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

2.8 tbi to 3.4l sfi??

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Old Sep 25, 2002 | 07:07 AM
  #1  
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
2.8 tbi to 3.4l sfi??

Ok, since you guys are more knowleadgble on these engines, and the swap process. Heres what im wanting to do, and why.
My show truck 2.8l tbi, I thought the prev owner had installed a cam, 3.4 kit, etc, etc. Come to find out, then engine had never been taken apart, and he use to run a 125 shot nos. To say the least, I think I am about to retire this beast, plus I want something at shows to make people go . So heres what I want to do......
Buy a 93-95 3.4l 5 speed 4th gen, put the FULL engine, thats right, 3.4l sfi dis ignition and ALL in my show truck. I know this requires using its brain and all, do you think I would bealbe to make it work on my s10 dash, and other equpiment?? Any thoughts?? Yea, na, don't even try it?? Etc. I want to hear plus and minius of all of it.
OO, and I think my headers, crank/alt pully, I have an elec fan, should all work, the only thing I am unsure of is the coil, since it uses DIS, w/o a distrib I hate them damn things!!!!!
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Old Sep 25, 2002 | 09:26 AM
  #2  
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From: Elkton MD USA
Car: 1983, 1986
Engine: 2.8 2bbl, 2.8 MPFI
Transmission: 200C 3 speed, 700R4
Axle/Gears: 3.08, 3.42
I think it will work but will be alot more work than putting the 2.8 stuff on the 3.4 block (but you already know that). All of your current stuff will work on the new motor. If you hate DIS that much I'd stick to using the 2.8 stuff on the 3.4 motor as you would have a distributor then. Wow factor may be there but If you really want to wow 'em stuff a BB or a Hemi in there
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Old Sep 25, 2002 | 09:36 AM
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
NO NO, I hate distributors, with DIS I dont have that I know it will be alot of wiring, but should bolt right it, just the wiring has me if it will work on my current s10 dash.

I think having that upper intake rail polished would look PHAT and get alot of attention.
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Old Sep 25, 2002 | 09:43 AM
  #4  
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From: Elkton MD USA
Car: 1983, 1986
Engine: 2.8 2bbl, 2.8 MPFI
Transmission: 200C 3 speed, 700R4
Axle/Gears: 3.08, 3.42
It should work with the dash as your S-10 is a 93 and the first year for the 3.4 F-bodies was 93. I think the general under dash wiring is similar (electric speedo, etc.) It will really only be the computer/ engine harness that's needed.
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Old Sep 25, 2002 | 10:37 AM
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From: ****SoCal, USA****
I've chatted with Dale already.
For show factor, you could just leave it non-operational!
Reality is that it can certainly be intergrated.
The cost is the factor.
Howell Engineering in Michigan can tackle this job, too (wiring).
Turbo City, too 714-639-4933
Bill Howell used to work for GM. You WANT & WILL PAY for his knowledge, too.
For REAL wow factor, add the Sunbird dash like a Syclone. OR ADD THE CAMARO/FIREBIRD dash!
My Wow factor in my Blazer?
Not knowing the 3.4 engine swap.
I've added Fiero seats (w/speakers in headrests)
& GTO center console (it's a full length altered slightly) using a 1963 SS Nova floor shifter, & having the dash shifter indicator show out shift position.
Ask any questions ya can.
OH
GET ONLY THE MOST COMPLETE LOW MILAGE EXAMPLE YA CAN FIND!
Spend the most ya need to to obtain it that way!
Second biggest tip I can offer.
I pay $800 & $900 for my swap motors.
I get everything & so should your 3.4 long block purchase. I don't need to rebuild a low milage mill either, so many miles of smiles left for the road, too!

Last edited by KED85; Sep 25, 2002 at 10:42 AM.
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Old Sep 25, 2002 | 11:58 AM
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Thanks for chatting with me ked!!! :hail: I am considering all options here. Thats why I came here to get opinions. I personally like that I wont have a distrib. I was also thinking of just trying to find a 93(prefered) up to 95 full 4th gen with trashed body and put the seats and center consel in mrs car, and then put engine and elec system in my s10, and part the rest out. I know it will cost a bit, im not talking next month, I'm talking 6-9 months down the road, I am doing research (as ked said, but planned on it anyway). I read that the 3.4l sfi has a 160hp motor stock, vs my 125 hp "stock" motor. Plus, most of my performance goodies minus coil and wires (big deal) will swap to this motor. Something ked mentioned which I forgot was throttle cable. My trucks a standard, so they should have same tranny and no auto. wires, cables es. I have almost got my interiour done, but thanks for the thoughts on the dash. I do want the 115 mph dash or digi. one though. Tonight I should have my air adjustable suspension done .

O yea, will 1:52 rockers still work on the 3.4l?? And will the 2.8-3.1l chrome valve covers work on the 3.4l??
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Old Sep 25, 2002 | 12:00 PM
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
On our f-bodies, most of the dash is separate from the engine harness... for example, our oil pressure and water temp gauges (or idiot lights). They just run to sensor wires, and as long as there's a sensor in the engine compartment, the gauges work. Only difficulty would be the VSS and tachometer. You'd have to find out which wire runs the tach, and make sure it's compatible with a DIS system. If your S10 doesn't even have a tach, you could install an aftermarket one "fresh", but I don't know how they'd hook up to DIS. Even better idea would be to buy the $400 MSD DIS-4 box; I'm sure that has a standard tach output (like the 6AL box does).

Our f-body dash harness comes in from the driver-side pass-thru, right by the brake booster. The engine/ECM harness goes thru the passenger-side pass thru, inside the passenger fender, and all those wires terminate right at the ECM.
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Old Sep 25, 2002 | 02:26 PM
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Tomp, thanks for the thoughts. On my s10 the wire harness comes thru the left side also, the brain is to be behind the glove box, it has gotten reloacted to under the drivers seat.
I thought of fuel pressure, got that one licked, I just put a pump from a 93 4.3l cpi engine, it runs a little above what the 3.4l requires, if that pump wont clip in.
VSS, I think if I use my stock tranny, I wont have to worry about that. If nothing else, I will use the camaro tranny, and MAYBE have to have an alumminum driveshaft made .
I have put an aftermarket tach on it, and is hooked to one of the coil wires, I'm sure their is a way to hook up to a dis system, even w/o that msd box ( on price)

Keep thoughts n comments coming, Your helping alot!!! :hail:
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Old Sep 25, 2002 | 10:19 PM
  #9  
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From: ****SoCal, USA****
OF Course 1.52 roller tip rocker will assit your gains in more power.
Chrome covers?
You'd have to trial fit.
Fit, SURE, have ALL the attachments/brackets ya need during the swap?
That's a different matter.
My old Style S-10 Blzer valve covers have brackets attached for some cable.
You have a stick?
MAY eliminate some problems.
WHAT YA NEED ARE
printouts of the 93-95 SFI intake/PVC set up w/cable routing from GM Parts counters.
Give the guy a brew for his troubles.
GET LIST OF PART NUMBERS.
Keep sourcing out all problems.
WHAT YA ALSO NEED is an engine source.
Any luck?
MAYBE A 1993-to end of F Body Helms shop book or the Large Chiltons (time magazine size).
Ya need to compare pics & such
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Old Sep 26, 2002 | 07:03 AM
  #10  
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
I did go and get the haynes manuals, and been looking at the wiring diagrams.

I already have feelers out on the market for the engine. A friend who works at a parts store, said one of his cust. is looking for a 4gen to install a beast of a engine in. Said he will talk to him and try and work out a deal for me to get a 3.4l w/electronics

I knew having a manual would help alot.

Did the 3.4l come with a 5speed or a 6speed?? This book list both, but why would a 6cyl come with a 6 speed? I would love it if it did.

I noticed something else, VAT system. I'm sure I could over ride it, but it would be major PHAT to have vats installed on my truck, think the coloum would bolt up n fit??

Thanks for the info on the 1:52's. I will test fit me some chomes when I get the engine.

There was a 3.4l engine on ebay for 150 yesterday, I was foaming at the mouth. To bad I have to get it in person, and doesn't have the wire harness
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Old Sep 26, 2002 | 09:13 AM
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KED85's Avatar
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From: ****SoCal, USA****
A PHAT VATS SYSTEM

That call is entirely yours!
I am very sure it can be done, tho.
Steering stuff is VERY COMMON upon knowledge gained by rebuilding.
It could only be wiring & a sensor swap in the end.
I do not know that detail.

Ask insurace companies where they send the late model wrecks.
Can find a complete car that way too.
What's your budget?
Keep thinking.
Keep asking.
It can be done, probably easy.

NOTICE I RECOMMENDED ROLLER TIP rockers.
Too tall valve covers interfer with the MPFI intake set up. AT THE MOMENT you do not care on that MPFI detail. Future thought.
The 3.4 cam is aggressive.
Keep it at 1.52
1.6 COULD interfer with piston tops.
And the gain from 1.52 to 1.6 on a factory delivered 3.4 is kinda minimal (maybe 3-4 more hp at top end, big deal unless you drag race all time).

A five or six speed. Ask that on the tranny side!
BUT checking my 1995 Pontiac product line brochure (from dealer)
3.4 had 5-speed (std). Auto-optional.
6 speed ONLY (says brochure) V-8.

The weak point on these V-6 is valve guides on heads, They wear quickly.
A high milage 3.4 quick rebuild is new oil pump, new chain, new main bearings, rebuild heads.
Happy hunting.
It's fun at this stage.
It's also still fun at the stage I'm at in my 3.4 swap in my Blazer.
Almost "turn the key to adjust valves by cylinder compression" there.
Details make swaps work right!
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Old Sep 26, 2002 | 09:38 AM
  #12  
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
I had brain thought. If I get a 93 wire harness, gm uses commen plugs withing their system, a camaro harness may just plug into the back of my cluster, and walal. Like tom said, they prob use same sensors also, which in turn create same signal. I know im praying, but its just a thought. Then wire my interiour lights, etc up to it. I may just run two fuse boxes, one for lights, etc, and other for just the pcm and engine. Praying I find an engine cheap also.

Ked, budget allows, HA, does having a 450 a month truck payment, 18000 on plastic, looking to buy house, and wife and kid sound like a budget on a single income?? I take about any 3.4l I can find, rest sounds like some piddly parts, and alot of labor. I do work myself usually, so labor cost nothing. However, I may have to buy you a plan ticket for a week to come help me do this whenever I find a motor
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Old Sep 26, 2002 | 09:40 AM
  #13  
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
OO, and the tranny comment sounds right. This cheap haynes dosnt list it engine spacific. Would be awasome to find a 6 speed for a v6

Hum, steering colum rebuild . I need to find a junker one and tinker.
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Old Sep 26, 2002 | 10:15 AM
  #14  
KED85's Avatar
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From: ****SoCal, USA****
You will be so pleased to discover how easy the swap is.
Everything fits & works well.
FYI
Some people have scored 3.4 for $200
Keep Searching.
And whatever ya rebuild on Truck now will swap onto the 3.4.
Get going rebuilding & making truck run better, in the short term for the long run.
Declare BK
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Old Sep 26, 2002 | 11:12 AM
  #15  
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Na, I save up, and keep looking. It will happen. I would love to score a 3.4l for 2 bills . That one on ebay is 210. But I have to drive to miami to get it, and I dont have that kinda time . Pooie.

I feel like santa clause. I'm making a list, checking it twice, but instead of finding out whos nautie and nice, Im finding out what has to be modded, and direct swap.

O, sounds like so much fun. I will need a new solder gun for this swap, and a engine puller, since I don't deal with the guy I use to borrow it from before.
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