Back to the drawing board!

[macka]

Well thats what happens when u expect too much. You do the hard work, do it yourself, properly...and u get a shitty Dyno readout, I know it means nothing but yknow....

On Formaz dyno i peaked 296hp @ 15psi

3pm this arvo so pretty warm still,

Ignition only 15 degrees due to pinging

The car is good for about 18psi at the moment with that turbo but the heart was going too much and in my eyes all i could see was blue smoke come out the exhaust but was only water vapour! So i limited pressure to 15 and tuned to 11.6A/F

Im not sure if my graph looks tuned properly but it cost me $240 grrr

I cant tell much difference from when the SAFC was tuned to before it was tuned, I have an aftermarket TOP SECRET Computer which seems to advance top end timing which limits me to sucky 15deg base timing which robs me of power!

I basically got 26hp from 2.5psi increase an increase in size of compresser housing to T04 and SAFC tune

Am i expecting too much to say that i should of gotten more?

[Pva_Glue]

GO FOR bigger turbo and higher PSI!

cheers

Joe

ps. "you do sooo much you know! you not a super man!" :lol:

[GTS-t VSPEC]

Don't worry too much, we've all been there (or going there), that is spending a shitload of money and getting sfa in return. I've often been surprise that by doing very minor mods how you can get a large increase in power, and yet throwing thousands can reap so little.

Anyway getting big reliable horsepower isn't as easy as we would all like, just adding a bigger turbo isn't a miracle cure.

Don't be too disappointed, it can only make you strive harder to improve the car and the power.

See'ya:burnout:

[macka]

Originally posted by GTS-t VSPEC

Don't worry too much, we've all been there (or going there), that is spending a shitload of money and getting sfa in return. I've often been surprise that by doing very minor mods how you can get a large increase in power, and yet throwing thousands can reap so little.

Anyway getting big reliable horsepower isn't as easy as we would all like, just adding a bigger turbo isn't a miracle cure.  

Don't be too disappointed, it can only make you strive harder to improve the car and the power.

See'ya:burnout:

Ya i know what u mean...

But of course a bigger turbo isnt the only thing ive done in fact iv hardly changed turbo characteristics since my last run with 270hp on same dyno @13psi I expected the tuning to reap more! perhaps it was because it was a friday and they were in a hurry to get out of there and crack a beer

[GTS-t VSPEC]

I must admit when I added my engine management (Wolf 3D Ver.4 plug'n'play) the power increase was quite substantial. I had setup all of the airflow system first, i.e. Greddy Plenum, 3" intercooler pipes, R34 GTR FMIC, 90mm throttle body etc. The increase in power was so substantial that my factory clutch only lasted 2 days.

I now have an OS Giken twin-plate to handle the power.

It is never a good idea to rush a tuning job, because there are so many variables, there can be substantial power in a couple degrees of timing etc.

If you really think that there should be more power then go somewhere else and get them to tune it. But don't blame me if you end up getting less power.

I tend to concentrate more on the difference in road power output, than that on the dyno. If you can feel the difference on the road then thats all that really counts, but its nice to have a dyno sheet that shows a curve that most mountaineers would be scared to climb.

See'ya:burnout:

[macka]

Originally posted by GTS-t VSPEC

. , but its nice to have a dyno sheet that shows a curve that most mountaineers would be scared to climb.

See'ya:burnout:

Adam32 has one of those

I dont really care what it says on the dyno at the end of the day, but it is a basis on which u can better and correct things that have happened. Im not going to tune my car on the road. Ive done that before with other cars..

Thanks for the insight tho

Vspec gtst?

[PSIKO]

what's a gts-t v-spec??

[GTS-t VSPEC]

I guess I should expect this, I've already answered others on the forum. Probably should change my user name.

My R33 GTS-t has a VSPEC diff, yes it does have the fins on the diff like the VSPEC's. That means that I have the benefit of both traction control and Active LSD. It came from the factory with this so I presume there aren't too many of them around.

The Active LSD is really cool for high speed cornering, causing the back-end to quickly turn in so you can keep the power down.

See'ya

:burnout:

[Pva_Glue]

Do we call them Rice or not?!?!?! :lol:

cheers

joe

[skyzerr33]

nah we call that a great buy

hows it hook up compared to a stock gtst diff if you've had the chance to drive one?

[rob77]

This is why I have never been really interested in measuring a car's performance by what the dyno says. You get into the "my car pulls 350HP""yeah but my car pulls 450HP" Unless its the same dyno, same day sort of thing it isnt worth the hassle. As its been said before its best to visit the same dyno each time to get a realistic figure of how much performance you have gained. This is why I like 1/4 mile times, but again simular arguements can happen. Maybe you should ditch the ecu and go for an apexi fc or something. Obviously the top secret ecu was tuned for 100ron fuel etc etc

Rob

[GTS-t VSPEC]

Skyzerr33,

The Active LSD really does crap all over the standard diff for high speed cornering, you can go in way to fast, turn the wheel and the ass end will follow. It would be useless for drifting but I think it would have an advantage in circuit style racing.

See'ya

:burnout:

[PranK]

i have heard fantastic things 'bout the VSPEC diff in a '33 - i almost got one for mine (back in the day! )

sorry to infiltrate the perth peeps!

[skyzerr33]

Originally posted by PranK

i have heard fantastic things 'bout the VSPEC diff in a '33 - i almost got one for mine (back in the day! )

sorry to infiltrate the perth peeps!

never fear i'll go hi jack nsw thread or 10

and thanks for the reply vspec

[Steve]

Originally posted by macka

I basically got 26hp from 2.5psi increase an increase in size of compresser housing to T04 and SAFC tune

Am i expecting too much to say that i should of gotten more?

My sympathies dude, I'd be pretty disheartened. Just doesn't seem to add up does it?

[GTS-t VSPEC]

It's amazing some of the oddities that come out of the Nissan factory. I was speaking to a guy today who was telling me about an R33 GTS-t which had 4WD.

An no this is not some punk kid who couldn't tell the difference between a GTR and a GTS-t. This was in fact an Automotive Engineer, the ones who sign off on modifications for ADR's etc.

So it goes to show that sometimes you can score in the lucky-dip that is Jap Imports.

Anyway back to the real thread, sorry to have side tracked the discussion.

It does seem a somewhat piddling increase in power for the extra gear that your running. I suppose you have checked all of the usual culprits for lack of horsepower, i.e. boost leak from intercooler pipes, gapped spark plugs etc.

I agree it doesn't seem to add up, but the problem with chips even from companies as good as Top Secret, is the lack of tunability. You kind of have to pop it in a hope for the best. They will have tuned there ROM's for 100+RON fuel, therefore allowing them to run more timing. I went for full engine management just so that at whatever stage I want to take the car I can keep the same computer.

8x 1000cc injectors?? Yeah no problem we can tune that, bigger turbo?? easy. Anyway you get the idea. The Japs love to have multiple piggy back systems, but I don't necessarily believe it gives reliable results.

I'd try an speak to a number of tuners around the place and see if they agree with you in lack of performance increase. It does'nt cost anything to ask, well not usually.

See'ya:burnout:

[adam 32]

macka as far as i understand it; you need the turbo to flow more air, to do this you get a bigger turbo. HOWEVER then you sacrifice driveability (note my 4000rpm spool-up). if i were you id be happy with the car as it is, it is fast! just cos shan's still faster, dont worry well work something out

wait til wednesday and see what times you post down the 1/4 before claiming a lack of power etc. more power doesnt neccessarily make a faster car and if you run a 13.5-13.6 (as you should) then id definately be happy.

then 550cc injectors, Z32 AFM, and 18psi :burnout:

[Dr_Drift]

Macka, I'd say it was the ECU dude... They run multiple maps in all of those plug in ones, and switch to the low pwer soon as they hear any detonation.....

In my opinion most of the good power gains come from the ignition timing.......

L8r

Doc.

[Hicks]

Gtst v-spec, How's the wolf goin?

Is it recomended by you?

By the way I'll have your AFM to x-speed this week.

[GTS-t VSPEC]

Hi Hicks,

Yes I'd recommend the new Wolf 3D Ver. 4, GTS-t plug'n'play. The new one for GTR's will be out soon, and I hear they are adding new stuff to control the 4WD, maybe power split between front and rear?

I was told by the guys at Xspeed that the Autronic was the only way to go, but when the new Wolf came out they have since changed there minds. The Autronic is still great but seeing as the Wolf is so much cheaper, more map sites etc, then it was hard to pass up.

See'ya :burnout: