ST240

I already posted this in the whore thread, but I'm in a rush, and it appears that doesn't get much traffic. My apologies. Can someone please do me a kindness and post the part numbers for King Bearings RB30 main and big end STD spec bearings. ACL is out until the end of summer. Jeez. I for the life of me cannot seem to nail them down. Kings webpage is pretty convoluted . Thanks in advance. Edit: I found these if someone can confirm, that would be great: Big Ends: CR6676SI Mains: MB7008AM These also appear to be standard performance, if anyone has a line on the race series let me know.

Can someone please do me a kindness and post the part numbers for King Bearings RB30 main and big end STD spec bearings. ACL is out until the end of summer. Jeez. I for the life of me cannot seem to nail them down. Kings webpage is pretty convoluted . Thanks in advance.

This is my exact build. Had a junker manifold and a .59 (!!!) housing and dynoed at 370 whp run in tune. Didn't get to dyno it after I added the true divided twin gate 6boost. Very responsive on my run in tune. If you tune it well you will be very happy. I have a feeling however, that the exhaust wheel will become the limiting factor. It is just too small. It seems better results may be had with the 6266. This is my opinion.

I have the rear feed blocked and the front restricted down to 1.5 mm. No head drain though... I didn't even have the restrictors before I swapped heads. Yes I did build it myself. And I did check the clearances. They all within, barely, but still in spec. I've built this engine before and I raced it two seasons with the RB25DE head without an issue. I didnt change anything on the bottom end and I it somehow died right after I put the RB26 head and new manifold on it. The reason I think it's starvation is almost all the big ends were cooked to varying degrees, and the mains were starting to go too. But maybe it isn't starvation. Someone on another forum is suggesting if the crank isn't straight it can do this. Surely it would have to be knocking quite badly to wreck the bearings this fast?? I do have one of those special bosch sensors that I can listen with, but I havent recently. I'm only running 16* at 8.3:1. I maybe have driven 100 km on it, and had only a handful of hard single gear pulls.

Ok so I rebuilt this thing. And the exact same timeframe, its f**king knocking again. What the hell could be starving my bottom end of oil so consistantly? Am I missing something!? I've only driven it hard a few times and I've kept the revs down. Theres also 6L in the sump. What the hell could be causing this???

Pulled it apart tonight. I immediately knew what happened when the bearings were clamped on the journals. Nothing a ballpeen can't straighten out. Hey guys, it's ok if my bearing shells look like bacon, right? At least the journals look ok. Yep. She starved of oil . I think I remember the corner that did it in actually, a sharp U-turn at about 7k. Lucky it was on the street and not a track where I may not have noticed it. I also forgot to overfill the sump. f**k! Damn RBs and their starvation issues. A few more hard pulls and it might have been a different story. This is how THREE of the six big ends looked lol. But at least the journals look half decent and can be reground. But in the spirit of this build I may even gamble and just polish them up, new shells, and slapper back together. Experienced guys, what do you think?

It was fresh oil this season. Good stuff too. It's been started many times and driven around a lot with a few small pulls here and there so...

The oil light came on idling at a red light the other night after some hard pulls, however my pressure gauge did not show a loss in pressure when the light was on (what causes the oil light to come on? Is it strictly a pressure loss? I later tinkered with the plug and it may or may not have been loose). I was a few blocks away from the house and I noticed this noise. The sound in the video only shows up at around 2500 RPM briefly. It also doesn't seem to really be there when the engine is cold. Tomorrow I will cut apart the oil filter to see if I can find bearing flakes. I'm really scratching my head as to what that noise could be. Almost sounds too rapid to be a big end bearing. But the fact that it's not there when it's cold is a little unsettling. I've also read on lots of RB forums guys think the sound is coming from the head, which this one does, and it ends up being a big end bearing. Any ideas? Funny how I bagged the living shit out of this engine all summer last year and the first few hard pulls this year she gives me problems.

Interesting result... Were both at the same rpm?

I'm switching from the 25DE head to the 26 head this winter mainly because I'm sick of the crossover pipe cluttering up my engine bay, and a custom plenum is $$$ compared to a 26 head. Surely the 26 head doesn't UNDERPERFORM vs the 25DE head in any regard does it? The only place I could think of there a remote possibility would be low and mid range TQ... Is there?

Then it would behoove one to run a cheap simple mod like an BAT (boosted air temperature) sensor in the intake.

I had also thought about the efficiency thing too but I neglected to mention it. Good post .

Why does big boost have such a bad stigma? Its my understanding that it's not like the "boost" is anything scary in and of itself. Its combustion pressures that blow your engine up, not "boost". Some people think that because person A is running more boost with a turbo than person B with another turbo, yet theyre making the same power on the same engine, that person A more likely to scatter their engine, which is false, no? The byproduct of high boost is more air, and thus fuel, in the engine, plain and simple. Am I wrong with this logic?

Here's my RB30 6262 dyno I just posted up! http://www.skylinesaustralia.com/forums/topic/382792-precision-6262-rb30-dyno/

RB30 bottom end ARP head studs ARP rod bolts Stock rb25 headgasket R32 RB25DE head Precision 6262 .58 T4 undivided Deatschwerks 740cc Z32 MAF LS2/truck coilpacks Same side entry vertical flow intercooler This thing is running PIG rich; when I got in there it wouldnt even register on the sniffer (<10:1). I should have tuned that out beforehand. I pulled some fuel and it went from 350 to 370 HP and it still didnt even register on the sniffer. With more fuel pull/timing add 400 rwhp is certainly possible. Not bad for the JB 6262. I'm impressed. The only downside is the .58 rear is choking it above 5800. Operator let off at 6500. Original project here: http://forums.780tuners.com/showthread.php?118785-My-RB30-240sx-project