turbo

[petrified.rabbit]

It's gearing as well. An nearly idling v8 can keep the car moving 65 mph in 5th or 6th gear with most likely use less gas relatively than a 4 cylinder running at 3000-3500 rpm to do the same.

If the bore and stroke is the same (it never is) then a v8 would consumer the same amount of gas as a 4 cylinder running at twice the rpm. So a 2.5 liter 4 cylinder driven at 3500 rpm would consume the same gas as a 5.0 v8 running at 1750 rpm

Having driven lots of v8 cars. If you can keep at the speed to run at 1750 rpm in 5th gear you could get good mpg

[Z34guy]

It's gearing as well. An nearly idling v8 can keep the car moving 65 mph in 5th or 6th gear with most likely use less gas relatively than a 4 cylinder running at 3000-3500 rpm to do the same.

If the bore and stroke is the same (it never is) then a v8 would consumer the same amount of gas as a 4 cylinder running at twice the rpm. So a 2.5 liter 4 cylinder driven at 3500 rpm would consume the same gas as a 5.0 v8 running at 1750 rpm

Having driven lots of v8 cars. If you can keep at the speed to run at 1750 rpm in 5th gear you could get good mpg

Exactly. in fact, After the Oldsmobile, Ari was a little disappointed by the Aveo's gas mileage in that it was the same as her V6 with twice the displacement.

[2l 16valve]

well i dont thing anyone in SA has put a turbo on a aveo yet but i was considering doing this and its not a big job at all. the only thing i need to find out about is the fueling as i dont want to mess with that at all. there have been reports over here that the some opel comuter boxes can be accessed from a GM dealer and the fueling in creased to accommodate an engine channge or a turbo mod.

does any one have the name/ code for the aveo 1.5 ecu? thanks

[Nemasys]

I will tell you right now, getting the fuel to work with these cars with a turbo is a huge pain in the ass.

I'm controlling fuel with a Megasquirt, but the unit only detects 1/2 of the actual rpm because the ignition system on these cars is weird. There are ways around it im sure, some guys on daewootech might have better knowledge with megasquirts and this ignition system.

It does work, extremely well i might add, you just have to keep in mind that you need to input your fuel values for 1/2 the actual rpm of the engine (say you want X amount of fuel at 4000 rpm, then you set that X amount at 2000 rpm in the megasquirt, basically cut your ve fuel table rpms in 1/2 everywhere)

Another option is what exist3nce has done with his turbo Optra, 100% stock ecu and injectors and you add extra injectors in your charge piping controled by an aftermarket unit, so they only work when under boost, the rest of the time its like the car is bone stock which is way better since the stock ecu controls startup and warmup enrichments, you never have to worry if the car will start well or not and you also get your normal stock fuel economy under normal driving out of boost.

Which ever system you choose, you will have trouble getting a good tach signal, im not sure what exist3nce has done to get a good signal but his kit was also professionally built, assembled and dyno tuned, compared to my backyard garage setup and street tuning (it's also the 1st time every i play with turbos and fuel injection controllers) Im getting better at it, mistakes are costly tho.. but thats part of the game!

[petrified.rabbit]

nemasys: where are you picking up your tach signal? you might want to add magnets to you crank wheel and put a sensor to them for actual rpm input.

i've always only used megasquirt as a full replacement, not a piggyback. Would put it in the aveo with a turbo in a heart beat if it was emissions able.. i love the fact people do map sharing etc to help get you started.

really been looking for an lnf, but i've been leaning more towards an awp/o2m swap lately, something in my knowledge base and the whole swap could be had for as little as 2 grand. stock its 180 hp and 6 speed.. i have friends putting over 300 hp with daily reliability.. 5-600 hp without.

[Nemasys]

I've tried numerous places to get a signal without success, im picking it up from the 3 wire plug that goes into the coilpack assembly. It's the same place im picking up my aftermarket tach signal from.

It works perfectly this way, its just a pain to remember to set settings in megatune for 1/2 of what they actually are.

[petrified.rabbit]

so you are only picking up the fire of one of the two coil packs. hence 1/2 rpm. Just like an injector wire should read 1/4 rpm.

ok. i was really just curious where you were picking it up, other than adding a pick up on the pulley i think you picked the best place, unless you can pick it up at the tach signal off the computer. (may or may not be high enough voltage for a reading)

[Nemasys]

I tired it at the computer, inside the car off the factory tach also, and a few other places..

It's not that big of a deal really, my focus now is getting that mls headgasket in with a set of arp studs and some injectors im buying off someone.

Have to wait for spring unfortunately, its starting to freeze over here overnight at times, snow is coming and im anxious for it, i love snowboarding i cant wait to ride the hills! Keeps me busy during winter months and it goes away twice as fast lol

[petrified.rabbit]

you should get a head spacer so you can turn up the boost.. but then you'll need a second gasket.

[Nemasys]

I asked Garrett on daewootech before buying my gasket if it was worth it to get a thicker one, he said the compression doesnt change enough to make a difference and its just a waste of money for what i wanted to achieve.

I will be able to run 8-10 psi with this quite easily which should give plenty of power to spare, i dont want to blow transmission every 2 months lol