Back to ATspeed this morning to get the final bits done to the map on the Omex and play with the cam timing.

State of play from the last session was 122 lb ft & 150 BHP at the wheels. I have since discovered that the throttle wasn't open completely when the pedal was on the stop....since corrected that.

So we played with the inlet timing, added some more fueling and then played with the exhaust cam. Final figures where....

146 lb ft & 165.2 BHP at the wheels (20% losses gives 206.5BHP & 182.5 lb ft). The car has gained over 20 lb ft all the way from 3000 to 6500 rpm. It is a complete missile now in comparison, I'm amazed the difference a few hours on the rollers has made. Still not the figures that where promised the supplier of the cams and heads but it is a really quick car now. Very pleased, we even had time to fit the new geared Hi-Torque starter motor. I now have to watch how much throttle I put on coming out of 2 & 3rd gear corners otherwise the R888s start to get a bit sidewise.

Given that I had 140 BHP when I bought the car it has come a long way Looks like the exhaust headers is holding back the peak HP figure a little but even so very pleased.

That sounds superb. I guess I'll have to push the braking points to the max now!

adrian

It's pretty quick now Adrian....might even get close to your BEC

quote:

---

Originally posted by jeffw
I have since discovered that the throttle wasn't open completely when the pedal was on the stop....

---

I think you miss-understand. The pedal was hitting the stop before the ITBs where fully open so there was a little bit of throttle left. The car used to run MS with the same throttle setup ...don't see why you would see it in MS or Omex as the throttle didn't go to the max.

quote:

---

Originally posted by jeffw
I think you miss-understand. The pedal was hitting the stop before the ITBs where fully open so there was a little bit of throttle left. The car used to run MS with the same throttle setup ...don't see why you would see it in MS or Omex as the throttle didn't go to the max.

---

the thing i love about Atspeed is that there are no bullsh*t bhp figures to flatter your ego.

they will tune it for everything it can do and what ever they say it is, is really what it is.

manufacturers of heads cams etc will always claim silly gains because it sells.

atspeed have nothing to gain and their policy of if its not better to drive at the end of the day on the rollers its free tells you everything to need to know about their approach to tuning engines.

Have to agree regarding ATspeed. Great guys and, as you say, it is what it is. Having said that they where surprised with the improvements we made yesterday moving the cams around especially in the mid-range.

great results, what cams/headwork have you had done? does the engine make smooth power or is it a little 'cammy'?

You must be over the moon

i can guarantee that it will be very well delivered throughout the range if they approached the setup anything like they did on my car.

The car has a brand new blacktop Zetec with a "CNC Heads" port/polished/large valve head and their cams (which are somewhere between fast road and Rally cams). The claim was that the engine would make 235-245BHP but we have not been able to make those figures.

The car is quiet smooth but pulls like a turboed car from 3000rpm when the cams come in. 183 lb ft is a lot for a NA Zetec and certainly the engine feels very strong.

To get the extra HP that the original vendor claims it would make would almost certainly require pocket pistons and different (higher lift) cams.

quote:

---

Originally posted by jeffw
To get the extra HP that the original vendor claims it would make would almost certainly require pocket pistons and different (higher lift) cams.

---

why did you move from megasquirt (and which one did you have?)

What have you gained by going omex?

I had a Megasquirt MS1 V3. The reason was pretty simple. I wanted a commercial product which did what I wanted without having to solder bits on the board and was supported by tuners generally. I went with Omex as that was what ATspeed use and recommend. The car seems much smoother with the Omex and I have a greater confidence with the whole setup (had the loom fitted at the same time).

I'm sure you could do the same thing with a Megasquirt but I'm also sure it would take a lot longer and not be quite as good. At the end of the day I wanted a quick car without having to learn the complexities of ECU tuning to do it.

quote:

---

...or a recalibration of the RR You can always make a few extra horses that way.
You did remember to add 25bhp to the figures before posting, didn't you?

---