I have a 97 gxe with in intake and i am buying a greddy exhaust. i am also looking to buy either a turbo or supercharger. which one is better and will be worth my money?

 

The SC is a simple to add kit with limited power abilities. The turbo, which is fairly new for Maximas, has much more potential power. The turbo will also require more tuning but will yield the most power. To my knowledge, the turbo costs at least $1000 more. I hate to say it but do a search in this forum and you'll find a ton of threads relating to this topic. Good luck w/ whatever you decide. Oh yeah, just so you know, I don't have either and am certainly not an expert in this field.

 

dont go with either, get a 5th gen... err better yet, a 6th gn gle?

 

If you are worried about dependability.. stay away from both.

The S/C is known for it's melting pullies, blower rebuilds, crappy service from Stillen and Vortech

The turbos are newer, not THAT much info on them. If you do blow something up, it is more likely to be more catastrophic.

Get a 350Z if you want speed

But hey, don't listen to me. I was 1 day away from an S/C install, then I ran into problems, and had to sell it off

 

Turbo..

no need to change pulley to change boost

 

A boosted 4th gen is faster/quicker than a stock 5th gen.

 

Exhibit A:

http://forums.maxima.org/showthread....hreadid=186970

 

Doooh!! I posted this in the wrong thread. Disregard that loud brain fart.

 

auto=supercharger

5spd=turbo

 

Get the best of both worlds and powercharge it and come back with pics.

 

A stock 4th gen is quicker than a 5th gen until the 5th gens variable intake kicks in. not trying to start a dispute

Go turbo ****. i'm looking forward to getting one too. as soon as i sell my 4 wheeler and find someone that'll put something together for me.

Let me know what you end up choosing and lemme know how it goes for ya

Good luck



P.S(sorry for whoring up your thread)
1995 yamaha warrior for sale in Poughkeepsie Ny. (about 20-25,000 miles, 6 speed, 350cc, 4 stroke, piaa headlights, Supertrapp exhaust durablue axles. $3,000

 

get a turbo....with turbo, its cheaper than 5th and 6th gen and u still faster, even faster than 350z i think and wayy more cheaper, blow a couple trannies and engines and u still making off better wit the turbo vs buying a new car...

 

yea but the migrains I'll be getting in the process wouldn't be worth it

 

i'm not the biggest expert in this field, but if you have a SC, don't you actually lose some of the HP on just making the turbine spin, but with a turbo, since it's the exhaust that's making it spin, none of the HP is wasted?

I would go with the turbo, even though you have to spend extra money on things like an ECU upgrade.

 

si senor











...boy have I been a postwhore these past 24 hrs!

 

With a turbo, you still lose a little power because of the ncreased resistance in the exhaust system. The difference is that the power isn't bled directly from the crankshaft from a turbo. With a turbo, you will have nearly the same TQ curve until about 3k to 3.5k rpm as N/A, then the turbo starts making boost and depending on the compressor and boost controller, you can make gobs of power. Resistance in the exhaust will be negligable to the gains in hp that the tubo gives.

Either way, Supercharger or Turbo, you have to lose a little hp before you gain it. With a turbo there will be less hp loss at low end. Also, when a turbo is driven like a docile sedan (under 3k rpm), it will prove to be far more fuel efficient than a supercharger.

 

check your pm box.

 

I wouldn't say you lose power! You may use 6 hp to spin the supercharger and get back 60hp. Not bad. I wouldn't say its a loss.

 

Its a lot more than 6hp, however, the amount you get back at least doubles, if not triples the parasitic drain of the compressor. So, there is a net gain even if the gross loss is significant. Same deal with the turbo, just at different parts of the powerpand.

 

Without a doubt i agree; but look at it this way: Hypothetically, lets say a TC and an SC both give you an increase of 70HP. However, the SC creates a loss of 6 HP, while the TC creates a loss of 3 HP. Technically, The SC only gives you an increase of 64 HP, while the TC gives you an increase of 67. And while 3 HP may seem like a moot point, if you're Boosting your car (SC, TC, NOS, whatever) you're not (at least you shouldn't be) using the car as your daily driver, you're using it to race, when every bit of power is important.

 

Like I said, parasitic losses will be greater than just 3 or 6 hp. For instance, a 350 Small Block Chevy Roots type will suck out about 25-35 hp before delivering a net gain of 65 to 75 hp at 5000 rpms. Given this a roots type blower and not the centrifugal type that Maximas use, there is still that peak drain at maximum boost, which should be the same, just because of the energy needed to compress the air to 6 PSI or greater. Here is a link to a good article.

http://www.nhrasportcompact.com/2002/news/043001.html

Be sure to check out the last paragraph in that article. It says exactly what I've been trying to say.

 

All it comes down to is:

would you like to have 235 FWHP @ 7 PSI with a_______?

OR

would you like to have 295 FWHP @ 7 PSI with a_______?


Word bank:

Custom Turbo, Stillen Supercharger

 

update your knowledge.. the turbo is cheaper than the supercharger

 

i was using 3-6 HP as an example. The artice was very good, and more or less explained waht i was trying to say: Turbo is better

And also, who said a turbo is more expensive than a SC? Las time i checked the turbo kit for our car was like $3400 (i'd like an exact price, but turbomaxima.com is down), while used SCs go for the same price.

 

yeah when i left for work this morning my DSL was down

yeah.. comparing what you get in both kits.. the Supercharger is more expensive...

the new Supercharger kits retail for $3900
turbo kits are going for $3700 with intercooler..

add another $500 on that supercharger kit.. and boom.. its whole other ball game

 

HP should be measured at the wheels to mean anything to us. If that were the case, the loss of either SC or TC is already calculated. If a SC delivers 40hp at the wheels and the TC delivers 40 hp at the wheels. Then thats what it is. No need to consider losses of driving either. The argument shouldn't be about how much HP is lossed from turning the compressors. It should be powerband vs max power. Even that argument wouldn't go far. SC provides better initial torque and your boost is limited to using pulleys. TC has more potential for boost and maximum HP. In tuning your turbo you have a good chance at blowing up your motor if you go nuts. If you just want more power and want to keep drivability, SC is for you. If you want max power and you like tinkering and don't mind breaking stuff, TC is for you. You also sacrifice a little bit of driveability with a TC. Though smaller compressors don't really have much lag. Someone recommended a SC for an auto and a TC for a manual. I would agree with that one. TC with the max's 4-speed auto is a no no.

ZuM

 

I do not have any concrete evidence that a turbo charger on an auto is a bad idea, but I can speculate...
The SC is always on and the amt. of boost is proportional to the rpms. This way power delivery is smooth/gradual to the weaker auto tranny.

The problem with the turbo is once it spools up, in a much shorter period, the tranny has to deal with a surge of power ranging from ~40-300hp depending on how much you boost. This would probably damage the tranny if the boost was up too high. With a turbo it's very easy to up the boost and that's the main problem. People get greedy.

An auto max can be TC'ed though. You would just have to limit the amt. of boost. Maybe around 4.5psi or so. You would still get more NET hp out of it than an SC with a smaller pulley @ ~10psi.

Based on this graph:
http://www.pfispeed.com/images/Produ...rbo-dyno01.gif
you can probably estimate about 280hp at the wheels, ~335 crank hp!

The other main reason TC auto's aren't popular, other than what I said above, is because the tranny is so much larger than a 5spd. The piping has to be fabricated around this which is harder to make.

If I were an auto, I'd see how things go since auto TC's are new. Choosing this route may be more beneficial for auto's wanting more power. Hell, it would be easier on your engine bing able to run half the boost of an SC and still get more power to the ground. hlh0501 said he would TC a max if you came down to the shop. I'm not sure about Nigel, he may as well.

 

Wouldn't it be interesting if they made a Supercharger Kit with variable diameter pulleys so that the pulley size could be varied throughout the RPM range? It would have to incorporate some kind of infintely variable gearbox like in the new Audi transmissions.

 

Isn't some other things you should unpgrade on your car to "prepare it" for the turbo?

 

I think the issue isn't power produced. But power not produced. The 4 speed auto's gearing is spaced far apart. The autos aren't able to launch at high RPMS either. There will be a lot of lag when taking off. When the car switches to the next gear the car may fall out of the turbo's powerband and lag some more. Cruising in 4th on the highway at 55 mph would be.. lagg... The car would feel like crap I think.

ZuM

 

I find this to be wrong in a way but right in another. Get your hands on a S/Cer and spin the pulley with your hand. No resistance at all hardly. Very easy to spin. So I wouldnt think it would create that much of a loss if any.


*** ZuMBLe - email me and we can talk about the S/C if you really want it. wayne19_82@hotmail.com

-Wayne

 

Dude get a Turbo, they have a lot more power, why would you wanna feed hot air into your car anyways man... Youengine is cool all the time for a reason... think!!! Also you can crank boost with a turbo. with an auto there is no lag at all...

 

Please share with me how you think a S/C feeds hot air...

or(or you sayin the turbo......)

 

Getting my review for my raise at the end of the month. That has to come through first. =(

 

Thats cool....I got a great deal for you . just let me know.

 

Okay, what does cranking the boost have to do with gearing and lag? Are you aware that air coming out of a turbo is probably HOTTER than out of a SC? Turbo is powered by hot exhaust gases.

 

 

You're correct. Except for one thing. I didn't say 4th gen stock vs 5th gen stock. I said 4th gen boosted is faster than 5th gen stock.

Capish??

 

I agree with you somewhat. There will definately be more lag initially since you cannot control the gears, but once you get going, I don't see why it would lag between shifts. When an auto shifts close to redline the rpms would drop above 3500-4000rpms which would be a good spot for it.

When you're cruising and then you step on it there would definately be some lag, but wouldn't the the same happen with a 5 speed cruising at 55? The time spent downshifting to produce boost wouldn't be that far off from an auto's time to downshift esp. with the VB mod. You can also turn the OD off wich would put you in a good spot to make some boost at 55, i think.

Let's get some TC auto's out there vs. TC 5speeds from like 50-90 and we'll see what's up.

 

any motor that is not meant for forced induction out of the factory needs to be dealt with carefully. there are a lot of variables you need to pay attention to in a turbocharged car...it is as simple as bolt it up and crank the boost. in fact, it is very much the opposite. i am speaking as a DSMer so i am not totally aware of all the factory specs on the 4th gen maxima. my friend has a 99 and it is pretty quick for what it is. the key concept is air/fuel ratio and preventing knock. with a turbo you will have to run 93 octane fuel ALWAYS, anything less and you will start to preignite the mixture in the combustion chamber = F*#$ed up motor. larger injectors would be a must to supply adequate fuel and depending on the flow rate of the factory fuel pump, a larger one might be needed to supply enough fuel. it is safter to run a richer mixture of air and fuel because this will keep combustion temps down and save your motor the hardship of running lean...this is where EGT's (exhaust gas temps come into play). i could go on and on, but i won't. am i stretching this a little far...probably so. i am sure whatever kit they make for the 4th gen maxima is pretty adequate, but don't just assume everything will be great because more times than not this is exactly the case. do your research and find out what other people are doing. apparently, from previous replies, this turbo kit is a newly developed product. i would estimate that 6-8psi can be had through the kit. but if you skimp on everything, at least do not skimp out on your fuel delivery system. other than that this should make a great power adder. turbos are great because they weigh less than a supercharger, are not belt driven therefore do not put a load on the crankshaft (draw power or lose horsepower), and they are emissions efficient devices because the turbine wheel recycles spent exhaust gases. not to mention, the general rule of thumb is 10-15hp gain per 1psi of boost THAT IS PROPERLY SUPPORTED (tuned correctly). hope this helps a little...didn't mean to ramble so much but turbochargers are very complex systems and are often seen as simple ways of gaining power on naturally aspirated motors without having to do much. that is hardly the case. turbos rule! i speak from experience.