Motor build date code? LONG

[TurboSouthAfrican]

Hey guys, second post here, new to the 240 world and RB world. I am looking to do a built motor in a couple of weeks. First question is, are all the RB25DET interchangeable, same electronics etc. What I am trying to do is buy a second motor and build a motor that will be able to handle 600rwhp and then put in the 240 that already has the motor in it, I just want to be sure that wiring would not have to be changed due to changes in the motors over years. Where is build date on motor?

I plan on running a AEM with a HY35 I have sitting around to start. Aslo getting Greddy intake mani and bigger injectors, but I still need a good line on after market exhaust manifold. Anyone on board no of anyone who builds them custom, please let me know. Any info on rods, pistons etc would be greatly appreciated, where to buy, that is. Can these motors be bored over 40 thousands without any problems, worried about thin walls, like I said new to these motors, wow, I am probably going to get flamed. I did search by the way.

Lastly I would like to get a full port and polish job but I want to send to someone who is familiar with these heads. Thanks guys

Larry
Modified by TurboSouthAfrican at 7:23 PM 6/27/2007

[Shocker]

lol..

Well I suppose its a plus that you actually can spell and make full sentences...

rb25 s1 and s2 are pretty much interchangeable minus the TPS, coil packs, ign... might be missing a few items but those are the mains.

port and polish go to someone familiar with DOHC turbo motors....

240 is going to need some serious work before 600rwhp is achieved.. IE brakes, suspension, tires, cage, stiffining.. so on... that should get you started... there is much more you can search its out there.

[blurrbosi]

^No cage, mabye some poly bushings lol.

[Darius]

If you want the electronics to be fully interchangeable without rewiring anything when you switch the motors around, make sure you either have two Series1 or Series2 engines. Series 1 came first, but maybe someone can fill in the production dates. The easiest way to tell is by looking at the TPS, S1 has 1 plug and S2 has 2 plugs.

Boring the cylinders .040" will get you slightly less than an 87mm piston diameter, which has been established as a "rule of thumb" for the maximum bore you want to run. Anything more will create thin cylinder walls. Head gaskets (don't cheap out and buy Cometic) and pistons are readily available for the RB25DET in this diameter, so no worries there.

Search for a thread created by CursedGTR and you will run into the RB26DETT port and polish job that he had done. Maybe you can shoot him an e-mail to ask who did it, because I believe they used a CNC machine and it looks immaculate!

Exhaust manifold is something you'll have to research because it all depends on how much you want to spend and what level of quality you're ready to settle for. In florida, I would imagine that it would be easy to find a tuner shop semi-close that has done them before. Central Florida Turbo comes to mind.

[TurboSouthAfrican]

If you want the electronics to be fully interchangeable without rewiring anything when you switch the motors around, make sure you either have two Series1 or Series2 engines. Series 1 came first, but maybe someone can fill in the production dates. The easiest way to tell is by looking at the TPS, S1 has 1 plug and S2 has 2 plugs.

Boring the cylinders .040" will get you slightly less than an 87mm piston diameter, which has been established as a "rule of thumb" for the maximum bore you want to run. Anything more will create thin cylinder walls. Head gaskets (don't cheap out and buy Cometic) and pistons are readily available for the RB25DET in this diameter, so no worries there.

Search for a thread created by CursedGTR and you will run into the RB26DETT port and polish job that he had done. Maybe you can shoot him an e-mail to ask who did it, because I believe they used a CNC machine and it looks immaculate!

Exhaust manifold is something you'll have to research because it all depends on how much you want to spend and what level of quality you're ready to settle for. In florida, I would imagine that it would be easy to find a tuner shop semi-close that has done them before. Central Florida Turbo comes to mind.

Thanks Daruis, you have been a great help. Thats all I wanted, nothing about cages, brakes.......

[Darius]

If you go with a cage, you are getting into a whole different safety situation where the car will almost exclusively have to be run on a track with a helmet, with a new harness, seat, etc. Let's stay away from that if you can. You wouldn't want to get into an accident with a roll cage in your car and the standard 3-point harness and seat. Your head would smash into the cage and we don't want that.

Brakes are a bonus upgrade and I would refer you to the STICKY at the top of the 240sx forum here. There is a huge writeup on how to do the Z32 brake upgrade and what is needed along with other options such as the Q45 brake upgrade.

[Darius]

Dammit, I went to edit and accidentally hit reply.
Modified by Darius at 2:13 PM 6/28/2007

[blurrbosi]

lol dual post

[TurboSouthAfrican]

Car is pretty much sorted. I have 300zx BBK upfront and regular 300z's disks outback. It has a high vol. fuel pump. Car is lowered and handles decent. I am not looking for a track car, my main goal is to kill a friend of mines Corvette. He never stops talking sh$t!!! I have a 2001 M3 with alot of work done to it but turbo charging it to beat the Vet is not something I am willing to spend. Turbo kit for my car cost $16000.00 yes that is right 16 g's. That is the only reason I bought this car, I have come to love it in the short time I have had it, fun car. Thanks again, I am sure before the day is out, I will probably have another question, thanks again.

Larry

[Shocker]

Car is pretty much sorted. I have 300zx BBK upfront and regular 300z's disks outback. It has a high vol. fuel pump. Car is lowered and handles decent. I am not looking for a track car, my main goal is to kill a friend of mines Corvette. He never stops talking sh$t!!! I have a 2001 M3 with alot of work done to it but turbo charging it to beat the Vet is not something I am willing to spend. Turbo kit for my car cost $16000.00 yes that is right 16 g's. That is the only reason I bought this car, I have come to love it in the short time I have had it, fun car. Thanks again, I am sure before the day is out, I will probably have another question, thanks again.

Larry

$16000 for a turbo kit? .. better come with a head job and some low compression forgies..

Not to try and sway you but RB motors don't exactly have "kits" its pretty much all custom unless you have serious money for an old HKS kit that are used and still cost like 4000 + grand.. Most of which don't support huge HP numbers w/o a great deal of boost. Dont come with an ECU or generally intercooler setups...

Your basically doing the same thing to an RB motor as you would have with the m3. I6 and an I6....

Im just getting done with a bigger single setup and have spent almost 8 grand in motor parts this winter, and its still not finished... All of which is pretty much custom. Full exhaust is custom by me, along with all the IC pipes, dump/dump tube, wiring ect...

So if your looking for "bolt" on kits RB series motors in 240sx's arn't exactly it. Unless you plan to spend big money at a shop for them to make you everything, I'd give it some serious thought before jumping into it....

[TurboSouthAfrican]

Hey Shocker

It is certainly crazy to pay 16 k for a turbo kit but people do, check out this site http://www.horsepowerfreaks.co...F_750 . I belong to a site called E46fanatics.com and guys there seem to be lining up to get their hands on this kit, ok, I am exaggerating a little but still. I decided to keep the M3 as a weekend car but no more mods.

I am not new to the turbo world so I know what it takes to put power to the ground. I have 386 rwhp Merkur XR4Ti that has been a love, hate relationship, currently in a million pieces. I have access to my friends shop who works on Porches and Ferrari's. I will do fab work, not a problem, up to a point. I said 600rwhp but actually, just enough power to blow my buddies Vet out of the water. I know 450rwhp would do it but I have never had a car that made over 500rwhp and would love to rub in my friends face just for being a d!ck. Thanks for all the info, I am sure I will make one of you guys mad with a newbie question before too long. I will search before I cry wolf. Take care

Larry
Modified by TurboSouthAfrican at 10:13 AM 6/29/2007

[Darius]

Not to rip on hp-freaks or anything, but they have higher prices for the same stuff that everybody else sells so I have never purchased from them. $16,000 for all of that is insane. With that pricing, I could get a full-race exhaust manifold, GT35R, dual wastegates, and a custom downpipe and still have money left for about 10 years of gasoline.

Second, they claim 750 whp on 750cc injectors... Good luck with that one. I'm guessing they are running at about 100% injector duty on the top end, which IMO is retarded.

[TurboSouthAfrican]

I agree Darius. If you look around for turbo kits for the E46 Beemers, you just don't find anything of high quality or that puts bigger no's down. HPFreaks intake manifold is a work of art, maybe that is why they are charging artsy prices. The kit comes with everything upgraded fuel system, standalone ECU, injectors....blah,blah,blah....for the low, low price of $16000.00

I thought about supercharging but the cheapest kit I found was $7000, most you see for around $10000.oo F@#$ing crazy!!! I might add that for that $7000 might see only 400 rwhp, that is why I bought my car. Bang for the buck and to my surprise is really fun to drive with a body style that has stood up to newer cars.