Power Issues

[AsH__85]

Hey all.

Just a quick run down. I have an r32 GTR when I originally got it it was a bit of a slug so I took it to a certain workshop best not to mention. to see if they could tell me what was wrong with it........ well, a set of turbo's (which they told me were 420h when infact were 320), power fc (with an incompatable hand controller) a tune (that made 192kw at all 4 on 18psi) and a 6k bill at the end of it. the engine started knocking 2 days later, but that is another story.

So i ended buying another rb26 (5k) , engine seems tidy supposable about 60'000k's since a rebuild. I swapped all parts over and is in the car now did compression test I cannot remember exactly what it got but it was fine. but now after another mechanic has tuned it it is only getting 220kw at rw with the following mods at 14psi.

- pods

- cam gears

- garret 2860r (small ones)

- split dump's and full 3" exhaust

- Power FC

- apexi AVC-R

Thats all i can think of at the moment. That is not normal is it? just after some opinions and maybe some suggestions.

The engine wasnt leaning out just wouldent go any harder. Even the mechanic said he was expecting alot more from it.

cheers guys

[Devils_Advocate21]

Dynos are for tuning tools mainly, figures can vary alot aswell, plus have you got a dyno graph preferably with afr curve on it this could be a problem not smooth? what are the cam gears set at? did he change anything? so many questions so thats a start

[tridentt150v]

fmic?

[Zas)-(]

lol my thing too front mount?

but still on 18 psi man thats pretti low for a gtr..... thats had tuning and new turbos..

i dunno maybe somebody else mite have abetter oppinion ?

[paulr33]

dyno plot please

we need to see power and AFR

also what about fuel pressure

and boost pressure

they would help

[R31Nismoid]

He has a GTR, it already has a decent FMIC.

14psi 220rwkw = shit... thats if the dyno is on the ball.

It should really be up around 250-260rwkw or there abouts

The turbos you have, with around 20-22psi should see you around 330rwkw.

Its time to find another tuner.

Cheers.

[itbmils]

dyno plot please

we need to see power and AFR

also what about fuel pressure

and boost pressure

they would help

Agree with everyone else here - I have an R32 GTR with similar mods seeing 280awkw @ 18psi

have not seen any mention of mods to fuel - fuel pump and fuel pressure regulator ?

what's a std pump and fuel mixture going to deliver ?

[AsH__85]

Firstly thanks heaps for the reply's I am not as honed into the tuning side of cars as I would like to be, but I will tell you as much as I can.

- The tune was done about 1 month ago and they tuner's printer was stuffed something along those lines, I couldent get a print out. He showed me the results on screen. They were sharp curves and smooth all the way to 220kw then it was like they hit a wall. He said he coudlent sus it out, I am not sure if that is any kind of indication at all.

- Its only got a stock fuel pump but wasnt showing any signs of leaning out at all, he he stuck a gauge on to check the pressure and said there was heaps.

- He did advance the exhaust cam a little I am not sure exactly how much but he said it made a bit of a difference.

- It has got a factory frount mount but I assumed that would be ok for a bit more power than this, but I am far from an expert.

The car is in a few pieces at the moment with me trying to clean everything up and looking for any leaks or anything a bit dodgy. It should be all back together by then end of the weekend so I will try and get the dyno print out if he has it, otherwise I'll get another dyno.

Also whilst this has all been going on I moved to darwin right after the engine was put in. (truck drivers stole my audiobahn amp, and my tyres bald as bald when the car got here, again another story) so air temp is like 32 deg all day, and there is a vast lack of tuners and dyno's around!

[S1R33]

hey mate, where did you take it to get it tuned, dave at high tech or jason at jsm

[AsH__85]

pm sent