questions on my ls

[JDMda808]

im very new to turbos never touched one before and just had a couple questions about boosting my car. and i hope i dont get too much smart ass answers about them haha

so i just bought a turbo kit for my car and im missing a couple things the intercooler and a bov and injectors and i come get those parts pretty easy. and if it helps i have stock internals and planning to boost 6psi.

my first question is why cant i boost my car on obd0 why do i have to convert it to obd1, and is a chip needed or is that done with the tune.

my second question is why a professional tune? cant you have it dont with a boost contoller or turbo timer or is a/f ratio neeed to be changed.

thanks in advance to any one who can help me out

 

[Jvest]

im very new to turbos never touched one before and just had a couple questions about boosting my car. and i hope i dont get too much smart ass answers about them haha

so i just bought a turbo kit for my car and im missing a couple things the intercooler and a bov and injectors and i come get those parts pretty easy. and if it helps i have stock internals and planning to boost 6psi.

my first question is why cant i boost my car on obd0 why do i have to convert it to obd1, and is a chip needed or is that done with the tune.

my second question is why a professional tune? cant you have it dont with a boost contoller or turbo timer or is a/f ratio neeed to be changed.

thanks in advance to any one who can help me out

ok, not to be an ass but if your asking these questions you probably shouldnt be trying to boost your car..
however to answer your questions,

you could boost in on obd0 but obd1 is much easier to tune and has a lot more options to get it tuned.

a boost controller only controls boost.
a turbo timer keeps the car running for a few minutes after u pull the key to let your turbo cool down.
when turboing a car the fuel and ignition need to be changed to get correct afr's and keep from detonation

DO NOT DRIVE THE CAR WITHOUT A TUNE
good luck

 

[Samurai_Blue]

im very new to turbos never touched one before and just had a couple questions about boosting my car. and i hope i dont get too much smart ass answers about them haha

so i just bought a turbo kit for my car and im missing a couple things the intercooler and a bov and injectors and i come get those parts pretty easy. and if it helps i have stock internals and planning to boost 6psi.

my first question is why cant i boost my car on obd0 why do i have to convert it to obd1, and is a chip needed or is that done with the tune.

my second question is why a professional tune? cant you have it dont with a boost contoller or turbo timer or is a/f ratio neeed to be changed.

thanks in advance to any one who can help me out

Not to be a smart ass but you need to do research

you need to convert to OBD1 for many reasons but mainly because you need to run a management system (chrome hondata neptune greddy apexi AEM etc) The "chip comes with a tune" the chip is what holds all the information after a dyno tune ie fuel maps etc.

You can destroy your motor if you have no idea how to tune a car. You need to set your AF ratios etc at WOT, half WOT and crusing typically. A turbo timer is something your alarm has which is like remote start, after you mentioned that for tuning i belive you need to do alot more research.

 

[JDMJon]

ok, not to be an ass but if your asking these questions you probably shouldnt be trying to turbo your car.

I happen to agree, although since you already have a lot of parts you mine as well stick with it. You have to start somewhere, and theirs no better way to learn than hands on experience.

As for the tune, there are a few different options. Hondata s300, is by far the best tuning software for B Series. If money is tight I would recommend using a chipped p28 ecu. Its a stock ECU that can be chipped and tuned for your specific build. If you decide to get s300 you can run any size injector as long as you get a dyno-tune. Dyno Tuning is your best friend, you will be able to see the numbers you put down and know that your car will run reliably. As for injectors I would recommend Injector Dynamics 1000cc, which is one of the best injectors on the market. Your tuner will know how to tune them perfect, since they are so commonly used. With a Turbo car you either can do it right the first time, or half ass it and keep doing it over and over. Anyway good luck, I hope my .02 cents helped.

 

[Samurai_Blue]

ok, not to be an ass but if your asking these questions you probably shouldnt be trying to turbo your car.

I happen to agree, although since you already have a lot of parts you mine as well stick with it. You have to start somewhere, and theirs no better way to learn than hands on experience.

As for the tune, there are a few different options. Hondata s300, is by far the best tuning software for B Series. If money is tight I would recommend using a chipped p28 ecu. Its a stock ECU that can be chipped and tuned for your specific build. If you decide to get s300 you can run any size injector as long as you get a dyno-tune. Dyno Tuning is your best friend, you will be able to see the numbers you put down and know that your car will run reliably. As for injectors I would recommend Injector Dynamics 1000cc, which is one of the best injectors on the market. Your tuner will know how to tune them perfect, since they are so commonly used. With a Turbo car you either can do it right the first time, or half ass it and keep doing it over and over. Anyway good luck, I hope my .02 cents helped.

He has an LS why does he need a P28? He could run a ls ecu. As for the injectors on STOCK internals on 6psi on what i assume is a T3/T4 why does he need 1000cc injectors? Why not 500cc injectors since he will probably make a little over 200whp.

 

[ALL M0T0R]

As long as the ls ecu is chippable. A P75 from pre 96 will be chippable, others after will not.

Why limit the boost.. The only weak part of the LS motor itself is rod bolts. Upgrade the rod bolts while doing the turbo setup and save yourself some long run trouble. Stock ls motors without rod bolt upgrade will handle 10-12 psi easily on a nice turbo. Typical limit on the stock ls's is usually 350-400whp. Run ID injectors, better spray pattern = better atomization and better power.

Stock injectors will be fine up until around 250, you'll need a adjustable FPR to achieve this however.

 

[Samurai_Blue]

As long as the ls ecu is chippable. A P75 from pre 96 will be chippable, others after will not.

Why limit the boost.. The only weak part of the LS motor itself is rod bolts. Upgrade the rod bolts while doing the turbo setup and save yourself some long run trouble. Stock ls motors without rod bolt upgrade will handle 10-12 psi easily on a nice turbo. Typical limit on the stock ls's is usually 350-400whp. Run ID injectors, better spray pattern = better atomization and better power.

Stock injectors will be fine up until around 250, you'll need a adjustable FPR to achieve this however.

Agreed, but you also want to keep away from 80% duty cycle on the injectors, as this goes into gross fuel dump which the injectors just spray for no reason. Also i want to reiterate the point about stock motors and boost, DO A COMPRESSION TEST FIRST. if it has good numbers boost away. + rep for reminding me about that

 

[Spawne32]

Agreed, but you also want to keep away from 80% duty cycle on the injectors, as this goes into gross fuel dump which the injectors just spray for no reason. Also i want to reiterate the point about stock motors and boost, DO A COMPRESSION TEST FIRST. if it has good numbers boost away. + rep for reminding me about that

just want to clarify on that duty cycle subject

http://www.hondata.com/techduty.html

Honda and duty cycle

Honda usually runs their injectors to 100% duty cycle at redline. They appear to adjust the fuel pressure to achieve this. A good example is the early B16A and B18C engines. Both have 240cc injectors, but the B16A has 38 lbs fuel pressure and the B18C has 45 lbs fuel pressure. The difference in fuel pressure is roughly the difference between engine capacities (remember that fuel delivery from extra fuel pressure is not linear). If the B16A has a touch more fueling it is because it has a higher specific output. I believe that Honda runs their injectors to 100% to get accurate delivery at part load and revs, which in theory will help emissions, economy and drivability. The implication of Honda running their injectors to 100% duty cycle is that there is not much scope to increase the engine output on the stock injectors, since the only other way of increasing fuel delivery is to increase the fuel pressure. With forced induction you fairly soon get into crazy fuel pressures unless you increase the injector size.

We have not seen any problems with engines running rich or lean once the stock injectors get past 80-85%, but it is not recommended to exceed 80% duty cycle with replacement injectors. Otherwise you will run the risk of the injector not being able to open and close quickly enough, which causes the injector to float half open. This will lean the mixture out, which is not going to healthy for an engine at high revs and under full load.

In terms of power change from different sized injectors it appears that there is little difference with the Honda engine changing the injector size if the overall fuel delivery is kept the same by reducing the injector duration. We have dyno tested different sized injectors and did not find any difference in engine output between 240cc and 440cc injectors on a B16A engine (we adjusted the injector duration to give the same lambda readings).

 

[Prozon]

ok, not to be an ass but if your asking these questions you probably shouldnt be trying to boost your car..

Really? How are you supposed to learn if you don't ask questions? I agree he should research- but it seems like he's got the jist of it down to be asking more specific questions. Want to know how much I knew before I turbo'ed my car? Nothing whatsoever. I had never touched a turbo in my life before my Integra. I spent about a year researching with the turbo sitting in my room until I installed it- but I knew nothing before deciding to boost.

so i just bought a turbo kit for my car and im missing a couple things the intercooler and a bov and injectors and i come get those parts pretty easy. and if it helps i have stock internals and planning to boost 6psi.

my first question is why cant i boost my car on obd0 why do i have to convert it to obd1, and is a chip needed or is that done with the tune.

my second question is why a professional tune? cant you have it dont with a boost contoller or turbo timer or is a/f ratio neeed to be changed.

thanks in advance to any one who can help me out

Buy an intercooler off of eBay. A small front mount. The BOV you could go wherever. Typically people buy certain brands because of the sound. I would go with RC injectors, how much power you are planning to will decide the injectors you should buy.

As for the tune, there are a few different options. Hondata s300, is by far the best tuning software for B Series. If money is tight I would recommend using a chipped p28 ecu. Its a stock ECU that can be chipped and tuned for your specific build. If you decide to get s300 you can run any size injector as long as you get a dyno-tune. Dyno Tuning is your best friend, you will be able to see the numbers you put down and know that your car will run reliably. As for injectors I would recommend Injector Dynamics 1000cc, which is one of the best injectors on the market. Your tuner will know how to tune them perfect, since they are so commonly used.

I think Hondata S300 is way overkill on a car that probably won't be making over 250hp, and in which you don't need any of the features that comes with it. Sure it's great if your Mr money bags and want bragging rights, but it's useless to anyone who won't use it's features.

1000cc injectors? That again is WAY overkill. Those injectors would be great if he was making 400-600 horsepower.. again, not over 250? I'd say go with RC 440 injectors. If the tuner is competent it shouldn't matter what size or brand the injector is.

As long as the ls ecu is chippable. A P75 from pre 96 will be chippable, others after will not.

^^ This. I'm running the stock ECU in my '93. Chipped and tuned on Crome.

Why limit the boost.. The only weak part of the LS motor itself is rod bolts. Upgrade the rod bolts while doing the turbo setup and save yourself some long run trouble. Stock ls motors without rod bolt upgrade will handle 10-12 psi easily on a nice turbo. Typical limit on the stock ls's is usually 350-400whp. Run ID injectors, better spray pattern = better atomization and better power.

I would say the RODS themselves are weak. And as my tuner told me. "300hp has been done all day, but it's a little riskier."

Stock injectors will be fine up until around 250, you'll need a adjustable FPR to achieve this however.

Eh, personally I would upgrade. (And that's why i'm running 440's lol.)

I actually don't know the limits of the stock fuel pump- but I would upgrade to a Walbro 255lph pump. I have heard the stock pump can supply up to 250hp, but it's just more stress on it. Anything over 200hp should be upgraded to a 255.


Hope it all helps. If you have any more questions let me know.
And if you need any more turbo parts e-mail Mitch@QSrace.com or PM Thenoxus1 here.

 

[AlexD]

Obd1>obd0 for tuning software.