting the intake cam had very little affect on anything. The exhaust cam has been responding just the opposite. This seems to further prove the old turbo cam timing saying of "Adjust it so that the exhaust is happy. The intake is just along for the ride."

I also tested cranking pressure with the intake cam adjusted. At 4 degrees advanced, it was 178-182psi across the board. At 4 degrees retarded, it was 170-174 across the board. Not a very big difference at all and probably why it doesn't make a big difference on response and performance. With the exhaust cam retarded 4 degrees, I got a rougher idle, really poor response off boost, lots of turbo lag, and it felt like it was falling on it's face above 6k rpm. It was just the opposite at 4 degrees advanced. The idle smoothed out quite a bit, the exhaust note was deeper, response was much better, the turbo seemed to spool up sooner, and the higher I revved it, the harder it seemed to pull.

Here's a break down of the adjustments made and it's results. These cams are 228/228 @ .050", .390"/.390" lift, straight up is 108 ICL / 116 ECL with 4* overlap at .050" lift. The motor is 122ci 4 banger, 10:1 compression, with a FRPP head that flows 275 @ .400" intake and 245 @ .400" exhaust.

0/0 (112 LSA @ 108/116, 4* overlap @ .050")
Moderately lopey idle, decent driving characteristics on and off boost, and fair response. This was the base.

+4/0 (110 LSA @ 104/116, 8* overlap @ .050")
Moderately lopey idle, slightly better response off boost with weaker response and power on boost.

-4/0 (114 LSA @ 112/116, 0* overlap @ .050")
Moderately lopey idle, slightly worse response off boost with better response and power on boost.

0/+4 (114 LSA @ 108/120, 0* overlap @ .050")
Mild lopey idle, off boost and on boost response both significantly improved, deeper exhaust note, definitely more power.

0/-4 (110 LSA @ 108/112, 8* overlap @ .050")
Rough choppy idle, very unresponsive cruising around and WOT, turbo was laggy, seemed to fall on it's face in higher rpm.

+4/+4 (112 LSA @ 104/120, 4* overlap @ .050")
Moderately lopey idle, good off boost response with meh power on boost, seemed to have a little more torque down low

-4/-4 (112 LSA @ 112/112, 4* overlap @ .050")
Complete and total ****! Horrible idle and hates life in general.

So I ended up moving the cams back to 0/+4 where it seemed to run the best. I'm liking it there. The results kinda shocked me. I expected it run worse with more overlap and run better with less overlap regardless of the valve events themselves but that definitely isn't the case cause it ran better with 8 degrees of overlap and 104/116 events than it did with 4 degrees of overlap and 112/112 events. Depending on what you were going for, you could argue that it ran better than 0 degrees of overlap and 112/116 events. This has been fun to mess around with and I see myself messing around with it some more. I didn't go beyond 4 degrees for this test. I may advance the exhaust cam a little more to 6 or even 8 degrees advanced to see if it improves even more. I'm curious as to how that might result.
 

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Good to see your still working on the focus. I remember thinking this was a really cool project when you started the thread. There is a turbo svt focus near me and I think that thing would be fun as hell, but he wants 8k. I don't wanna pay that lol.
 

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Rent Asunder!
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Discussion Starter #119
Yep, I'm still messing with it but not as much as I used to. I've gotten more into the off-roading scene lately.
 
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