turbo (and yes i have searched)

[NC325iC]

i know most people with FI(forced injection) use turbos on this forum at least
i would like to know how much i could expect to spend creating a turbo kit (also what is recommended to buy im sure there is a list somewhere)

i was also wondering what people think of S/C's there are less parts necessary but S/C's cost a butt ton of money well i guess i just answered my own question

[riverdale21]

I have considered SC'ing my car too. I still went ahead and bought a turbo and intercooler but the thought of a SC is very attractive to me.

Here are my reasons:

1. Superchargers are abundant in my local junkyards. You would be suprised how many domestics came with superchargers. You can find many Pontiacs with the M62 roots style SC, also a lot of Thunderbirds had the same type of SC.

2. Fabrication would be less for a SC than a turbo (theoretically). After all you only have to fabricate mounts and sort of a collection chamber for the SC outlet as opposed having to get a exhaust manifold, downpipe, and intercooler piping for a turbo fabricated.

3. You will get better throttle response and a broader torque curve with a SC vs Turbo. That makes it much more livable in a daily driver.

The downside to a SC is limited HP potential and limited ability for intercooling. The HP that a SC can offer should be more than adequate for a daily driver though.

What I had thought about using is either a M62 or M90 positive displacement SC coupled with a SMT-6 for engine management should yield about 200hp or more. At least thats all that I would be shooting for with either a turbo or SC on my little M42.

[E30godz]

the mounting bracket for the supecharger and pully for the crank i think would be the biggest obstacle.

other than that its not a bad idea, but there is a shit ton more info on DIY turbo projects.

[skat 325is]

also you wont be able to use the a/c with a SC.

[Schnell 318]

also you wont be able to use the a/c with a SC.

sure you can, you would just have to modify the crank pully, ive seen it done on an e30.

an easier route is to remove the ac compressor and mount it in the ac location and utilize the ac mount, pully, and tensioner.
theoretically you could do the same thing but use the power steering components.

[riverdale21]

It would be much more efficient to actually mount the supercharger so the discharge makes a direct shot into the throttle body and mount the AFM on the inlet side. I am planning on using a SMT-6 to convert to a MAP system so I wouldn't have to worry about that in my setup. But you could have a local shop just tac weld a additional pully to the end of your crank pully and drill and mount or have the tensioner from the donor vehicle welded to the the side of the block by the crank pully. You could also just have brackets fabricated that could act like the stock tensioners that have like a pinion built into the nut so when you tighten the nut it stretches the bolt. There are a number of ways to do it.

[NC325iC]

also you wont be able to use the a/c with a SC.

notice the last letter of my name
convertible boy i dont hardly ever use my ac less its rainin and then i dont use it much anyhow

[TCD]

I have considered SC'ing my car too. I still went ahead and bought a turbo and intercooler but the thought of a SC is very attractive to me.

Here are my reasons:

3. You will get better throttle response and a broader torque curve with a SC vs Turbo. That makes it much more livable in a daily driver.

Wrong, Wrong, Wrong Wrong! I wonder if this myth will disappear in my lifetime. A properly engineered turbo system is far superior to a SC. Roots style or not!

Todd
1989 325i turbo with instant boost and throttle response. Just ask Greg!

[Kavkazia]

And remember SC is driven by belt so whatever power it throws it takes about %25-30 back.

Turbo adjustable power on one touch of botton, daily driving low boost, drag racing high boost also cheaper to rebuild and less noisy.

[E30godz]

do you think 25-30% is a bit...high? i know there is a parasitic drag loss, but almost a 1/3rd of the engines power?

[riverdale21]

If you have the money to buy the proper equipment then yes you can make a turbo that could have a better power band than a supercharger. But if you are a junkyard dog or on a shoestring budget then a SC might be a better option.

[kylebes1]

I have considered SC'ing my car too. I still went ahead and bought a turbo and intercooler but the thought of a SC is very attractive to me.

Here are my reasons:

3. You will get better throttle response and a broader torque curve with a SC vs Turbo. That makes it much more livable in a daily driver.

Wrong, Wrong, Wrong Wrong! I wonder if this myth will disappear in my lifetime. A properly engineered turbo system is far superior to a SC. Roots style or not!

Todd
1989 325i turbo with instant boost and throttle response. Just ask Greg!

I agree here, but riverdale has a 318is right, and as with all the Honda boys instant boost is possible but you cannot get much of it.