High Kw Reading

[nisskid]

hey, basically i have what i think is a very stock r32 gts-t 4 door. all it has is a 2nd hand 3inch catback exhuast and it is getting over 150kw's on turbo tunes dyno which has recently been re-calibrated.

just want to know why it is getting such a figure. i was told on ns.com is could be a "freak engine" but im more suspicious of something like a hi-flow turbo or ecu remap that i cant see.

so yeh, what u guys rekon?

Dyno Sheet:

[Stel]

From the look of your AFR's it seems to be running lean...when it runs lean it'll make more power, but is not very safe...

I would look into getting a cheap SAFC which will fix your afrs and make the car alot safer.

13.5 AFR is pretty dangerous, should sit around or below the 12.

[Thunderbolt]

But it's not 13.5 as it clearly dips below it. I'd say it probably is somewhere around the 12 mark in the top end.

The dyno dosen't look like it has been done in shootout mode. Therefore the figures could be somewhat unreliable. I know you say that it has been re-calibrated, but that could mean that they made it read higher than it should. How does the car feel on the road? does it feel like you have 150? Dynos are simply a tuning tool, that's it. If you want to brag to your friends about power then you need to take it to the real dyno which is the strip.

Edited May 20, 2006 by Thunderbolt

[R31Nismoid]

Therefore the figures could be somewhat unreliable.

And shootout is reliable?

[Bunta]

And shootout is reliable?

Now Im not having a go at you here this is a genuine question.....if everyone was to use shoot out mode would it make results more compareable every where in the country or is there a lot of varience in shoot out results too??

[Sydneykid]

For that boost level, cat back and those A/F ratios I would say 130 rwkw is about right. The dyno must be a bit "happy" to get 150 rwkw

The real question is, why are the A/F ratios so good? Maybe ECU chipped, pull the cover off and have a look.

It is certainly not a high flow turbo as the boost drops off just like a standard one.

cheers

Edited May 21, 2006 by Sydneykid

[R32Abuser]

Mate i really dont think you have a "freak engine" considering

1. The dyno was not on shootout mode-therefore isnt really comparable to anyone elses dyno results

2. For those mods, not even a freak engine could make that sort of power, considering dead stock a RB20DET puts out about 110-120 at the rears if that, so from the mod you've done (only half ur exhaust system really) it may have gained 30-40RWKW...Dont reckon thats possible.

Your in South Australia, so next time you get the chance to dyno it take it to a better place i.e. Boostworx, Morpowa etc. etc.

just my thoughts

[R31Nismoid]

Now Im not having a go at you here this is a genuine question.....if everyone was to use shoot out mode would it make results more compareable every where in the country or is there a lot of varience in shoot out results too??

Why would ya be having a go?

As much as Dyno Dynamics would like it to be exact, it sadly isnt.

There are too many ways to fudge stuff if you wanted too, and its not that difficult.

Just use the dyno for before/after/tuning and the figure as an "approximate" that has a variance of 15rwkw either way is what i do generally.

[Thunderbolt]

Now Im not having a go at you here this is a genuine question.....if everyone was to use shoot out mode would it make results more compareable every where in the country or is there a lot of varience in shoot out results too??

Well you have to understand that the main reason shootout mode exists is to make results more comparable between different dynos. Not saying that there can't be variances, but there is limited scope to purposely fudge the figures. One of the few things that you can do to play with the results, is with regard to the intake temp - puting the sensor somewhere that it shouldn't be etc.

Edited May 21, 2006 by Thunderbolt

[nisskid]

Mate i really dont think you have a "freak engine" considering

1. The dyno was not on shootout mode-therefore isnt really comparable to anyone elses dyno results

2. For those mods, not even a freak engine could make that sort of power, considering dead stock a RB20DET puts out about 110-120 at the rears if that, so from the mod you've done (only half ur exhaust system really) it may have gained 30-40RWKW...Dont reckon thats possible.

Your in South Australia, so next time you get the chance to dyno it take it to a better place i.e. Boostworx, Morpowa etc. etc.

just my thoughts

yeh I don't think I have this "freak engine" but I just want to find out why such a high reading. The guy at turbo tune(Mark) simply rekons the engine is a good engine.

I have already posted a similar topic on ns.com but I figured id post it here as u guys would know more. Here's a link http://www.nissansilvia.com/forums/index.p...opic=157447&hl=

as u can see mark from turbo tune replied to my thread

our dyno does not read high, in fact at one stage it was reading 10rwkw less than it shoud :S , and has recantly been re-calibrated....

nisskid, feel free to bring ur car back if you want to do another run on the dyno wile you watch, we will look after you with the price....if thats what you decide to do.

line up of the best of the best!!!

I also wouldnt mind showing this, it is marks car for sale which pulls 165kw on the same dyno as mine, have a look at the mods list: http://www.nissansilvia.com/forums/index.p...opic=157348&hl=

and that sounds bout a right figure for those mods, so i dont think the dyno could be running that high.

Edited May 21, 2006 by nisskid

[R32Abuser]

hey mate,

just see what happens, next time u need to get something done regarding tuning to your car, id take it somewhere different to see what your car pulls on another dyno. At least then it will confirm if your engine is just fresh or whatever. But otherwise, id just take it as a fairly high reading and wouldnt think too much of it. The power is really only comparable to something else ON THE ROAD. Which then there is far more reliance on the driver etc. etc.

[nisskid]

alright, i have firestone 205's and when booting it will loose the rears when i hit about 5krpm, then into second they keep spinning for a second or 2.

dunno if that gives u an idea of how much power it feels like. it feels alot faster than my mates CA auto 180sx, and faster than my brothers statesman which is about 125rwkw.

[Sydneykid]

yeh I don't think I have this "freak engine" but I just want to find out why such a high reading. The guy at turbo tune(Mark) simply rekons the engine is a good engine.

I have already posted a similar topic on ns.com but I figured id post it here as u guys would know more. Here's a link http://www.nissansilvia.com/forums/index.p...opic=157447&hl=

as u can see mark from turbo tune replied to my thread

I also wouldnt mind showing this, it is marks car for sale which pulls 165kw on the same dyno as mine, have a look at the mods list: http://www.nissansilvia.com/forums/index.p...opic=157348&hl=

and that sounds bout a right figure for those mods, so i dont think the dyno could be running that high.

Sorry for repeating myself but dod you notice this question?

The real question is, why are the A/F ratios so good? Maybe ECU chipped, pull the cover off and have a look.

cheers

[nisskid]

are they that good? from what i have been told its too lean. Mark from turbo tune didnt say anything about it so im not too worried.

[nisskid]

so what do i look for when looking for the chiped ECU?

[Al]

The only way to compare dyno graphs is to have a "dyno day" where a group of cars get together on the same day, at the same dyno, operated by the same people.

It is only then can you compare against someone with similar mods. Or you can see how a combination of mods work and don't work.

At the last Vic dyno day i had the highest power figure but saw how shit my tune was compared to others, thus i was missing some bottom end response.

[R31Nismoid]

so what do i look for when looking for the chiped ECU?

open the cover, of the ECU

you'll soon notice if its chipped.

Worst case, get a pic and post it up and we'll tell you

[nisskid]

yeh, i missed the last few dyno days but will have to get along to the next one.

[nisskid]

ill get looking at the ECU

[NewKleer]

maybe you need to teach the dyno operators how to set the graphs up to. to have AFR scale from 10->44 is absolutely stupid. as others have said, AFR looks too good (but cant tell for sure due to scale), so there could be soemthing going on there.

Edited May 21, 2006 by NewKleer