drag theory... is mine correct?

[richie_stix]

Launch at peak torque and shift at peak power (bhp)?

[ASBO CAPRI]

Yes mate your right. My V8 has a 4000rpm stall converter in the gearbox which locks up on the strip near the peak tourqe point of engine and I shift at 6200rpm which is around peak hp. Had a 2800rpm converter in the box before and the car was half a second slower on the strip with slower 60ft times.

[Fiesta Steve]

Launch at peak torque and shift at peak power (bhp)?

 

I'd say yes and no.

 

Laucching at peak torque is an excellent way to get plenty of wheel spin, but then if you've got big wide sticky slicks...

 

..as for shifting at peak, you'll probably fall out of the power band on the gear change.

 

My car makes peak power at just over 7k but has loads of usable power up past 8k, if I shifted at peak I wouldn't be running 13's

[dragaddict]

Launch at peak torque and shift at peak power (bhp)?

 

I'd say yes and no.

 

Laucching at peak torque is an excellent way to get plenty of wheel spin, but then if you've got big wide sticky slicks...

 

..as for shifting at peak, you'll probably fall out of the power band on the gear change.

 

My car makes peak power at just over 7k but has loads of usable power up past 8k, if I shifted at peak I wouldn't be running 13's

 

i agree with you m8

[bmxdave]

The way i look at it is if you peak power at say 7000rpm and limit at 8000rpm and still pulling to 8000rpm then change at 8000rpm. If you change at 7000rpm you may go into the next gear at say 4500rpm but if you change at 8000rpm you might enter the next gear at 5000rpm and make more power and accelerate quicker.

 

Of course if your power severely drops off after peak power it might not work so well. But i know the big bikes change at the limiter like 2000rpm after peak power as theyre not too torquey so need revs to go faster.

 

The best way to find out is seat time and compare numbers

[vibrating_Cake]

The way i look at it is if you peak power at say 7000rpm and limit at 8000rpm and still pulling to 8000rpm then change at 8000rpm. If you change at 7000rpm you may go into the next gear at say 4500rpm but if you change at 8000rpm you might enter the next gear at 5000rpm and make more power and accelerate quicker.

 

Of course if your power severely drops off after peak power it might not work so well. But i know the big bikes change at the limiter like 2000rpm after peak power as theyre not too torquey so need revs to go faster.

 

The best way to find out is seat time and compare numbers

 

 

its a good starting point....

as said above, more seat time=faster time

[Fiesta Steve]

Go to your local rolling road and £30 should get you a power run. Everything you need to know will be on the print out.

 

Could also highlight any possible problems with your car

[H.P.E harry]

I remember my cousin andy (blue pinto'd starlet) saying that he had to short shift up the pod to get the better time