BMW 635csi twin turbo or single turbocharger

[armboy1]

Hi.I have 1985 BMW 635csi and I want to instal a twin turbo or single turbocharger up to 800HP.Who can tell me from where I can buy twin turbo kit or single turbocharger kit.I live in US(if it helps).

[claylakem6]

Todd DAHate at Turbocharging Dynamics

[dcains]

Dreamer thread.

[Dash01]

The M30 is a very strong and excellent engine, but 800 HP? Your car would be a more than adequate monster with less than half that HP, yet still reliable.

And, why twin turbos, when this inline 6 has relatively simple plumbing, with lots of successful adaptation to a single turbo?

Consider the Miller setup, based on the experience of a fellow poster named Oxen, who has quite a bit of real world experience with a turbo Shark.

[armboy1]

Who can give me a website from were I can buy the single turbocharger kit.I looked in a few websites but I didnt find anything.I want change everything inside the engine so I need to buy full turbo kit.

[IB635]

Hell, I'd love to have a turbo and 350 hp... But I'm in CA, so I might as well ask for it to fly as well...

[dwal95008]

Who can give me a website from were I can buy the single turbocharger kit.I looked in a few websites but I didnt find anything.I want change everything inside the engine so I need to buy full turbo kit.
the very first comment mentions the man that runs the best site around for turboing your 6.

[MylesPH1]

Hell, I'd love to have a turbo and 350 hp... But I'm in CA, so I might as well ask for it to fly as well...

He's in Glendale CA, so he's in the same boat - or plane, in this case.

Armboy - if you're serious about an 800 HP 635, you'd be going fully custom, and it would cost you at least 10-15 grand, assuming you do the work yourself.

Personally, I think you'd have to go with a V8 swap to even get close to that number.

[BMW Performance]

You can buy a kit from tcd that will get you roughly 350~400hp. For 800hp you have to custom make everything and run roughly 35psi of boost. If you really want it done I know a shop that will do it but expect to pay $40k+ and it take them a year to build it.

[FernandoBunster]

With those HP figures you better consider everything in the drive train to be modified. And once that's achieved, you better modify the suspension or you'll wind up killing yourself.

[armboy1]

My father is a mechanic and he has some experiance with installing turbos.So I dont have to pay for labor.I also think that it will probable cost around $10k.

[dcains]

No chance, not for even close to $10K. And even with no expense spared, you'll never see 800HP, or even 500, reliable BHP from an M30.

[armboy1]

Ok.What about 400-500HP.Can I make it?

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Or I am thinking thaking out engine with transmission and put for example V12 BMW engine(750I or 760IL) or put V12 6.1 L doge hemi engine.

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Which one much better instaling turbo charger or puting new engine with much more power.

[dwal95008]

get a newer car if you want 800 hp. hell, a corvette would be perfect for you.

[1986series6]

Is this a late April Fool Joke?

[xing6666]

He's in Glendale CA, so he's in the same boat - or plane, in this case. Armboy - if you're serious about an 800 HP 635, you'd be going fully custom, and it would cost you at least 10-15 grand, assuming you do the work yourself. Personally, I think you'd have to go with a V8 swap to even get close to that number.

If I could have 800hp for 10-15k, I'd have it already. I think it would probably be 2x the high end.

[GazM3]

Hey.
The m30 is a pretty strong engine internally and could cope with 5-600bhp with a few small changes mainly using some good head studs and a MLS head gasket. Fueling and engine mapping is pretty important at that level of hp. Also get a custom manifold from tyat chap "good & tight". Witg a relatively internally std engine it's not a bad idea to have a relatively large turbo so it spools over a larger rpm band so a larger single turbo would be better than twins. Nothing really is in "kit" form and in an old e24 platform you are going to need to spend some time and money on suspension and strengthening up the chassis otherwise the rear subframe will rip away from the chassis.

As others have said TCD do a nice off the shelf kit for around 350-400bhp which is plenty for the e24 but even with a modest kit I would spend the money on the head gasket and studs. The amount of people who take short cuts in this area and end up having repetitive issues would make me spend the money as replacing the HG is a shit of a job

thinking outside the square up you were set on more than 800bhp is to buy someone's known car that already has this power most likely in the form of an e36m3. You could then directly swap the engine and accessories straight in

[alpinacsi]

Best bang for the buck: BMW CCA membership and club sponsored DE. If you have not done a few of these: it does not matter how much money you spend or how much power you have because anything more than mildly warmed will be a waste if you can't handle it. If you are just after bragging rights; throw a cheap turbo on and create your own dyno sheets. To build an e24 with power close to what you are asking: you will need to spend 100k or more if you want the car to last more than 2 min.

[jbd5015]

I think Julian hit 550+ HP in his car with about $75K+ invested, and hes owns a repair shop, and his engine tech is a close friend. He also puts in a gear box pretty regularly in that car. Hes also torn the diff mounts out of the chasis with this motor, and had to do some custom frame supports in order to stop twisting the car into a corkscrew.

youre undertaking an ambitious project and seem to be a bit ignorant to the process. check out the TCD website and hop over to MyE28.com and look around the turbo projects there.

[armboy1]

With $5000 (not including labor only parts) what turbo I can install and how much HP can I get from the car?

[IB635]

You're in california, I may be wrong, but I don't believe there is anything you can install that will be smog legal. If it's a track only car, then you're free to play (pay..)

[Rapido5]

With $5000 (not including labor only parts) what turbo I can install and how much HP can I get from the car?

as many people have already told you, check out turbo charging dynamics:

http://turbochargingdynamics.com/?wpsc_product_category=m30

there's also Miller Performance:

https://www.millerperformancecars.com/

All you have to do is google, or follow other members' advice. You keep asking the same question.

[ShapeShifter]

Why is 800hp the number?
I doubt the the rest of the driveline will support that kind of power.

[RVAE34]

Try searching instead of asking vague questions and posting nonsense. You need to be reading/searching in the forced induction section. And if you post in there like you post in here, be prepared to be ripped apart. They are a lot less forgiving and patient than the folks in here seem to be. You seem to want to answer your own questions and ignore the sound advice others are providing here. What you seem to want to achieve is impossible with your budget. It's probably even impossible with a budget 3-4x's of what you have.

[Layne]

You ("you" as in mankind in general, not the OP obviously) can build a turbo M30 with 800hp using 1 turbo, 2 turbos, pretty much any number. The reasons why people used to use 2 turbos are not very valid anymore with modern turbo technology, so most people would choose 1. But 2 would be fine. Makes very little difference. It's certainly not the one thing someone who doesn't know what they're doing needs to ask in order to accomplish the job. What do you need in order to accomplish the job? Years of experience. Buy a TCD kit and install it yourself, not get your dad to do it. Reverse engineer what TCD puts into the kits and fully understand how and why every part does what it does. Build another car without using a kit. And another. And another. By this time you'll realize that stating a desired HP number before you even begin is stupid and the easiest way to spot someone who has no idea what they're doing, but you'll probably be able to achieve 800hp.

[armboy1]

I have been searching almost 1 month.I need the full turbo kit but in all websites kits come with turbo and few other things.

[IB635]

You're in CA. If you drop $4000 on a turbo kit, and try and smog it, you'll be taking it off. I hate to ask, but do you have a license yet?

[Layne]

The cost of moving to a new state is a small fraction of the proposed build. I assume that's included.

[bkats]

I have been searching almost 1 month.I need the full turbo kit but in all websites kits come with turbo and few other things.

You really should sell the 6 to someone who is going to take care of it, and go find another chassis to turbo. The e24 is expensive to add power properly to.

If you need a full turbo kit, you probably don't know what you're doing enough to do it safely.

It doesn't seem like you are interested in listening or responding to the feedback you are being given, so I guess you are on your own. Please don't ruin the 6.

[GazM3]

Hey chaps. Prob would be nice to help the kid out.
Sometimes you underestimate someone new.
The m30 is probably one of the easiest engines to turbocharge. Especially in LHD.

The he only issue is the lack if a cheapass obx exhaust manifold.

[dcains]

Well, it seems like he's had plenty of help trying to convince him that 800hp is a rather unrealistic goal, and that with a budget of $5K, only mild hp gains can be had on an M30. Then there's the question of the condition of the motor, which is probably not great to begin with, and forced induction shouldn't be an option anyway. We've helped him not waste his money on an unrealistic and most-likely unsuccessful project.

[tschultz]

Here's some info on my current turbo project.

http://www.mye28.com/viewtopic.php?f=6&t=126432

But my hp goal of 250whp is quite lame compared to the lofty 800hp set by the OP.

[iziksun]

This is not mine. - http://sfbay.craigslist.org/pen/cto/4956674171.html It's a turbo euro that has even passed California smog!

[Layne]

This is not mine. - http://sfbay.craigslist.org/pen/cto/4956674171.html It's a turbo euro that has even passed California smog!

That is not smog legal. A 745i is euro-only, but those can be smog certified on an individual basis with the addition of a cat, O2 sensor, charcoal cannister, etc. At least back in the day, not sure if you could do it now. Then you could *maybe* swap that into a 6er with smog referee approval, if you meet all the rules such as the donor car being newer than the recipient, etc. Not really sure on that as I've only ever heard of it done with a fully CA approved engine, not an individually approved euro engine. So it's at least plausible up to this point, but now he's also modified the turbo system with an adjustable wastegate and fuel pressure regulator etc. Not allowed. There's not even a procedure in existence that would allow you to ask permission for such a thing, it must remain factory. If the mods were less obvious you could maybe skate by with it, but that doesn't make it legal. Probably none of the above scenario is true, and he's just paid someone off for the smog cert. I don't really care if people cheat the CA emissions system, but he's probably selling it because of the difficulty obtaining his last smog cert while implying that it's smog legal, thereby cheating the potential buyer.


On a different but related note, some aftermarket turbos were CA approved back in the day. The BAE/Century kit for E21's is one of them. Not sure if any were ever approved for an E24. If they were though, and you obtain the critical-looking parts to that system and the paperwork for it, you can usually skate by with a system that exceeds the original power output. Again, that's not "smog legal" but it works. No one with half a brain would care what's on your car if the emissions it spews are within spec, but unfortunately CA's government doesn't have half a brain between them.

[gamitavo]

Somewhere I read that BMWs are designed to take on 3 times the HP they have stock without serious modifications

[IB635]

I'm glad Layne chimed in on that. I couldn't for the life of me imagine a 'Test Only' center tech popping the hood on that and saying 'yeah, looks good'. I do wish they made a legal setup however, because it would be sweet.