Turbo setup with no boost?

[bigmansm]

I want to rebuild the engine while i install everything onto the car, but i want to break in the new internals for about 2,000 miles with no boost.

Question: Is it possable to have an installed turbo system and run no boost on it, even though the turbo may be spooling up?

[ne0]

You can put a low pressure turbo in that is constantly spooling up and running, but I'm not a total expert on this, anyone else know for sure?

[hammerfang]

wouldn't that be bad for the engine, having the engine used to no boost and then have boost, thats just my $.02

[5speed300]

Why not just run the motor with the stock exhaust system. ie: no turbo. Ive heard of a few people breaking in their F/I engines without having the supercharger/turbo installed. It may require some special tuning for the lower compression though.

[bigmansm]

Well i was hoping to not have to do 2 dif. installs.

it woudl be soooo much easier to isntall all the turbo components with the engine out of the bay, thats all.

It seems like there is no way around it.

[NickG]

If you're using an external wastegate, just leave the wastegate off and plumb the dumptube directly into the downpipe. That should provide for minimal boost.

[orijinal_poser]

no, theres a bunch of guys on here who did turbo installs and i'm pretty sure most of them did it with the engine in the car

[ne0]

dude just go ahead and put your desired turbo kit in, I don't understand why you're hesitating and feel like you need to break the engine in. When the new turbo is in, don't drive it hard, or get a boost controller and set it to like 4 psi or something.

[EpDarks]

2000 miles is overkill for any break-in. Just tow your car to a shop and get it tuned right away, boost and all.

[bigmansm]

Im anal about proper break in. Bavarian Auto. said that there is no break in time on the Total seal piston rings, but i just feel like it is a wisier idea. I think Ill run low boost.

[stimpee]

What turbo setup are you planning on running?

[bigmansm]

Actually steve, i ahve seriously bee debating between twinscrew and turbo. One reason i want the turbo is the torque. I dont think bmw have enough torque so i thought the turbo would be a great modification. I also like that the cam will be great if i was left stock and the diff. woudl be changed to a lower ratio which would help ym gas mileage, Although those are smaller details.

p.s. to steve, Ill have your info. in the next few days

[Phoenix2005]

Originally Posted by bigmansm

I want to rebuild the engine while i install everything onto the car, but i want to break in the new internals for about 2,000 miles with no boost.

Question: Is it possable to have an installed turbo system and run no boost on it, even though the turbo may be spooling up?

I don't know how your tuning is set up, if it is dialed in yet or if it's all new and you will be tuning as you go. It is imperative that you break the motor in correctly the first time. If your too rich you'll wash the cylinders and end up with high cylinder leakdown. If your too lean you will have equally disappointing results. Running boost or not running boost is not going to make or break your setup. Just lower the boost and don't redline the motor. Keep it under 5000 rpm. Moderate loading of the motor is needed to seat your rings.

I recommend you go to a website of one of the leading ( Federal Mogul, Hastings, Total Seal, Deves,TRW,etc) piston ring manufacturers and read up on seating the rings etc. Most of the piston manufactures will have initial break in procedures as well.

The rest of the internals, assuming everything is right, is not as critical as seating the rings correctly the FIRST time. Be sure your (break in) sw calibration is correct.