V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

is the 3.4 "U" Intake better than the 3rd Gen design?

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Old Aug 4, 2003 | 06:49 PM
  #1  
Lee7's Avatar
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Car: 88 BMW 535i
Engine: 3.5L M30
Transmission: 4HP22E
is the 3.4 "U" Intake better than the 3rd Gen design?

just wondering.
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Old Aug 4, 2003 | 07:20 PM
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Gumby's Avatar
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
I don't like the 3.4 intake but I do like the 6 pack of coils that usually sits there. There is alot of waste in the cap n rotor system.

Matt
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Old Aug 4, 2003 | 07:23 PM
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Dale's Avatar
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Only advantage I see is that you dont have to keep taking the upper intake apart to change fuel injectors.
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Old Aug 4, 2003 | 09:05 PM
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I can see an advantage, as it should keep velocity better, Vs the stock "open box"
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Old Aug 5, 2003 | 09:23 AM
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Project: 85 2.8 bird's Avatar
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
yeah, shorter runner legnth.
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Old Aug 5, 2003 | 03:28 PM
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As is, I'm not sure which is better, but I doubt there's any real performance difference. Its a little easier to diasassemble, with less chance of a vaccum leak, but you cant take it apart to port it either, like you can a 2.8 intake. I like the looks of the 2.8 "Klingon" intake better myself!
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Old Aug 5, 2003 | 03:45 PM
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Lee7's Avatar
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Car: 88 BMW 535i
Engine: 3.5L M30
Transmission: 4HP22E
Originally posted by LT1guy
As is, I'm not sure which is better, but I doubt there's any real performance difference. Its a little easier to diasassemble, with less chance of a vaccum leak, but you cant take it apart to port it either, like you can a 2.8 intake. I like the looks of the 2.8 "Klingon" intake better myself!
hehe, yeah. It would be really hard to port the 3.4 intake setup, while the 2.8 setup is fairly easy with a Dremel Flexshaft.

The 2.8 setup also looks cool.
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Old Aug 8, 2003 | 02:21 AM
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From: East Tennessee
Car: 1992 Z28 Heritage Edition
Engine: L98
Transmission: T56
Axle/Gears: 3.23:1
3.4 Intake manifold can be made to work on a 2.8/3.1

Here's a '91 Z24. Granted its a FWD setup, but he's still using the same basic 3.1 setup the RWD would.

Running iron heads as opposed to the FWD's aluminum.

http://turboz24.com/Pics/Current_Engine_29.JPG

http://www.turboz24.com
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Old Aug 8, 2003 | 09:11 AM
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From: St. Louis, MO
Car: 85' Firebird (Project), 92' RS
Engine: 2.8L, LS1
Transmission: 700R4, 4L60E
Axle/Gears: 3.42 Open , 10 Bolt (ukn)
well we'd have to get the one off the camaro, also noticed he had coil packs. but, with us running ole' iron heads swaping to that intake puts at the firewall once again, the 3.4L camar owould have to do...but i doubt we'd see any noticeable performance gains from the swap anyway. but, only trying it out would ever tell.
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Old Aug 8, 2003 | 09:37 AM
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Project: 85 2.8 bird's Avatar
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
Where's the egr on that sucker?

When I did the swap, I already placed the 3.4 upper on the car. The thottle cable & TV will need to be modified to fit, the top nub on the 3.4 tb opening needs to be ground to let the 2.8/3.1 tb fit. Also, you will need use the 3.4 egr, as the tube is made for the short legnth.

THis egr, though is digital, so doing ait to a 2.8 will be difficult~impossible unless you rewire it to 3.1 specs.
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