3500 Differences from Previous 3x00s

[onefastV6]

Camshaft Info

The 3500 camshaft shares the same part # as the 2003+ 3400 cam.

[gpse3400]

I'd like to think if the new ignition module is wired the same way, then the signals it sends out to the main computer, might be the same as well. I mean couldn't someone just drop in the engine and try to run it with the the new hardware? I mean I know the new MAP sensor works well with the old system. I'm sure a few moments a with the factory manual should indicate it all. Hell maybe we could even adjust part of our programming for it. Sounds better than chopping up the crank.

From what I know the 3400 in the Equinox uses the same style exhaust manifolds as a 3400 from a W car'97+ or a late N car, but thy used the 3500 heads. The newer W cars have head pipes like the 3800 that are still routed "classic" style.

[onefastV6]

Here is a 3500 gasket set.

Notice the plenum gaskets are now metal.

GM Part #12594816

[El_Diablo]

From what I know the 3400 in the Equinox uses the same style exhaust manifolds as a 3400 from a W car'97+ or a late N car, but thy used the 3500 heads. The newer W cars have head pipes like the 3800 that are still routed "classic" style.

hate to bring up a dead subject, but has anyone dug into an equinox 3400 to verify?

[Superdave]

here are some fun pictures i thought you guys would enjoy...

3500 exhaust gasket lined up with the bolt holes on a gen2 3.1 exhaust manifold...

http://www.superdave81.com/mini-3500%20037.jpg

http://www.superdave81.com/mini-3500%20035.jpg

1 5/8" VS 1 1/8"... haha

Also, contridictory to previous posting, there is zero change between the exhaust manifold bolt spacing on the 3500, 3400 and gen2's.

Also, It looks as there is no overlap problems using the 3400 exhaust manifolds on the 3500. the 3400 gasket lines up perfect. I'll post more pics later...

[torq455]

this is so cool! i was just thinking yesterday about at least putting on some 3500 exhaust manifolds since headers are financially out of reach.

[1988GTU]

here are some fun pictures i thought you guys would enjoy...

3500 exhaust gasket lined up with the bolt holes on a gen2 3.1 exhaust manifold...

http://www.superdave81.com/mini-3500%20037.jpg

http://www.superdave81.com/mini-3500%20035.jpg

1 5/8" VS 1 1/8"... haha

Also, contridictory to previous posting, there is zero change between the exhaust manifold bolt spacing on the 3500, 3400 and gen2's.

Also, It looks as there is no overlap problems using the 3400 exhaust manifolds on the 3500. the 3400 gasket lines up perfect. I'll post more pics later...

So a 3.1MPFI can utilize the 3500 exhaust manifolds?
If so.... Sahweet!

[Superdave]

use the 3400 manifolds on a 3.1, not the 3500's. the 3500 manifolds are angled strange and most likely would not work in most gen2 applications.


3400 manifolds are a huge upgrade from the gen2's, lots of people have used them on 3.1's with noticible gains. And the most important thing... they fit right.

[torq455]

what do you mean angled strange? the relationship between the heads is the same so wouldn't it be angled strange for the 3500 too.

[kflo 93 gt]

I've had a set of 3400 exhaust manifolds in my garage forever and have comparison pics of them with my headers. The headers are going on my car, and the manifolds on my buddies 3.1 5 spd beretta.

[Superdave]

what do you mean angled strange? the relationship between the heads is the same so wouldn't it be angled strange for the 3500 too.

http://www.superdave81.com/mini-3500%20008.jpg

you can see in that pic, the rear one aims right at the firewall, the front one sticks way out... on a Jbody it would be sticking into the radiator, and you'd still have to run the exhaust under the oil pan. Deffenetly not worth the minimal gains over using the 3400 manifolds.

[onefastV6]

yeah, but remember there are 3500 exhaust manifolds that are setup with the cross over pipe that goes over the tranny.

[Superdave]

yeah, but remember there are 3500 exhaust manifolds that are setup with the cross over pipe that goes over the tranny.

If that's the case then i'm sure they could be used... still not going to be much if any gain over 3400 manifolds. Sure they're bigger inside but the 3.1 isn't going to flow enough to take advantage of that.

besides torq455, have you checked v6z24.com lately? ginobeats has a good lead on headers for the Jbody for a decent price... six shooter is also talking about building a few sets. Hell, i just sold my equal length longtubes for $350

[torq455]

yes Dave, i've heard about the headers. still have not heard a price but 800-1000 Canadian. trying to find out if it's worth it to change the exhaust with manifolds or headers. it's looking like another year i'll have to wait to build this damn engine. but, if i can get headers like yours for 350ish, i'd do it somehow!!! wish i knew about your headers. DOOGHHH!

thanks for the pic and pointing out that strange angle. it all looks great on the bigger engine compartment of the malibu.

[Superdave]

here is a 3400 gasket on a dirty 3.1 exhaust manifold:

http://www.superdave81.com/Z24/gen2w-gen3gaskt.jpg