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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #26  
Old 04-09-2011, 09:20 AM
turbo86 turbo86 is offline
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Mein Auto: bmw e30 318is
bmw m42 polished inlet manifold

sanded and polished. took about 5 hours to file, sand and polish.

think the combination of metalic black cam cover and the polished inlet look preety good.
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  #27  
Old 04-10-2011, 12:56 AM
RavenTheReaper RavenTheReaper is offline
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Mein Auto: E30 323i Coupe
needs more carbon fiber XD

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  #28  
Old 04-10-2011, 02:38 PM
turbo86 turbo86 is offline
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Originally Posted by RavenTheReaper View Post
needs more carbon fiber XD

this yours?
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  #29  
Old 04-10-2011, 04:46 PM
RavenTheReaper RavenTheReaper is offline
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nah, i just recon it looks fkn sexy
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  #30  
Old 04-21-2011, 01:12 AM
turbo86 turbo86 is offline
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finaly got my replacment alternator so i managed to finish the engine last week an wow what a massive improvment.
the engine feels so much more powerfull low down and up top.
it even sounds differant. sounds much smoother. im goin to upload a video onto youtube sometime soon.
iv just covered 200 miles on the rebuilt engine and replaced the oil and filter. so i can really push it that bit more now.

just to recap. lightened flywheel, balanced crank, rods and pistons. new bearings and rings, slightly increased compresion from head skim. re seated valves and polish. new valve steem oil seals. m44 cam gears like new. throtle bodie heater plate deleted.
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  #31  
Old 05-19-2011, 06:28 AM
turbo86 turbo86 is offline
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Mein Auto: bmw e30 318is
bmw m42 throttle bodies

pictures of my itbs.
used bmw k100 motorbike throttle bodies. 36mm in dia.
each throttle bodie has its own vacume nipple which will have vacume lines to a small seperate manifold for the fuel pressure regulator and brake booster.

each runner will also have nipples tapped in before the throttle bodies so i can still run the idle control valve.

inlet plenum is being made to fit with exhisting air box and air flow meter. with 2 nipples 1for cam cover breather hose which is run through a oil catch tank and 2nd nipple for idle control valve.
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  #32  
Old 05-19-2011, 06:57 AM
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noexceptions325 noexceptions325 is offline
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Mein Auto: 325e,Jeep,240z,528i
I like this plan ^
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  #33  
Old 05-19-2011, 10:35 AM
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Looks nice! Will you be putting a box to cover the ITB's? Or will you be leaving them exposed?

How do you plan on tuning with them.


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  #34  
Old 05-20-2011, 01:40 AM
turbo86 turbo86 is offline
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Thanks for the comments.
as for the throttle bodies they will be exposed. look so cool!
as for tunning im just goin to experiment with fuel pressure and maybe try some different injectors with slightly better flow rate.
will then at some point have the car dynod for fine tunning.
would of been nice to do away with the flap type air flow sensor but from what iv herd theirs no advantages other than looking neater and would cost alot of money.
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  #35  
Old 05-26-2011, 10:40 AM
turbo86 turbo86 is offline
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recent update

had the car out today running on throttle bodies and goes like a dream. much more responsive, and the power is supprisingly good low down.

will upload video to youtube when all is finshed of.
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  #36  
Old 05-26-2011, 03:35 PM
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downhiller downhiller is offline
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i would recommend smoothing out the intake. it just looks, bad. great work, just need to be more sleek if you get what i mean
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  #37  
Old 05-26-2011, 07:45 PM
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fcsteve fcsteve is offline
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besides how sketchy its made. that intake box is a horrible design
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  #38  
Old 05-26-2011, 08:39 PM
markseven markseven is offline
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Much respect for building your own ITB system
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  #39  
Old 05-27-2011, 06:17 PM
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INSANELY UNPREDICTABLE!
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Yes it will allow the #4 cylinder to recieve most of the air. The inlet tube should have been at least centered in the plenum.


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  #40  
Old 06-02-2011, 02:01 AM
turbo86 turbo86 is offline
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Location: derbyshire
 
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Mein Auto: bmw e30 318is
bmw m42 itbs

hi guys, you are right about the airbox design, the air flow will be slightly more restrictive for cylinder 1 and 2 but the airbox just seems to work fine, it was going to be just a tempory thing so i could get the car running with the maf. idealy the inlet wants to be centred between cylinders 2 and 3, maybe ill get around to make another one soon.

at the moment im playing about with the runner length as their is plenty of power mid range but want the power up high so the runners are going to be shortened to a similar length to those on the s52 engine.
cant believe you thought i would just leave the air box looking ike that.
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  #41  
Old 06-02-2011, 03:39 PM
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INSANELY UNPREDICTABLE!
Location: in my house
 
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Looks much better! Yes ideally the inlet would be centered between 2-3 but like you said u will get around to that. GL!


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  #42  
Old 06-09-2011, 06:22 AM
mmmm7 mmmm7 is offline
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Props to you for adapting the ITBs and building your own intake. You are more successful than 99% of those who dream about it - including me!

So how did you adapt the ITBs to the intake ports given that the M42 intake ports are shaped differently from the ITB ports?
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  #43  
Old 06-09-2011, 01:43 PM
turbo86 turbo86 is offline
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itbs

thanks again for the comments guys. to adapt the itbs to the runners from the cylinder head they were a pressed in fitt with rubber gaskets. only by chance did the throttle body fit very snuggly into the aluminium tube. i know that idealy the aluminum runners should be tapered from the itbs but hey.

could do with some help actualy, iv been having a few problems with setting up the tps and cant seem too get it set right. depending on how i have the tps it either cuts out at 2000rpm then picks up suddenly or if i have it adjusted the other way it limits at around 4500 rpm frustrating!

the car is soooo much more powerful till it hits 4500 then its just really slow. i really dont think its the length of the runners or the itb size not alowing enough air mainly because of the amazing amount of power so low down. i can only think the problem is a result of the tps.

tomorrow im going to get a battery for my multimeter and test my tps.

any help would be appreciated as maybe im overlooking somethin really obvious.
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  #44  
Old 06-12-2011, 12:36 AM
turbo86 turbo86 is offline
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fixed

got to the bottom of the problem, was the injectors that was playing up so switched them for some spares and they work fantastic. the car definatly feels up on power id say iv gained at least 10 bhp and more low down torqu but its difficult to say exactly without a dyno but it was definatly worth all the effort. the sound is just amazing!
also recently bought a magnex back box for a 10er and the sounds great.
really lovin everything about the car.
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Last edited by turbo86; 06-12-2011 at 12:45 AM.
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  #45  
Old 06-12-2011, 07:59 AM
markseven markseven is offline
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Quote:
Originally Posted by turbo86 View Post
got to the bottom of the problem, was the injectors that was playing up so switched them for some spares and they work fantastic. the car definatly feels up on power id say iv gained at least 10 bhp and more low down torqu but its difficult to say exactly without a dyno but it was definatly worth all the effort. the sound is just amazing!
also recently bought a magnex back box for a 10er and the sounds great.
really lovin everything about the car.
Great work. Do you have plans for a coil-on-plug setup?
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  #46  
Old 06-12-2011, 08:14 AM
turbo86 turbo86 is offline
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Location: derbyshire
 
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Mein Auto: bmw e30 318is
cop

will most definatly be doing a cop conversion soon, think my coils are abit bad so thats definatly on the list of things to do. be nice to get rid of the leads and ake it look clean with cop.
you done cop conversion before?
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  #47  
Old 06-12-2011, 08:45 AM
markseven markseven is offline
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Quote:
Originally Posted by turbo86 View Post
will most definatly be doing a cop conversion soon, think my coils are abit bad so thats definatly on the list of things to do. be nice to get rid of the leads and ake it look clean with cop.
you done cop conversion before?
No, but I have heard good things about it.
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  #48  
Old 06-16-2011, 08:07 AM
mmmm7 mmmm7 is offline
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Question pressed in?

Quote:
Originally Posted by turbo86 View Post
thanks again for the comments guys. to adapt the itbs to the runners from the cylinder head they were a pressed in fitt with rubber gaskets. only by chance did the throttle body fit very snuggly into the aluminium tube. i know that idealy the aluminum runners should be tapered from the itbs but hey.
Sorry for the many questions but I'm really interested in how you did this. I can't quite picture what you mean by "pressed in with rubber gaskets". Can you give us a pic of the itb setup from the intake side?

I'm not sure if I read it correctly but it seems to me that you had to reshape the itb and keep the join sealed via rubber gaskets. Am I right? What tool did you use to press the itb in?

Is the intake port spacing 100% correct or did you have to fix that as well?

Thanks!
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  #49  
Old 06-16-2011, 09:19 AM
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fcsteve fcsteve is offline
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you should use google and check out the 10,000 + other custom itb setups using cheap motorcycle throttles
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  #50  
Old 06-16-2011, 10:08 AM
turbo86 turbo86 is offline
hammer please
Location: derbyshire
 
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Mein Auto: bmw e30 318is
m42 itbs

hi mmmm7, ill get some pictures uploaded soon for ya to have a closer look.
to try and describe it better the outside diameter of the itb is about 38.5mm and the internal diameter of the aluminium runer is 38mm so i had to heat up the aluminum runner so it would expand anouth to press the itb into it. i also used a rubber o-ring to seal the end of the runner to the itb. it didnt realy need the o-ring but fought i may as well give it try.
also the spacing is exactly the same as the ports in the head.

i dont know if your intrested but i was thinking of making a couple sets up to sell.
if you was to be intrested i could make the the adapter plate with runners and the itb set up for around 250 plus postage. all that you would be left to do would be to make your own airbox. or i could do for an additional 70.

all i can say is id never go back now, the car revs like bike the rev counter can hardly keep up and theirs a definate power increase for sure. i know u probable would like to see a dyno chart but they work really well.

in my honest opinion id say its a given 5-10 bhp
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