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Reading Dyno Graphs

Klymax

By Klymax,
in Engines & Forced Induction

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GeeTR Grand Master

GeeTR

Posted
Posted (edited)

You seemed to have missed the point, but thanks any-who Beau.

EDIT: 5min of power Googleing had at least 5 ppl from SAU, Wikipedia and users from 3 different Skyline affiliated forums / sites say your incorrect... and non say you are correct. NVCS is on R33 25's, VCT is on the Neo's. Do you rem where you read about VVL?

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666DAN Grand Master

666DAN

Posted
Posted
yeah i tried telling some one else here that...

the rb's VVL is variable valve lift.... not variable cam advancement/retardment, it is not

like a honda vtec.

under each cam lobe is a hydraulic lifter that acts like a mini hydraulic ram expanding and contracting depending on the oil pressure and how much oil the ecu lets flow via the solenoid controlling it.

on a normal non vvl rb these hydraulic lifters are replaced by normal solid buckets.

when this occours it creates more lift increasing the airflow around the valves as it enters the

combustion chamber.

Is that why R34's have solid lifters and VCT?

The VVL wasn't found on any RB25...hence no RB25VET exists....and btw Nissans NEOVVL was the equivalent to VTEC, not the VCT(NVCS)

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Klymax Contributor

Klymax

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Every 12 months the dyno results get higher and higher, first it was 200rwkw in '06, then 220 in '07, now 240 '08 on a stock turbo?

Please... 240rwkw on a stock turbo is a load of rubbish. Get out there and run a 112mph (minimum) pass and i'll believe 240rwkw.

IMPUL ECU doesnt mean a lot, just a chip etc really, with an unknown map it almost makes it more of an issue than the stock ECU.

Also - didnt the Tuner tell you how much boost you were running?

Honestly i think the place your choose for the work is being fairly lazy with all of it. If possible i'd head somewhere else... although being Darwin your probably restricted in that matter.

Also 1bar on a stock turbo, is silly.

Yeah mate. There was a place here, Though he has closed down at teh beginning of the month. I hear theres 2 others dyno's around though I've not heard many good things about them when it comes to imports so I'm worried as theres not many 34's here yet also so knowledge of them will be a little more limited also. My previous tune was for 10psi (hot here so keep it safe on the I guess stock turbo).

I suppose the best thing to do is to get the front/dump, fmic, powerfc and get a tune done to see where its at then?

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