Jump to content
SAU Community

Recommended Posts

  • Replies 56
  • Created
  • Last Reply

Top Posters In This Topic

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?

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.

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

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.

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.

:mad: cheers :D

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.

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

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 :D

Get a pic of the inside of the ECU for us

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. :D

Tuning with regular checkups is critical.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
×
×
  • Create New...