winstonusmc Posted January 8, 2014 Share Posted January 8, 2014 (edited) I have been collecting some parts for my new RB25NA project. After the motor is in my Z and tuned, it will be for sale with all the stuff needed to drop it into an S30 minus the ECU. The details: 08U block (RB25 from an R32 GTS25, no VTC) RB26 Head RB26 ITB w/ custom velocity stacks Megasquirt Version 3 FS5W71C transmission (the little one) This motor has already powered a car in this configuration. It was in a joint venture drift beater when I was stationed in Okinawa. We beat on it for a while. I tore it down an shipped it to San Diego with intentions to put it in my 240z, but decided to stay L-Series. Since the 200zr pans are long gone and when they do pop up on the forums they are $600, which is pure thievery, I decided to mod a stock pan. Hasn't been too terribly difficult thus far and I hope it doesn't leak. Haven't modded the pickup yet, but its going to be simple. In one of the picks, I show how the L Series and RB lean opposite directions, making the oil pans a mirror image of each other. Have to order a set of bearings now. Have been going back and forth about ACL bearings, anyone have an opinion? Edited January 8, 2014 by winstonusmc Quote Link to comment Share on other sites More sharing options...
pr20de Posted January 9, 2014 Share Posted January 9, 2014 ACLs are great, I've had them in my big boost sr20 for a while now. No complaints. Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted January 10, 2014 Author Share Posted January 10, 2014 Reoriented the pickup and welded the bottom on the oil pan. Now gotta find a plug, or just never change the oil. Quote Link to comment Share on other sites More sharing options...
~KnuckleDuster~ Posted January 10, 2014 Share Posted January 10, 2014 Very cool, looking forward to hearing this beast! Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted January 10, 2014 Author Share Posted January 10, 2014 Old drift car in Okinawa running this motor. The second is an 8k rpm rev http://www.youtube.com/watch?v=mOnaceXoJHs http://www.youtube.com/watch?v=APfgB3RAhSM Quote Link to comment Share on other sites More sharing options...
~KnuckleDuster~ Posted January 11, 2014 Share Posted January 11, 2014 Nice. The RB makes a great sound. Here's my old RB25DE Z cruising around.. http://youtu.be/piEFnmGiY48 Quote Link to comment Share on other sites More sharing options...
docaam Posted January 27, 2014 Share Posted January 27, 2014 (edited) Nice one, want to see results was really tempted to do it when removed my RB25DET and now kinda regret of not doing it. Are you changing the piston as compression might go down using RB26 head isint? Edited January 27, 2014 by docaam Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted January 27, 2014 Author Share Posted January 27, 2014 The pistons are the N/A pistons and they are going to stay that way. I really dont want to get custom pistons made for it. The head has been shaved and a compression test on an RB26 was 190psi on the RB26 pistons. Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted May 9, 2014 Author Share Posted May 9, 2014 Another update. Finally installed the crank and pistons. Cleaned up the head, but still need to pull the valves and lap the valve seats. I did that on my RB26 and the valve lash returned to stock, so I am going to do it on this head. Cleaning this motor has been quite a task due to a mud bath back in Oki. The ITBs still need some attention. They seem to be made of a different aluminum than the head because the head cleaned right up with simple green. The intake still is all corroded after much more scrubbing than the head. Might take some steel things in for a powder coat later, but after I leave the depot. Right now I am just getting the motor easier to store for a year. I really like the wrinkle valve cover paint. Might get them texture powder coated later like my L28 "Turbo" valve cover is. Quote Link to comment Share on other sites More sharing options...
~KnuckleDuster~ Posted May 9, 2014 Share Posted May 9, 2014 Nice! Looking good. Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted May 25, 2014 Author Share Posted May 25, 2014 Got mostly everything all together. I needed to get it sealed up before I go back in cycle. The transmission will be all back together by the weekend. Just need to get a thermostat and seal up the oilpan. Here are some pics. Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted July 4, 2014 Author Share Posted July 4, 2014 This was the process for the velocity stacks. 1 Quote Link to comment Share on other sites More sharing options...
flatrate Posted July 4, 2014 Share Posted July 4, 2014 What kind of power does a setup like this make? Quote Link to comment Share on other sites More sharing options...
docaam Posted July 4, 2014 Share Posted July 4, 2014 Great progress looks great. I have few questions why from the pics it looks like rb25 cam covers while it says rb26 head maybe I didn't get that? Or it's rb25 head with 26 ITBs. Quote Link to comment Share on other sites More sharing options...
NorwegianZED Posted July 4, 2014 Share Posted July 4, 2014 I need this what will you be selling for? Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted July 8, 2014 Author Share Posted July 8, 2014 (edited) Its a 26 head/ itbs with a set of NEO valve covers ( no PCV ). Unfortunately, I didn't have an extra set of RB26 covers laying around. The current valve covers came off my R34 after I did an RB26 swap. This head was also installed on said R34, but it was shaved for higher compression. It had a pinging issue at lower RPMs so I switched it back to an un modified head. A lot of parts on this motor are spares I had while living in Japan. The block was really the only thing I had to buy. Power is modest, but it sounds cool. Never got it dyno'd because no dynos in Oki, well at least that they let anyone use anymore. And it was never installed in a street legal, street driven car. Edited July 8, 2014 by winstonusmc Quote Link to comment Share on other sites More sharing options...
docaam Posted July 9, 2014 Share Posted July 9, 2014 Its a 26 head/ itbs with a set of NEO valve covers ( no PCV ). Unfortunately, I didn't have an extra set of RB26 covers laying around. The current valve covers came off my R34 after I did an RB26 swap. This head was also installed on said R34, but it was shaved for higher compression. It had a pinging issue at lower RPMs so I switched it back to an un modified head. A lot of parts on this motor are spares I had while living in Japan. The block was really the only thing I had to buy. Power is modest, but it sounds cool. Never got it dyno'd because no dynos in Oki, well at least that they let anyone use anymore. And it was never installed in a street legal, street driven car. Did the RB26 head easily on the 25DE block? and any specific reason for not using the 25DE head and just swapping the ITBs Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted July 9, 2014 Author Share Posted July 9, 2014 Its all bolt on, kept costs down. I chose the block due to its identical head gasket pattern. I had the spare head. And the RB26 head flows better, solid lifters for high RPM Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted July 27, 2014 Author Share Posted July 27, 2014 Decided to pull the front end and motor off of the Datsun in the past couple weeks. I am going to smooth out the bay and paint it. I would like to color match it, but I am really not sure what color I want the car in the end. I am just going to paint everything forward of the windshield gloss black. I don't think I will run any type of undercoat in thus car due to its lack of being driven in the rain. And I set the RB25 ITB motor in it just for fun and fitting purposes. Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted August 19, 2014 Author Share Posted August 19, 2014 Got my Fujitsubo header in the mail today. Quote Link to comment Share on other sites More sharing options...
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