pinking..
 

i get the detonation rattle during acceleration, before it gets to full boost, its not loud as proper det, can only hear it when driving next to a wall or fence. im sure i have heard it a few times, but wasnt sure, i havnt change anything timming wise on the engine in 5 years, but i havnt changed the plugs in bout 3 years :trout so as im running about 10-11 psi boost, what is the best setup for the timming at idle to make sure i keep the acceleration but lose this worry about det.

cheers guys. :D

have you checked your fuel pressure ? people usually set there timing at around 17.5 i think, i never bothered though, i left mine at 15 degrees on the std ecu to save the hassle of dettin, why not have it set up on the rollers and check everything is ok.

coz the turbo is fooked atm, and if they put it on the rollers, they wouldnt be able to see the screen :D getting mt T25 sorted soon, blackpool turbos have quoted £250 all cleaned, and new bearings and seals. then comes the little mods to fit the bugger.

just a little concerned about the det sound, may check the timming tomoz. will put it at 15 deg, as im running unleaded.

what octane unleaded are you running, as they need 97 ron as std, well thats what it says on the petrol flap, i never go below 97.

last lot i put in was 95 normal, but i use that quite often, can using 97 and above help with det then (not really up on octanes etc)

Higher the RON rating on the fuel the less likely it is to pre-ignite.... run the Tescos Special brew, it's good stuff!

the mani gaskets can sound like DET in the early stages of failure

feck me mate, you don't want to run that shite in your engine, it needs at least 97 as normal.i wunt even drink that, and i drink some rough stuff lol.;)

mani gaskets are ok, tis deffo det im sure.

i shall take on board what you said shaun. ill put in the super next time.

standard timing is 15dbtc. I would keep it at that but always run 97ron fuel or higher as instructed by nissan. Only time i put 95 ron in is if im motorway driving long distance and dont intend on coming onto boost or high rpm at all.

If you fit some new cold plugs and use super unleaded im sure the pinking will go away.

You may find that your fuel pressure regulator needs changing if all else fails. They are common faults that alot of people dont realise they have.