Official 1.8 turbo thread

[christopher.s.terry]

Well.... You will want a bar sensor. 2 bar is probably enough if you don't plan on boosting over 10psi. So the first question is, does the 1.8 already have a bar sensor in the intake manifold?

If not, the post IC charge pipe is an acceptable location.

The next question is, can the 1.8 ECU be tuned to read boost from a bar sensor?

I suppose MAF reading alone could be adequate, and you could run a mechanical boost gauge. But I imagine a tune that can use feedback from a bar sensor would be preferable.

I don't have any experience when it comes to adding boost to a N/A engine. But these are the questions that pop into my mind. I have a buddy that runs a push-through turbo set-up on a non-computer carb with great success, but fuel injection need feedback to determine how much fuel to apply.

I will also email Dave as well to see what he will recommend


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[mja]

Well.... You will want a bar sensor. 2 bar is probably enough if you don't plan on boosting over 10psi. So the first question is, does the 1.8 already have a bar sensor in the intake manifold?

If not, the post IC charge pipe is an acceptable location.

The next question is, can the 1.8 ECU be tuned to read boost from a bar sensor?

I suppose MAF reading alone could be adequate, and you could run a mechanical boost gauge. But I imagine a tune that can use feedback from a bar sensor would be preferable.

I don't have any experience when it comes to adding boost to a N/A engine. But these are the questions that pop into my mind. I have a buddy that runs a push-through turbo set-up on a non-computer carb with great success, but fuel injection need feedback to determine how much fuel to apply.

Have done the forced induction on N/A motors in a few cars. AFAIK pretty much any motors nowadays can drop down to a speed density tune or base tables in limp mode. It's easiest to bypass the MAF altogether with a speed density tune in this case. Don't know who he's tuning with but HPtuners used to charge more for 2 vs 3bar upgrades so should keep that in mind when upgrading the MAP sensor. You're right 2 bar should be sufficient.

Don't know if these have been addressed yet: my question with this setup is...are the fuel pumps the same in the 1.8 and 1.4? If so you should be good. hopefully Christopher you have plans on adding meth injection? In my experience when getting the most power from n/a with FI it provides a huge safety net when tuning. Of course colder plugs, etc. This project looks like some good times. :banana:

 

[christopher.s.terry]

I am adding methanol injection and ngk copper plugs i just needed to kno about the sensor setup:/ but thanks guys for all the help!!!


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[mja]

I am adding methanol injection and ngk copper plugs i just needed to kno about the sensor setup:/ but thanks guys for all the help!!!


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I just read over the thread a bit more, I'm liking this a lot. In the past I've just bought a sensor from the same brand/manufacturer. If you're having someone else tune it, get a 2 or 3 bar sensor (won't matter unless u want to save bucks on upgrading your own personal tuning software) that can hopefully plug into the same spot on the manifold (or wherever it is on our cars). Maybe check out a 1.4 sonic in person and see if the sensor will pop into your MAP sensor location, that'd be convenient if it did and u can just run a 3 bar. technical specs of the sensor you'll need for your tuner, can probably find them online or email the maker of the part for it (ACdelco, for example). They'll need kPA/volts/offset measurements of the sensor. Just have a chat with the tuner, he may already know a good sensor for it or have one calibrated in his software already.

opcorn:

 

[Sneakerfix]

I am adding methanol injection and ngk copper plugs i just needed to kno about the sensor setup:/ but thanks guys for all the help!!!


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Meth is really not needed it's just complicating things I've never ran meth in any of my Hondas and they made good power with out it, just tune and tune somemore meth is not the answer tuning is

The 1.8 pcm is limited with a lot of things. But when you get to the point of tuning start off with only the maf and work your way up to the 3bar map you don't want to over do the build or youll never get it finished.

 

[christopher.s.terry]

Good point


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[Sneakerfix]

I can't wait to see your build get going

 

[christopher.s.terry]

Lol it is going. But i kno tho


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[mja]

Meth is really not needed it's just complicating things I've never ran meth in any of my Hondas and they made good power with out it, just tune and tune somemore meth is not the answer tuning is

The 1.8 pcm is limited with a lot of things. But when you get to the point of tuning start off with only the maf and work your way up to the 3bar map you don't want to over do the build or youll never get it finished.

you're correct it's not needed. usually I don't throw my counter opinion in here. but meth imo is a must for longevity of a n/a motor that's FI if you're trying to make decent power. It doesn't complicate anything whatsoever. tune without meth for 93 and have a cheap 50/50 water/meth setup that comes on boost around 4 psi, they're ridiculously simple to hook up and no extra tuning is needed. can get a 5 gallon drum of meoh for 50-70$ that will last 6 months. can use smaller jets. there's too much added security. mixing a higher octane rating fuel and dispersing heat in the combustion chamber, the cleaning effect of methanol in the intake tract and turbine, lowering intake temps etc. It makes absolutely no sense to me to not buy a used 50-100$ pump/kit on ebay/CL. especially with thousands already into the project.

But I do understand the logic, some people have extremely valid cases against why they don't buy 120$/month health insurance either.

edit:
also, if they try tuning the MAF it's going to drop down to base tables anyway once in boost, if this is like any other n/a gm ecm. better to just start with and keep SD tune, KISS method. another point I forgot to add, is the IAT sensor in the MAF or similar location in our cars? if so, you may want to plumb for a new IAT in the intake before the manifold area. another benefit of meth, can spray in multiple locations, and one before the IAT to cool the charge. again talk to your tuner about the MAP and IAT I'm sure he'll give you the right info.

 

[christopher.s.terry]

Ok great info. Thanks


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[christopher.s.terry]

Did some more looking. Final decision. Im going to buy the ZZP intercooler with RAW charge pipe kit.


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[Scott1_2]

So I was talking to my teacher who knows about turning cars but their older cars but he said with a 10.5 to 1 cr he said start small like 4psi he went threw 3 dodge engines Turing up the psi without building the fuel system up just what he told me take it for what u want but just asking some one who had been down a simaler road

 

[christopher.s.terry]

Im gonna start out between 5-8psi. Im also working with DDMWORKS on the project.


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[Scott1_2]

Ok like I said just spreading the knowledge im doing my tune today u think after the kits all done trifecta will mass produce a tune u know so I don't have to buy another tune?

 

[Sneakerfix]

Ok like I said just spreading the knowledge im doing my tune today u think after the kits all done trifecta will mass produce a tune u know so I don't have to buy another tune?

Not all builds will and can use the same tune



My last build was at 10.5 on a GT35R

 

[Scott1_2]

I know I was asking bf if trifecta would make one for a turbo build u know so it would be less expensive then buying another tune threw some one else if that makes sense I don't mean to be difficult


Also what was you last build

 

[christopher.s.terry]

Ok like I said just spreading the knowledge im doing my tune today u think after the kits all done trifecta will mass produce a tune u know so I don't have to buy another tune?

I wont be using Trifecta. I believe Dave from Ddmworks will be using HPTUNERS for me


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[Scott1_2]

Ok awell I'll bite the bullet and spend the extra when I do turbo mine lol

 

[christopher.s.terry]

Lol nice


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[Sneakerfix]

I know I was asking bf if trifecta would make one for a turbo build u know so it would be less expensive then buying another tune threw some one else if that makes sense I don't mean to be difficult


Also what was you last build

Stock block Honda B16B built head sheepy built turbo set up.

I wont be using Trifecta. I believe Dave from Ddmworks will be using HPTUNERS for me


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Good choice but is he local to you? Remote tuning would suck without being on the DYNO and street tuning you would be a limits