Increase horsepower - Page 2

John W · 12-07-2005, 11:35 PM

The M44 is a very tough engine to get power out of without going to forced induction. The DASC is so popular because it is a well-built kit that does not hurt the day-in, day-out reliability of the car (like so many other forced induction kits do). It also delivers the horsepower it advertises.

Light flywheels will really help the car rev, but by the time you install one along with a new clutch you will be shelling out quite a bit of $$. Still, it's a good upgrade if you need to replace the clutch anyways ...

You could change the crank and pistons (if any quality parts are available??). I believe you can reliably punch the bottom end out to 2.1 liters.

The stock exhaust on the 318ti is very good. You would be hard pressed to find an aftermarket system that flows better. And many out there actually produce less horsepower than the stock system.

Grassroots Motorsports did a brief series on the 318ti in the late ’90s. They found that switching to synthetic oil yielded a nearly 5hp improvement at 4200 rpm. While it barely improved peak horsepower at all, the additional 5hp in the meat of the rev band is welcome since these cars don't really wake up until 5k rpm. The switch is worthwhile, cheap and noticeable.

They also found switching to Nology racing plug wires produced 1.5 peak hp over new stock wires. Not a huge gain, but worth it for a ~$85 part.

Fogging the airbox is also cheap. It *feels* like it adds a bit of power up top, but I doubt the gain is more than 2-3 hp with a K&N drop-in, if anything.

Making sure that everything else is in good condition (fuel filter, 02 sensor, etc. etc.) will ensure you're making the most of what you have.

In short, you're not going to see huge (or even moderate) horsepower gains without spending a lot of money.

GDB · 12-07-2005, 11:53 PM

there is an article at www.bimmerforums.com where a guy in SA built a stroker for the M44 using a combination of other BMW parts. I'd post a link, but I can't get bfc to work right now.

96cali · 12-08-2005, 12:53 AM

Quote:

Originally Posted by 1996Bmw318TI

Why do u ask?

Your posts read like you are out of breath. I always think you're ADD or on meth when I read them. Come to think of it, your post above is the most coherent I've read from you.

Since you asked...

aceyx · 12-08-2005, 01:08 AM

Quote:

Originally Posted by 1996Bmw318TI

I dont get it. Your saying i speak english good or bad?

I don't mean this as a slam in any way, but it's difficult to read your posts and find the meat of the question you're asking.

Typos and misspellings happen, and that's fine, but it looks more like you're just not taking enough time with it. Relax, slow down, and figure out what you're trying to say.

The reason I asked was because I know there are differences in sentence structure and conjugation, so a direct translation from other languages would sound weird to me.

Again, I'm not trying to be rude, but rather trying to point out that you're more likely to get a good response if the question is easier to read / figure out.

I mean, I'm pretty sure that kid that came in typing in all caps didn't get a response yet

AlaskaBlue · 12-08-2005, 01:34 AM

I got the flywheel upgrade. I like it quite a bit. It makes the engine rev a lot quicker. It doesn't really add horsepower though. If you want to go with bread and butter mods like a chip and an intake I wouldn't discourage it. You have to get an idea of what you can do. If you want performance cut down down on weight. Take off all the not needed weight eg. sound systems, spare tire, back seats, etc. it is free.

**1996 328ti** · 12-08-2005, 02:42 AM

Quote:

Originally Posted by aceyx

I mean, I'm pretty sure that kid that came in typing in all caps didn't get a response yet

I edited it.

GDB · 12-08-2005, 03:22 AM

Quote:

Originally Posted by AlaskaBlue

I got the flywheel upgrade. I like it quite a bit. It makes the engine rev a lot quicker. It doesn't really add horsepower though. If you want to go with bread and butter mods like a chip and an intake I wouldn't discourage it. You have to get an idea of what you can do. If you want performance cut down down on weight. Take off all the not needed weight eg. sound systems, spare tire, back seats, etc. it is free.

FYI, flywheels do increase wheel hp.

AlaskaBlue · 12-08-2005, 03:26 AM

Quote:

Originally Posted by GDB

FYI, flywheels do increase wheel hp.

I knew they increased hp to the wheels, but I don't consider at as really adding hp because the engine still puts out the same at the crank. I'm not sure how many that it would gain to the wheels though. Probably just a few.

andrewsarg101 · 12-08-2005, 03:34 AM

"Accelerating a pound of wheel weight is like accelerating 1.5 pounds on your chassis. Accelerating a pound of tire weight is like accelerating 2 pounds on your chassis. Accelerating a pound of flywheel is like accelerating as much as 30 pounds on your chassis, depending on what gear you are in" SCC Technobable Jan 06'. Like AlaskeBlue said your engine doesn't put out more, its just less parasitic loss from the weight of the flywheel. Underdrive pulley kits work under the same concept, less work more go. But yes this will show more hp on a dyno.

HuGo · 12-08-2005, 07:50 AM

lol i was planning to take out the back seats. Well i just type and i dont pay attention to grammar since it is internet.

cali-ti · 12-08-2005, 01:53 PM

Quote:

Originally Posted by AlaskaBlue

I got the flywheel upgrade. I like it quite a bit. It makes the engine rev a lot quicker. It doesn't really add horsepower though. If you want to go with bread and butter mods like a chip and an intake I wouldn't discourage it. You have to get an idea of what you can do. If you want performance cut down down on weight. Take off all the not needed weight eg. sound systems, spare tire, back seats, etc. it is free.

what lightweight flywheel / clutch combo did you go with alaskablue? i'm looking at the UUC stage 2 with m5 sprung-hub clutch setup.

DustenT · 12-08-2005, 01:55 PM

Quote:

Originally Posted by 1996Bmw318TI

lol i was planning to take out the back seats. Well i just type and i dont pay attention to grammar since it is internet.

You should pay attention to grammar. A conversation on the internet is no different than a conversation in person. If you spoke to someone the way you type, nobody would give you the time of day.

cali-ti · 12-08-2005, 01:55 PM

Quote:

Originally Posted by 1996Bmw318TI

lol i was planning to take out the back seats. Well i just type and i dont pay attention to grammar since it is internet.

punctuation and real sentence structure help a lot. it's very hard to read one really long, run-on sentence that should be a 3-4 sentence paragraph. we don't want to play spelling/grammer cops, but it does make it easier to actually help answer your questions

AlaskaBlue · 12-08-2005, 04:13 PM

Quote:

Originally Posted by cali-ti

what lightweight flywheel / clutch combo did you go with alaskablue? i'm looking at the UUC stage 2 with m5 sprung-hub clutch setup.

I went with the TMS 9lb fllywheel and a sachs clutch. It chatters some but it really isn't bad. I have heard the M5 clutch on the UUC unit adds a significant amount of weight to the whole assembly. That is just what I have heard though.

DustenT · 12-08-2005, 04:47 PM

Quote:

Originally Posted by AlaskaBlue

I went with the TMS 9lb fllywheel and a sachs clutch. It chatters some but it really isn't bad. I have heard the M5 clutch on the UUC unit adds a significant amount of weight to the whole assembly. That is just what I have heard though.

If you want anything lightweight, you will have to deal with chatter. The UUC/M5 combo is the best on the market and doesn't chatter (that much).

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