if i run 6psi....

[3100rettaracer]

95 3100 sfi v6. i am using the tgp injectors as well as a spare in the intake in case she desides to lean out on me under pressure. i'll be running psi, intercooled. is she gonna blow???? if not how much can i run???

[brian89gp]

Probably, IF you got both spark and fuel set right.

"tgp injectors as well as a spare in the intake", well. What have you done to use TGP injectors, what is controlling the spare, and what are you doing for spark.

[3100rettaracer]

nothin 4 spark and the tgp injectors are the 22lb injecors n i got the spare set up on a switch

[RacerX11]

Where in the intake is the extra injector? With a single-point fuel enrichment like that, you are more than likely to run lean on one or more cylinders. These intakes are designed for dry flow, and aren't going to do real well at disributing an air/fuel mixture.

Marty

[Guest]

thats the SFI from the grand am also right>?if it is where do you get a turbo?

[3100rettaracer]

huh i got the turbo from a friend

[Guest]

oh but ur engine is the same one they put in the Grand Am's from 95 isn't it?

[Guest]

Where in the intake is the extra injector? With a single-point fuel enrichment like that, you are more than likely to run lean on one or more cylinders. These intakes are designed for dry flow, and aren't going to do real well at disributing an air/fuel mixture.

Marty

That's the same conclusion I came to, I've been toying with the idea of either adding 6 more smaller injectors in each runner, just above where the UIM mates to the LIM, or using 6 N.O.S. Fogger nozzles in the same location. Fogger nozzles would be easier, but injectors would provide a better spray pattern I think.

[SappySE107]

with SFI, you can run a larger injector and not lose idle quality. Wouldn't that make a lot more sense in this situation? Without actually tuning the computer though (its map isnt it), you may as well forget about it.

[brian89gp]

If your ECM is MAP like I think it is, your looking into some major problems. At 6psi you need a lot less spark then your ECM will be giving. Fuel, that is bout the worst way to do it.

My suggestion, take the time and at least do the ECM side the right way.

[RedZMonte]

I know what your getting at but your questions don't really make a lot of sense. my recomendation is take it to a performance shop that has done custom turbo installs before and talk to them about the proper way to do it.... but here are some answers to your questions anyways...

you should not need the 7th injector. and you should not run lean. if your only running 6psi you will want to put in a Walbro 255 high pressure and a vortec 12:1 fmu. with only 6psi you don't really need to intercool it either. it would be a good idea but not required. any more then 5-6psi then you will want an intercooler to help prevent detination.


assuming everything is installed properly and there is nothing majorly wrong with the motor allready then it should not blow.

RedZ

[RedZMonte]

My suggestion, take the time and at least do the ECM side the right way.

and how would that be done?

RedZ

[614streets]

My suggestion, take the time and at least do the ECM side the right way.

and how would that be done?

RedZ

Have your ecu replaced with an aftermarket stand alone ecu and swap over to wideband o2 sensor set up. That will allow you to trim the timing advance and add injector pulsewidth/ fuel.

[brian89gp]

An aftermarket ECM like 614streets said is probably the easiest, though the most expensive. There are various was of making a stock ECM work, but they are by no way easy or fast.

Brian