Supercharger for Y33 (FGY33, FY33, 97-01 Q45, Q41, supercharged, turbocharged)

[97Q45t]

That's it! I'm tired of going as fast as a Civic Si all the time. So I was talking with a friend at school about a custom supercharger system for my car and he said he'd help me on the fabrication of the bracket and more. However, I have absolutely no knowledge about force induction. My general question is:

Do I need anything else beside the following?1. Compressor2. Misc. hardwares (hoses, pipes, braket, drive belt, etc)3. Modified ECU

[radride]

You will also need a:

-intercooler-blow off valve-either a fmu (fuel modulating unit) or a rising rate fuel pressure regulater (increases fuel pressure by 1 psi per 1 psi of boost)-piping-obviously the blower (supercharger)-possibly a bigger fuel pump or a secondary pump

as for the ecu its really not that nessary. When I superchargered my 98 Maxima using the Stillen kit I didn't have to modify the ecu as there was extra fuel due to secondary fuel pump (300zx tt pump; it came in the kit) and the fmu. It ran great. It was nice because it ran low boost therefore you don't really need to adjust timing or anything like that. A after market ecu could of maybe extracted another 10hp but it wasn't realy worth it.

Good luck on the project and let us know how its going. I would be interested as well. Also don't run too much boost. Just try to keep it to 5 psi. That will still net you close to 380hp on the stock motor.

R.K.

[elwesso]

Duy, maybe the G50 supercharger could be made to work. i wonder if the heads are different. Remember on JDM VH41s they used the spider intake manifold

[maxnix]

Damn, I thought you had the 4.08.

Why not go totally outlaw and drop in a VH45DE?

[Q_SHIP]

I say just wait for the ECU and see if that works for you before you dump money on a SC.

[Q45tech]

a rising rate fuel pressure regulater (increases fuel pressure by 1 psi per 1 psi of boost)

WRONG! EACH PSI is 6.8% more density therefore you need *4- 5 -6 psi FUEL pressure rise per PSI of Boost.

* depending on temperature rise per PSI of boost............this method limits you to 5-6 psi of boost before the injectors become unreliable at the higher pressure..............Most just reprogram ecu but Nissan Q ecu has no way to sense exact boost pressure so they just compromise with an open time based on a guess................as the MAF voltage cannot rise enough to reflect true air density. The stock MAF tops out at 3-4 psi boost........20-25% more fuel.

SO between a rising rate FPCU and MAF [recurving at ecu] you can get decent control up to 400-440 flywheel HP less the parasitic drag of supercharger.........................380-420 HP.............330 RWHP.

[97Q45t]

Oh... it seems way more complicated than I thought. 380-400 bhp seems a bit low compared to the efforts. I wonder if the 1/4 time would drop down to mid 13s. If not than I just get a 98-99 XJR and call it a day.

The 4.08 is not helping much. It's like a teaser.

Wes, how is your supercharge project going? Any update? How does the compressor look like?

[elwesso]

We wiill have to find out if the VH45 intake will bolt onto the VH41, if it will, i dont see why this setup couldnt be modified lightly to fit the VH41.. however, especially from a tuning aspect, itd be nice to have OBDI where we could repgrogram everything at the ECU, rather than running a piggy back ECU like a GReddy emanage or S-AFC or something like that... which is what you would want to do with a Y33 OBDII setup....

dont make this harder than it has to be!! The supercharger is READY to go for anyone whos serious.

[BlueC]

We wiill have to find out if the VH45 intake will bolt onto the VH41, if it will, i dont see why this setup couldnt be modified lightly to fit the VH41.. however, especially from a tuning aspect, itd be nice to have OBDI where we could repgrogram everything at the ECU, rather than running a piggy back ECU like a GReddy emanage or S-AFC or something like that... which is what you would want to do with a Y33 OBDII setup....

dont make this harder than it has to be!! The supercharger is READY to go for anyone whos serious.

Is that a VH45DE w/ a blower? More pics and info!

Id love to have a low boost S/C setup on my VH41DE sometime in the future. Just enough to give it a nice "kick" for when needed.

[Q45tech]

The problem with inexpensive [under $10,000] setups is they run parasitically all the time. Wearing belts and supercharger and it's bearings and reduce cruising MPG. Waiting for the occasional need [WOT].

A real setup would have an electric clutch and air bypass around the SC charger closing only on demand.

Superchargers tend to have a 50-60,000 mile average life [low cost designs] built to be rebuilt.

[QShip]

I never thought of that aspect of the s/c. I'm glad you it mentioned Dennis.

[elwesso]

I guess it depends, because on the eaton SCs that are on the Q setup and the Gm 3800SC engine, they may require rebuilding after 100k, but its very inexpensive to have it done ($100 or so?) and things like that....

I dont know why youd have a clutch or anything like that, no OEM setup has that...

[maxnix]

1.) I guess it depends, because on the eaton SCs that are on the Q setup and the Gm 3800SC engine, they may require rebuilding after 100k, but its very inexpensive to have it done ($100 or so?) and things like that....

2.) I dont know why youd have a clutch or anything like that, no OEM setup has that...

1.) But the SC is engineered for each appliclation. It is not just a staright bolt-on.

2.) Parsitic losses when they are not needed.

[radride]

I think the 88 toyota mr2 supercharged had a clutch system for the supercharger.

R.K.

[radride]

If you just want a sudden burst of power just hook up some nitrous. Its cheap and safe (if installed properly).

R.K.

[DrewQ45]

1.) But the SC is engineered for each appliclation. It is not just a staright bolt-on.

2.) Parsitic losses when they are not needed.

Maybe some people are willing to make the sacrifices for the benefits. I don't think anyone installing one of these is not going to expect a mileage reduction. As far as supercharger wear from running full time... if it's made well enough, IE: quality bearings etc... it should not break down for quite a while...just like the other compoments that run full time. If it costs ridiculously more to have a clutch setup which may probably be tough due to space issues, then maybe it's not worth the extra $$$. This is especially true when installing on a high mileage vehicle which will meet it's demise sooner than later, especially with adding the stresses of supercharging.

It's like running NOS, everytime you spray it's like smoking a cigarette... a few minutes of life gone. Everything is a balancing act.

..Drew....

[BlackBirdVQ]

I guess it depends, because on the eaton SCs that are on the Q setup and the Gm 3800SC engine, they may require rebuilding after 100k, but its very inexpensive to have it done ($100 or so?) and things like that....

I dont know why youd have a clutch or anything like that, no OEM setup has that...

Mercedes uses a clutch on their "kompressor" that turns on via electromagnetic clutch- kinda like your AC compressor. There is one FWD SR20 using that system and makes unusable power on the street. I had a few of those blowers laying around before and thought bout doing that to my Maxima.

As far as life expectancy of the blower, it depends... cooworker has a 98 GTP with 3800 SC with 150K miles on the original blower and it still pulls fine and runs good.

Q45tech- you are confusing roots blowers with centrifical blowers like the Vortech or Paxton units- they tend to need rebuilds much sooner as they see alot more strees on their bearings due to the gear reduction mechanism and belt tension causing radial stress. Typical of a Stillen SC for a Maxima to need a rebuild around 50-60K miles.

Problem with centrifical blowes is they don't have power till they get up in RPMs, and you need to constantly rev the engine to make any decent power. You boost will gradually increase from bout 4K RPM where it starts to make something till redline where it peaks.

Roots blowers like Eaton make boost instantly, why the Stillen kit for the RWD VQ35 is a such nice unit. It makes a G35 feel like it has a big block V8 under the hood with nice dose of TQ right off the line. They do not like high RPMs and that is their disadvantage.

[blind6]

The 4.08 is not helping much. It's like a teaser.

What's this........so before I finalize my purchase, is this a worthwhile mod or is the ECU the best bet to wait on? Also, has anyone had any luck with the yellowbox working properly on the Y33?

[elwesso]

do the 4.08. DO EET.

[blind6]

do the 4.08. DO EET.

"yellowbox"? any info?

[97Q45t]

The 4.08 is not helping much. It's like a teaser.

What's this........so before I finalize my purchase, is this a worthwhile mod or is the ECU the best bet to wait on?

Tommy,It IS a worth while mod (as long as you don't want to go low 15s or sub 15s 1/4 mile). You will definitely see/feel the improvement of the 4.083 diff. I want to go faster now (sub 13s) hence "the teaser".

Also, has anyone had any luck with the yellowbox working properly on the Y33?

No word on the yellow box yet. There are only 2 person with a Y33 that has the 4.083 in the US that I know of (unless they post on some other websites). The first one was me. The second one was Petr. He recently sold his Y33 and I don't think he tried to correct the speedo. I was thinking I would do it before but it doesn't really bother me at all now.

I don't know if you've seen Petr's post about his impression on the 4.083 on his Y33 but here it is if you still have a doubt :

zerothread?id=137144
Modified by 97Q45t at 10:14 PM 2/20/2006

[blind6]

No word on the yellow box yet. There are only 2 person with a Y33 that has the 4.083 in the US that I know of (unless they post on some other websites). The first one was me. The second one was Petr. He recently sold his Y33 and I don't think he tried to correct the speedo. I was thinking I would do it before but it doesn't really bother me at all now.

I don't know if you've seen Petr's post about his impression on the 4.083 on his Y33 but here it is if you still have a doubt :

zerothread?id=137144

Modified by 97Q45t at 10:14 PM 2/20/2006

Not doubting you Duy just got confused again....I'm not ready for 13's yet, that's for sure!!!!!!! What are some questions other than mileage that I should ask the seller of the Z32 diff? I'll probably end up sealing the deal tomorrow and start prepping it before the install. I'll email you some more questions about the install as I get there.

[blind6]

Anymore word whether the SC will bolt-on to a VH41? What would be needed to accomplish this? Has anyone ever used a AFC on a Infiniti motor and what were the results?

[blind6]

???

[97Q45t]

<--Wes

Tommy, what's an AFC?

[elwesso]

I dont really have any way of knowing... the only way to find out would be for a Y33 guy to try and bolt on a G50 intake.....

I dont know what you want me to do, but i cant think of anything that I can do that would really help.

[blind6]

<--Wes

Tommy, what's an AFC?

super-air fuel controller(S-AFC)

Look under APEXi website under S-AFC it gives a better explanation of it.

[blind6]

Well, here's what I think I'm gonna dabble in. When I get back to the mainland in June/July I'm gonna try to locate a 4.5 motor and build it specifically to handle boost. This will include forged dished pistons, three angle valve job, decked head/block, knife edged crank, lightened flywheel, upgraded valve springs. Rotating assembly will be balanced and blueprinted. Once all this is done I'll be looking at a SC to bolt on.

I don't think that my current motor could handle boost right now, its showing signs of blow-by in the #1 cylinder. I would rather drop a 4.5 in my Y33 simply because that's it's name, not Q41. Once my wife finds her X5 she wants, the Q will be mine to play with. I am also planning to do the same to my 81 Jeep, but I'll be putting in a 4.0 and turbo set-up.

I also think that the diff swap is gonna have to wait, the import scene out here is too big and everyone is asking too much for their Z32 diffs or they won't sell w/out the brakes.

[dsagers]

dont make this harder than it has to be!! The supercharger is READY to go for anyone whos serious.

Wes, what do you mean this is ready to go? Can you give more details?

[elwesso]

Well, here's what I think I'm gonna dabble in. When I get back to the mainland in June/July I'm gonna try to locate a 4.5 motor and build it specifically to handle boost. This will include forged dished pistons, three angle valve job, decked head/block, knife edged crank, lightened flywheel, upgraded valve springs. Rotating assembly will be balanced and blueprinted. Once all this is done I'll be looking at a SC to bolt on.

I don't think that my current motor could handle boost right now, its showing signs of blow-by in the #1 cylinder. I would rather drop a 4.5 in my Y33 simply because that's it's name, not Q41. Once my wife finds her X5 she wants, the Q will be mine to play with. I am also planning to do the same to my 81 Jeep, but I'll be putting in a 4.0 and turbo set-up.

I also think that the diff swap is gonna have to wait, the import scene out here is too big and everyone is asking too much for their Z32 diffs or they won't sell w/out the brakes.

why would you waste time and money doing all that crap when your probably not going to want to run over 10lbs of boost with the SC setup... If your going to run higher than that, youll definitlely want a turbo seutp as it will be much more efficient at high boost.....

The supercharger has already been developed and are all built to order... You are required to give a 50% deposit to start work, and then the rest at delivery.