Post your dyno graphs here!

Post by **etking** » Mon Jul 02, 2007 10:29 pm

o yeh i wanna see that video

Panda_ET · Post by **Panda_ET** » Mon Jul 02, 2007 11:34 pm

ok its posted in the 'POST YOUR N12 VIDEO HERE' in off topic

OORRR if ur lazy here it is lol

raddavey · Post by **raddavey** » Tue Jul 03, 2007 9:00 am

Before you go looking at changing things to increase the top end power i would look at flattening out the AFR's to around 11:5:1 and get the ignition timing tuned. No doubt the rich AFR's and most likely constant timing values as the revs rise isn't helping the top end power.

Do you have your cam specs? I've been meaning to check mine is dialed in correctly as well. You do have a heap more low end torque than me thats for sure.

Post by **shanec86** » Tue Jul 03, 2007 11:35 am

Max Power: 162.4kw @ 6550rpm
Max Torque: 588.8nm @ 4870rpm

(RPM was converted from roller speed so the graph is out)

SammyET · Post by **SammyET** » Tue Jul 03, 2007 1:52 pm

i dont know too well how this works.. but i'm pretty sure the kw figure is derived from torque and RPM.. so wouldnt it also be wrong if the RPM is??

raddavey · Post by **raddavey** » Tue Jul 03, 2007 5:43 pm

no because the dyno use's the tractive torque at the rollers and the speed of the rollers to get the HP, that's why usually the dyno graphs show speed not the engine rpm (this has to be setup individually)

Damo · Post by **Damo** » Tue Jul 03, 2007 9:12 pm

Panda_ET wrote:ok its posted in the 'POST YOUR N12 VIDEO HERE' in off topic

OORRR if ur lazy here it is lol

Thanks Panda, your a top bloke.

Damo

Rohan 84ET · Post by **Rohan 84ET** » Tue Jul 03, 2007 9:18 pm

so Damo, 0-200kmph time??? haha, i am sure you must have a rough idea, as your car has no trouble hitting that speed what so ever.

Damo · Post by **Damo** » Tue Jul 03, 2007 10:29 pm

raddavey wrote:Before you go looking at changing things to increase the top end power i would look at flattening out the AFR's to around 11:5:1 and get the ignition timing tuned. No doubt the rich AFR's and most likely constant timing values as the revs rise isn't helping the top end power.

Do you have your cam specs? I've been meaning to check mine is dialed in correctly as well. You do have a heap more low end torque than me thats for sure.

What I will actualy do would be to take a look at a data log in 4th, then from that, mod the ignition timing toward max power and beyond, and see how much that pulls back my AFR's. Then, I will take out fuel till I have 12:1 (I wouldn't bother going richer than this, as my charge temp doesn't go more than 10deg above ambiant whilst driving, and the injectors are spraying right onto the back of the valves).
Problem is that the O2 sensor is a normal 1v job, but it seems quite consistant with what the dyno dynamics wide band was showing.

Cam specs:
cam lift duration duration @ 50 valve lift
intake 289 298 236 0.4528
exhaust 283 272 218 0.44

timing advance timing @ 50
open close open close
intake 41 77 10 46
exhaust 68 24 41 -3

over lap over lap
65 7

inlet max lift 108 ATDC exhuast max lift 112 BTDC

110 deg lobe centres

Damo

Timmzy · Post by **Timmzy** » Tue Jul 03, 2007 11:39 pm

Hi Damo,

That is quite an agressive camshaft, do you have problems achieving good vacuum at idle?

Darren

Post by **shanec86** » Wed Jul 04, 2007 12:03 am

My camshaft profile isnt too far off, actually exhaust is quite similar

Cam specs:
cam lift duration duration @ 50 valve lift
intake 283 272 218 0.4421
exhaust 283 272 218 0.44

timing advance timing @ 50
open close open close
intake 66 26 39 -1
exhaust 26 66 -1 39

over lap over lap
52 -2

110 deg lobe centres

Damo · Post by **Damo** » Thu Jul 05, 2007 9:04 pm

Timmzy wrote:Hi Damo,

That is quite an agressive camshaft, do you have problems achieving good vacuum at idle?

Darren

Sort of depends on waht you consider good vacuum. With the stock cam, was happy around 17-18 inhg. With the big cam it will sit at around 12-13 inhg when warm. I can't quite get it to idle straight up from cold, but I don't have a idle air moter plumbed in.
Mind you, Canberra is at 600mtrs above sea level, so you could probably add 1 to 2 inches to that.

Damo

Panda_ET · Post by **Panda_ET** » Thu Jul 05, 2007 10:05 pm

no probs mate happy to help if you want more posted send them on so dont lose the email addy

raddavey · Post by **raddavey** » Tue Apr 15, 2008 11:01 pm

Damo · Post by **Damo** » Wed Apr 16, 2008 9:47 pm

Now thats cool!

178kw on 19psi, top shit right there. Mine made similar with an extra 5 odd psi.

Need to wind in another 5 psi and crack the 200watts.

Nice work Rdavey.

Damo