Guest reckless Report post Posted March 13, 2004 yeah hey finally a bmw site in the mighty nz. yeah i want some info on building a turbo mainifold for my 325i. and any other info any one can give me on turboing my beast. Quote Share this post Link to post Share on other sites
*sic 1 Report post Posted March 13, 2004 read my F.A.Q on turbo's.. have fun Quote Share this post Link to post Share on other sites
Guest Speedye30 Report post Posted March 13, 2004 Hate to be the wet blanket, but I don't know how well the m20 (let alone an old m20) responds to the stress of forced induction. Granted it is sortof strong... If I liked boost, (and wasn't so poor) I'd get an engine which already has a turbo like an sr20det. Having said that here is a pic of a modded 325i convertible with a custom turbo setup. Good for ~275hp, nice! Quote Share this post Link to post Share on other sites
E30-323ti 66 Report post Posted March 13, 2004 good to see another WGTN person here. What type of manifold are you after!?!? I'd recomend a "log" style manifold for 2 reasons: 1. Ease of construction, thus cheap (esp if you are doing it yourself) 2. Doesn't take up heaps of space, remember the steering column is on that side of the engine bay!! Have you got the turbo, ECU, fuel system sorted?? Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 13, 2004 Speedye30 - they hold up well to boost even after so many ks. Mine has had a rebuild and i'm going to try run 10 lbs perhaps 12 if all goes well. There are lots of old m20s out there turbo. The "log" manifold is very cheap around 300 - 400 depending who you go to. Go to the same person for all your tubing needs. Just get a machine shop to make up the plate which mounts to the exhaust ports. I think you may lose a little power with such a basic manifold design - but hey the blower is there to make up for that Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 13, 2004 FYI: Pic of log manifold - nice tidy setup. Quote Share this post Link to post Share on other sites
Guest Spargo Report post Posted March 13, 2004 (edited) www.proturbo.fi www.bavariacars.com.au also, see www.r3vlimited.com for a couple of members there with turbo M20's. This is a ProTurbo.fi manifold adaptor: Edited March 13, 2004 by CiLK WuRM Quote Share this post Link to post Share on other sites
Guest Spargo Report post Posted March 13, 2004 here is their replacement manifold. Quote Share this post Link to post Share on other sites
speakeasy 0 Report post Posted March 14, 2004 Hate to be the wet blanket, but I don't know how well the m20 (let alone an old m20) responds to the stress of forced induction. Granted it is sortof strong... If I liked boost, (and wasn't so poor) I'd get an engine which already has a turbo like an sr20det. Having said that here is a pic of a modded 325i convertible with a custom turbo setup. Good for ~275hp, nice! go the supercharger! blow off valves are overrated anyway... Quote Share this post Link to post Share on other sites
*sic 1 Report post Posted March 14, 2004 overrated? yea if you use them as a skank whistle they are, they are needed for the live of the turbo... Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 14, 2004 Sam, they make a nice manifold - but it ain't really worth it.. so pricey.. when you can have the cheap manifold here. Quote Share this post Link to post Share on other sites
Guest reckless Report post Posted March 14, 2004 hey guys this is great i am just tossing up weather to go n/a or turbo. cos i love my beamer and dont really wanna sell it but i want some thing with a bit of wow factor, and im a bit of a speed freak, Quote Share this post Link to post Share on other sites
Guest reckless Report post Posted March 14, 2004 andrew the pic of the log manifold is that just a modified factory one? and ive read some where that i could use a standard ecu? Quote Share this post Link to post Share on other sites
*sic 1 Report post Posted March 14, 2004 i wouldnt recomment using the standard ecu.. not worth the hassle.. do it once do it right. Quote Share this post Link to post Share on other sites
Gus 5 Report post Posted March 14, 2004 i agree with sic...no point in running standard ignition as boost possiblities would be very limited....better to go to a link or similar unit......speed freak? imagine how fast a turbo 325 would be.....from what andrews been telling me......180kw@10psi..... Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 14, 2004 andrew the pic of the log manifold is that just a modified factory one? and ive read some where that i could use a standard ecu? No - thats a completely different manifold (obviously). I think you might be thinking of the 2 into 1 adaptor - which is also an option. Is your car are a "real" M325 - i.e does it have the high compression pistons - this might upset your turbo project somewhat. If you have Motronic - you can use the stock ECU - but you won't make big power. The ECU just doesn't learn fast enough. Its much better to have tuneability anyhow. There are a few 180kW 325i turbos out there - although reading some more i'm quite sure this is a flywheel estimate. I'm aiming for 120kW at the wheels on low boost - we'll see what the motor can later this year. Quote Share this post Link to post Share on other sites
gmccormack 0 Report post Posted March 14, 2004 Check out http://home.att.net/~jroal/jay/bmw.htm for the most budget turbo conversion ever Quote Share this post Link to post Share on other sites
Viking 0 Report post Posted March 14, 2004 What about gearboxes, would a stock E36 5 speed auto or a sotck E30 auto turn to slush when turboing or supercharging? Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 15, 2004 What about gearboxes, would a stock E36 5 speed auto or a sotck E30 auto turn to slush when turboing or supercharging? Don't know about the slushbox - but the Getrag 260 is good for at least 350 - 400 hp based on some cars running that. Quote Share this post Link to post Share on other sites
Guest reckless Report post Posted March 15, 2004 andrew roughly how much $ did you turb your wagon for? and can you suggest any one to fabricate the manifold? i might have to check to see if is a genuine 325i it was nz new so i think it wus have every thing else bar the msport motor(bmw are pretty new to me im still learning) i decided to up grade for japanese. you cant beat euro engineering. Quote Share this post Link to post Share on other sites
Viking 0 Report post Posted March 15, 2004 Don't know about the slushbox - but the Getrag 260 is good for at least 350 - 400 hp based on some cars running that. Thats what I like to hear, I'm starting to smell the signs of a project car come next year. Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 16, 2004 andrew roughly how much $ did you turb your wagon for? and can you suggest any one to fabricate the manifold? i might have to check to see if is a genuine 325i it was nz new so i think it wus have every thing else bar the msport motor(bmw are pretty new to me im still learning) i decided to up grade for japanese. you cant beat euro engineering. Turbo isn't done yet - the plan is and rough costs install Link ECU (in about 3 months) for $2000 - 2500 - this will remove stupid L-Jet and allow tuneability + remove the AFM. Then .. turbo from a SR-20-DET (I think T28) i'm still unsure on the turbo - expecting to pay anywhere up to a grand for that. Manifold - 300 - 400 Piping - depends who does it Intercool 2nd hand - up to 500 Misc costs - 500 (connectors blah blah beer for helpers) I'll be in welly for the ECU install - and maybe the turbo install also - so you can have a looksie then. Quote Share this post Link to post Share on other sites
Guest reckless Report post Posted March 16, 2004 true that would be cool, the pic of the manifold you posted was that a forged one? or just a one fabricated out of pipe? Quote Share this post Link to post Share on other sites
Guest reckless Report post Posted March 17, 2004 what about oil supply to the turbo any ideas? Quote Share this post Link to post Share on other sites
Guest Andrew Report post Posted March 18, 2004 true that would be cool, the pic of the manifold you posted was that a forged one? or just a one fabricated out of pipe? Its a bunch of tubes welded together - easy to make (if you can weld) Quote Share this post Link to post Share on other sites
