Dont think this has been covered yet but... I've been looking at that pic of the engine bay Greg has posted on CustomMaxima.com of the turbo'd 4th Gen....and it looks like you could fit an SC and a turbo in the engine with little hassle!! With an IC set-up included...the turbo piping would use the IC (right now my SC is using the IC) and you could just make a custom CAI for the SC that goes down into the passenger side fender well ...with the current SC setup from Stillen you have that long CAI piping stretching across the engine bay which really isnt necessary if you needed extra room you could just go with the custom CAI thats smaller... For those of you who are familiar with the SC and the Turbo setups, there are definately possibilities there...
Now lets assume an SC & a Turbo will fit... will it or wont it work and why or why not? Look at that turbo'd 4th gen pic on custommaxima and you'll see there's still space for the SC... Hmmmmmmm Just a thought... but does anyone know anything about this?

Deac

 

redundant systems.

the main reason why people SC a TURBO is so that one can spool up the other one faster, but in our case, having a supercharger spinning the drive pulley and then feeding air into the Turbo's inlet has no point because that turbine will be might be slowed down due to back pressure. then you have to deal with where to put the BOV and having two safety valves and such.

i mean. realistically speaking, SCin' a turbo would be kinda lame, especially if you get an underdrive pulley with that turbo kit, then you can spool up even faster to max boost...

 

Sure you could do it, have the piping join together before the tb..... question is... The opening is only so big for the tb and your motor can only handle so much boost. You could reach that max amount of boost b4 you blow the motor just with a tiny pully, or high boost on the turbo........ Seems to me the money would be better spent building up a stronger motor.

 

its much easier to do Twin Turbo than to do SC and Turbo.. that way you can have a smaller turbo for low rpms and bigger turbo for higher rpms

 

 

 

Just wondering, but would that be considered sequential turbocharging, if the smaller turbo "feeds" the larger turbo?

Doesn't the Supra have equal size sequential turbochargers, whereas the 300Z has equal size twin turbochargers?

 

Im sure you guys know that the reason for doing both is to obtain boost at all RPM and the SC can provide boost up to say 3500 RPM and then the turbo kicks in.... at least thats why the did it on the
Lancia group b's back in like 85. and i have seen an ITR in a mag with both and it was pushing almost 400hp and it had stock internals, but who knows how much the vq can take. but this is actually a good idea, youd do good autocrossing. but i think thats right. but if not dont flame. i cant work on cars.

 

Ummm.

The SC doesn't even start putting out boost until 4000RPM.

With a 2.66" Pulley, 2500RPM.

As i understand it.

A Vortech/Stillen Supercharger for the Maxima helps very little on low end.

 

A "SUBO" sound good to me!!

 

I'm in boost under 2000 rpms (2.87").

 

Really!?!?

Then why am I not hitting boost until 3.5k with a 3.25"!?!?!

Man, that makes me feel like i still have more problems!

IanS

 

Kev don't get him started. He's sensitive that way.

 

If any one finds out for sure let me know. It sounds like there is too much confusion regarding this topic. That would be so tight if it worked though.

 

MUST....HAVE......MORE........POWER!!!!

 

Sorry, I should've kept my mouth shut.

Hehehe

 

OK, please at least just tell me when boost should kick in with a 3.25" Pulley on an AT.

Man..maybe that will be my next Mod...a smaller pulley.

What do you have going to prevent detonation or problems with the smaller pulley?

IanS

 

I start boosting between 2100-2400 with the 3.25... around 2000 (tad under) with 3.125...

I have water injection to prevent detonation. DanNY aluminum pulleys to prevent meltdown.

 

Well... if we're gting into low-end and then high end boost, it should work if you have an SC pulley that allows the SC to kick in around 2000 rpm or less then the turbo would kick in at around 4000 to 4500... then it would make more sense to SC a turbo. But lets not forget about the "deltagate external wastegate" thats said to come with the new bolt-on turbo kit!! Isn't the function of this device to allow the turbo to spool up faster and at lower RPM?!?!? If this is the case, then the SC would not be needed unless the SC provided for more low end torque and quicker acceleration on the low end than the wastegate.... if so substitute the SC for the wastegate! Hmmmm... more food for thought!!!

Deac

 

I don't get it. If you're running a small pulley so that supercharger boost kicks in at low rpm, then you are going to be making more boost at high rpm as well, maybe more than you can handle without stuff like water injection to prevent detonation. So why would you need or want turbo as well? How could you handle the extra boost that the turbo produces over what the SC is providing?

 

I think this is your answer right here. The "weak link" is not the turbo/SC its your engine. You can always increase bost, but the engine/tranny seems to be the weak link.

I always liked the turbo setup with NO2 until it spools up.

 

if you are running acceptable amounts of boost from both the SC and the Turbo, your engine or tranny should'nt be in jeopardy... I've been running 9psi w/my SC and there are guys who have safely run 10 or 11psi so far which start your SC boost at around 2k rpms and from what I understand, the turbo-kit run 9psi of turbo-boost. If you are still within the safe limits, should'nt you still be ok or are there still other drawbacks?... I'm still trying to get feedback is all...

Deac

 

Doesn't the turbo boost add to what the SC is producing? In which case you would be up around 18-20 psi at high rpm. What am I not understanding here? Are you staging the boost somehow, like with a relief valve, so that the SC boost is replaced with turbo boost at high rpm?

 

with the Lancias, i think they had it so that the SC puts out boost, and then it somehow stops i believe, but im no mechanic, and then the turbo kicks in. of course the SC will have to be set up specially for such an application, that way boost is made easier, and i think they used big turbos to make more power at higher RPM, with the SC to eliminate lag, so really thats what the SC does... so unless u r racing, it may not be the way to go.. but it has been done for like 20 years, and its apparently a really good idea if you have it built right. Look in Super Street issue with the burgundy integra on the cover. it can make 345 hp all day on stock internals, and like 400 and something on max boost. if i had the cash id do it..........