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biggestloser

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Discussion starter · #1 · (Edited)
I'll start off with my list of modifications. Ported cylinder head, crower stage II cans, JB a full length header, 10 1/2 to one compression, 65 mm throttle body with Iceman intake and all the bolts on.

With all these mods are pulled to the DYno and we did a run from 2500 to 6500 RPM. Here's the big numbers car cranked out an amazing jaw-dropping 109 horsepower and 124 pound feet of torque.

We did ten dyno pulls adjusting the exhaust cam first. Which end up maxing my teeth on the exhaust cam at 10° . Do make a note of it, that the exhaust side was max. By the time all was done I was plus 10 exhaust,minus 3° on the intake side. The final numbers were 144 hp and 146 foot pounds of torque. Amazing gains with the Dyno tune. Easily the best money spent on this whole ordeal.


It's almost impossible to describe the difference in the way this car drives mile in from two days ago. I've been studying and doing some research and it leads me to believe that there is a lot more left in this car as it sits. I'll get into that later but one of the things that you'd all should know is that the car gained 50 front wheel horsepower after the tires at 6500 RPMs. amazing. ALSO, the car never stopped making hp...curve goes up and its only stopped by the cut-off

Something that I saw that interest me was my peak torque I am reaching my peak torque at 4000 RPMs and it stays pretty flat from there on. It does start fall off a bit around's 6000 RPMs but it never completely drops off. I thought the zetec manifolds should peak its torque around 44 to 4500 RPMs. If this is true then that means I should be able to dial the cams in a bit to move that torque curve a bit higher. If I could just move the curve to the right 300 RPMs the results would be pretty amazing. 500 would be a dream come true.

I feel that at this point the intake manifold is holding me back. The car wants to read but I hit my limiter around 6500. Well I should say I haven't read the past 6500 at this point.

The interesting thing is that I hit my peak horsepower at 5800 RPMs and it goes tabletop flat until 6500 ends bikes just a bit higher when I let off at 6500 .

Personally, I've never seen a car that peaks horsepower for almost 1000 RPMs that didn't have a restriction in the system somewhere. When I look at the overall combination. The only thing stock on this car is the intake manifold. I think 150 will horsepower would be possible with a different intake manifold on this car. Maybe even adjusting the gears a bit will give me 150 fwhp but it's got to be there.

What do you guys think is next, just how much power and torque should a stock 2000 manifold support,? I'm really thinking about SVT focus manifold at this point. I'm very happy with the combination as it sits, but as I mentioned earlier I think there's more in it. When I asked you to note the fact that I maxed out the exhaust cams, I think I should set the cam gear back to zero as they sit on the exh cam and tune some more.

I just feel that either the cams can be tuned more to move the power band or the intake manifold is nearing its max cfm. Maybe neither maybe both who knows but that peak torque coming on So low leads me to believe that there is more in the combination. But again as it sits I am very happy. Any suggestion guys, or questions? Let me know thanks
 
Nice numbers, mlbbaseball made 164 whp on crower 2's and a ported head, with supporting mods. Maybe talk to him to see what he did different? Who ported the head? What intake do you have? 2.5" exhaust? Whats your afr during the pull?

EDIT: didn't know he had a zx2, not sure if TS manifold even fits.

Matt
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u have the early 2000 IM? is it port matched? thats the one we all switch to.
 
u have the early 2000 IM? is it port matched? thats the one we all switch to.
This. Your dyno looks like it is from an engine being strangled for flow, just as you said. The manifold is the answer, IMO. Seat of the pants, it gives ≈500 more usable RPM on the top end.
 
good point and...ouch

over 5600 rpms, the afr is 13.9 to 14.1...ouch. maybe this accounts for the flat line in horsepower
I would punch a tuner in the mouth if they set my car that lean.... theres no reason for it being that lean at all.
 
This. Your dyno looks like it is from an engine being strangled for flow, just as you said. The manifold is the answer, IMO. Seat of the pants, it gives ≈500 more usable RPM on the top end.
You realize that the dyno compairs a bone stock car to one with an intake AND a tune and it still only sees 10 more whp.... the tune could do that by itself.......
 
You realize that the dyno compares a bone stock car to one with an intake AND a tune and it still only sees 10 more whp.... the tune could do that by itself.......
Well its 15whp and you can clearly see the stock powerband tapering off at 6k where the manifold it is still making loads of power. TS would have to be more specific on exactly how stock it was, and how aggressive they tuned it. Just imagine the gains with an intake, cams, port work, and full exhaust.

To the OP, that seems lean to me! I would have the limiter removed and rev it to 7500 and see what the numbers are then. Also, this is 93 octane right?

Matt


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If you made max TQ with the ex. cam full advance ... you're cam timing is off. Go back through the procedure and set the cams per Crower's specs, you'll need a degree wheel to do this.
From there if you advance or retard the cam gears it's probably due to manifold spec's/restrictions.
Right now I want to say that if you'd back the ex cam off 3* you'd move your TQ up ~500 or so rpm to where you want.

Flat HP ...
Something is wrong there if that's really what you're seeing. Might be maxing out the injectors. If your on stock injectors this is probably the case. (but IIRC you're not on stock)

I'd say there's still more power there. Just a bit more tuning and you'll find it.


... and TS's manifold ... no comment.
 
If you made max TQ with the ex. cam full advance ... you're cam timing is off. Go back through the procedure and set the cams per Crower's specs, you'll need a degree wheel to do this.
From there if you advance or retard the cam gears it's probably due to manifold spec's/restrictions.
Right now I want to say that if you'd back the ex cam off 3* you'd move your TQ up ~500 or so rpm to where you want.

Flat HP ...
Something is wrong there if that's really what you're seeing. Might be maxing out the injectors. If your on stock injectors this is probably the case. (but IIRC you're not on stock)

I'd say there's still more power there. Just a bit more tuning and you'll find it.


... and TS's manifold ... no comment.


Exactly what I was thinking on the cam timing and the tune. Fix that first then worry about the flatness. Cam timing makes such a huge difference on these motors IMO, I can't stress that enough. Stock cams or aftermarket. Oh and congrats on the numbers.


I also have one question though, which is better the ZX2 manifold or the 00' manifold? I have both sitting in my garage and the bottom of the plenum is different it looks bigger on the ZX2's than the 00's and the runners look like they are a hair longer than the 00's. Just curious if anyone knew since we are talking about intakes here.
 
yeah im running 24 injectors....and i agree i do think the cams were off...
Is your MAF tuned to them? You can't just throw 24lb injectors on there with out tuning them or getting a MAF that's tuned for them. Of course this just falls under the tuning issue. I'm n/a and I never go that lean @ WOT.
 
Discussion starter · #17 ·
Is your MAF tuned to them? You can't just throw 24lb injectors on there with out tuning them or getting a MAF that's tuned for them. Of course this just falls under the tuning issue. I'm n/a and I never go that lean @ WOT.
yes tom has done my tuning. we knew that the tune would have to be redone after the cam tuning. the car was at 13.3ish afr on the first pull, before we started the cam adjustments
 
I would punch a tuner in the mouth if they set my car that lean.... theres no reason for it being that lean at all.
yes tom has done my tuning. we knew that the tune would have to be redone after the cam tuning. the car was at 13.3ish afr on the first pull, before we started the cam adjustments

This made me LOL. [neener]


Also did not realize it was dyno'd on Tom's dyno ... I hate looking as speed and not RPM ... I can't figure out, quickly, what gear you where in, could be 3rd or could be 4th. Glad Tom got the ignition clamp on properly so you could get a clean graph, LOL (first dyno).
 
Where can i find the graph? Is there a vid?

Matt
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