3400 Swap

[Buttjupp]

Heres the lowdown.

I have swapped to a 3400 V6 from an 2000 Alero with the Multech injectors into my 90 Beretta GT.

I am currently running my stock ODB1 Chip from my 3.1 v6 and I don't think it likes the new Injectors.

Has anyone done this swap into with an automatic tranny with the Multech injectors? Also where could I get a reprogramed chip from?

Thanks
gor
90 GT 3400
88 Z24
03 Impala LS

[SappySE107]

Are you running the 3400 injectors? Just want to make sure. I have done a 3100 with 3100 injectors, and michael at FFP has done some work with the 3400. If you could get the car to indiana, I can have it tuned within 3 days, maybe less.

[Buttjupp]

Are you running the 3400 injectors? Just want to make sure. I have done a 3100 with 3100 injectors, and michael at FFP has done some work with the 3400. If you could get the car to indiana, I can have it tuned within 3 days, maybe less.

The Beretta just isn't running as solid as I would like it to take it on a 7 Hour drive to Indiana. I am running the 3400 Multech injectors right now. I may consider swapping out to the Old style if I can't find a solution with the newer injectors. I am running a FFP UD Pulley on the 3400 as well.

What if I shipped you my current chip?

[Cliff8928]

Are you running the 3400 injectors? Just want to make sure. I have done a 3100 with 3100 injectors, and michael at FFP has done some work with the 3400. If you could get the car to indiana, I can have it tuned within 3 days, maybe less.

It's got basically everything from the 2000 model year 3400... Including the Multec-2 Injectors..

The only differences between Mine and Gor's cars are...

1) My car is a 89 (Gor's is a 90)

2) My engine is a 99 (Gor's is a 00)

3) I have a 5-spd (Gor's is an auto)


also - mine runs fine on the original tuning for the 2.8

Cliff Scott <- helped install Gor's 3400
89 BerettaGT
89 Volvo740

[SappySE107]

You would shit yourself if it was tuned if you think that 2.8 chip is running it fine.

What is the stock code on your chip, I may have a copy of it already. I could try the changes michael made but I don't know how close it is. Has to be better than the stock chip though. I think he said idle was the only real problem when he was testing.

[Buttjupp]

You would shit yourself if it was tuned if you think that 2.8 chip is running it fine.

What is the stock code on your chip, I may have a copy of it already. I could try the changes michael made but I don't know how close it is. Has to be better than the stock chip though. I think he said idle was the only real problem when he was testing.

Yes but what about my situation? heheh

[Cliff8928]

You would shit yourself if it was tuned if you think that 2.8 chip is running it fine.

What is the stock code on your chip, I may have a copy of it already. I could try the changes michael made but I don't know how close it is. Has to be better than the stock chip though. I think he said idle was the only real problem when he was testing.

I said fine, not optimal... fine means it runs, doesn't stall, and drives like it did before, just with more power.. Of course you have my info from my chip, remember you made me that corrected one for my VSS?!?

Gor on the other hand isn't so fortunate... What kind of changes need to be made for those Multec 2 injectors (i imagine that's the big difference why his car doesn't run as well as mine?)

Cliff Scott
89 BerettaGT
89 Volvo740

[SappySE107]

It applies to both setups. If you have larger injectors, you have to change the injector constant. After that, the fuel tables have to be redone. You should talk to michael @ ffp about the 3400 using 3400 injectors since he has more experience with them than I do.

[JohnyG]

I got better times with the 3.1L injectors than with the 3400 Multec2's.
1/8 best was 9.86 @ 73MPH


Stock chip and injectors I ran a 14.9 and a lot of very low 15's. (9.67 1/8 mile at 75mph) different track though.

With the FPP chip tuned for 3.1L injectors, I ran another 14.9 and a 15 flat.

-John

[SappySE107]

You never ran with a chip tuned for the 3400 injectors though, nor a chip tuned to your car. There is a difference between that and a stock 3.1 chip or the 3.1 FFP chip since it is also just based on a normal 3.1 and not a 3400 with 3.1 injectors.

[JohnyG]

You never ran with a chip tuned for the 3400 injectors though, nor a chip tuned to your car. There is a difference between that and a stock 3.1 chip or the 3.1 FFP chip since it is also just based on a normal 3.1 and not a 3400 with 3.1 injectors.

Yes I did, a ffp chip tuned for the 3400 injectors, multec2's wouldnt even run with the stock chip.

-John

[SappySE107]

Hmm, you must be the one michael was working with then. The stock 3400 injectors shouldn't run worth a crap with the stock chip.

[JohnyG]

[SappySE107]

Yeah, I remember that. All I had to do was reinstall windows and it stopped doing that.

I think I sent you that last chip as well, which is just the usual 3.1 chip with nothing at all to do with the 3400. Last I heard it was just your idle that needed to be fixed with the 3400 injectors. I bet it is similar to the 3100 I just tuned, too much fuel down low and not enough up top. That is, using the stock injectors.

With the 3.1 injectors, you are probably running lean at high RPM, which is why your times aren't any better.

[JohnyG]

Hmm . . well I thought that beretta with the same setup as my car and multec2's ran like a 14.9?

He also had slicks and ffp underdrive pulley when he got that time iirc.


Im just sick and tired of messing around with the multec2's, the multec1's run smoother, it idles perfect, and I pull off better times also. (although they difference is maybe .2sec in the 1/4 at the most)

-John