Rolling Road again

[jeffw]

Back to ATspeed this morning to get the final bits done to the map 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. 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.


Very very pleased....just in time for the summer....err.....next year

[jeffw]

Quick play with a calculator give 207BHP & 182 lb ft if you use 20% losses....

[James]

Very cool! did they not tell you the crank hp ? got any printouts of the power curve ?

[jeffw]

They don't consider crank HP as they can't measure it so it is just a guess. They are going to send me the power curve, it looks almost like a turbo car with cams coming in and a big step in torque.

Given that when I bought the car it had 140BHP at the crank, 207 is pretty quick.

[James]

yup difference should be amazing!

[Ben_Copeland]

Glad its slowly creeping up ! So what you got planned next time ??

[jeffw]

To do anything else would require changing the pistons (for pocketed ones). So you would then be into

Forged Pistons & H section rods (£1100 ish)
Bigger lift cams (£500)
Gaskets, oil etc (£300)
Labour to fit and remap (£1000)

Optionally
Dry sump kit (£1100)
Engine balancing (£400)
New injectors (£200)
Replacement Exhaust (£1000)

Total around the £5600 mark !
All estimated cost figures to give 260 BHP (200-210 at the wheels) with no great increase in torque but it would go to 8000 rpm....need a new crank to go higher than that I would think.

It would certainly be cheaper to turbo or supercharge the engine but I think enough is enough. I might see if I can get a 4-2-1 Exhaust manifold done & maybe look at drysumping the engine.

[zxr400]

mine is puting the same sort of power ,but i'm going the blower route,275hp would be nice ,after bikes it still does'nt feel that fast,i said to the mapping guy it's slow so he came out with me ,f##k me how much more do you want ,car people just don't get it ,must say it does spin in 3 some times i should be happy realy ,and slow down ,that was the idea geting a car

[jeffw]

It would be interesting to get all the Zetec engined cars we have around on the same Rolling Road on the same day. That would give us an idea of what works and what makes the right power.

What have you done to get 200-210BHP out of yours ? Do you know what the peak torque figure was ?

[Rob E]

It would be interesting to get all the Zetec engined cars we have around on the same Rolling Road on the same day. That would give us an idea of what works and what makes the right power.

What have you done to get 200-210BHP out of yours ? Do you know what the peak torque figure was ?

Good idea think that would be a teller should look at who and why is the best for rolling road test maybe an open day thingy