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Found 18 results

  1. After kicking around many ideas I decided to go with an external surge tank and external pumps to feed the fuel rail of my rb25det in my 240z. I tried an intank fuel pump previously. The intank pump is the way to go for sure as long as you have adequate baffling and good general design. My problem stemmed from a poor design and using a rusty tank a buddy gave me. I started a thread on that. http://forums.hybridz.org/topic/94261-bonks-efi-fuel-tank/ I will update that thread with some lessons learned soon. Luckily I still had the original tank I pulled out of the car at the start of my project. It had a little rust, the local radiator shop was able to clean it out using acid and hot tanked it ($89). The key to my project is that there are no modifications to the stock tank. I chose to use the bcbroncos product, Accumulator Tank, ( http://www.bcbroncos.com/fuelefi.html ) scroll to the bottom the page. The tank is a converted remote oil filter. The guys at bcbroncos use this tank for their EFI conversions (if the customer does not want to spring for the intank solution). Fuel goes in the top, pass through the filter, there is a pickup tube that extends to the bottom of the filter where the fuel is picked up by the HP pump. bcbroncos added a third fitting (5/16ths) to the top of the modified oil filter to manage the return system (see tee fitting in website image). You plumb the return from the engine to one side of the tee and the return to the tank to the other side. I am feeding the surge tank with a low pressure Airtex 8016S pump. On the engine side of the surge tank is a high pressure Walbro GSL392 pump. The obvious problems with this kind of are the following: 1) Mounting everything (there aint much room) while staying away from the exhaust and the suspension and anything else that moves (rips). 2) Return Pressure Part A - there must be free flow from the fuel pressure regulator (FPR) to the tank. If the system lacks enough return capacity (adequate fuel line inside diameter), pressure can build up in the surge tank. In this case that is not an option because the tank is nothing more than a thread on filter. People have reported problems with their bcbroncos accumulator tanks leaking. I suspect that is because they did not have adequate return capacity to the tank and pressure built up inside the surge tank. 3) Return Pressure Part B* - if there is not free flow after the FPR then the HP pump has to work under load and will get HOT! = BAD for pump and WIRE! If the HP pump is working hard and getting hot then the WIRE feeding it juice is getting HOT. 4) Noise of external pumps (live with it) * - source Tony D. 1) After looking around the back of the car for a while I found a cluster of three threaded holes. I made a plate (1/8-inch) and threaded M6 hardware into the holes. I use the plate as a base to weld an extension out of some small box tubing. This was needed to move everything away from the Mustache Bar. I welded another plate to the box tubing, drilled to accept the surge tank and pump mounting plate (16-gage sheet metal). 2) After exchanging emails with Tony D, I was convinced that I needed to increase my return capacity to the tank. I already replaced the little pinner 3/16ths return line with 5/16ths when the drivetrain was out. But the stock tank has that 3/16ths return above the 5/16ths pickup. I decided to swap my usage of the 3/16ths return line with the smaller top of tank vent line (@ 5/16ths or a little bigger. At this point you simply need to make a 3 to 5/16ths adapter to plump the stock return to the vent tank. 3) After doing some research on the amp draw of the pumps and exchanging emails with Yury at Wiringspecialties.com we decided that I would be OK running both pumps over the stock 10-guage wire that runs from the back of the car near the tank (Nissan ran it back there to allow for an optional electric fuel pump on the carburated cars) to the front (Green wire). I am monitoring the wire (grabbing it to see if it gets hot) as I've running the cat over the last few weeks and have felt to heat at all. The Walbro has never gotten hot at all. The LP pump gets warmish, but not hot. 4) The Airtex pump makes a lot of noise (grumble) at idle. Can't hear it when you are underway. It doesn't bother me. Priming the system, I disconnected the power and ground to the Walbro and cycled the car in the ON position running the LP pump. I waited until I heard gas falling from the vent fitting back into the tank. I connected the HP pump back up and went for it. Damn thing started right up. Crazy. The Bad/weird part. When I shut the car off the LP pump continues to run for a second or two. I have a an inline fuel pressure gage in the engine bay. After I turn the car off it reads @ 25 psi pre-rail. After 20 minutes or so the pressure bleeds off. I am concerned this may not be good for the FPR. BUT the remnant pressure is great for one thing, starting the car back up. When I had my intank setup. I had to prime the system in the ON position everytime I started the car. Now, no need, the fires right up on the the first crank everytime. Thanks for reading. Bonk
  2. 1973 Datsun 240Z

    1973 Datsun 240Z Silver exterior, black interior RBR 17x8 and 17x9 wheels 245s up front, 275s in rear Wheels and tires are new Blended fender flares Sparco steering wheel (factory wheel also included) ~76,840 miles, and I believe the mileage is accurate. I've driven less than 300 miles since owning it. Engine is the factory 2.4L but has been modified (original owner is deceased and details are unknown). The car does run, but not well. It shows low compression on cyl 3 and 6, likely from stuck rings. I purchased a good 2.8L motor from a friends '78 to swap in to make the car run while the original engine is repaired, but haven't gotten to it. The 2.8L engine will also be included with the sale. The factory 4-speed trans is still in place. My long term goal was to swap in an RB25DET engine. I bought the engine/trans set up and a million things to go with that swap, but never got started. The interior is in excellent condition. Seats, dash, doors and headliner are nearly flawless. The exterior is similar. I have a hard time calling even a brand new car "perfect", but the paint is overall in great shape with only a few blemishes. Overall the car is a real looker (at least I think so). The engine just needs some TLC to get her running strong again. Non-smoker, always garaged at my home and stored under the car cover. Clean Texas title $10,000 obo I will also make the laundry list of RB25DET swap parts available to the buyer (if interested) with the car before listing them separately.
  3. Rb25 into Z

    So I'm having trouble picking out which conversion kit for my z but I'm stuck between two kits can someone who has done the setup suggest which kit I should get. And if anyone has used the cxracing conversion kit give me feedback on it thanks.
  4. Like the title says Q45 throttle body with TPS and pig tails $180 shipped.
  5. EMS or Coils?

    After reading the thread Coil Suggestions I have some follow up questions for the RB group, but didn’t want to hijack Blob1620’s thread. I have a very stock Series 1 rb25det swap in my s30: stock ecu, STOCK COILS, throttle body, no downpipe, 2.5-inch exhaust, freddy plenum, the intercooler is probably 50% bigger than stock, stock fuel rail, injectors, and FPR. I am currently running the boost at the stock max of 7-8 psi through a manual controller and I have a wideband. Naturally, my engine stubbles from @4500 to 6000 where AFRs plummet to 10 and the engine runs roughly. Common wisdom (Hybridz and SAU) states the ecu is retarding timing and adding fuel to preserve the engine from knock as US fuel is lower in octane. This is not a new story to the group. There are numerous changes that can be made to add power and I intend to start making those changes, but my first priority is to smooth out my rev band. I am more interested in smooth running than power at the moment. My question is this. Should my first step be to obtain a programmable ems allowing me to tune for US fuels or is replacing the coils more important? Put another way, is the rough running more a function of poor ignition performance or the fact that the fuel and timing maps are locked and meant for higher octane fuel? Thanks Bill
  6. RB25det 5spd Transmission FOR SALE

    I have 3 rb25det (Push style) gear boxes, in good working cond. $ 550 ea. Shipping & PayPal cost paid by buyer. Thank You ~ joel
  7. rb fuel sytem options

    Hey everybody. I have picked up a rb20det engine for my 71 240z which currently has the stock l24. I've been researching and planning the swap for years but still unsure about the fuel system for my carb conversion to efi. I know I have to upgrade the lines with 3/8 size return/feed lines and add an inline walbro fuel pump. I understand that i have the following options correct me if I'm wrong: !. Modify stock 240z fuel tank with a sump. 2. Replace stock tank with a 280z tank. 3. Keep stock tank but add a surge tank in the system. Which is what you guys are currently running in your setups or recommend? This car will be a weekend street car with a hp goal of 300. PS. Will I need to modify my driveshaft? I been searching and searching for a while but still unsure thank you in advance!
  8. 240z rb25det Top mount turbo

    So now that I am pretty sure I know how to use the website, I will give this one last attempt. Sorry for the spam I may have caused by trying to post a new topic from my phone. I now will only be using my computer to post lol. I just picked up my Rb25det series 2 for my 240z build. I want to upgrade the turbo and I want a top mount set up. My goal is around 350-400 whp. I want to use the garrett gt3076r turbo, but am open to other suggestions. My main issue is trying to find a decent turbo manifold to use. I DO NOT want to use an ebay manifold like the Cxracing manifold because I have heard bad reviews. (I would like good reviews if people have had experience using them however) I know that the strut tower causes some issues as well. Any suggestions for working around that? I would ideally like to spend around $1000 for a decent top mount manifold. Is going with a custom one the best route? or can anyone explain to me what setup you are using? I have tried searching, but can't seem to find exactly what I am looking for. Thanks in advance!!
  9. 1977 Datsun 280z RB25det build

    So I figured I better get this thread started or it will never get done.. so HERE IT GOES! Last October I got deployed and the whole time while I was playing in the sandbox, I was pondering of what I was going to spend my money on. At first I thought I might just do an engine swap in my Subaru Forester and make it a quick little Forester STI but after searching all of craigslist for donor cars and ideas, I laid eyes on what has always been one of my dream cars... a Datsun Roadster. Unfortunately, the owner of said vehicle never responded to my calls or emails but I was determined that my next project was going to be a Datsun and so I set out to find my diamond in the rough... This is what I found!!! A 1977 280z on Craigslist which I managed to pick up for a steal at only $4850! The previous owner bought it and had the intention of dropping a RB25det in it and restoring her, but being that he was military, he got orders over to Germany and decided to sell it instead of finishing what he started (great for me). Included in with the deal was a great deal of parts including: 1st gen RB25det engine RB25 transmission converted oil pan converted oil pickup radiator Mckinney engine and trans mounts NEW Wiring Specialties conversion wiring harness RB25det ECU intercooler and piping 2 ton engine hoist spare intercooler stock wiring harness miscellaneous stock parts full unknown fiberglass body kit 2 sets of bumpers original NISSAN 77' service manual original NISSAN fuel injection manual full original interior First thing I want to do is get the car cleaned up and ready for the new power-plant. luckily, the previous owner had the same idea and he had already cleaned up most of the engine bay. Unfortunately, he also laid down some undercoating in the engine bay which I want to remove and spray with some rust preventative and smooth it out some more. As for the engine, I have already started to remove and label most of the external components so I can clean, inspect, and upgrade. I currently have a Greddy style intake, and lighter exhaust manifold on the way. both of which will be powder coated. OH! and look what I found in the glove box! a mint condition original shift knob, anyone need one?
  10. CIMG2526

    From the album "Christine"

  11. Hi Guys, I'm going to be in LA from 4th December 2014 to the 8th December 2014. I am willing to travel upto 400 miles from LA. I am interested in modified z's and un modified z's. I preffer the zg arches with wide wheels look but anything considered. I am looking for rust free examples complete or incomplete. I would preffer turbo converted cars but a well sorted N/A is also an option. The cars (I'm looking at buying two maybe three) will be shipped back to the UK. The cars will be collected by the shipping company in my presence, Cash or wire transfer will be the method of payment My private email is [email protected] I will require a fair bit of information about each car and will need to see deatiled photos. Cheers guys and I hope to here from you soon. Adam
  12. Build options

    Alright I just want to start by saying that I'm still very new in learning about the S30(Datsun 280Z). I've been reading up on this car and things about it as much as I can. With that being said I need help and will continue to look for answers(searching) apart from this thread. Not sure where to start and looking for advice. I think with everything I have in mind not looking at all the prices yet. The budget for my car that i plan to keep until I'm old and senile would probably be closer to the $20k-$30k. Unexpected problems/costs. I will be getting the car this Sunday the 17th of August. what I think is the proper way in going about this build would be first to strip down to the bare frame and doors and hood and get it sent off to be sand blasted or media blasted whichever is better. Not sure on that. Second would be to get camber plates welded in so handling is a little better. Next I assume would be to get some sort of roll cage put in. Need more info on cages before deciding to do it before getting painted. Next steps I'm not to sure on... I want to do an RB25det or RB26dett depending on a few things. One how much money would it be to find one. found an RB25 for 1200 with ecu wiring transmission on CL(no RB26 on CL). Two would be how well would the engine sit in the bay? Would it throw off the distribution of weight very badly? Is there something I'm missing? I know I would need to get custom engine mounts made. Should I build the engine how I want(400-450whp) before dropping it in the car or build it once its in the car? I know theses can handle up in to the 600hp range without any internal mods. With building an engine comes with fuel upgrades that I will have to read up on. I'm not too sure what to do as far as transmission goes because I want one that can handle the 400-450whp without breaking synchros very much or case flexing. I've thought about going automatic but I enjoy driving manual too much to do that. I know I'm missing information on other key things like a differential and stuff but this is all I know for now... I plan on upgrading some of the electronics like gauges and audio not to familiar with it really but I will be I want to build and do as much as I can on my own or with help. I do want to keep the original gauges and get some extra gauges in there. I also plan on replacing the speakers and running a Subwoofer with two amps one for the door speakers and tweeters and one solo for the Sub that will be mounted into the back sort of molded into the car not really in a box. I will be upgrading the seats so that I will have some sort of seat harness so i Dont fly if I ever wreck it(and rebuild). I want to get the AZC brake setup looks nice read awesome reviews and not many people have done rebuilds on them. I want to lastly want the floor to be carpeted and leather doors. I know I don't have all the information and have never built a car and I apologize if this thread upsets some people "just look up everything yourself its out there" I want someone else s ideas besides mine so I can learn and see what others think. I'm building this car like this because if I can do this and finish then I'm going to into this field of customization.
  13. Hi there i have looked a bit everyone and dont know quite whats wrong and how to get my speedo working. My dash cluster is new and 100% working. But still my speedo doesnt move i was told its due to having a rb20det tranny which uses a mechanical speedo while the cars rb25 requires an electrical speedo. I was told that by putting in a rb20e r33 speedo drive would resolve this . Im not too sure on how accurate this is and Id like any tips or ways to resolve the issue. Preferably not too expensive. Im sure many people have done this b4 looking for how to get the speedo working again . (NOTE : previous owners dropped the 20det gbox in , i was told its a small issue but more i looked into it after buying most mechanics have suggested putting in a rb25det bigbox, i dont see the need as the gbox is tight and strong and I am running no modes all stock factory 100,000kms. engine 60,000km tranny )
  14. R33 T28

    From the album New Parts

  15. Found some free time this weekend, so decided to put the motor in my Z. Here are some pics, not quite there but the the heavy work is done.
  16. Do not buy from CXRacing

    Just to forewarn anyone out there that is tempted by CXracing's "deals". I will share my recent experience with this worthless excuse of a company. First off, I will start with a bit of my backround in the automotive world... I have been building custom cars and motorcycles for over 25 years. I am far from new to the fabricating/aftermarket performance scene. I have a lot of experience buying and selling performance parts. I even ran a shop for a few years where I was in charge of ordering from and setting up accounts with aftermarket vendors. My 260Z is my baby and sometimes, when money is short but the desire is there, I have gone cheap but not without doing a little research first. I checked out CXracing and even bought a surge tank and an intercooler from them to check their quality. I have heard that all they sell is Chinese garbage and until my most recent purchase, I didn't have any complaints. I've owned my 260z for 15 years and I have done a great deal of custom work and upgrades to her. I performed my RB25DET swap over a year ago and I have been daily driving it ever since. I was a little disappointed by the dyno results so I decided to shoot for more HP. I ordered CXracing's RB25DET S30 turbo kit minus the mounts/intercooler since my car was already set up and I requested to swap the GT35 for their GT3071R. This is what I should have received... GT3071r ball bearing turbo with oil feed/drain lines, oil fittings, coolant fittings, 4 bolt to v-band adapter, manifold w/welded wastegate flange, 3" downpipe, and a 38mm wastegate. What I received was a GT3071r turbo with severe shaft play (the wheel hits the compressor housing), 24" feed line that won't fit unless it is routed in between and resting on the header tubes, incorrect oil feed and drain fittings (They sent me gt35 fittings not the gt3071r), the drain hose was correct but it's hard to screw that up, no coolant fittings/lines at all, no 4 bolt to v-band adapter, no wastegate flange welded to the manifold, 3" downpipe that wasn't even close to fitting (if my engine was 9" lower and 5" more towards the radiator it would work but that's impossible) and a 38mm wastegate that was so large the v-band clamp at the back of the turbo hits the vacuum port on the wastegate (after I had the flange welded on, of course). From what I have witnessed, the quality control department over at CXRacing doesn't exist and obviously the knowledge of what they are selling is lacking as well. If someone would have taken an extra 30 seconds to check what was going with what for my application, I wouldn't be writing this. Actually, if someone would have contacted me back after I left multiple messages (weeks ago) regarding these issues, I wouldn't have wrote this. The day I received the package I left messages with their sales department, tech department, my sales person and Kevin (I was told he was the man in charge) with absolutely no response from anyone. The guys at CXracing will answer all of your questions and help you any way they can until you pay them. Once they get your money, you can say goodbye to any service. Basically, they will take your money and send you some parts that might or might not work on your car. What doesn't work or was left out of the box, you are responsible for replacing. They do not stand behind what they sell unless there is a possibility of negative feedback on Ebay and that will only last until the feedback window is closed. I learned the "you get what you pay for" lesson years and years ago. I decided to give them a shot because of a recommendation from someone I know. Of course, they only bought an intercooler. I am hoping that no one else here or anywhere else makes the mistake of buying from this company.
  17. Hello everyone! This is my first time posting here at HZ. Last month I picked up a 280z with the stock 80k mile L28 and auto tranny. Obviously thats not gonna fly with me hahah. Im planning a winter build of a RB25DET swap. I know there are many build threads to read but I have one question. How does the RB's transmission fit? Are there any recommended motor mounts that help make the transmission fit with the stock driveshaft? or fit betting inside? Thanks guys, I love this community already -Nate
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