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AWeb80
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« on: November 07, 2006, 10:20:27 PM » |
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ok ok ok....i know matt already made a post about this.....but...i've heard w/ a 94 3100 motor, for some reason, you can't swap top ends...is this true and who has heard anything about it....
....by top ends, i'm talking lower and upper intakes....i've heard that something in the lowers gets in the way....like pushrods or something on the 94's.....
...i think the upper manifold would be easy yes.....and the bolt holes do line up right?
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 I pwn myself daily. |
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AWeb80
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« Reply #1 on: November 10, 2006, 11:04:10 AM » |
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anyone?
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TurboSedan
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« Reply #2 on: November 10, 2006, 11:37:56 AM » |
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i can't think of any differences in the '94 3100 specifically besides them using plastic valve covers IIRC. anyone else?
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  2000 Audi A6 Quattro - 2.7T/6-speed 1998 Buick Regal GS - L67/4T65E-HD |
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GOT2B GM
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« Reply #3 on: November 10, 2006, 01:40:14 PM » |
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I think it has something to do with the rocker arms. Talk to John GP1138 i'm sure he knows.
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Matt Shantz   1990 Pontiac Turbo Grand Prix 14.6829 @ 95.11 mph - 80K In Hibernation 1991 Oldsmobile Cutlass Supreme International LQ1 equipped - 48k 1988 Pontiac Fiero GT 5spd - 82K In Hibernaton 1987 Chevrolet Cavalier RS Z24 clone - mothballed |
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Robby1870
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« Reply #4 on: November 10, 2006, 01:44:50 PM » |
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I think it has something to do with the rocker arms. Talk to John GP1138 i'm sure he knows. The rocker arms could be a problem. 94 3100's had stamped rockers, 3400's had roller fulcrum rockers. The roller fulcrum rockers have a notch in the head where the rocker pedestal mounts, the stamped rocker heads don't. However, if you went to a full 3400 topend on a 94 3100 block, you might need custom length pushrods, although I would think the 3400 pushrods would work. Also, the EGR's are different between the two. |
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Robby Whitesell 1990 Pontiac Grand Prix STE 1985 Toyota Pickup 2WD 2.4L I4 |
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TurboSedan
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« Reply #5 on: November 10, 2006, 01:56:27 PM » |
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oh, i thought you meant the '94 year 3100 in particular. yeah they have stamped rockers. roller fulcrum rockers started in '96.
if you did a 3400 topend swap (or '00+ 3100 topend - same thing) you'd have to use custom length pushrods so your non-roller cam and the roller fulcrum rockers would work together.
personally i'd just find a complete good running 3400 for $400 and throw it in.
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SappySE107
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« Reply #6 on: November 23, 2006, 06:15:08 PM » |
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No, none of this is correct. The pushrods are the same length. All 3100 motors use 1.6:1 rockers and the same cam and lifters. The problem is with the non roller rockers hitting the lower intake. You can test fit it with the lower intake on and turn the engine over by hand. You should see where its hitting (2-4 will hit, brad on 60V6 knows as he did this swap).
However, I think you should use 3500 heads and manifolds instead. It makes most ported 3400 setups look like chumps. Think of it like ported your small port 3100 stuff compared to using 3400 parts. 3500 owns 3400.
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Ben
WOT-Tech.com
60DegreeV6.com
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TurboSedan
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« Reply #7 on: November 23, 2006, 06:57:52 PM » |
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ah crap, sorry about that misinformation  i started thinking of 3x00 topend on a 3.1 for some reason btw nice to see you here Ben  |
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2000 Audi A6 Quattro - 2.7T/6-speed 1998 Buick Regal GS - L67/4T65E-HD |
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AWeb80
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« Reply #8 on: November 24, 2006, 07:53:29 AM » |
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thanks ben.
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Blackbombshell95
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« Reply #9 on: November 28, 2006, 10:03:59 PM » |
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Are the modifications to bolt the 3500 topend to a 3400 the same modifications required bolt the 3500 topend to a Early Gen III 3100?
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COREY's 95 3100 - intake/exhaust/UDP/DB Zex 75 wet shot 96 Red Coupe - HUD SEA & PDX ClubGP member  |
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DiscoStudd
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« Reply #10 on: November 28, 2006, 11:42:40 PM » |
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Nobody seems interested, but I'm tellin' ya, someone needs to be the first to do a 3900 swap!
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 Kevin B.2004 Chevy Impala 1993 Chevy S-10 |
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Darin
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« Reply #11 on: November 28, 2006, 11:55:25 PM » |
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Nobody seems interested, but I'm tellin' ya, someone needs to be the first to do a 3900 swap! You talking about upper end swap? or complete 3100-3900 swap? |
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DiscoStudd
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« Reply #12 on: November 28, 2006, 11:59:32 PM » |
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Nobody seems interested, but I'm tellin' ya, someone needs to be the first to do a 3900 swap! You talking about upper end swap? or complete 3100-3900 swap? The whole drivetrain. http://gmwbody.com/viewtopic.php?t=226&highlight= |
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Kevin B.2004 Chevy Impala 1993 Chevy S-10
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Dstanic
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« Reply #13 on: November 29, 2006, 05:28:15 AM » |
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Where we gonna find the engine? It's only been popular in the minivans since the 2007 model, other than that only a few w-bodys and the occational G6 GTP...
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 Dave _ 2003 Impala LS_ berry metallic _ SERIES II 3800 |
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pat
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« Reply #14 on: November 29, 2006, 06:34:06 AM » |
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the last 3900 i saw on ebay was $2900. i'll wait till they are more common
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1990 turbo grand prix
Scaring the religious right since 1980
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Topic: 3100 to 3400 top end (Read 4854 times)
