Sydneykid Posted August 29, 2004 Share Posted August 29, 2004 Can someone tell me what valve sizes in RB26 and.......sorry SK No Problems, valve details follow; RB26 Valve Specs --------------Head-------Stem------Length------Tip Intake-----34.65mm----6.00mm----102.40mm----3.5mm Exhaust----30.15mm----6.91mm----101.55mm----3.5mm Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-993875 Share on other sites More sharing options...
MonstaS4 Posted August 30, 2004 Share Posted August 30, 2004 I got my block last week and after removing the head gasket noticed that there was a '2' stamped on each of the pistons and next to each cylinder on the deck. Is this an indication that the cylinders have been bored? The hone in the cylinders is pretty good considering the engine has 200,000k on it These numbers are grades or tolerances. Nissan has 5 grades for the RB30. I guess this is one reason for thier reliability. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-994595 Share on other sites More sharing options...
Wes M Posted August 30, 2004 Share Posted August 30, 2004 Thnx Monsta, I've pulled everything down now, so its time to start cleaning and making some measurements Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-994645 Share on other sites More sharing options...
Duncan Posted August 30, 2004 Share Posted August 30, 2004 There's 3 sizes for stock RB26 pistons too, 1, 2, 3 each .01 larger. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-994903 Share on other sites More sharing options...
Guilt-Toy Posted September 9, 2004 Share Posted September 9, 2004 Dropped the RB30DET in last night.. ohhh it looks sooo damn sexy.. hopefully we can get it running tonight!!! Im pretty excited shame I have to run it in and cant hammer it straight away how different will the rb30det sound and how different will it be to drive? ohhh RB30DET Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1007112 Share on other sites More sharing options...
Bl4cK32 Posted September 9, 2004 Share Posted September 9, 2004 sounds very tough. Mine is quiter than Joels rb20det on idle, but my exhaust is still very restrictive... Driving..well very diferent. Coming from the rb20 backround its a bigger step than going from the rb25 like yourself. More torque on take off.....ie wheelspin off boost Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1007167 Share on other sites More sharing options...
Guilt-Toy Posted September 10, 2004 Share Posted September 10, 2004 Tonight is the night unless something holds us up again *GRRRR* Should i run it in with no boost ?? (disconnect the wastegate) ??? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1007277 Share on other sites More sharing options...
Bl4cK32 Posted September 10, 2004 Share Posted September 10, 2004 i am to be safe. I had my tuner start it, which im glad i did....it was running very rich, so he pulled out fuel from the pfc. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1007454 Share on other sites More sharing options...
Guilt-Toy Posted September 12, 2004 Share Posted September 12, 2004 OMG. You guys have no idea how awesome a RB30DET is. i can now drive everywhere in 5th gear unless i go under 30ks an hour.. then i gotta go down to 4th..... I am just stoaked. this thing is unbelievable. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010108 Share on other sites More sharing options...
Bl4cK32 Posted September 12, 2004 Share Posted September 12, 2004 welcome to the club Im glad to see all went well.... Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010112 Share on other sites More sharing options...
Guilt-Toy Posted September 12, 2004 Share Posted September 12, 2004 hard boost cut (air flow meter cut) with standard computer at 3psi Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010174 Share on other sites More sharing options...
GTR-Ben Posted September 12, 2004 Share Posted September 12, 2004 3psi damn. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010177 Share on other sites More sharing options...
Guilt-Toy Posted September 12, 2004 Share Posted September 12, 2004 what max power can you get outta standard rb25det injectors with a rb30det ? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010179 Share on other sites More sharing options...
Guilt-Toy Posted September 12, 2004 Share Posted September 12, 2004 3psi damn. Not a standard turbo though... Probly good that it does that so it can get a good running in while i still wait for nengun to send me my pfc Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010181 Share on other sites More sharing options...
GTR-Ben Posted September 12, 2004 Share Posted September 12, 2004 Waiting on my PowerFc also. You should have ordered some injectors while you were at it. Got my Apexi 600cc's. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010188 Share on other sites More sharing options...
Cubes Posted September 12, 2004 Share Posted September 12, 2004 No problems with idle etc on the stock ecu? Maybe its just a RB20 ECU thing due to a different head (valve sizes etc). Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010192 Share on other sites More sharing options...
Guilt-Toy Posted September 12, 2004 Share Posted September 12, 2004 it idles fine.. seems to miss on idle a little but thats probly just the gap sizes ?? anyway I got the PFC just now how much were the apexi 600cc injectors? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010208 Share on other sites More sharing options...
GTR-Ben Posted September 13, 2004 Share Posted September 13, 2004 I scored them very cheap.. were used in a car for very few k's. Got them in the apexi bags with all the covers etc, look brand new just smell a little of fuel Normally say $1200-$1400 I would say for 6. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010267 Share on other sites More sharing options...
Cubes Posted September 13, 2004 Share Posted September 13, 2004 Now imagine how happy us R32 RB20 owners were with the torque of the RB30. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010294 Share on other sites More sharing options...
Sydneykid Posted September 13, 2004 Share Posted September 13, 2004 what max power can you get outta standard rb25det injectors with a rb30det ? Interestingly I have seen more power than when they were in the RB25DET. I believe it is because the rpm to make that power is lower, so the injectors can be open longer. An example, if I made 225 rwkw with the RB25 it would be at say 6,250 rpm. That means there is about 5/1000th's of second for each injector to be open. But if I could make say 270 rwkw with the RB30 at 5,100 rpm, then the injector could be open for 6/1000th's of second. This 1/1000th of a second longer time open means 20% more fuel, so that's why you can get 20% more power. Obviously engine efficiency makes a difference, but I suspect that probably adds to the advantage because a fresh (run in) RB30 is proably going to be more efficient than an RB25 with the usual K's on it. I have only one real world experience where we got 475 bhp out of the RB30 on the engine dyno. I have never seen more than the equivalent of 390 bhp out of an RB25 with the same injectors. That should stir up some comments I am sure. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/66/#findComment-1010540 Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now