just a 60 degree tidbit

[IanSzgatti]

changed a water pump today on a customers malibu... had to drive it to make sure it didnt overheat. I could really tell the difference between my 1997 and the 2000... don't know why i never thought the 3.1 was worthy... but it's pretty damn quick...
besides the upper and lower IM's, what else was changed on the 2000 3100's? dont tell me it's only the induction!!! 15 horsepower or something??? pulled like a train, and i can only imagine how some of your rides feel after the sh*t you do to them..

[IsaacHayes]

There are guys with 2nd gen cavaliers (3.1mpfi 5spd) that swap to 3400 with a reground cam, custom long tube headers, and other tidbits and run high 13's in the 1/4 mile!!!

3100 in 2000 got 3400 heads and intake manifolds. The heads have slightly bigger intake valves. That's basically it. They still have 52mm TB while 3400's have 56mm though. Of course the tuning is probably a bit different as well. Yours being a 97 has OBDII so you could get a DHP or have someone that has one re-flash your ECM to the fuel/spark map of a 2000 3100 after putting on 3400 heads and intakes and it should be exactly the same then. Well you'd want to run the same injectors and FPR as the 2000's do as they bumped the size of injectors and fuel pressure up.

[IanSzgatti]

hmmm

[Azrael]

I thought the newer 3100's had the 56mm TB's too. I know the old ones had 52mm ones for sure. The transmission's gearing might be a little more aggressive compared to the older malibu as well.

[IanSzgatti]

well i could get a complete 3100 99' engine right now for 500, but im thinking it's not like the 2000 year... as far as i know from here, 2k 3100 is when the changes were made...also the 2000 engine they have is 850.. big price difference there... guess i could look in the wiki thingy on here to answer that...

[IsaacHayes]

No that would be the same engine as you have right now. Unless it's a rare large port one I thought someone posted their 99 was a large port but it's uncommon and not an official year for the switch.

car-part.com well help you find engines. Go for a 3400 instead!

[IanSzgatti]

what does this mean exactly... I was looking through the wiki at the development over the years... and this, i was just wondering what kind of improvment it is


24-X encoded crankshaft (3400 Equinox only)

[IsaacHayes]

What year was that? The equinox 3400s had the weird 54x crank setup like the 3500's have. That one you said is 24x.. so it might have that on the crank instead of on the dampener like your's and mine have.

See we have 7x on the crank for spark, and a 24x one on the crank dampener that is only used at idle and low rpm for smoothness.

[bszopi]

The 24-X encoded crankshaft helps the engine’s powertrain control module (PCM) deliver accurate spark timing and fuel delivery. The accurate sensor enables the PCM to know the exact position of the crankshaft within just a few degrees of crank rotation. This helps the PCM adjust and deliver the optimum fuel and spark curves for the engine's immediate requirements. This Quick Sync ignition system is identical to that on the 3500 V-6.

http://media.gm.com/division/2005_pr...2005%20LNJ.doc

[IanSzgatti]

http://media.gm.com/division/2005_pr...2005%20LNJ.doc

ahhh... thank-you