240hp? Is This Right?

[Musky]

Hey guys,

I just got my R33 back from my tuner this arvo after he fitted up a 'Slide' highflow and Power FC. And to my dissapointment the car only made 240hp... I have all the supporting mods, exhaust, FMIC, 040 fuel pump, adj. cam gears, elec boost control etc.

TO be honest it doesnt even feel as though ive gained any more power than what i had before it went in. The only difference is that the car is a bit smoother to drive.

Its running around 15psi at the moment because i have stock bov and it started leaking at 16psi.

He recommended upgrade bov, fuel reg, injectors and up the boost to around 18psi. Correct?

Is this roughly the power i should expect from my mods or is something wrong there?

Cheers

[R33GOD]

dude thats crap ( no offence) but 240 rwhp is like 180 rwk. at 15 pound on that turbo you should be expecting atleast 220 rwk which is like 300rwhp.

i think your injectors are letting you down.....but in another case i made 209rwk on 13 psi with the same setup as you.

maybe your bov is leaking more than you suspect, if not call slide

hope u get it all sorted

Edited October 31, 2007 by R33GOD

[Sambo33]

sounds wrong to me mate. thats about 178kw. my 33 made that with just a FMIC, exhaust and 10psi boost on the stock turbo.

next i fitted the pfc and 040 and got 201kw.

now ive got a hiflow, fuel reg and z32 afm and my tuner is confident he will get about 240kw out of it.

[R33GOD]

what are your a/f ratios?

[Musky]

what are your a/f ratios?

Not sure?

I was given a printout from the Dyno run but that was it.

I didnt think it was right. Id had a long day and it was like 6pm when i picked the car up so didnt even think to question what he'd told me. Me thinks i should give him a call tomorrow...

[nsm034]

yeah z32 and injectors. i got 242rwhp with zorst, fmic, bov, boost controller and before power fc, fuel pump, z32. got them on after then ran 205rwkw on bout 10 psi.

[govich]

The power is absolutely horrible past 5500rpm, and your boost level trails off to 13psi. I don't know why a workshop would let a customer take a car out like that.

You need upgraded injectors and AFM. Stock fuel pressure regulator is fine.

Edited October 31, 2007 by govich

[shnaped_second]

yeah z32 and injectors. i got 242rwhp with zorst, fmic, bov, boost controller and before power fc, fuel pump, z32. got them on after then ran 205rwkw on bout 10 psi.

The power is absolutely horrible past 5500rpm, and your boost level trails off to 13psi. I don't know why a workshop would let a customer take a car out like that.

You need upgraded injectors and AFM. Stock fuel pressure regulator is fine.

I can see this was done on matty sprys dyno and his is known to read from 15rwkw less than "other" dyno's, anyone can make it read 200kw but he doesnt, and he also is just a full time tuner not a designated fitting workshop

[govich]

I can see this was done on matty sprys dyno and his is known to read from 15rwkw less than "other" dyno's, anyone can make it read 200kw but he doesnt, and he also is just a full time tuner not a designated fitting workshop

That wasn't my point, i mean the shape of the graph not the peak number. It should be a smooth curve peaking at way higher rpm. I certainly hope that's not his best effort as a full time tuner..

Edited October 31, 2007 by govich

[R33GOD]

if he fixes the leak in his stock bov the curve would also be smoother. i think its an air fuel problem. perhaps get another rb25 afm and see if it helps. get a printout of your a/f ratios. if its too rich as one of my dyno's were in the past it wont make much power.

if he cant find the problem take it to another tuner

[shnaped_second]

That wasn't my point, i mean the shape of the graph not the peak number. It should be a smooth curve peaking at way higher rpm. I certainly hope that's not his best effort as a full time tuner..

It cant peak at higher rpm, with the boost dropping off at higher rpm, dont pass the blame to the tuner as he can only do what the car can produce...

[R33GOD]

It cant peak at higher rpm, with the boost dropping off at higher rpm, dont pass the blame to the tuner as he can only do what the car can produce...

yes but even at 13 pound it surely has to make 200rwk with a slide hiflow

[SECURITY]

you would've maxed out your AFM, theres nothing your tuner could have done about that. i noticed my AFM maxing out at 14psi but with the emanage i can clamp my AFM voltages, you dont have that option with the PFC. get a z32 afm and see how you go.

also ask your tuner what your base timing was.

[R31Nismoid]

You can tune past the AFM limit, so i dont see that as a problem, seen it done many many times by decent tuners.

Poses no real issue either.

So... poor top end you have there unfortunately, and also some boost control issues.

So its a few things here

The tune could be shit. I dont care "whos" dyno it is or that it "reads lower" than others.

The graph does not lie and there is a clear issue at the top end. Any tuner that lets a car least a workshop like that should be appalled to be honest.

I would be asking the question of what's going on in the top end. It doesn't look boost related as the drop-off is reasonably smooth from 15.5-12psi, so the power curve should just taper off, not move around like a Richter scale in an earthquake

1. Better boost control/exhaust will help keep the boost flat @ 15psi like it should sit.

2. Ask the tuner what is going on in the top end and why it was left like that.

3. Post back with the reasons/suggestions from them and we'll see what the deal is.

Cheers.

[R33GOD]

You can tune past the AFM limit, so i dont see that as a problem, seen it done many many times by decent tuners.

Poses no real issue either.

So... poor top end you have there unfortunately, and also some boost control issues.

So its a few things here

Cheers.

surely most boost controllers can hold 15 pound? i had the same problem a while ago, i changed my standard actuator to a hks one. much better

[R31Nismoid]

Totally depends on the controller, application, installation etc.

By better boost control, i mean just that.

-A re-config of the EBC

-refitting possibly

-new EBC (could be damgaged)

-adjusting actuators etc etc.

Better boost control didnt just mean purchase a new EBC dude, there are many factors and it covers anything that relates really.

Its not just a case of its "just not working", there is usually a reason(s) why it wont work as designed