How Much Power Is Tooooo Much?

[smurf80]

Its behind the plastic shroud on the left hand side in the passenger footwell.

Chris

[DjeMz]

any bolts or clips?

i have a habit of breaking clips lol

[Adriano]

Where abouts is the ecu? Ill take and upload some pics right away..

Beside the passengers left foot

[ULOOOK]

any bolts or clips?

i have a habit of breaking clips lol

a 10mm plastic nut on the fire wall and 2 clips towards the rear of the kick panel. Pull it off towards the gear shifter.

[Ryanrb25]

my ecu still has the seal sticker on the plug of the standard ecu, does this tell me its never been touched?

[drag-on silvia]

It depends if it is a chipped r32 rb20 or 25 ecu, or a stock or chipped r33 ecu, i cant see it possibly being a stock r33 ecu. In my experience there is no such thing as a freak car, maybe 10 rwkw, but not 50, and ive done 100s of power runs in cars. If it makes that power, it does it for a reason. It appears to have the supporting hardware, now its just the injectors and management, you need to pull the cover off theecu and have a look.

yeah might pull the cover off this weekend and have a look to see if something funky has been done to it

oh, and you simply can't make 270rwkw on 10.7:1 afrs...

ok thats prolly a fair statement, any tuners on here care to have a look at the dyno graph i posted up and back that statement up?? its just that throwing a random comment out there like that dont carry much merrit unless you can back it up... now you could be right and you prolly are, but i have had it on the dyno, done the mph to back it up so if someone can come up with any sort of explanation why it could be otherwise, id really like to know?

[The Mafia]

yeah might pull the cover off this weekend and have a look to see if something funky has been done to it

ok thats prolly a fair statement, any tuners on here care to have a look at the dyno graph i posted up and back that statement up?? its just that throwing a random comment out there like that dont carry much merrit unless you can back it up... now you could be right and you prolly are, but i have had it on the dyno, done the mph to back it up so if someone can come up with any sort of explanation why it could be otherwise, id really like to know?

I'm a tuner, and a car running 10.7:1 afrs just bog down too much. It might be possible to make that sort of power with a heaps big turbo, but I hardly see it happening with a GT30 or something that size.

There so many factors involved.

I also agree with Adriano - There is no such thing as a freak car. There is a reason why the car behaves like that.

[paulr33]

i see

11.7afr @ 3200rpm ~ 90kmh

richens up to 11.2 and then leans back out again

11.8afr @ 4100rpm ~ 115kmh

progressively richens up to 10.8 afr around 4800rpm ~ 135kmh

then leans back out to 11.8afr around 5700rpm ~ 160kmh

then it progressively leans out to 12.1 afr before redline

i suspect you would get a good chunk of midrange power if the afrs were around 12 all the way through instead of richen up to high 10s and the back ground mid 11s. providing the egt's are ok it should be fine on low 12s the whole way through, usually a bit richer during boost build say upto 3400rpm ish~

your boost seems to ramp finally at 3900 so maybe a tiny bit before that a bit richer could help, then just 12s the rest of the way, again check afrs and egts on a dyno

[paulr33]

sorry its not clear - what are we debating/discussing?

the power is possible, its just it would be significantly better with a real tune

[dangerman4]

oh, and you simply can't make 270rwkw on 10.7:1 afrs...

hey Jono

have another look..

you say your a tuner yet you cant read a dyno printout ??

the 10.7 AFR is his first run in green = 207 kws

next run in red with AFR up to 12.1 = 270kws

he obviuosly started at 207kws then cranked some more boost into her and then did the red run

gettin up 270 od kws.

[Sydneykid]

Have I got this right,

278 rwkw

RB25DET

delta fin cooler

3" exhaust

gt3037 @ 14psi

38mm external gate with screamer

sub zero plenum

injectors are stock as far as im aware

afm is stock

In a Silvia

Ts = 118 mph

I agree, it doesn’t add up.

1. The TS should be 125 mph or so for that sort of power and weight.

2. The AFM will be reaching 5 volts at a bit less than 4,500 rpm (~220 rwkw). That leaves 3,000 rpm of only mapping via RPM points

3. The standard ECU doesn’t like that sort of stuff at all

4. Someone put a SubZero plenum on and left the injectors standard, seems illogical to me

5. The standard injectors flow 370 cc’s at standard pressure (36-38 psi). That’s 370 bhp, or ~215 rwkw. So 278 rwkw out of standard injectors at standard pressure is impossible.

6. The A/F ratios being all over the place, particularly the richness ~4,200 rpm to 6,000 rpm, indicates larger than standard injectors are likely.

7. The reason why it is hard to drive down the ¼ is the non linear response from the engine due to the tune being all over the place

My guesses, Z32 AFM, chipped/bent ECU and 500 cc injectors.

Fix the tune and it will make a bit more max power (over 300 rwkw), a heap more average power (particularly in the all important 4 to 6,000rpm range) and it will be much faster and more consistent down the ¼.

cheers

[mad082]

Is that the 280rwkw car your talking about?

Std injectors & ECU?

not possible.

backed it up with a 118mph pass at the strip

the ecu has been remapped. the stock ecu has a speed cut at about 112mph (180kmh).

what does the car hit the rev limit at? if it is above 7000rpm then that is another sign the ecu has been remapped.

[drag-on silvia]

not possible.

the ecu has been remapped. the stock ecu has a speed cut at about 112mph (180kmh).

what does the car hit the rev limit at? if it is above 7000rpm then that is another sign the ecu has been remapped.

ahhhh the point of the day, i dont have a speed limiter??? (she has been way past 180kph)

Have I got this right,

278 rwkw

RB25DET

delta fin cooler

3" exhaust

gt3037 @ 14psi

38mm external gate with screamer

sub zero plenum

injectors are stock as far as im aware

afm is stock

In a Silvia

Ts = 118 mph

I agree, it doesn’t add up. we both agree it dont add up

1. The TS should be 125 mph or so for that sort of power and weight. as stated i cant drive to save myself

2. The AFM will be reaching 5 volts at a bit less than 4,500 rpm (~220 rwkw). That leaves 3,000 rpm of only mapping via RPM points agreed

3. The standard ECU doesn’t like that sort of stuff at all

4. Someone put a SubZero plenum on and left the injectors standard, seems illogical to me i was offered the plenum for 200 bux and it retains the stock inlet runners and fuel rail thus the still standard injectors

5. The standard injectors flow 370 cc’s at standard pressure (36-38 psi). That’s 370 bhp, or ~215 rwkw. So 278 rwkw out of standard injectors at standard pressure is impossible. agreed

6. The A/F ratios being all over the place, particularly the richness ~4,200 rpm to 6,000 rpm, indicates larger than standard injectors are likely.thats a verry interesting point, what would be the easiest way to check this out

7. The reason why it is hard to drive down the ¼ is the non linear response from the engine due to the tune being all over the place

My guesses, Z32 AFM, chipped/bent ECU and 500 cc injectors.

Fix the tune and it will make a bit more max power (over 300 rwkw), a heap more average power (particularly in the all important 4 to 6,000rpm range) and it will be much faster and more consistent down the ¼. thats the kind of enthousiasm i like to hear

[n0nac]

bwah now your just giving him a big head

hahahaha

neways yes i agree things dont add up!!! lol arwellz

[R31Nismoid]

drag-on, you definately dont have a stock ECU.

I can assure you of that, and likely hi-flowed injectors or slightly bigger ones... so it all looks factory... but it isnt

Get a pic of the inside of the ECU for us

[drag-on silvia]

will do over the weekend

[Cubes]

yeh mine made 254 and went bang after 3 months but that was due to bad tuning aswell but....i know theres a dude here in sa making over 300 on the stock internals and has done for a while

Yes Freebaggins old 33 was making slightly over 300rwkw (313rwkw from memory) for years.

Tuning with regular checkups is critical.