3400 ???

[ultradriver1000]

I have a 96' ga 3.1 and i know the 3.4 will bolt in but has anyone done this ?? I helped my buddy swap one into a 92 cavy which wasn't to bad but being a 96 grand am i want the computer to be fine. I want to know everything i'd need to change....such as injectors or ecu reprogramed.... i'd also like to know if there is a shift kit or better stall for our autos....what i'd really like to do is put in a 3.4 with some work done to it and a 6 speed out of the new G6 gtp but i'll have to wait untill that tranny becomes more populated in the junk yard... thanks for your help

[Matt95GT]

It's been done.

www.3400swap.com

['96GAGT]

Ive wondered this my self. How much more power would I get, how much more torque would I get.. ect.

[TorquePower]

depends on the 3400 you get. From what I know GA 3400's have 170 horsepower and 205 ft-lbs of torque and the mini-van/SUV 3400's have 185 horsepower and 210 ft-lbs of torque, that's what i want in my car.

[Bart001]

Yeah the 3400 is very possible.... you could even say easy... that is until your half way through and start cursing my name...lol...

I am building my 3400, still waiting to see my cash sitation this summer, and gonna get custom cam, pistons, rockers, etc.. the list goes on... as long as the cash rolls in...lol..
What else I wanna do, but i'm not sure about is swap my 3100 for a 2003 3400 in my 95 grand am gt, AND just buy the 2003 computer and wiring harnest and swap that too.....

and the 3400 power wise.... stock yeah 175-185. but with a lil research and money, you can get this puppy to about 280hp
oh yeah thats a lil research and a lot of money...lol.. and LOTS of time... I've been taking the 3400 apart and cleaning, inspecting, measureing, etc... wow.... TIME TIME TIME....

[ultradriver1000]

oh i know its been done i did one in my friends 93 cavy i was just woundering if anyone has done one in a 96-99 modle ? I know how to put one into a pre 96 just woundering how much different it would be. Thanks though ....
http://www.v6z24.com/registry/calendar/2006/p2-04-mrpaulo.jpg

[Korbendallas68]

lol, Do you guys even look at the site??

www.3400swap.com

[dandragonrage]

I looked at that site and it doesn't give too much of an indication of the amount of performance increase.

But it sure has me interested in doing it. I have the 3100 and while it runs fine and only has 92K miles, I find myself wanting more power, and when I used to have a Camaro, I always found myself wanting to build it up a bit. (I sold the Camaro before getting a chance because I couldn't afford having 2 cars, which would be necessary due to snow here.)

[Azrael]

Generally the 3400 has about 20-30HP and 25-30lbs-ft of torque over the older 3100's. The majority of the power increase is varied depending on the year of the 3400 and which exhaust manifolds you end up using. The newer 3400's are slightly better and I stress slightly. Maybe a few HP difference between each other.

If you use your old 3100 exhaust manifolds to make the swap easier then 170 BHP might be the most you'd see. Exhaust manifolds from 3400 equipped minivans have the best flow of what's available and with a little custom work can be made to fit and then you might see 185 BHP although I believe 180 is more likely pending the mileage of the 3400 swapped in and how well it was maintained.

From there power output will be varied depending on what mods your car already has or will get during the swap.

[dandragonrage]

I think I'd probably do headers at the same time as the swap, should I go for it

[slowbird]

There's more potential in the 3400.

Some of those 3100 have small ports in the Heads/intakes.

Is you car OBDII?

[TorquePower]

I'm sad, I found a 3400 LA1 from an 02 silhouette with only 20k miles. $1,150 including shipping and it's coming from florida to me in Ohio. It's been thoroughly cleaned and is "ready to ship". =|

[slowbird]

wHY SAD?

[TorquePower]

Because I have a 1st generation 3100? on my GA and it's horrible...and the 3400 from the SUV/Minivans have 185 horsepower and 210(or 215) ft-lbs of torque where the GA's and Alero's etc. have 170 horsepower and 205 ft-lbs of torque

[99blackSE]

Originally posted by TorquePower
Because I have a 1st generation 3100? on my GA and it's horrible...and the 3400 from the SUV/Minivans have 185 horsepower and 210(or 215) ft-lbs of torque where the GA's and Alero's etc. have 170 horsepower and 205 ft-lbs of torque

Uh... you realize that those 3400s are the exact same motors (minus a few technical changes between the years)? Its not the engines that are making the difference, its the PCM and exhaust layout, correct me if I am wrong.

[slowbird]

I think you are correct.

[TorquePower]

Originally posted by 99blackSE
Uh... you realize that those 3400s are the exact same motors (minus a few technical changes between the years)? Its not the engines that are making the difference, its the PCM and exhaust layout, correct me if I am wrong.

I will correct you with the information I've seen. and a few obvious points.

point 1) SUV/minivans are bigger, and have more wind resistance and usually carry more cargo, thus the increase in torque and horsepower over the regular 3400's.

point 2) don't need one.

I've found a few websites, and the gmparts-direct.com customer service has backed me up too when I was speaking to one, that the 3400's out of the SUV/minivans from GM have 185 horsepower and 210 ft-lbs of torque.

[ultradriver1000]

Im actaully positive the only difference is the exhaust and computer. The exhaust manifolds are slightly larger on the vans and a tweeked comp give the hp differences.... My car is odbII thats the difference i was woundering about.... i did one in my friends 93 cavy and we changed the injectors to the same ones that where in the 3.1 but i was woundering if i could leave them since my car is odbII..........make sure to install a underdrive crank pullie on the 3.4 u will be much happier

[slowbird]

Yea...there are no major Mechanical Differences between the SUV/Minivan 3400's and the N body ones.

[99blackSE]

Originally posted by TorquePower
I will correct you with the information I've seen. and a few obvious points.

point 1) SUV/minivans are bigger, and have more wind resistance and usually carry more cargo, thus the increase in torque and horsepower over the regular 3400's.

point 2) don't need one.

I've found a few websites, and the gmparts-direct.com customer service has backed me up too when I was speaking to one, that the 3400's out of the SUV/minivans from GM have 185 horsepower and 210 ft-lbs of torque.

Yeah I know what the power ratings are ... dont worry about that, thats one of my stronger points as far as GM lore goes...and I wasnt trying to disagree about the ratings, you got em right.

and Im sure its not all because of aerodynamics that they have this mysterious increase in power... think about being competitive motorwise to other vans... Tell you what... go take any two LA1s from a Venture, Montana, Grand Am, Alero, Malibu, Impala, Monte Carlo, Aztek, or Equinox, and put them on an engine dyno, and see the major difference....I'm pretty sure it will be negligable.

And swapping in an LA1 van motor probably isnt going to net you an extra 15 hp over a LA1 in a GA SE or Alero... same with taking one from an LA1 Impala, which has a less restrictive W-body factory exhaust (maybe that explains the 180 hp they have?)

The exhaust design that the N-body platform creates will probably take away that 15 hp, maybe the PCM will give you a few extra ponies, maybe... I wouldnt think the cam profile would be much different either.

I dont know, that is my stance on it. No offense, but I am waiting to be proven wrong dude

:)

[Azrael]

While it's true that the larger, heavier minivans need the extra power to give the soccermoms an edge, GM gave it to them in the form of better flowing exhaust manifolds and nothing more.

GM is stingy and having two versions of the same engine would have been costly. Although they've thrown caution to the wind with the 2 or 3 versions of the new 3500...

[ultradriver1000]

ur right

[matts]

yep you're right. motors are very close to the same.....the intakes MIGHT be a little different, but they're not going to be by much. same way with the exhaust manifold. i would say 95% of the gains would come from the computer being used.