Had Dyno Run And Need An Opinion

[EJD001]

Hey guys...

Had my car on the dyno yesterday, pulled 160.9 rwkw

Showed the sheet to a mate of mine and he said that the air fuel ratios are a bit out of wack.

He recons a boost controler will fix this issue and ill br able to get more power out of it

Just wanting to know what u guys think about it and what some of your recomendations would be

Car is a stock R34 GTT

Cheers mick

[crack]

looks about rght to me. stock ecu richens up as power goes up. get pfc to even out afr's and get a bit more mid to top end. keep boost to 10psi to preserve the turbo.

[MBS206]

Looks normal

A boost controller will just cause worse AFRs, but the extra air, still allows for more power.

2 ways to fix the AFR issue really, ECU change, or an adjustable fuel reg.

[R31Nismoid]

Well for a state, your mate - dont listen to him

More boost is likely more than not, to flip the ECU out and then you'll have a massive power dip around 4000-5000rpm.

What you need is a band-air interceptor (S-AFC etc) or a full ECU (PowerFC etc), thats the only way to solve that problem

[bubba]

Wow.. that's pretty rich!

[Guilt-Toy]

buy a power fc before you do anything else. Do not pass go.. do not collect $200

[The Mafia]

buy a power fc before you do anything else. Do not pass go.. do not collect $200

+1

[FineLine]

If you're going to keep your mods to around that level there really is no need to go power fc unless you want to.

A simple safc will suffice.

[Wacky Dee]

SAFC to fix the AFRs or come down to Sydney and have Toshi remap your stock ECU (you can find him on the forums here).

You're running very rich at the moment .. safe AFRs are 11.5:1 at the top end and you're at less than 10:1

I'm surprised you're making that much power with a stocker that's running so rich ... I was making around 150rwkw with a stocker + turbo back exhaust, now at 190rwkw with turbo back and boost controller at 11psi and Toshi's ecu remap.

If you're going to get a boost controller, get it before any tune so that the ecu can be tuned with the new higher boost ... otherwise you'll pay twice.

Edited July 21, 2008 by Delta Force

[Toshi]

Hi Delta Force.

EJD001

R34 can not boosted up more than around 12psi.

Because ignition timing will retard around 12psi.

Its same R33.

Also R34 boosted up under 12psi , it will ping at 3600-4400rpm when the accelerator is put down on street.

Because R34 ignition map is 3600-4400rpm very hi ignition timing for Australia fuel.(maybe 100 octane fuel is OK)

You need remap or PFC(need tune).

[EJD001]

Thanks for the replys guys...

I think im going to cash in a few weeks holidays and get a PFC.

Also forgot to mention that ts running stock boost.. havent played with it at all

[Pal]

need to get the air temp (at) and intake temp (it) a bit closer too. can throw out power level

[Bumblebee]

lol @ looks normal..

no it doesnt lol thats really really fkn rich.. a stock computer wil never flatline a dyno. thats rich as f**k, 10:1 is fkn super super rich and thats considering that it flatlines there.. who really knows how rich its running

get it tuned champ and ull enjoy more power and better fuel economy while thrashin

[EJD001]

fuel economy is not too bad... did a run from gosford to bathurst and back and used one and a bit tanks. but i got 510km before having to fill... ofcourse hghway driving is the big factor there!

So u think im better off just getting a PFC or getting the standard ecu looked at.

In the future i am going to go for larger numbers, thats y im leaning towards a PFC

Edited July 22, 2008 by EJD001

[Bumblebee]

get a powerfc

[Granthem]

My R34 made 161rwkw with a cat back exhuast and around 11psi. Once again operator said she was running very rich

I had never noticed the flat spot. Until recently, feels like a massive second kick somewhere near 6 and she starts going again! stupid factory comp. Im definitely getting the flat spot now.

Its possible the boost is running mine too rich and probably robbing some power.

Here is my graph. Because it was a simple cheap power run the print out doesnt include the afr etc.

Edited July 22, 2008 by Granthem

[EJD001]

i cant work out y im getting such good figures..

Like grant, he has upped the boost and put on a exhaust and its making the same power as my car, which i havent upped the boost or done any mods to!

Cars are so fun sometimes!

[Granthem]

Yeh dynos change from place to place.

Easiest way is to track it.

Currently my car has run a best of 14.0 and more importantly at a best of 99mph. So i guess its pretty close to 160rwkw in a chunker of a car to get that top end speed.

Throw yours on the strip and find out what she pulls. Without the boost increase, my car was running 92-93mph. If your cracking much more then that, your lucky and got a freak of an engine

[EJD001]

now looking into a PFC...

Should i be looking at a second hand one or brand new.... is there much that can go wrong with a second hand unt?

Price will be the big difference aswell i would think!

Thanks to everyone for their input so far...