E30 325i TURBO QUESTIONS !!

[BMW2ner]

Can you guys help me please with a few things I have to clear up on my turbo set up. I am putting together a turbo kit and I have come to the confusing parts. Any help would be great. I only plan on running 5-7psi for a while so I'm not going crazy till I can get more money

1. What is the best thing to do for a fuel set up? Is it true that I can use 524td injectors and a Fuel Pressure Regulator?

2. What do I need to do to account for the extra air in the system? Is a new computer needed for only 5-7psi?

3. I got a 524td downpipe on ebay for cheap just hoping it would work, will it? What is the best exhaust setup? I know I need a one pipe set up, but do I need two mufflers like in the stock set up?

Any other things that you can help me with would be great. Thanks again

[e30boosted]

I would look for company that makes a chip, it will run way better! Run a FMU and i would use 5.0 Mustang injectors(direct fit)....For exhaust run no cat 2.5in to a magnaflow or some muffler...

Originally Posted by BMW2ner

Can you guys help me please with a few things I have to clear up on my turbo set up. I am putting together a turbo kit and I have come to the confusing parts. Any help would be great. I only plan on running 5-7psi for a while so I'm not going crazy till I can get more money

1. What is the best thing to do for a fuel set up? Is it true that I can use 524td injectors and a Fuel Pressure Regulator?

2. What do I need to do to account for the extra air in the system? Is a new computer needed for only 5-7psi?

3. I got a 524td downpipe on ebay for cheap just hoping it would work, will it? What is the best exhaust setup? I know I need a one pipe set up, but do I need two mufflers like in the stock set up?

Any other things that you can help me with would be great. Thanks again

[e30boosted]

P.S. i thought u wanted to maybe trade me?

[BMW2ner]

thanks for the help and I did want to trade but then I came into a little bit of money and decided to build my own. I still think your car is amazing, I dont know to much about it but it is down right beautiful. If you dont mind me asking what color is your paint.

[NWe30]

No offense, but your first post makes it crystal clear you have no idea what you are doing. Perhaps you should rethink you plans.

[BMW2ner]

Originally Posted by NWe30

No offense, but your first post makes it crystal clear you have no idea what you are doing. Perhaps you should rethink you plans.

No the problem is that I know how things work but I have no "real" experience with putting a turbo on. The reason I need to ask the questions is mainly because of fourms. I read mixed answers, I was just asking peoples personal experence, not what they read some where on the net.

[NWe30]

...

ok.... right....

As far as fueling goes. 19lb injectors will take you to 275HP. go with 21 or 24lb injectors if you will be making more power then that.

adjustable FPR is a good bonus, but not needed if you have the car tuned right.

stock ecu will handle 5-7psi fine with fuel system upgrades

524td injectors dont work. its a freaking diesel... also the 524td manifold/downpipe is garbage. make a custom setup.

[e30boosted]

Haha..its chill... My paint it Candy Apple red.

Originally Posted by BMW2ner

thanks for the help and I did want to trade but then I came into a little bit of money and decided to build my own. I still think your car is amazing, I dont know to much about it but it is down right beautiful. If you dont mind me asking what color is your paint.

[NWe30]

[e30boosted]

Haha thats awesome! i like...

Originally Posted by NWe30

[MaDhAtTeR]

Originally Posted by NWe30

...

ok.... right....

As far as fueling goes. 19lb injectors will take you to 275HP. go with 21 or 24lb injectors if you will be making more power then that.

adjustable FPR is a good bonus, but not needed if you have the car tuned right.

stock ecu will handle 5-7psi fine with fuel system upgrades

524td injectors dont work. its a freaking diesel... also the 524td manifold/downpipe is garbage. make a custom setup.

You know what, you have been giving out some really shit advice recently, you bag others for their lack of knowledge but you exhibit the same traights.

19lb injectors at 58psi (system pressure) are not large enough to support 275hp, where did you get that figure from? pull it out of your arse? Unlike jordan's mythical numbers, you can actually work out horsepower ratings with a simple formula.

19lb injectors, when run at 58psi equate to just under 22 lbs/hr. To find out how much horsepower they can flow it is simple.

Injector size (lbs/hr) x duty cycle / BSFC

Using basic figures for both duty cycle (80%) and BSFC (of 0.5 for a NA, 2 valve engine), it is as follows

HP flowed = (22 x 0.80) / 0.50
= 17.6 / 0.50
= 35.2

So, 6 injectors, rated at 19 lbs, have a maximum flow rate of around 211hp. It differs slightly with the real BSFC of the engine (from experience i have found them to be around .56), just what duty cycle you wish to run (though you shouldnt really exceed 80%), and just how much fuel pressure you want to run, but 19lb injectors arent good for more than 220hp at best.

Lastly, the 524td manifold is fine, quite a few people use it but you need to modify it (notch out some of the holes to fit). You could easily make in excess of 300hp with a td manifold.

The other option many people use is to copy the manifold adaptor, it bolts straight onto the existing pair of manifolds, forms a u shape bend, then comes back up to a base plate to bolt your turbo onto. Saves you spending vast amounts of money on a tuned length tubular style manifold that really isnt needed for most people.

You need to settle the hell down jordan, you arent the be all and end all of E30 knowledge, you treat people like shit when they dont deserve it. If your advice was accurate enough of the time you might have the ability to backup the talk, but im affraid you dont.

Now that is finished with, there are a couple of threads here which might interest you.

http://www.e30tech.com/forum/viewtopic.php?t=3318 that is the turbo faq
http://www.e30tech.com/forum/viewtopic.php?t=3215 that is the injector thread.

Edit: Couple of extra links.

http://www.e30tech.com/forum/viewtopic.php?t=3341 talking about the TD manifold.
http://www.e30tech.com/forum/viewtopic.php?t=1913 talking about manifolds in general
And if you go here http://www.mkosonen.com/manifold.html to matt's site you will see the adaptor i was talking about before.

[NWe30]

My bad, after a long day of work, late at night i crunched some numbers and multiplied by 8 instead of 6. Life goes on.

Still he wont be making that much power with his m20.

the 524td manifold is still a cast log style hunk of shit. Its ugly, it flows poorly, and its just crap. If you are going to make a turbo setup do it right! don't use some 20 year old rusty factory manifold that sucked 20 years ago, and still sucks today.

There are several full manifolds available, but they cost money. something most of the stupid kids that want turboz dont have.

[MaDhAtTeR]

Thats what is called DIY, plenty of people use them for low boost setups without a problem in the world. They are cast iron so they generally last for ever, the biggest plus for them is they are compact, and it makes it easy to change your spark plugs.

You have no hope in hell of getting a socket in with a full length manifold, even people with the adaptors have the same problem, most end up unbolting the turbo everytime.

[NWe30]

Thats true, but that aside... custom cars be customized labor. How often do you change your spark plugs? Once a year? Maybe twice?

[BMW2ner]

Hey MaDhAtTeR thanks for the advice and the formulas. Those links were also pretty helpful, but have you ever heard of using the mustang 5.0 injectors before? I think that would make things a little cheaper, but if you listen to NWe30 CHEAPER always equals BAD.