My car on Dyno

[Driver]

Hi,

I got my car put on the dyno the other day and i got about 97kw with only a cat back exhuast but using standard unleaded petrol.

Is that bad or should i be getting more?

Here is the sheet below..

http://members.iinet.net.au/~drath/kw.jpg

Brendan

[nismoman18]

thats about right, dont expect more with optimax or nething, that wont make much difference at all! get it dynods with the pod filter tho! maybe even take the exhaust off see how it goes hmm they didnt put u into 3rd gear ? strange, i think it wouldve made abit more power than that if they took it about 140 kph

[Sledge]

Not bad! typical factory intake and exhaust though. That's whats producing the trail off in your torque curve. Fix that up and you'd find another 2o+kW. See here how a bit more torque can sweeten the deal up. Looks like hes running it in second too. Not a bad thing but the high the gear the lower the power figure can look, so don't be surprised if another dyno run in another gear gives different figures.

[Driver]

Ive fixed up the intake - which i can notice the difference now..

What do you suggest I do about the exhaust??

[Sledge]

I hand made mine, but you can get good ones made by the shops. I'm just running a 2 1/2" mandrel bent mild steel system with a resonator and a high flow hot-dog style mufler. A system like that shouldn't cost you more than about $250ish. Then with a set of extractors you'd definetly smooth the torwue curve out. Bigger numbers will then come once you start tweaking the cam timing and fuel map. Don't think for a second the factory fuel map is perfect!

[Driver]

I already have a 2 1/2"cat back exhuast put on - not mandrel tho..

[Sledge]

Gee's and the curve still like that well something is restricting it.I guess the only thing left is extractors. Then you'll have to look at the head/ports and valves. Have you run a 1/4 in her yet?

[Driver]

My exhaust is loud - it has 2 resinators also..

Ive never takn it for a 1/4 yet

My car has been running like crap for 1/2 a yr so i never botherd.

I took it too a new mechanic a few days ago and he fixed the problem strait away.

[Sledge]

No offence, but loud doen't necessarily mean optimum. You can easily optimise back pressure but keep noise levels down. You can also have a really loud exhaust that does little for performance. What did he do to fit its running performance?

[Driver]

hah i knew that - just tryin to say that its probly not that great of an exhaust system

What do you mean exactly?

[Sledge]

Regarding exhaust design, head modification or your mechanics tinkering?

[Driver]

My old mechanic made one up for me, but then again he couldnt even fix my car so i dont know how good the design is really

My car used to misfire alot too - and you could aways smell petrol

The spark plug gaps where wrong and they were too loose some other stuff that needed adjusting also which i cant remember off the top of my head.

[SKYLINED]

Doh! the very 1st link doesnt work :-(

[Driver]

bah..

my fault

my webspace stuffed up

try now

[SKYLINED]

Ah thats much better!

Cheers man!

[rover]

wat gear was it done in? looks like second.

[Driver]

I was at work when it was all being done

My cars an auto.

[Sledge]

Auto. Then its second for sure.

Have you sorted out everything now?

Where's the next pile of money being spent?

[Driver]

My car is going to be passed onto a friend in a few weeks, but they still want me to do the mods to the car - with there money

It seems alot of people recommend getting extractors so im going to look into doing that

[Sledge]

Definetly a good mod on N/A cause its cheap!

Why you passing it on? Getting something better?

Got a few more weeks till my GTR lands, and trying not to spend money on my hot-rod.