Thanks for telling me about the Megasquirt. I don't mind assembly, and it seems like there is a lot of support for it. I never had to go for SAFC with my truck, that's why I don't know about this SAFC stuff. The truck has a Hypertech chip and 4.ll rear gears. 6/4 drop rolling on Billet Specialties rims wrapped in Toyo Proxes with a Z speed rating. The original owner had the rev limiter taken care of before I bought it.

 

A stock 87 TII has 182hp. Given that the stock 87 TII has a turbo that is more efficient than a supercharger, and it also has an intercooler, your output would be closer to 170hp at the same boost level. Sorry, but even if you pull this off, that turbo 300Z with nitrous is going to destroy you. I recommend stopping the project while you still have a car that runs, and salvaging as much as your reputation as possible while you are still able.

If you like working on your car, and you like superchargers, read this:
http://store.motolit.com/motolit/837601681.html
You can buy it at just about every online book store, and your local book store can order it.

This will hold you over until the book arrives:
http://www.superchargersonline.com/c...at.asp?group=2

And finally, here is a test...

A true friend:
A) Tells you what you need to hear.
B) Tells you what you want to hear.

Most people would choose A.

 

Why are you converting to carb anyhow? it personally seems like youre making this harder then it has to be?

 

How much boost would I be safe putting into my car? There has got to be a chance in hell for me to beat the Z.
I'm going with the Megasquirt SAFC.

 

Im going with Apexi safc2, im halfway through the eaton M90 SC'ing project, i wouldnt put over 8psi in... aaroncake is running 10 or 12 psi (i think) with his high compression motor, but he really knows his ****, and he has a turbo. Im not going to go over 8psi i think.

 

I don't think putting on an M90 is going to keep up with the car that you are describing.

 

DEZERTE- are you going to use a Intercooler?

 

Can you say that in a more understandable way?

 

How about I tell you what I'm doing in a more understandable way?

I have a street ported engine. I am going to use a Megasquirter SAFC. I am doing away with the stock intake and TB. I am adding a M-90 blower. I will dyno tune it.

 

What FMU ratio and injectors would work for me?

 

OK, these are two completely different things. A Megasquirt is a DIY fuel-only EFI computer that you have to build yourself. It is not a project recommended for amateurs. An S-AFC is an interceptor-type fuel controller, which I described above. Unless you have the cash for a full aftermarket EMS, this is the best choice for you for this project.

 

Possible impedance issue with the stock ecm. Also, the TBird injectors are insufficent for the flow rate you will need. T2s may work better in your application.

 

I dont know yet...i need to be innovative, i dont want to use the T2 tmic/uim.

 

edit

 

>>As we all know rotarys are prone to detonation, especially forced induction.

Actually no. In NA form they tend not to have detonation problems. You can't even buy gas of insufficient octane for an NA rotary.

rotarygod - the Eaton is a roots blower. Blow through is not an option. (and carbs aren't as bad as you think)

 

I know it is a roots blower. You obviously didn't see how Zbrown ran his setup. It is a blow through. It can be done.

I also know carbs can work well when set up properly. However he is way ahead when it comes to the amount of work involved if he just keeps the stock manifold and does some ecu work instead.

 

I want you guys to check out this idea. Use the stock lower and and upper intakes. Make an adapter for the the blower out of the plenum. The plenum would be cut about 2 cm above where it mounts to the intake. This is the lowest point of the passage for the secondary port that comes in from the TB.

I hope that makes sense. I will be making a flange out of 3/8" aluminum. Then the flange will have holes drilled allowing it to mount to the blower. The adapter will be ported on the inner surfaces. This will allow a nice smooth transition from blower to intake.

I will post pictures when I have it done. Thinking about an intercooler in a bottle: a little bit of nitrous to cool the charge.

 

yes, but when you put a supercharger on an na, its not an na anymore

 

N/A engines have a higher compresion ratio regardless of them being left N/A or if they have been converted to foced induction. You could look at it the same way if someone where to use N/A rotors in a Turbo II rebuild, because the compresion ratio would be higher.


Now then, I want to get everones thought here. As we know running premix has it's advantages and disadvantages. I was thinking that premix may be an advantage to forced induction in general. I read in a thread about premix that N/A engines run better on low octane fuels. In the same thread it was said that the premix lowered the octane. I do not think this is true. It seems to me that premix would take longer to burn, meaning it would raise the octane.


As far as it being an advantage in forced induction, I was thinking mainly in terms of octane. Then another thought hit me, if you were were running a carb draw through system premix would help lube the rotors in a roots type blower. I think draw through carb systems on centrifical superchargers or turbo systems would see more problems than advantages. The disadvantages are that they are prone to fuel puddling, this would only be worsened by the oil. Centrifical superchargers are more suitable with a blow through carb setup, so there would be no special advantage to running premix on them, besides what is typically discussed.

Anyone have any thoughts on this??


I just got the sudden feeling that this thread is about to get a little longer............

 

"Tump" is such a dumb sounding word.
Anyway, converting to carb seems so troublesome, ill never do that probably >_<,

 

Thread cleaned up. I was in a good mood, so no one got warnings. If it happens again, proper warnings will be issued, thread will be closed.

 

Funny how this mod always seems to take care of these NA thread, while a lot of the other stuff gets pretty rampant...

*go figure*


-Ted

 

Feel free to use the "Report To Moderator" button whenever you feel is necessary. I can't read every single thread posted...I've said this before....

This is also off topic for this thread. Proper procedure would have been to post to the Suggestions forum, or to PM me with your concerns.

Thanks.

 

Rotarygod-

Yes, I did see zbrown's setup. I don't know if he doesn't realize the flaw in this design, or simply does not care. You do understand what the difference between a positive displacement compressor and a dynamic compressor is, right? I guess not. Okay - zbrown's roots blower is gulping air at full atmospheric pressure ALL THE TIME. The throttle is restrcting how much can make it to the engine. What happens to the rest? His blow off valve must be screaming like a banshee as he cruises down the highway, venting off god know what kind of pressure he's building up. Wonder what his gas mileage is like at this point? Oh, that's right - must be from all that power.
This problem would not occur with a dynamic compressor.

 

>>As we all know rotarys are prone to detonation, especially forced induction.


Read it again. The way it is worded, it means that all rotaries are prone to detonation, especially (ie moreso) with forced induction. Semantics - not sure what he meant, but what he actually said was incorrect, and a popular misconception.