Rb25det Running Crazy Rich

[NA_Goodness]

Hey guys, went to an SAUWA Dyno Day today, and the dyno print out showed some interesting results. The A/F ratio dived down below 10:1 and sat on the bottom of the graph for he magority of the run. The owner of the workshop had a look at it and reckons something is seriously wrong with it. Would explain the fuel usage recently. Any ideas what might be causing it? I would take it back to the workshop, but I dont trust them touching my car. No offence to them.

The car is a 1996 R33 GTSt with high flow turbo, full exhaust, intercooler, remapped ECU, stock BOV, Spitfire coil packs, 18psi through a Greddy Profec B Spec II.

Any ideas?

Rhys

[SECURITY]

check timing @ the CAS as well as your o2 sensor on the dump pipe. make sure its still connected - if it is replace it. also check for vacuum/air leaks in your piping.

[Pal]

Hey Ryhs,

I had the same problem where due to the heat today at the dyno (38degree day) my power fc chucked a whole heap of fuel in to stop it pinging and i ended up 60hp less than normal and afrs in the 10's instead of the normal 12's

[NA_Goodness]

Checked the CAS after I did the timing belt. I'll check the O2 sensor and leaks tomorrow.

[NA_Goodness]

Hmmm. So you reckon getting it checked on another dyno when its cooler? Like I said before, I'd buy a car and parts off Alistair, but I wouldnt trust him with my car. Possible he's trying to scam money off new customers?

[Traitor7]

Hmmm. So you reckon getting it checked on another dyno when its cooler? Like I said before, I'd buy a car and parts off Alistair, but I wouldnt trust him with my car. Possible he's trying to scam money off new customers?

Take it to another workshop to get it dyno'd that you do trust and see if the readings are the same?

Do it on a day without so much heat..

[Pal]

yeh, let the weather cool down a bit then chuck it on another dyno and check it then

[R32 Driver]

Hey Rhys,

My mate went to the same dyno day and he pulled a low 300 when it normally pulls 400hp

his was tuned by autoworx so i dont think its the dyno reading low, his AFR also dropped down into 10s

[NA_Goodness]

Yeah, everyone was getting stupidly low readings due to the heat. Wasnt really too bothered with that, more interested in the A/F ratio. I'll go to OvaBoost when its a bit cooler and have a run there. Cheers guys.