Couple of turbo questions

[Avus_325is]

I'm planning a mild setup for my first step into forced induction. I want to do a FMU set up since I don't have another vehicle to be able to have alot of down time or tons of cash to go with MS and tune it.

I was wondering how people have been retarding the timing or if it will be ok on stock timing if I just run stock boost. Also what FMU is best to use?

[808BMW]

Re: Couple of turbo questions

I was wondering how people have been retarding the timing or if it will be ok on stock timing if I just run stock boost.

http://www.msdignition.com/tc_18.htm

IIRC Todd at TCD (turbochargingdynamics.com) has a chip for slightly larger injectors, and it retards the timing at higher rpms.

Also what FMU is best to use?

http://www.bellengineering.net/Pages/products_FPR.html

[bmwdude]

Re: Couple of turbo questions

I'm planning a mild setup for my first step into forced induction. I want to do a FMU set up since I don't have another vehicle to be able to have alot of down time or tons of cash to go with MS and tune it.

I was wondering how people have been retarding the timing or if it will be ok on stock timing if I just run stock boost. Also what FMU is best to use?

If you stick to a FMU, small air to air intercooler setup, and NOT anything over 8psi of boost, you will be ok with your stock timing by a fairly safe margin. I do not know what you mean by stock boost though. If you want the ultimate mild setup, with durability and reliability in mind, stick to 5.5 psi, with a T3/T4 hybrid, air to air intercooler, stock injectors, stock ecu with stock chip, and timing(but use 92+ octane nevertheless), and you will be ready to go with 230-235 flywheel hp and 235-240 ft pounds of torque. All this bearing in mind of course that your engine was well tuned before the turbo install. As for best fmu, I'd go with a BEGI/Cartech rising rate fuel pressure regulator. The BEGI is the same unit as the Cartech one, both having been designed by Corky Bell. I may be selling mine in a few weeks should you be interested in a cheaper alternative. I'm selling mine because I'm going with stand alone engine management.

[PeterCip]

Re: Couple of turbo questions

If you stick to a FMU, small air to air intercooler setup, and NOT anything over 8psi of boost, you will be ok with your stock timing by a fairly safe margin. I do not know what you mean by stock boost though. If you want the ultimate mild setup, with durability and reliability in mind, stick to 5.5 psi, with a T3/T4 hybrid, air to air intercooler, stock injectors, stock ecu with stock chip, and timing(but use 92+ octane nevertheless), and you will be ready to go with 230-235 flywheel hp and 235-240 ft pounds of torque. All this bearing in mind of course that your engine was well tuned before the turbo install. As for best fmu, I'd go with a BEGI/Cartech rising rate fuel pressure regulator. The BEGI is the same unit as the Cartech one, both having been designed by Corky Bell. I may be selling mine in a few weeks should you be interested in a cheaper alternative. I'm selling mine because I'm going with stand alone engine management.

I agree with everything said here except the turbo. I would suggest a T3 60 or super 60 trim for 5-8psi. no need for the hybrid for such a low boost application. But some may argue..5.5psi for an m20 will stick you right in the fat of the super60 compressor curves..

[Avus_325is]

Yea i've been reading alot more lately and have decided to stick with stock timing for now. I am going to go with a bigger injectors though, since I've heard for years that the stock ones lean out at around 200 hp. I actually just picked up a small front mount from a buddy of mine that was running it on his 2.0L 16v turbo VW. It's basically generic with different end tanks. I also got a slightly used T3 60 trim for 100 bucks. No shaft play, spins freely, from a reputable VW tuning shop in Baltimore. I'm still not sure about running various lines but I figured at these prices why not, I'll need them eventually.

[bmwdude]

Yea i've been reading alot more lately and have decided to stick with stock timing for now. I am going to go with a bigger injectors though, since I've heard for years that the stock ones lean out at around 200 hp. I actually just picked up a small front mount from a buddy of mine that was running it on his 2.0L 16v turbo VW. It's basically generic with different end tanks. I also got a slightly used T3 60 trim for 100 bucks. No shaft play, spins freely, from a reputable VW tuning shop in Baltimore. I'm still not sure about running various lines but I figured at these prices why not, I'll need them eventually.

But they shouldn't lean out with a FMU. What you heard was for NA engines with no FMU.

[turboe30]

The stock injectors are way too small and 5.5psi will barely overcome the exhaust restriction. Take it from a guy who has a turbo e30, and has in the past used an FMU.

Your best bet IS to go for the megasquirt.. I use it and it rocks. I've been using stock timing with 16psi and 94octane with no problems... but I have a perfect fuel curve with MS.

I would say run 10psi at least to get some usable power out of the motor.
24lb injectors and an 8:1 or 10:1 FMU will work. You don't need a chip.

Be sure to adjust the AFM so that the ECU does not "learn" the injectors.

MS Tuning - it isn't that hard. In fact there are base maps you can use that will work with your turbo and get you running right away.

[Ravins]

What A/R size would you use on the super 60 .48 .63 .82