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Underbody braces, turbos and more!

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PostPosted: Thu Feb 19, 2004 10:28 pm 
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this thread is for members to post first hand experience with different systems/solutions used for tuning a turbo setup ..
i'll try to move some of the old posts into this section, but please make sure you post only factual information, what you heard/read in the magazines doesn't count. :lol:
thanks :D

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PostPosted: Fri Feb 20, 2004 9:07 am 
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Finally......!

Well i have a microtech LT-8 installed on my car,
I am still tuning i had an initial run if 157whp and 140 ft.lbs torque .. but this was with a boost cut active.

i will post timing and fuel curves later.!


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 Post subject: MegaSquirt
PostPosted: Wed Apr 14, 2004 2:02 pm 
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Location: Reykjavik
I have a MegaSquirt system installed on 2 totally different cars, one turbocharged suzuki vitara and one Jeep with a N/A 400ci small block chevy.
To begin with the kits are cheap, parts cost for a board runs about $130 USD, $50 for a partial kit from the 'project daddies' and the rest for other parts from a different source. There are also some other options available, stimulator for bench testing the ECU, relay board for easier wiring and MegaView for a neat looking vacuum fluorescent or LCD display, more of a gadget than a tool really, but we all like gadgets don't we...
If you have experience soldering and such, you'll have no problems assembling the units, but there are people who sell preassembled units for the soldering impaired.
Tuning is done with a PC, using a serial port and various flavours of tuning software that run on all Windows versions and one program being developed for unix/macosx.
All the units come with a 250kpa MAP sensor (2.5 bar) that senses boost up to just over 20psi, a MAF is not used.
The user base is quite big, and the system has been installed on a wide variety of vehicles, and people are quite willing to give their help on the mailing lists.
Originally the system was designed as an easy way to convert a carburated car to fuel injection, hence it doesn't control spark timing but as the user base grew, quite a few code variations have been produced with lots of different features.
There's dual table code for running 2 sets of injectors mapped individually, that code also features rev limiters, launch control, PWM idle control, nitrous safety control (rpm window switch, temperature switch and throttle switch all in one), progressive shiftlight and experimental boost control.
MegaSpark uses standard megasquirt hardware to control spark with a distributor, but no fuel.
MegaSquirt'N'Spark controls fuel and spark with a distributor, plus it has 2 outputs that can be triggered by a selection of variables (rpm, coolant/intake temperature, throttle, MAP and some others). It also has a soft/hard rev limiter retarding spark and dropping fuel.
MegaSquirt'N'EDIS is derived from MegaSquirt'N'Spark, controls fuel and spark with a Ford EDIS wasted spark system.
Then there are some other variations floating around.
The fuel 3d map is 64 sites (8x8) with user configurable scale and linear interpolating between sites.
Fuelling is corrected by intake air temperature, plus warmup enrichments when the coolant is cold, all user configurable.
The default is to use GM temperature sensors but the software/hardware can be adapted to use other sensors.
Tuning is fairly easy and you can take datalogs with the laptop to diagnose.

I currently run my vitara with dual table code controlling fuel with 8 injectors, and rely on the stock ECU for spark. It works fine except the stock MAF is quite restrictive with 10psi boost and I plan to switch over to MegaSquirt'N'Spark soon and just run 4 large injectors so I can just completely remove the stock ECU. I've been running with this system since June last summer and I'm quite happy with it.
The Jeepster has a 400ci small block chevy motor from a 70's Chevy Nova, the motor is all stock except the high compression pistons (9.8:1), slight overbore and an Edelbrock Torker II intake manifold modified for fuel injection, using a gutted carb for a throttle body. Running MegaSquirt'N'Spark only controlling fuel so far, with a recurved HEI ignition for spark until we get another HEI to convert for using with squirtnspark. The motor pulls quite well with this setup, throttle response is good and economy looks promising.

See
http://www.bgsoflex.com/megasquirt.html
http://www.megasquirt.info


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 Post subject:
PostPosted: Mon Apr 19, 2004 2:53 pm 
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well here is my timing map it need some adjustment but so far so good

TIMING values

RPM Vacuum \ Boost (psi)
-24 -18 -12 -6 0 2 4 8 10 14
Idle 15 14 13 12 11 10 10 10 10 5
1000 20 19 18 17 16 15 15 15 15 10
1500 23 22 21 20 19 18 18 18 18 13
2000 25 24 23 22 21 20 20 20 20 15
2500 27 26 25 24 23 22 22 22 22 17
3000 32 31 30 29 28 27 27 27 27 22
3500 33 32 31 30 29 28 28 28 28 23
4000 33 32 31 30 29 28 28 28 28 23
4500 33 32 31 30 29 28 28 28 28 23
5000 35 34 33 32 31 30 30 30 30 25
5500 35 34 33 32 31 30 30 30 30 25
6000 35 34 33 32 31 30 30 30 30 25
6500 35 34 33 32 31 30 30 30 30 25
7000 35 34 33 32 31 30 30 30 30 25
7500 35 34 33 32 31 30 30 30 30 25
8000 35 34 33 32 31 30 30 30 30 25
8500 35 34 33 32 31 30 30 30 30 25


Last edited by GtiT on Tue Apr 20, 2004 9:08 am, edited 1 time in total.

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PostPosted: Mon Apr 19, 2004 2:53 pm 
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this is my Load map
The load values are in mS injector open time..


Vac/Bst Load Map (mS)
-30 = 1.00
-24 = 1.14
-18 = 1.48
-12 = 1.86
-6 = 2.76
0 = 3.00
2 = 4.67
4 = 5.43
8 = 6.14
10 = 7.33
14 = 7.81


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 Post subject:
PostPosted: Mon Apr 19, 2004 2:57 pm 
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as you can see i have a max timing of 35 degrees off boost and 25 degrees on full boost


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PostPosted: Sat Apr 24, 2004 11:12 am 
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ok here is some of my timing maps .... not sure which one that i'm going to use thou...
these are some valus i'm experimenting with

Image

my current timing map
Image


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PostPosted: Sat Apr 24, 2004 3:51 pm 
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Location: Reading, UK
Hi, GTiT how much was this ecu you have?

thanks

I.


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 Post subject:
PostPosted: Sat Apr 24, 2004 4:20 pm 
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i have the LT-8 which cost about u$950 but prices may vary ..
check the web site for more info
http://www.microtechefi.com


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PostPosted: Sat Apr 24, 2004 7:01 pm 
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All i need is an ECU with anti lag but i dont want to spend 3k on a motec. And yes i know it will distort the thrust housing on the turbo and yes i know it can cause the manifold to crack, but hell you only live once.

I thought this LT8 had anti lag, but i saw it doesn't or am i just confused :lol:

Does anyone recommend the Haltech ECus?

thanks for the reply btw.


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 Post subject:
PostPosted: Sun Apr 25, 2004 9:54 am 
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No the microtech doesn't have anti lag..!

Haltech are good but you will be geting more and more expensive.... what about the AEM ....have you checked that out?


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PostPosted: Sun Apr 25, 2004 8:46 pm 
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Sorry what is the AEM? Yes haltech is expensive, i think 1000 uk pounds.

I am not in a rush so i will continue to look until i get a good price.
Thanks for the help GTiT, i appreciate it. :)


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PostPosted: Thu Jul 08, 2004 6:12 am 
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well i'm not sure if its because i'm using a stand alone but i do not have a fueling problem with my fuel rail like other turbo charged members ...

I've noticed that i'm still running very rich and i still have the stock big hollow looking manifold...

I'm running 4AGZE 365cc injectors....


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PostPosted: Thu Aug 05, 2004 11:51 am 
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Location: Brabant
register yourself on the perfectpower website and you can download the wiring diagrams.


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PostPosted: Thu Oct 21, 2004 8:09 pm 
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I would like to hear from some of you guy what your ignition timing is ..

I'm considering a daual stage boost controller so that i can run 6psi on low boost and 15psi on high boost.

This will help me to have less wheelspin offf the line when i drag race.

Now i currently run a maximum timing of 34degrees at full boost (15psi)

How does that degree compare with you other guys out there?


I was also thinking of advancing timing on the low boost setting and then begin to retard at say 10psi boost ..... this way i will have good responce at low boost and i will still save the engine at high boost ..

The stock GTi runs a max timing of 32 degreees at full throttle and about 6500RPM and above.

I want to hear your feed back on this especially from you stand alone guys out there.

BTW - in case you don't know i'm running water injection also :evil: :twisted: :roll:


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PostPosted: Sun Oct 24, 2004 2:24 pm 
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There is also the tuning method of ramp down to boost, then ramp the timing back up after peak torque to keep power from falling off.

Couple ways to tune - more timing, less boost or less timing more boost.

Looks like fairly high timing values though. Have you verified those are actual crank degrees?

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PostPosted: Sun Oct 24, 2004 2:45 pm 
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GtiT\";p=\"78441 wrote:
Now i currently run a maximum timing of 34degrees at full boost (15psi)



Woops i'm sorry i made a mistek i checked the timing values yesterday it not 34 degrees undser full boost its actuallly 24 degrees :oops:

Those timing figures are the values that i'm getting from the hand controller display for the Microtech ECU

I currently bought a turboXS dual stage boost controller, so i'll be adjusting the timing curves for a better and somewhat more aggressive curve on the dyno...as the water injection helps me to run high timings.

But whatthee i'm still interested in what would you consider to be a good timing curve on a gti motor.


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 Post subject:
PostPosted: Sun Jan 16, 2005 8:42 pm 
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Location: Jamaica W.I.
Here is my ECU dat in excel form.

REmember only use this data as a tuning tool what works for me may not work for you.
Use these values only as reference as i am not responsible if your engine goes BOOM.

Alot of things will make a difference in each of our set up
Location
TEmperature
Fuel quality
Engine Condition
Oil Viscosity
Spark plugs

And the list goes on... so remember only as REFFERENCE


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 Post subject:
PostPosted: Sun Feb 06, 2005 4:16 pm 
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Location: ste-marcelline de kildare
megasquirt with msnsextra code have anti-lag,


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PostPosted: Sun Feb 06, 2005 6:12 pm 
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Well it doesn't have rally style anti lag but it does have launch control which kind of works like anti lag for drag racing, and it has nitrous control that can enable the nitrous within a pressure window (ie come on at 80kpa and go off at 200kpa for example)


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 Post subject:
PostPosted: Thu Mar 17, 2005 10:55 am 
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Location: Bristol
Hi, I am using an Omex 700 ecu it has anti lag, launch controll and much more. It has almost to many functions.


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 Post subject:
PostPosted: Tue May 10, 2005 6:59 am 
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Location: Adelaide
I use Autronic and have set up many systems on different motors. We currently have 2 off road buggies running Cultus G13B's and a Nissan V6 turbo running one also. I have set them up on Mitsubishi V6 motors both turbo and N/A. There are many options such as auto tune, traction control, anti lag & direct fire CDI to name a few. Systems come with loom, and air temp sensor and quite easy to wire up.

Michael

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 Post subject:
PostPosted: Mon Jun 13, 2005 7:21 am 
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you could have a real anti lag whit ms... ms could have up to 90deg of timing...you dont need this, so you could set your triger to have 50deg btdc and 40atdc ,tell ms your triger is at 90 deg, do the math , remove 40 deg to have the real timing and you use the 2 spark map/fuel map,whit a switch to activate anti-lag . the idle switch open a solenoid and triger ms


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