Garrett Medium Frame Gtx Turbos

[Lithium]

Yeah, seriously - 4"... do you realise how much of a mad combination you've got here? I'd probably have gone for slightly larger cams, but regardless - this thing is going to have such an insane amount of power everywhere it makes me fizz.

[ido09s]

Same power for slightly less boost. (As im intentiinaly limiting it) This boost chart show Max boost like 4k. He recons more preload will / better tune will knock a bit off that. Made 293 rwkw.

So it was run up on Trents dyno and then Trent made 20 more? or is this 20 more between the 2 dynos? If in the short time Trent had it he was able to make 20 more kw then its certainly got some left in it

Not bagging out Trent but dynos are tuning tools and should not be used for comparisons.

[Simon-S14]

Very keen to see your results

same. i think i'll be some what of a first true comparison as most ppl who have changed to GTX also have changed a million other things.

[ShiftyTys]

So it was run up on Trents dyno and then Trent made 20 more? or is this 20 more between the 2 dynos? If in the short time Trent had it he was able to make 20 more kw then its certainly got some left in it

Not bagging out Trent but dynos are tuning tools and should not be used for comparisons.

Lol. Dyno are not meant for camparison. Every dyno is different. That 20 is just the difference in dyno. The boost v rpm is alot more accurate to what I feel with my foot to be honest. Very close to my own in car findings.

To those who want to see the real response etc do we want to get the donations started for a tune through Trent if i cant get avo to sort it? I can't afford it after the thousands I dropped for this install.

[Lithium]

That result sounds a bit more like it, are you going to post a dyno plot?

[ShiftyTys]

That result sounds a bit more like it, are you going to post a dyno plot?

Yeh I will. When I get home what did u want to see?

[ARTZ]

you got a nice missus....

that probably wanst as funny this time..

[Lithium]

Whatever you want to put up Boost curve and power are probably the main ones... thanks!

[STATUS]

So it was run up on Trents dyno and then Trent made 20 more? or is this 20 more between the 2 dynos? If in the short time Trent had it he was able to make 20 more kw then its certainly got some left in it

Not bagging out Trent but dynos are tuning tools and should not be used for comparisons.

unfortunately many dyno plots leave a lot to be desired and tend to give you a rounded / smoothed result.... nothing like the actual curve. In this case the the original dyno only had a few plots (often between 10-20 points of reference over whole graph which is very coarse) which were then interpolated to make a pretty average curve.

We were able to give an accurate graph with far more refference plots (plots every 50 rpm on average) based actual time in that particular gear same as it would see on the road, this graph far closer represented the on road feel.

We did not touch the car tune wise at all, i dont think its fair on the other shop, im sure they will rectify it without fuss.

Luckily we are able to extract far more accurate results with the dynapck but we had to pay a premium for it $$$ wise when we first purchased the dyno, as for the power difference it is very common to see around 20rwkw difference from that particular dyno to mine, it is a genuinely low reading dyno compared to the various others in the area.

I know most dynos will read different but we are lucky enough to have at least five or 6 around that read within a very small margin which allows for quick easy comparisons. i even had the opportunity to directly compare a car from HPF on friday and the difference @310rwkw was 3 kw.... but our curve was much more detailed and showed up alot of detail not show on the other dyno plot... not bad tune detail but actual engine characteristics dulled out by roller inertia.

Dyno are tools and as long as you extract the relevant data your chasing in the most detail then the actual number is irrelevant and in this particular case a few simple runs showed exactly what needs rectifying.

[ido09s]

Lol. Dyno are not meant for camparison. Every dyno is different. That 20 is just the difference in dyno. The boost v rpm is alot more accurate to what I feel with my foot to be honest. Very close to my own in car findings.

My point exactly. Way to many variables that could affect the power output. I dont know why AVO ran it in 3rd gear as it should have been run in fourth but that normally wont make much difference to the kw reading.

Send it down the drag strip now and see what mph you can run with it then get it retuned/sorted out and re run it again. Thats the best comparison.

Our car use to make 460rwkw but only managed to run 128mph on one or two occasions, mid to low 120's were pretty normal for it.... now it makes about 40rwkw less but runs into the mid 130's on a regular basis. Dyno's figures and peak power dont mean shit really

[ShiftyTys]

you got a nice missus....

that probably wanst as funny this time..

Still made me "lol"

[wolverine]

unfortunately many dyno plots leave a lot to be desired and tend to give you a rounded / smoothed result.... nothing like the actual curve. In this case the the original dyno only had a few plots (often between 10-20 points of reference over whole graph which is very coarse) which were then interpolated to make a pretty average curve.

We were able to give an accurate graph with far more refference plots (plots every 50 rpm on average) based actual time in that particular gear same as it would see on the road, this graph far closer represented the on road feel.

We did not touch the car tune wise at all, i dont think its fair on the other shop, im sure they will rectify it without fuss.

Luckily we are able to extract far more accurate results with the dynapck but we had to pay a premium for it $$$ wise when we first purchased the dyno, as for the power difference it is very common to see around 20rwkw difference from that particular dyno to mine, it is a genuinely low reading dyno compared to the various others in the area.

I know most dynos will read different but we are lucky enough to have at least five or 6 around that read within a very small margin which allows for quick easy comparisons. i even had the opportunity to directly compare a car from HPF on friday and the difference @310rwkw was 3 kw.... but our curve was much more detailed and showed up alot of detail not show on the other dyno plot... not bad tune detail but actual engine characteristics dulled out by roller inertia.

Dyno are tools and as long as you extract the relevant data your chasing in the most detail then the actual number is irrelevant and in this particular case a few simple runs showed exactly what needs rectifying.

I don't think anyone here was expecting there to be much wrong with the final power number. It looked a bit lazy coming on boost to most of us and that implied that there was more that could be done in the set up. Hopefully AVO can fine tune the potential issues you found and get Shifty the best result from his new turbo.

[BMYHOE]

Yeah, seriously - 4"... do you realise how much of a mad combination you've got here? I'd probably have gone for slightly larger cams, but regardless - this thing is going to have such an insane amount of power everywhere it makes me fizz.

4 inch will be the go then! soon as i have some progress will let you all know

[R31Nismoid]

There would be some good gains in the gate preload, i would nearly double it and that should see around 20rwkw @ 4000rpm alone, increasing the map resolution from 120kpa to 180-220kpa will stop it "flat-lining" give more control in the fuelling map. And finally setting the Vct.

Sounds like what we expected for the most part.

Not enough time/effort was put in initially. Thanks for clearing it up

Not surprised that there is a bit more response left in the setup, looked far too laggy/unresponsive compared to what seems to be floating around in the GT35R range

[ido09s]

Trent - There is a huge difference in a dyno that is setup right versus a dyno that is just set up. It also means a huge difference between brands of dyno as well. We used a DD where i worked and it was pretty decent. But, i no longer work there and another shop looks after our tuning duties now and their operator knows a lot more about the setup and back end so they can work with theirs a lot more effectively. Its all knowledge as Tyson is going to find out with his car it would seem.

It sounds to me that AVO just arent up to speed with what needs to be done. Thats not to knock them, some workshops just arent that way inclined with certain cars, nor are they prepared to take the time to carry out the R&D, but i guess you need to give them a chance before you go elsewhere.

I know the feeling though as i toiled with a high RPM miss fire for quite a while. After re wiring a few things and purchasing a brand new CAS the problem still wasnt fixed. Unigroup tried tuning the car but straight away said it has the dredded incorrect RPM signal being sent to the ECU at around 8000+rpm.

The new Harmonic balancer with triggers that Ross Balancers now market was designed on our car. It works a treat and it sorted it all out instantly. It now revs to 9000+rpm very cleanly. Pretty disppointed thats all it was but I just didnt know how to fix it Not everyone knows everything....

Edited June 29, 2011 by ido09s

[ARTZ]

prices i was given to tune my pfc car.

AVO..450

STATUS...650

Racepace...900

I guess u get what you pay for.

But considering shifty spent alot more than $450 i would expect better

[STATUS]

My point exactly. Way to many variables that could affect the power output. I dont know why AVO ran it in 3rd gear as it should have been run in fourth but that normally wont make much difference to the kw reading.

Send it down the drag strip now and see what mph you can run with it then get it retuned/sorted out and re run it again. Thats the best comparison.

Our car use to make 460rwkw but only managed to run 128mph on one or two occasions, mid to low 120's were pretty normal for it.... now it makes about 40rwkw less but runs into the mid 130's on a regular basis. Dyno's figures and peak power dont mean shit really

we are not interested in the peak, its all the important stuff we were asked to look at.... ie low mid and transitional.

[STATUS]

Trent - There is a huge difference in a dyno that is setup right versus a dyno that is just set up. It also means a huge difference between brands of dyno as well. We used a DD where i worked and it was pretty decent. But, i no longer work there and another shop looks after our tuning duties now and their operator knows a lot more about the setup and back end so they can work with theirs a lot more effectively. Its all knowledge as Tyson is going to find out with his car it would seem.

Yeah i understand, i used DD most of the time prior to opening up, i ended up with the dynapck after a really long decision process and after using the other offerings... it was not a plain sailing though as family friends own DTS dynos and unfortunately it did not meet my requirements and they no longer talk to us.. my biggest concern with the dynapck was the "perceived" setup time... i was always told by the DD guys it tok to long to setup but to be honest it takes less time than strapping a car down so luckily it was a moot point.

i reckon if i was offered to swap my 2wd for a new 4wd dyno for FREE, i would decline.. i would rather pay for the dynapack upgrade.

[STATUS]

computer fail edit

[STATUS]

Trent - There is a huge difference in a dyno that is setup right versus a dyno that is just set up. It also means a huge difference between brands of dyno as well. We used a DD where i worked and it was pretty decent. But, i no longer work there and another shop looks after our tuning duties now and their operator knows a lot more about the setup and back end so they can work with theirs a lot more effectively. Its all knowledge as Tyson is going to find out with his car it would seem.

Yeah i understand, i used DD most of the time prior to opening up, i ended up with the dynapck after a really long decision process and after using the other offerings... it was not a plain sailing though as family friends own DTS dynos and unfortunately it did not meet my requirements and they no longer talk to us.. my biggest concern with the dynapck was the "perceived" setup time... i was always told by the DD guys it tok to long to setup but to be honest it takes less time than strapping a car down so luckily it was a moot point.

i reckon if i was offered to swap my 2wd for a new 4wd dyno for FREE, i would decline.. i would rather pay for the dynapack upgrade.