E30 325e to 325i Turbo

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87e30
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Re: E30 325e to 325i Turbo

Postby 87e30 » Thu Jul 04, 2013 2:18 am

That is beautiful. You can drop it off at my house whenever you want. ;-)

Just wondering one thing though... Why so many welds in the exhaust? Why not bend it instead? Wouldn't the inside of the welds cause much more resistance than smooth bends? Would welds vs bends even make any difference in power whether turbo or NA? Even if it's not noticeable I would think there would be at least a little difference in the numbers.
Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
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Re: E30 325e to 325i Turbo

Postby MaikelK » Thu Jul 04, 2013 4:24 am

The work on the FMIC was needed anyhow, with the original pipes it hit the framerails.
And my other opinion is, the flow wil now increase. At least, thats what I think!

And the exhaust is welded by a pro. I was looking through the open end and he even closed almost a 1 cm gap without the weld dropping in, so I don't see a problem there. I don't think it would be a big difference!
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Re: E30 325e to 325i Turbo

Postby Yoshi » Thu Jul 04, 2013 11:34 am

I still think you could have done the FMIC differently. I'm not fond of sharp transitions around corners. Works though. looks spiffy!
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Re: E30 325e to 325i Turbo

Postby M20_fever » Sat Jul 06, 2013 4:20 am

Nice work! How much power are you looking to make?
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Re: E30 325e to 325i Turbo

Postby MaikelK » Sat Jul 06, 2013 7:39 am

First power goal is around 300hp, here my injectors probably will max out. If that gets boring, we will see what will be next haha!

Turbo isn't the problem I think, only the injectors need to become bigger for more power I suppose!
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Re: E30 325e to 325i Turbo

Postby Yoshi » Sat Jul 06, 2013 10:53 am

It'll get boring... trust me.
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Re: E30 325e to 325i Turbo

Postby Ryki » Mon Jul 08, 2013 9:01 am

-.- some of us would like to break the 200 whp range...
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Re: E30 325e to 325i Turbo

Postby Yoshi » Mon Jul 08, 2013 11:43 am

lol 250whp is fun. anything less is dull.
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Re: E30 325e to 325i Turbo

Postby MaikelK » Mon Jul 08, 2013 3:05 pm

I will do my best, haha
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Re: E30 325e to 325i Turbo

Postby blasphemy101 » Mon Jul 08, 2013 6:05 pm

Yoshi wrote:I still think you could have done the FMIC differently. I'm not fond of sharp transitions around corners. Works though. looks spiffy!


Isn't a sharp bend more efficient than a long one?
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Re: E30 325e to 325i Turbo

Postby blasphemy101 » Mon Jul 08, 2013 6:10 pm

87e30 wrote:Just wondering one thing though... Why so many welds in the exhaust? Why not bend it instead? Wouldn't the inside of the welds cause much more resistance than smooth bends? Would welds vs bends even make any difference in power whether turbo or NA? Even if it's not noticeable I would think there would be at least a little difference in the numbers.


With something like this, bends are probably preferable for looks, but I don't think the weld beads would have a detectable impact. Sure, they create turbulence, which might have an impact on SERIOUS N/A tuning, where you're trying to manage every little thing that affects exhaust pulses. Even then, 90% of that is all handled by the header. I doubt you'd be able to even see the effect of lots of welds on a dyno.

With a simple, large diameter downpipe->single exhaust setup, you're just trying to push the air out as fast as possible. This is the reason bigger = better for turbo cars, but not necessarily N/A ones.
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Re: E30 325e to 325i Turbo

Postby MaikelK » Wed Jul 17, 2013 9:48 pm

So,

This week i have vacation! Drove the first 1.8km to the gas station to fill her up, very slow because VE table isnt good yet!

Only thing to do is. VE table and swapping the diff for a 2.79 25% LSD

Fitted clutch and pressure plate, didnt had the right tools, put a socket, some M10 thread, 2 nuts and masking tape did the job.
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Removed some fly rust and primered it, this winter wil be a compleet paintjob.
https://lh4.googleusercontent.com/-4hjB ... AG1719.jpg

Fitted the engine with new engine mounts.

Lambda sensor, cable is fed through the rubber gromet under the fuse box.
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Boost press hose to Megasquirt 2 and AEM Wideband Failsafe Gauge.
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Stil didnt recieved my Magnaflow silencer, but we will wait a bit more
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Made a flange for the MAT sensor. My simple mind says that if the engine is running idle, cold air is Always drawn past the sensor.
So when engine is stopped, heatsoak accurs. But my thoughts are that in this way, cold air flows over the sensor, even in idle.

also a connection for the BOV has been made.
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Engine bay pics!
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And not to forget, a movie of the first few minutes of running in the car, little lompy, but it runs better now!

http://www.youtube.com/watch?v=iIwr-ZbAzOg
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Re: E30 325e to 325i Turbo

Postby MaikelK » Wed Jul 17, 2013 10:02 pm

Oh yeah, is also translated the update on the previous page!!
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Re: E30 325e to 325i Turbo

Postby Yoshi » Wed Jul 17, 2013 10:35 pm

huh. That's an inventive way to do the IAT sensor. Man I wish I could machine metal parts like that. I'd make so much money... to pay back the machinery and materials

Looks really good!
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Status: HG repair. 488wtq though!
MaikelK
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E30 325e to 325i Turbo

Postby MaikelK » Tue Jul 23, 2013 5:36 pm

Man, its like a rocket! Full boost between 3000-3200 rpm to redline! 0,6 bar atm.

Only thing is, 4th gear 200kmh with 4700rpm is no good. 130kmh what is allowed here is at 2700 rpm. So fly by someone you want to overtake puts you back to 3th gear all the time....

Bought a 2.79 Lsd few weeks ago. Emailed the Guy, if he wants to trade, we discussed it when i got it from him, told me this was much better then the 2,93 i requested. Now i want an 3,64 or 3,73lsd!!

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