hey guys

i got a dyno run done today (on my 20's so im very embarresed about the power) to fine tune a few things cause my last run was done quickly.

My peak torque is now 4950 and peak power at 5500. Peak torque is a lot higher than it used to be, but its stronger all the way through the rev range and mid range acceleration is awsome.

having the 2 power readings so close together, is this a good or a bad thing? performance wise of course

hey guys

i got a dyno run done today (on my 20's so im very embarresed about the power) to fine tune a few things cause my last run was done quickly.

My peak torque is now 4950 and peak power at 5500. Peak torque is a lot higher than it used to be, but its stronger all the way through the rev range and mid range acceleration is awsome.

having the 2 power readings so close together, is this a good or a bad thing? performance wise of courseGeneral rule of thumb

Torque is needed to help you gain speed faster. KW is needed to achieve a higher speed.

So yes the 2 close together is good. If they are peatering out around the same time then thats a pretty good tune.

For me, once i get my car tuned ill be going for a very high torque curve rather than end game kw's.

So what Kilowatts were you achieving?... surely not that embarrassing.

Where peak torque appears isn't as important as the shape of the torque curve. If your peak torque has moved up to 4900rpm but in doing so has left a big hole down low then that's bad, but if you've got a good, strong, and fairly flat torque curve that just happens to peak at 4900rpm it's neither here nor there.

Remember that power depends on torque at a given engine speed, so high torque at high rpm = lotsa power. Likewise, low torque at low rpm = crap drivability. flat torque at every rpm = great car. That's why the XR6T is so damn good.

Howdy J
Did that RPW intake manifold make difference at all? Your mid range xtra grunt might be resulting from that, eh?

Howdy J
Did that RPW intake manifold make difference at all? Your mid range xtra grunt might be resulting from that, eh?
yeah it made a huge difference midrange, just have to touch the throttle and at about 3,000rpm it starts to take off hard.

the torque cuve is very smooth, and it doesnt loose much either side of peak torque so pretty stoked the way it feels.

13 second 1/4 mile pass?? we'll see in 13 days!

Hmmm - sounds good. Wonder how would it work on my 3.0. It already has good power surge at ~3000 RPM, so if I could improve the grunt below that would be yammy.


yeah it made a huge difference midrange, just have to touch the throttle and at about 3,000rpm it starts to take off hard.

the torque cuve is very smooth, and it doesnt loose much either side of peak torque so pretty stoked the way it feels.

13 second 1/4 mile pass?? we'll see in 13 days!

Ok i'll tell you my power results-kinda weird compared to my last run but done on different days and this time with my 20's

I got 145kw at 5450RPM which is bugger all, but feels no different top end.

BUT

the dyno sheet states i now have 570Nm of torque at 4950RPM which is about 50Nm than before and 900rpm higher than before.

The car pulls better than ever and with some good compound tyres for my 16 inch rims, 13's should happen :cool:

The car pulls better than ever and with some good compound tyres for my 16 inch rims, 13's should happen :cool:
Bring it on! :badgrin:

Any chance of a look at your dyno graph? I'm interested in comparing the shape of the curve to my own graph.. while I've got twin throttles, I actually don't have a larger plenum, so I'm interested to see how much fatter your power curve is at low rpm.

ive got the sheet but no scanner.

i'll try and do it at work early next week.

Do your 20's have a different rolling diameter to your other wheels, as that would explain your torque increase on a rolling dyno

Do your 20's have a different rolling diameter to your other wheels, as that would explain your torque increase on a rolling dyno
I would say yes.

But lets hope you get in the 13's Jason and at mm05 to boot!

570Nm of torque, holy toledo, is that real???

570Nm of torque, holy toledo, is that real???
yeah dude its legit. i was suprised as well but u can feel it!!! Thats on my 20's as well so when i get my 16's on there with the smaller and correct diametre on there, it should haul even more arse!

570Nm of torque, holy toledo, is that real???
measured at the wheels, yeah.. and the ratio to estimate power at the flywheel based on power at the wheels doesn't apply to torque.