Dyno power run
Turbo Mini Forums

Finally got car to a rolling road for power run , not had fueling set up is lean mid rpm thort id share.
Was surprised standard cam cam kept going to 6200 rpm

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what boost phil and any mods ?

10 psi,gt1752,matty manifold n down pipe
Mini play exhaust, ported head 35mm inlets ss valves, paddle clutch plate 20% updated pressure plate that's just holding,apart from that it's spi cooper.

Impressive

Is the torque dropping off at 5500rpm down to the standard cam?dose anyone know how strong the pistons are in the spi coopers, cheers.

How are you doing fuel and ignition? Do you have an intercooler?

I'd guess that's all you'all get out of the standard cam. You could check the cam timing and test it with a couple degrees advance, but I doubt there's much more to be had.

Standard pistons used by quite a few people. I'll be running new SPI ones (21963). Not sure exactly which standard pistons, but Nick used these for years, then broke the ring lands when pushed to 200 bananas. Not sure what power he had originally, but judging by the vids I've seen, it was a lot.

Printout shows the transmission losses to be really good. I always thought they were normally higher?

Edited by PhilR on 26th Aug, 2015.

Did they measure the hp at flywheel and wheels or just apply a notional 14 percent loss?? I too thought the losses would be higher?

I am interested as i thought only engine dynos measured at the fly and RR at wheels?

normally on a RR the do a run down test, which kinda measures transmission loss, and then subtract it to get a flywheel figure.

Fueling hiff 44 mg inlet rebuilt carb with medium spring, green I think it was , standard needle, got escort turbo intercooler on too

With a standard cam it dies off after about 5500-5600. Needs not to go past that point really, i had the same cutoff point in my old 1275, after that you felt the power massively tail off.

thanks joe