boost control ?

[iKst]

Hi,

i probably read all the turbo related threads on this forum in last couple of days, but dont remember reading anything about boost controlers.

How do you limit boost for low press. turbo conversion (to around 6, 7 psi). Do you need to tweek wastegate or actuator or do i need some kind of boost controler (dawes device or similar).

[e30_Turbo]

Are you going to use MS?

Boost control via a solonoid is poss other wise standalone boost controller or adjustable wastegate.

Bleed valves are iffy, some work well, others not so well. Mine gave me boost spikes on the internal gate.

HTH, Mark.

[Turbo-Brown]

Nice thing about having a boost controller for a low boost setup is that you can set the wastegate really low, 4psi say, and then let the controller up the boost in a predictable manor.

Also, if it fails, it fails to safety so you only get the wastegate setting of 4psi and not an engine grenading 2bar or something

[iKst]

Ill use FMU for now.

I dont like bleed valves, they do cause spikes. Dawes device on the other hand holds steady boost, but i dont think you can lower the boost below actuator settings. Or am i wrong ?

Electronic boost controler is not an option, too expensive.

[Turbo-Brown]

Ooooh, not keen on those FMU things from what I've heard. Don't give any real fine degree of control over anything

An MS and spark thing (or any decent programmable ECU) will really unleash the potential of your setup

[iKst]

I know standalone fuel management is a way to go...but its too expensive for me at this point (student life sucks )

[Ant]

a decent RRFPR like the aeromotive unit will be in excess of Ԛ£250 with the parts required to alter the rising rate from 8:1 to around 15:1 iirc

MS is not that much more for the basic setup to run the single coil

Dude, why not get a kit and solder it yourself to save cost ? will be waaaaaay cheaper than an FMU and a proper job from the outset.

mapped boost control rules, you can set the gain anywhere you like, load/boost, rpm/boost any combo you can dream of, indeed using the RPM based traction control and maped boost control would result in a very streetable car, if a nightmare to set it up 100% perfect, but thats time, not Ԛ£Ã”šÃ‚£ issues.

food for thought ?

[iKst]

are you talking about kit like this ?

http://cgi.ebay.com/ebaymotors/MegaSqui ... enameZWD2V

If i understand this right MS will give me an option to control boost (i obviously need some kind of solenoid) and i will be able to run more boost safer.

How does this work. Do you get some basic maps to start with etc ? How hard is it to solder MS together from a kit. I have some soldering expirience from computer overclocking but i wouldnt say im very good at it.

[Ant]

the Ms will need fully soldering and testing but its not a bad job, steady hands, good eyesight and about 6 hours should see it done and dusted, as std the MS will have no map on board, the processor will have code upon it, but the rest is a blank sheet ready to take any settings you desire to put inside

to add the boost control another TIp444 transistor is required and some internal mods also

I can offer a custom built and tested unit to suit your needs if you wanted, not @ $195 though

you dshould have a PM in response to yours BTW

[e30_Turbo]

I built my V3 in about 8hrs and I'm no techie!

Was worth it for the inside knowledge and basic understanding of the unit, although wasn't worth the bad infected finger I got from stabbing myself with the hot soldering iron!

HTH, Mark

[cplagz]

Ant, you are using MS as electronic boost controller? I haven't seen many threads on people who are doing so successfully. I would prefer to use my MS V3 as opposed to forking out 200 quid+ for an EBC.

[iKst]

I built my V3 in about 8hrs and I'm no techie!

Was worth it for the inside knowledge and basic understanding of the unit, although wasn't worth the bad infected finger I got from stabbing myself with the hot soldering iron!

HTH, Mark

I know i will be able to put it together somehow...if not by myself i have friends who can solder etc.

I just dont know if its really worth the money. I can get FMU for less than 100 usd and i wont run more than 6, 7 psi (anything above 200hp will make me very happy). I will probably have problems with tuning this thing also.

Ive seen posts of people who run even 10psi and over 250hp without electronic fuel management. I dont really see a good reason to get MS (for this level of tuning), its more expensive, more complicated and i will get the same power from the engine.

[Gunni]

You need to look further into the future,

200hp will only be nice for so long,

also looking at max power figures to determine if one solution is better then the other is silly,
a standalone will ALWAYS be a better solution , as you can fix any funky sort of power loss or similar, while beeing stuck with the FMU you canԚ´t tune anything

[iKst]

Do you guys use MS to manage fuel and spark ?

What advantages over FMU do i get if i only use MS for fuel management and leave spark to stock ECU ? I wont be able to retard timing right ?

I would also like to know what is the difference between MS 2.2 and 3.0. I saw that 2.2 kits sell for 140 usd and 3.0 kits sell for 190 usd. Is 3.0 worth that extra 50 bucks ? What else would i need to install MS to E30 if i opt for this kit and assemble it myself ? I have an M50 TPS, MAP sensor is included...Do i need wideband lambda ?

[Gunni]

You should simply go ahead and get a standalone with ignition and fuel tuning,
trying and trying to get around it is futile, just get that and be done with it,
or if you want you get get a piggyback unit that can support ignition tuning

[carpmart]

Hi All

New to this forum but thought I would thro in my two pence worth!

I think for the 80 quid investment you can't go too far wrong using a turbosmart boost control valve. It has provided a very consistent level of boost control for me for nearly a year on a forced induction ford based engine which I am running in a kit car. It prevents any wastgate creep so quick spool up and i am running a very consistent 10psi peak 9 psi held. Very progressive click adjustment until you reach the desired boost level. Also very easy to adjust when you want to have a little more boost for a while. I had mine rolling roaded and cause i am running my turbo with twin 45 dellorto's I have not so much control of fueling on and off boost. I checked all through the rev range to make sure I wasn't leaning out on my standard 9psi set-up. I then did the same progressively all the way up to 15 psi before I leaned out to a point which I was not comfortable with. The good news is that 8 cicks adjustment on the turbosmart valve now gives me 14psi when I want it. I now have a bullet proof day-to-day set-up and a track day hooning set-up up all from a valve costing me about 80 quid!

There you go!

Bloody long winded but try a turbosmart valve!

Sure you can go down the sophisticated route for boost control but I like to keep everything as simple as possible!