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Old 05-25-2016, 02:02 AM   #1
aroundincircles
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What's the difference between...

the 3400 in the alero and the 3400 in say a Rendezvous? I know there is a 15HP and a 10ft/lbs difference between the two. I know the grand am GT has a 5/5 increase due to a different intake, is that correct? is that all the difference is, is exhaust and intake? or is there more? Sorry for the question I did a search and didn't find it, so if this has been discussed before, I will take a link to the discussion.
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Old 05-25-2016, 06:53 AM   #2
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Programming.

The GAGT has a ram air system, but it's not all that great.
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Old 05-25-2016, 10:34 AM   #3
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forgive my ignorance, but is there an easy way to program the system? I'm not looking for a rocket, but the engine just seems a bit sluggish sometimes. I have new spark plugs and wires coming in, to see if they make a difference. I don't know how old the ones that are on there are, and If I'm taking them out to check, I might as well replace.
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Old 05-25-2016, 02:13 PM   #4
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5hp isn't going to make a noticeable difference. The Transmission has different shift points as well. It's an engine platform that was introduced in 1980. It's basic technology is from the 70's. It's an engine with limited power without going to some pretty large expenses to get more out of it.

Good luck!
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Old 05-25-2016, 03:25 PM   #5
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I was looking at the 15hp/10ft/lbs increase, I know that's not a ton, but Maybe make it more peppy? when I'm on the freeway, not a lot happens unless I really put my foot down and make it down shift, but that doesn't seem to make it too happy. We'll see when the plugs and wires get in.
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Old 06-20-2016, 01:53 AM   #6
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A custom ECU tune should get you the gain you want, even easier if you stick to a strict 91 Octane tune (power can still be made on 87 Octane). Even just tightening up the shifts and pressures in the transmission can make a nice change. That's all I've gotten the chance to change with HP Tuners on my 99' and it was noticeable how much more aggressive the transmission was (still kept all the stock torque management though). The car is still getting ready for the road, so my test drives were limited to the small dirt road next to my house. So I didn't make any fuel/spark changes. Currently going over the rear brakes and have to fix the power steering and I'll start logging my changes with HP Tuners for the benefit of the Board.

The best option would be an in-person tune done on a dyno, then just an in-person tune, finally our last option would be a mail order custom tune, which is still better than a handheld programmer like a Superchips (not that they make those for our Alero's).


But it sounds like something isn't quite right with your engine, I'd see if there are any diagnostic trouble codes (DTC's) stored in the ECU by using a scan tool, then try running some fuel system cleaner through your fuel tank. I like to run slightly higher concentrations than they recommend if the engine feels sluggish. Something like Seafoam or Marvel Mystery Oil have had the most noticeable effect for me, from most generic fuel system cleaners. MMO also lubricates, so it helps quiet the in tank fuel pumps as well and lubricate the top end.

If that doesn't help at all and your engine is working as it should and it's just the stock power you are disappointed in, then a tune will wake it up like you want.
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Old 07-04-2016, 01:11 AM   #7
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If you want 15hp maybe cold air intake and exhaust can get you on your way. Also, a shift improver kit may help the car feel quicker. As Koots said though, it sounds like something is wrong with your engine. Aleros tend to be pretty peppy. Even the four cylinder versions.

https://sites.google.com/site/alerom...e/transmission
In the link it talks a bit about the shift kit.
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