Bansil
Body Damage is Cool
Reged: 04/02/03
Posts: 1994
Loc: Under my wifes RODEO in EastTN
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Ok pulled 3.4 out of trooper.Crank is broke,between #2 rod journal and #2 crank journal(not at one of the fillets either)it was a nasty break,it took out the block,as crank swung around it pushed the front main cap forward and elongated the bolt hole and cracked the block from the inside out,thru the bolt hole.....oh and a couple pistons,rods etc....now my question.
3.4's are not too common--out of camaros/firebirds
3.1/2.8 out of troopers are cheap
I am looking at a 3.1 out of a trooper right now.
Will the 3.4 serpentine belt assembly bolt to the 3.1 block?
3.4's out of fwd's are cheap
What is the difference between the FWD and RWD blocks?I know it's been covered but couldn't find anything.
I looked at a 3.4 out of a fwd van,it had the starter on the drvrside of the block.
How interchangeable are 60* parts between each other?can cams/heads etc be swapped,how about a 3.4 crank into a 3.1 block etc.......
I've only really messed with 90* v8's.......so new ground.
Why isn't the 3.1 a swap people are doing?Not enough power gain?or lack of engines.
Also are all 3.1/3.4 cranks drilled for bushings in the end(for tranny support?)
Thanks
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98 Rodeo(hers)
00 Rodeo(his)
Lisa's Rodeo
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Bigpoppax2
Roll Me Over
Reged: 04/22/02
Posts: 2529
Loc: Bluefield, Virginia
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Doug the 3.1 is about as anemic as the 2.8 was. I'm guessing that's the biggest reason the 3.1's aren't very sought after. I believe the 3.1 had just a hair more torque but about the same horsepower as the 2.8.
Joe
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A gun in the hand is better than a cop on the phone.
98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.
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Bansil
Body Damage is Cool
Reged: 04/02/03
Posts: 1994
Loc: Under my wifes RODEO in EastTN
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That is kinda what I was wondering,like if you can use the 3.4 cam and heads (if they have smaller combustion chambers,bigger valves etc.)
Is the difference in the 3.1--->3.4 a stroke thing or is it
bore size etc.
I just couldn't find any good info like on the 90* stuff.
Thanks
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98 Rodeo(hers)
00 Rodeo(his)
Lisa's Rodeo
Edited by Bansil (06/27/06 12:39 PM)
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1jackleg
Wheeler
Reged: 05/22/05
Posts: 207
Loc: Oconee South Carolina
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Bansil,
I have talked to Ed in the past about the 2.8/3.1. I am going to try what he is running. A 2.8 bored 0.30" and stroked with a 3.1 crank kit. He stated that this yeilds a 3.2 and one should get...
"so I'd say you could conservatively build a 3.1 to put out a strong 150 HP and a nice chunk of torque. The a 2.8 bored out .030" over and 'stroked' with a 3.1 crank displaces 3.2L, so it's not really that far removed from a 3.4 anyway."
He sent me a good bit of detailed information if you would like to read any of it. May cost the same in the long run, but the parts should be easy to get. Seemed like a fairly easy way to get the job done to me...and more power.
HTH - JL
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I ain't real bright...
1990 Trooper LS, V6, Auto, 4door
132,000 miles 11/26/09
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Bigpoppax2
Roll Me Over
Reged: 04/22/02
Posts: 2529
Loc: Bluefield, Virginia
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Doug
The 2.8 is a 89mm bore and 76mm stroke
LC1 82-84 2 brl High output (ha Ha) 102hp and 145ft-lbs (came in the camaro and firebird)
LR2 82-90 (truck version) 2 brl 115hp and 150ft-lbs (came in the S10, S10 blazer, S15, S15 Jimmy, Jeep cheerokee and comanche, and the 90-91 Trooper)
LL1 83-84. It was an optional ("L-code") engine on the Pontiac Firebird with 125 hp (93 kW).
I found some good info here:
http://en.wikipedia.org/wiki/GM_60-Degree_V6_engine#L82
http://www.s-series.org/htm/tech/GMPerfParts/144-148.pdf
Happy reading!
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A gun in the hand is better than a cop on the phone.
98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.
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Bansil
Body Damage is Cool
Reged: 04/02/03
Posts: 1994
Loc: Under my wifes RODEO in EastTN
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Jackleg I would be interested in the info,thanks let me know how.
Joe,thanks bro.
Spent some time at the JY today.....talking with J.J. yes that's his name.
He said I was crazy that the starter on the camaro was on the wrong side to work,I told him It fits and gave him the block number he was amazed,then he showed me a lumina with a 3.4 in it......the starter was on the same side 
but he said no mouter mounts were drilled or the bosses even cast.......he tried the swap on a 90 2.8 trooper himself.....
..so whats the difference between a fwd/rwd 3.4??? if it's just the lack of motor mounts,that can be fixed fairly easy for alot less money cause fwd motors are cheap.......
All I need is the long block assemble for it to work....
As long as the crank is drilled for a bushing.....I guess I can just bore it out for a bushing since the lower end will be rebuilt anyways.
Thoughts???????
Bansil
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98 Rodeo(hers)
00 Rodeo(his)
Lisa's Rodeo
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Ed Mc
Body Damage is Cool
Reged: 12/25/99
Posts: 1029
Loc: Poulsbo, WA 98370-8125, Kitsap...
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Well for starters, all the 3.1/3100/3.4/3400 cranks are virtually identical and any can be used with our setup. The biggest diff in these cranks is whether there's a reluctor ring on the crank to run the crank-fired sensor that is utilized by various motors using SFI or MPFI. Other FWD'ers used a distributor and may or may not have a crank with reluctor ring. In our case, we are slamming a distributor in there so whether or not there's a reluctor ring is 'no importa'. All cranks come drilled for a pilot bushing so that don't matter either.
As far as a FWD block goes, yes the starter is on the correct side for a 4WD GM-ZuZu application.
Some areas of concern on the FWD 3400 blocks that I've seen are the fact that they have aluminum heads and the TBI intake won't bolt up. So, you'd have to either totally rewire the EFI system (not a small task), or slap on a set of RWD cast-iron heads. Which poses the next problem, since the alum heads have smaller combustion chambers, the pistons that go with have larger 'dishes' in the pistons, which keep compression ratios to a reasonable level.
So, cast-iron heads on an otherwise unchanged FWD 3400 block would yield very low (and probably unuseable) compression ratios. Not So Good unless you want to turbo or supercharge it!
So, change out the pistons to RWD ones with less dish (AFAIK the only ones would be for a RWD 3.4 in a Camaro, or for a slight compression boost the ones out of a Z34 DOHC motor).
Then, you'll have issues with the oil pan because FWD 3400's use a cast-aluminum oil pan with cross-bolted main bearing caps. Very strong and a definite improvement but I don't expect it's going to fit that 4WD axle.
Then there's the question of motor mounts, you'd have to sight the FWD block to check position of the mount holes to be sure. Or do whatever mods necessary to make it fit.
If you could solve the fitment issues on the Front-Driver, and wire in a performance-oriented EFI system, you could build a very strong motor indeed. The FWD alum heads flow much better than the cast-iron RWD ones.
Of course, it's lots simpler to bolt in a cast-iron-headed 3.4, use the TBI setup and throw some performance goodies on it. Good for somewhere between 180 and 200 HP which motivates the Ol' Troop along quite nicely!
Plus it's all Stone Age Cheap and Simple. Lots to be said for Cheap and Simple!
Regarding the 3.1, since it's got the longer-stroke crank you're getting quite a bit of torque improvement over the 2.8. Just jazz up the breathing on both ends and a little Hi-Po camshaft action and she should run out pretty good.
The advantege here is being able to use a GM-Isuzu block with the starter on the driver's side already, "no drilling required". At least now there's a ~~$60 kit available from the Fiero Dudes to greatly simplify the drilling task.
Don't forget that the TBI cast-iron heads are all the same, so as long as your 'grenaded' motor didn't destroy the heads, you can use them on any RWD 2.8/3.1/3.4.
BTW if you want to off the deep end, technically speaking, cruise this site for a while; it'll stretch your brain cells a bit!
http://60degreev6.com/
Check out this buildup which would probably work in a 'Zu (except for that pesky cast-alum oil pan!), but don't expect would be very cheap:
http://www.fierosound.com/34engine/3400details.htm
Cheers............ed
P.S. Big Bummer on the Broke Motor! 
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'90 Troop 3.4 LS
'89 Troop RS (Has Valve Issues, needs Counseling)
HI, I'm Ed and I'm a Trooper-holic!
Keep On Troopin'......
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maxwell417
Rock Warrior
Reged: 10/01/01
Posts: 945
Loc: Clear h2o Kansas USA
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I searched www.car-part.com for a 1994 3.4v6 Engine out of a Chevy Camaro in TN. And found dozen or so from $345 to $600. I'd search then call around. Try to get some kinda warrantee or hear it run.
HTH
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Curt B 89RS Calmini Header Delta Cam 33x10.5 BFG MTs & 90 Trooper 3.4 v6, SAS D44 ARB/Hobart 5.38s 35s my pictures
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Bansil
Body Damage is Cool
Reged: 04/02/03
Posts: 1994
Loc: Under my wifes RODEO in EastTN
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Good tech thanks guys.
As for JY motors,yes you can get a $500 motor but it will
not have a warranty(gotta take most of the motor apart)and
I've had several tell me "oh and theres a core charge--which
is B.S....because if you need a "new" engine(from a JY) than the old ones probably pretty bad.
Thanks for the linky also
Bansil
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98 Rodeo(hers)
00 Rodeo(his)
Lisa's Rodeo
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Rodeo Guy
Body Damage is Cool
Reged: 12/07/02
Posts: 1074
Loc: woodbridge, va
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Doug, JoeD told me he has a built up 2.8 for sale. Supposed to have more power than a stock 3.4. Maybe an option for yah.
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Mike
"Damn the carnage! Full throttle ahead!"
95.5 rodeo, 37" Trxus MT, dana 44/9", coil-overs, lockers..... http://www.cardomain.com/memberpage/550454
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