ynhrgt

Not so sound idiotic, but couldn't I just copy this... I really could use a diagram if you could draw one up.

I understand that much. But this is a bit different from what warpspeed mentioned as in the bypass valve would remain open during full throttle, partial throttle and even at idle (fully closed). With yours, why would the bypass valve be closed during hard accelleration? Wouldn't that defeat the whole purpose of the supercharger using its own charge of air to power itself? I mean basically I was told the bypass should stay open pretty much all the time, the only change would be how much it would open by. Your saying it should be closed at full idle (fully closed)? I plan on using as large a wastegate as I can get my hands on. If you can include some sort of diagram into this or draw a crude one that would be great. I know I'm making progress here but lol its a bit difficult to understand.

That didn't make any sense.

With the increase in displacement obvious, are there any disadvantages to using an rb30? I've heard with an rb26 head, the ability to rev is lowered substantially. Would this still be the case if the crankshaft, etc.. all were machined, counterbalanced, etc...

I'm beginning to understand what your saying here, and I have a "very rough" idea of what your talking about here. Basically your saying, the supercharger will not take any power if it re-circulates the air it creates back into itself, thus it would spool itself up. This way it doesn't suckup power from the drivebelt. Could you possibly draw a diagram to better explain this? I mean understand the use of a wastegate as a bypass valve, but exactly how would the supercharger outlet be re-circulated back into the inlet? I'm a bit confused on this one. So if this bypass valve needs to OPEN when the throttle closes so you don't blow a hole in your engine, and it needs to be OPEN to re-circulate the air the supercharger makes back into the supercharger itself.. then why do you need to use a bypass valve period? I mean couldn't you just make a pipe that does both? Sorry if that doesn't make sense.

Warpspeed, you truly are the man to talk to regarding this. Again, excuse my ignorance.. but by bypass system, you mean something like a blow-off valve or re-circulating bov? So if I'm understanding this correctly, and I'm seriously trying to.. it would look something like this Two Pod Air Filters >> Turbo + Turbo >> Supercharger >> Blow Off Valve >> Intake ?? Basically, air will go into two air filters for the twin turbos, then the twin turbos will spin and push the air into the supercharger (which spools very quick) then it will blow all of that into the intake. And if the throttle gets cut off, the air would get pushed back through a blow off valve or re-circulating blow off valve. My other question when the turbos are spinning really fast and producing a lot of pressure, exactly wouldn't that affect the supercharger? I mean since the supercharger is blocking the flow sort of? One thing I have in doubt is.. exactly HOW would the supercharger NOT take away power? Its still connected to the belt. And what do you mean by it would unload the supercharger at partial throttle? I need a bit of clarifications on this heh. Besides Opcon Autorotor, are there any other good twin-screw superchargers?

Can you elaborate on this? I'm not quite what you mean by turbo outlet into a blower inlet.

Has anybody on this forum ever supercharged a RB26 shortblock? If so could you share some information on making custom brackets to mount it onto an RB26? I'm trying to save myself sometime here, I'm doing the custom piping work myself eventually.. just wondering if anybody knows how to mount a supercharger onto an rb26 and retain at least the factory power steering, even better the a/c as well.

I'm doing a fair bit of research, and I ask a question yesterday regarding twincharging but I guess nobody knew the answer to. I'll ask a more general question however, can anybody suggest how the supercharger would disconnect after the engine hits a certain rpm so the larger turbo(s) can take over? I've heard things like using a by-pass valve, but wouldn't the supercharger suckup horsepower since its still connected to the drivebelt? I've also heard somebody suggesting an advanced pulley system lol.. I don't think it needs to resort to that but if it must. I know all this sounds complex, but if anybody could offer some suggestions.

If I told you where I stand, you would probably die laughing. I have "general" automotive experience, I know enough to know not to say something or do something stupid most of the time. Right now, I'm in the process of obtaining a very low mileage GT-R from a local dealer, i will probably pick one up in the fall. The company I'm buying from is advising a basic engine rebuild, since most japanese motors are pretty ragged on, not to mention I live in Canada and japanese parts arent exactly dirt cheap if things do break. I *KNOW* i'm 10 steps ahead of myself here, but I'd like to know where to begin in terms of putting a supercharger on an RB26DETT. I am also well aware I won't see much in terms of performance on a stock block, which is why when the engine goes in for a rebuild, I would like to bolt in a supercharger in as well. All I know is the following, and please don't laugh.. but I'm sure as hell determined to make it work. #1 Picking a supercharger (twinscrew, roots, centrifugal) i've chosen centrifugal, but i've heard twinscrew is better. Is there a particular supercharger thats good? Obviously I'm not looking for horsepower potential, I'm looking for something that spools extremely quick #2 Mounting - Exactly how would I go abouts starting to mount a supercharger? I know I have to take measurements here, etc.. I'll have the help of a shop, and a few guys who know a couple thigns about turbos I hope. #3 Piping? I've seen a few diagrams of how it should look like, can somebody point me to one? Also, about the whole supercharger cut off, exactly how does that work? I mean once a supercharger hits full boost and brings the revs up to 5-6k.. exactly how does one get it to shut off so the turbos can take over? I know this setup shouldn't be rediculous to build, its just more of a pain in the butt. I just need some general guidance. BTW, Stocky do you have an IM of any kind, MSN, AIM or ICQ? I do'nt want to pester you but I've read some of your previous posts, you know your shit. Same as that Warpspeed guy.

I've done too many searches on the web regarding twinchargin the RB26DETT. I've read everything from the complex pipe work, blower choice, etc etc etc... Its giving me a bit of a terrible headache. I would like to know who has actually DONE the setup, does anybody have an actual link to anybody who has finished a RB26DETT(S) setup? I mean if its been done already, couldn't the mounting brackets be duplicated for simplicity? Forgive my frustrations.