OK need a list for boosting the aveo

Brian5475E · Post by **Brian5475E** » Tue Jul 11, 2006 1:45 am

I was thinking about boosting the Aveo low boost (5psi) What would I need to do to make this run with out blowing up the engine. I'm gonna make an adapter plate for the stock maifold and put a t25 on it. now on the map sensor will it beable to handle it? Also fuel since the Aveo has a returnless setup, what needs to be done anything? my step brother who does nissans,(sr20det's) says I may not need to do anything to the fuel at low boost. What about timing?

So here is my list so far

1. T25 turbo
2. manifold
3. BOV
4. A/F gauge
5. Wide band O2
6. small I/C
7.oil lines
8. sandwhich adapter for oil filter relocate kit
9 SAFC2

what else do I need. Also is the Aveo MAP a 1 bar MAP? because when I used my SAFC when it would kick the VGIS at 4k it would show .5 psi for a second.

Post by **PrecisionBoost** » Tue Jul 11, 2006 3:17 am

Stock 1 bar MAP sensor will not handle boost....you need to install a check valve to ensure that it only ever gets vaccum

Nothing needs to be done with the fuel system.... returnless is fine up to 300whp

Ideally you need a 1:1 RRFPR (rising rate fuel pressure regulator).... for every 1psi of boost the fuel pressure will go up 1psi to give you more fuel.

Now.... this may indeed be a big problem with the returnless regulator system.... I'm not that familiar with returnless systems.... but I will be soon as my Optra5 is also returnless.... I'm not sure which companies make RRFPR that work with returnless systems..... I was going to investigate a Dodge Neon/SRT-4 as I belive they have a returnless system.

Both Timing and fuel needs to be controlled.... ideally you might want to go with a piggyback unit.

Using a SAFC will work... but as you change the map signal it will changing the timing ( making it worse )

To compensate you may want to look at an aftermarket system with "boost retard" so that you can have it retard the ignition as boost increases.

I've been thinking about a few different ways to control fuel..... I had this thought to use a 2bar sensor in place of the 1bar sensor.

Now.... this means that at 0psi boost (atmospheric) the 2bar will only give out a 2.5V signal (roughly) where as the 1bar would normally give out nearly 5V

As such.... the ECU will run really lean.... even when boosting it will still think it's seeing vaccum

My thought on this is to simply install larger injectors based upon estimated difference in reading ( say 30% larger injectors) and then use the SAFC to smooth everything out.

It's hard to say if it will work..... but I want to try it at some point.

There are lots of little things on the way..... but overall turbo installs are not that complex.... the hard part is making all the electronics happy and figuring out how to get the A/F ratio exactly the way you want it.

Brian5475E · Post by **Brian5475E** » Tue Jul 11, 2006 3:28 am

Thanks. I was thinking emanage ultimate for timing and fuel. Yeah I was reading, look like the srt guys use a bigger fuel pump

Post by **PrecisionBoost** » Tue Jul 11, 2006 4:08 am

emange would be good..... lots of flexibility

GsiTurbo · Post by **GsiTurbo** » Tue Jul 11, 2006 5:22 am

I will be using hybrid of e-manage Blue (with secondary MAP sensor) to control fuel/timing. Boost is controlled by Profec E-01. This one, on the other hand, will display info regarding wideband A/F, injector pulse, oil pressure ...and I can hook up one more thing to it hehe... cant decide. Profec also works as voltage clamp for the factory MAP (together with check valve to prevent mechanical damage) In your case, the ultimate edition may be a bit of an overkill for its price, but besides that its awesome. Two features I particularly like about it are the target A/F (helps keep set air fuel ratio under boost, and improves cruising MPG), and quick program switching.

Brian5475E · Post by **Brian5475E** » Sat Jul 15, 2006 10:15 pm

I figure this will take care of fuel instead of using a larger fuel pump or rrfpr http://www.jegs.com/webapp/wcs/stores/s ... ryId=10767

I was also thinking the cobalt uses a delphi ECm like the Aveo. Wouldn't I be able to get a MAP from a SS and hook it to the Aveo?

Post by **PrecisionBoost** » Mon Jul 17, 2006 3:18 am

Those MSD voltage boosters are great to increase the flow of stock components..... but just remember that it will severly shorten the life of your fuel pump.

Can't get something for nothing unless your an elected official

As for the MAP.... you would need to use an ECU setup for use with a 2bar map sensor as opposed to the 1bar sensor your Aveo ECU is setup for.

Should you decide to simply throw on the 2Bar map sensor your engine will be destroyed the first time you take it out because it will be putting out 30% less fuel than it's supposed to due to the difference in voltage output between the 2bar and 1bar MAP sensors.

Post by **PrecisionBoost** » Mon Jul 17, 2006 3:26 am

Having spouted out that warning...... I'm looking to do something similar with my Lemans turbo.... I am thinking about installing a 3bar MAP sensor so I can push the engine past 14psi of boost.

If I were to look at the voltage output from the 2bar and 3 bar I would expect the voltage of the 3bar MAP sensor to be roughly 30% lower than the 2 Bar sensor at the same level of boost.

My thought is that if I install 30% larger injectors it should make everything work out just right.

This is just a theory.... I have to do some research on what I'm proposing.

Nubira2.2 · Post by **Nubira2.2** » Mon Jul 17, 2006 4:56 am

what about 2bar sensor and a piggyback to adjust the signal

is that ok ?

Post by **PrecisionBoost** » Tue Jul 18, 2006 12:11 am

Yes..... many of the aftermarket systems will allow you to modify the signal to make the stock ECU happy.... many will allow to to "clamp" the voltage at programable voltage levels.

I've seen guys using simple "translators" which make the stock ECU see voltages similar to that of a 1Bar sensor even though they are running a 2 or 3 Bar sensor.
( I belive it's very common with the Mitsu Eclipse guys)

Nubira2.2 · Post by **Nubira2.2** » Tue Jul 18, 2006 12:20 am

a big concern i have is

how can i retard my timing when boosted ?