Gettin Turbo lined out

[Trampisjr]

Hey guys,
First I want to say I love this foram and the people here are very nice and helpful.

I've been looking around and pertty much answered my questions from searching, but I wanted to ask these questions not only to understand better but also to help the guy putting my turbo on my 420a.

The people putting my turbo on said that it can't be tuned on the dyno cause it couldnt be tuned, it needed a cpu chip or something so they could tune it.
Is that right???

Also, do I need an FMU for my car, I got one but I think they said I didnt need it, or that may of been the MAP Sensor.

The BOV sounds like a turkey. Im pertty sure its not supose to sound that way, at least a guy I talked to that has one like mine dosnt sound that way.

As you can see I dont know alot about turbo, but Im learning.
Any help is great.
Thanks so much, and Im sorry this is so long.

My car is a 1999, GS model, 420a engine

 

[dsmmike50t]

The people putting my turbo on said that it can't be tuned on the dyno cause it couldnt be tuned, it needed a cpu chip or something so they could tune it.
Is that right???

Also, do I need an FMU for my car, I got one but I think they said I didnt need it, or that may of been the MAP Sensor.

Someone correct me If I'm wrong but I went to a local shop for some tuning about 2 years ago and they were telling that they can flash my car in order to tune it. I wanted some dsmlink tuning so I moved onto another shop, so I'm guessing it can be done without a chip but I'm not sure.

You need an fmu it raises the fuel pressue according to the kind of boost you are running. As far as a map sensor goes I believe you only need it when your maf dies its so you can get home.

Is the bov vacuum line going to the intake manifold?

 

[Locke]

Someone correct me If I'm wrong

Ok.

The 420a ECU cannot be flashed or reprogrammed.

He will need the FMU to provide the additional fuel needed during boost - if this is the route he chooses to take.

There is no MAF on a 420a vehicle, and if the MAF goes bad on your 4g63 powered vehicle, a MAP sensor would do you little good for getting home.

He clearly stated he had a 420a engine. Be careful about the statements you make on this board.

The people putting my turbo on said that it can't be tuned on the dyno cause it couldnt be tuned, it needed a cpu chip or something so they could tune it.
Is that right???

Sort of correct. The factory ECU cannot be tuned in any way. The FMU (or S-FMU) will provide a means to mechanically increase fuel for boost. The FMU is preset to 12:1 or 10:1, so there is little you can do. The S-FMU can be tweaked a bit to provide a better mechanical "tune".

If you want more tuning, read up on MegaSquirt.

Also, do I need an FMU for my car, I got one but I think they said I didnt need it, or that may of been the MAP Sensor.

The FMU is the most simple and cost effective way of providing additional fuel to appropriate for about 8psi. If you are not going to use a more costly means of tuning, then you will need this. You will always need a MAP sensor with your vehicle.

The BOV sounds like a turkey. Im pertty sure its not supose to sound that way, at least a guy I talked to that has one like mine dosnt sound that way.

How do you know without having your turbo installed yet?

The guy installing your turbo seems to know nothing about boosting a 420a. As a matter of fact, he doesn't seem to know much about engines in general. Let me guess; this guy is giving you a deal, right? I would seriously recommend you get the car away from him, before he blows your engine up.

 

[Trampisjr]

Thanks for the repl.

No, I wish I was getting a good deal, but the guy is charging me 3,200. I have to take a loan out of the bank to pay it.

But in his defence, a guy that I had put it on before him screwed it up a little bit from what Im told.

I will be telling him what you told me and maybe asking this foram more questions, if that is ok?

I really wanted the turbo for a long time, and now, after everything Ive been thur with it. I wish I hadn't of brought it. Sorry if that offends anyone, I've just had a really bad experience with the whole thing.

 

[NATAS]

I recommend you tell the worthless #### working on your car to give it back and pay him what you owe him for labor and get the hell out of there as fast as you can. Then sell all of your turbo parts for your 420a and after that sell your n/t car. After you've sold your car and your turbo parts buy yourself a turbo DSM. It's way easier and cheaper to do it that way and you can make 5x the power for 1/5 the cost.

I'm not saying that a 420a can't be turbo, but it takes someone who really knows what they're doing and no matter what you can only run a few psi on a stock block. To make any resemblance of real power on a 420a you'll have to put more money into it than it would cost to just go out and get yourself a turbo model. DO IT!

 

[Trampisjr]

I just got off the phone with him and he said I'm getting 8ps at the turbo, but the car is only putting out 5psi.
He checked everywhere and there dont seam to be any leaks. Any idea why the turbo is putting out 8psi but im only getting 5psi, guys?
I know im lossing it somewhere, but he checked everywhere.

 

[Skip01]

I'll most definatley have to agree with NATAS.. just get out while your .. behind.. conversions are too many headaches when you could just wait and find an already turbo modell....

 

[silvreclips]

For that much money you could have just bought a bolt on kit. It doesn't really sound like your mechanic knows what they hell he is talking about.

 

[Locke]

Expect a pressure drop between the compressor and the intake. 3psi does seem a bit much, though. Have you constructed a boost leak tester, yet?

conversions are too many headaches when you could just wait and find an already turbo modell....

Or you could learn the operating principles of turbo systems and 4 stroke engines, then turbo the NT. There isn't any special knowledge or voodoo involved.