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 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
#875483
03/16/08 03:15 AM
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Joined: Apr 2007
Posts: 56
OP
Getting the Wheeling Fever
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Well, anyone who has dealt with the butterfly issue must have raised an eyebrow to all the extra intake plumbing left over.
Once the butterflies are gone, the intake air has to pass through a whirlwind of tubing to get where it has to go. This must rob some valuable HP!
On to the question...
Can we simply bolt a 3000gt or stealth intake to the engine and maintain/increase the power? If so, which intakes?
Thanks for the help!
1994 Montero SR
Divide Colorado
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: reknawj]
#875484
03/16/08 04:46 AM
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Joined: Apr 2006
Posts: 1,193
Body Damage is Cool
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no............ diff manifold
it dosent have to be surrounded by water to be an island
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: mxmikie]
#875485
03/16/08 05:52 AM
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Joined: Apr 2007
Posts: 56
OP
Getting the Wheeling Fever
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of course I would imagine some effort would be involved, mods etc.!
How about a later model manifold without the stupid lower butterfly assembly? A 1998 perhaps? i would like my air straight up! know what I mean...
1994 Montero SR
Divide Colorado
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: reknawj]
#875486
03/16/08 06:53 AM
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Joined: Sep 2004
Posts: 4,479
Roll Me Over
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I think its too different to make it work without swapping other things like the wiring harness and the rest of the electronics. Its best just to do a search on the subject and see what other Gen2 owners did to resolve the butterfly issue.
Richard E 1989 Montero - Stock-ish 1989 V6 Auto Raider - 5.3 Vortech Swap. 1987 Mitsubishi Starion 2.6t, soon to be 3.5 1983 Honda XL600R 
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: reknawj]
#875487
03/16/08 09:55 AM
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Joined: Sep 2006
Posts: 2,712
Roll Me Over
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The 3.5 DOHC has full round ports in the lower manifold, considerably larger then the 3K upper. The 3.5 and 3.8 SOHC 24V manifolds do have the same ports as the 3K GT upper and that manifold does bolt on to the SOHC lowers. Even clears the COP on the new engines. The SOHC lower will not go on a DOHC engine.
I do not find the 3K manifold to be the proper option for eliminating all the stupid ports on a DOHC. I would have done so on mine. Now this does not mean it won't work.
I have a 3" thick block of phenolic sitting here intending to become a new center manifold and will weld over the side ports of the upper.
Once I have another full manifold in hand I will undertake modding one, might just hack and weld one to get the job done quickly.
Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: OldColt]
#875488
03/16/08 02:02 PM
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Joined: Apr 2007
Posts: 56
OP
Getting the Wheeling Fever
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The 3.5 DOHC has full round ports in the lower manifold, considerably larger then the 3K upper. The 3.5 and 3.8 SOHC 24V manifolds do have the same ports as the 3K GT upper and that manifold does bolt on to the SOHC lowers. Even clears the COP on the new engines. The SOHC lower will not go on a DOHC engine.
I do not find the 3K manifold to be the proper option for eliminating all the stupid ports on a DOHC. I would have done so on mine. Now this does not mean it won't work.
I have a 3" thick block of phenolic sitting here intending to become a new center manifold and will weld over the side ports of the upper.
Once I have another full manifold in hand I will undertake modding one, might just hack and weld one to get the job done quickly. Thanks for the reply, obviously you have my similar feelings! What about the intake off a '98? It looks like the same lower, just that the TB would be to the rear. Maybe a few different hookups too!
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: reknawj]
#875489
03/16/08 03:29 PM
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Joined: Sep 2006
Posts: 2,712
Roll Me Over
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It is not allot of work to move the TB location on an upper. Most anyone with aluminum welding experience can get that done.
Any of the uppers will have smaller runners than what came on the 3.5 DOHC, swapping to these may not be the wrong thing. I do not have any other Montero uppers other than the original on my SR so I do not have first hand answers for you. Maybe it is time I go back to buying parts and learning more.
If anyone has any later 3.5 or 3.8 upper intakes not being used I would be very willing to develop something that may get this group a more efficient work around for the DOHC intake issues.
Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: OldColt]
#875490
03/16/08 08:13 PM
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Joined: Apr 2007
Posts: 56
OP
Getting the Wheeling Fever
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I could/would do the same, it's more an issue of the extra loot! Rebuilding these things is certainly not cheap. I'll pay for anyones shipping of spares for "the cause" though!
In a nutshell, the goal is to throw away the old defective plenum and buy a different 40 dollar or so plenum from another, slap it on and maintain Hp and Torque.
Simply removing the butterflies must reduce HP.
1994 Montero SR
Divide Colorado
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: reknawj]
#875491
03/16/08 09:12 PM
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Joined: Sep 2001
Posts: 8,557
Forum Moderator
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Simply removing the butterflies must reduce HP. You sure about that?
87 Raider 4D56td v5MT1
31's..Basically Stock
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Re: 3000gt intake compatible with monty 3.5 to eliminate butterfly issue
[Re: LandRaider]
#875492
03/16/08 09:32 PM
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Joined: Apr 2007
Posts: 56
OP
Getting the Wheeling Fever
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Have you seen the thing? It looks like a damn figure 8! The air won't go straight down, well it will but not before passing two separate intake passages. I'm no expert but I can't help but think that all of the resulting turbulence would be a negative. All I have to do is look at the design of simpler intakes.
1994 Montero SR
Divide Colorado
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