White smoke after RB26 rebuild

[Cubes]

No problems RB26zcar.

[yamaha227]

engine still in bits, should be back together within the next 3 weeks, will let you know how it all goes this time...

[yamaha227]

well after many months of the road i finnaly have my GTR going again... and best of all no more smoke. would be quicker to write what the engine bulder did right than wrong, ended up putting genuine nissan rings back in as i didnt trust him with anything more complicated, once the block was honed again and the pistons rods and crank were fitted i took the bottom end home while the cylinder head was sent south to sydney.

Had some mild porting work done while it was away as i figured it would be a good time to have this done... not keen in pulling the engine out again in the near future although im getting pretty quick at it.

Its all run in now and running sweet, finnaly going to get a chance to get it to the drag strip and see what it can do. have been noticing a little bit of detonation everynow and then, seems to be late at night when the air is cooler as the peak hold function on my boost controller is showing its making around .6 to .8 bar more peak boost at night than during the day, have 3 setting's so will probally try and set the third setting to something i can use at night. would have thought it would be less prone to detonation when its cooler, but i think the boost controller is not helping the situation, may be something to do with the sensitivity of the gate pressure aswell so might take a bit of mucking around to get right. havent seen anything over 62 on the power fc and its only on the odd occasion so im not to concerned, but definately needs fixing.

Any ideas on what heat range spark plug would be best for our heat up here. its generally never below 20 at night and about 30 to 35 during the day. its running HKS 2530's at 1.5 bar, was thinking about getting some IRITOP NGK's in the 8 heat range and seeing how they go. it had BCP7ES when it was in melbourne so was thinking the next colder heat range might be better for our hot weather?

So the next step will be some better cam shafts to suit my head work and turbo's, as i still have stock cams, anyone have any opinions on what cam shafts would best suit my setup?

It's awesome to finnaly have it going again, nothing beats the feeling of punching a modded gtr down to the shops... hopefuly it pulls a good time at the strip

[markr34gtr]

put some good fuel in it when you go to the strip on higher boost...

on pump fuel i would stick to 18 or 20 psi to be safe.... use 7 or 8 heat range plugs at .8mm gap....

cheers,

[yamaha227]

will do, always use BP ultimate but think for the strip i might add some toluene just to make sure, its so hot up here and everything helps.

How will the toluene go with the iritop plugs?

[Sydneykid]

We only ever use copper plugs, iridium, platinum etc are only of use when you want long plug change intervals. The plugs never stay in our engines long enough. We run the BCPR7ES everywhere. I really can't say as I have seen any difference as a result of ambient temperature, and we have raced in 40+ degree weather. I guess when you have an ~800 degree explosion, 10 degrees either way doesn't make a lot of difference.

Hope that helps