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

V6 dream car

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Old Aug 7, 2004 | 11:09 AM
  #1  
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From: Calgary
Car: 89 Formula
Engine: 350
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V6 dream car

If you had the funds, what kid of build up would you do to your V6?

(I don't have a 3rd gen right now, had a bunch in the past, inc a 2.8L Camaro)

GM is coming out with some great V6 engines.

3.6L 255-260hp DOCH 24V V6 and a brand new 210hp 2.8L V6
(same HF engine family)

In a light weight Camaro (as opposed to a some what heavier Cadillac) these could really move.

Plus the 2.8L has a fuel shut off of 7200rpm! wee

I'd swap in a 2.8L behind a manual trans
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Old Aug 7, 2004 | 07:53 PM
  #2  
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From: UofA(Tucson), AZ
Car: 92 Precision Red Firebird
Engine: v6->357 vortec xe262h rpm intake
Transmission: t5-> t56
Axle/Gears: 10bolt 3.42s
the 3.6 would be nice! i wonder...would it bolt right in?? and if not u should see the 3.4DOHC motor...wow
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Old Aug 8, 2004 | 12:16 AM
  #3  
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Yep, turbo 3.6 Global 60º! DOHC!
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Old Aug 8, 2004 | 04:16 PM
  #4  
avro206's Avatar
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From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
Originally posted by 7plagues
the 3.6 would be nice! i wonder...would it bolt right in?? and if not u should see the 3.4DOHC motor...wow
Well the 3.4L DOHC was decnt for the day but its pretty old now. Also known as GMs most expensive V6, it can very very costly to own and maintain. Bothe the new 2.8L and the 3.6L would kill it

None of these would be bolt in but they do share the 60 degree configuration.
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Old Aug 8, 2004 | 06:52 PM
  #5  
Projek: 85 3800's Avatar
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From: Iraq
Car: 85 Firebird
Engine: 3800 Series II
Transmission: 4L60E
depends on how good you are in bolting in other engines
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Old Aug 8, 2004 | 09:58 PM
  #6  
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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)
hmmm, dreaming sense....completely built turbo DOHC 3.6 would be nice w/ 5 speed....maybe six? same time, in a more "realistic" light, a single turbo 2.8L , complete forged internals, being backed by a T-5, aluminum driveshaft, 4th gen rear w/ discs and some 3.73's. we'll make that a camaro convertible, flame red with black stripes, 4th gen camaro leather treatment done in black with slight red accents.....ah, but just for fun.
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Old Aug 8, 2004 | 11:20 PM
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From: Port Washington, WI
I have a '94 Grand Prix GTP with a 3.4L DOHC in it. I can vouch for the fact of it being GM's most expensive v6. $ for $ it's not even worth keeping in my current car let alone ever doing anything else with it! Plus there is absolutley NO aftermarket support for them. It's just not worth it.

Why not just swap in a v8? Say a nice 572rat or something?!
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Old Aug 9, 2004 | 12:37 AM
  #8  
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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)
for the style, the huge big block setup is great for second gen cars...and nicer for 1st gens. Thirdgens are sports coupes, can try to argue a muscle car , but really, sport coupes, and as a result, the need for a big block just isn't really the best way to make the car perform the way it was meant to....fast yet nimble.
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Old Aug 9, 2004 | 07:37 PM
  #9  
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From: Detroit,MI
Car: 1991 RS
Engine: LS1
Transmission: T56
I'd stick a Cadillac XLR drivetrain in a 3rd gen. V8 and 32 valves
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Old Aug 9, 2004 | 09:38 PM
  #10  
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From: Toronto
Car: 1991 Trans Am GTA
Engine: L98
Transmission: 700-R4 (what else)
I would take a 91-92 v6 Camaro RS as the project car.

With the new 2.8 and T-5, I would build a killer road racer. A near 50/50 weight distribution could be achieved. Other mods would be a built suspension with spohn goodies, big brakes (13" willwood kit would be nice), 4th gen rear with 3.73s added, 17" 4th gen wheels with eagle f1's.

The car would be hard to beat in the turns!!
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Old Aug 9, 2004 | 09:42 PM
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Car: a car being parted out
Engine: blown up
Transmission: in peices
The DOHC/turbo arguement...

Just as a referance...
An engine I am swapping is a 2.6 8V SOHC turbo.
I am replacing with a 2.0 DOHC turbo.

The 2.6 at 14 PSi puts roughly 220 Trq, but tops out at 6500-6800 Rpms, and the highest one I have seen in person was 480 Ft Lbs of Trq.

The 2.0 at 14 PSi puts out roughly 260, will top out over 9K Rpms, and again the highest one I have read about is deep into the 600 Ft Lb range.

Why? Flow.
The 2.6 head is a bottle neck, while the intake valves are 1.5" or so, the DOHC head has 2 1.3" thats over an 1" difference. That equates to ALOT more flow.

Yes you can have the best turbo set up in the world, but of your head cannot flow the numbers equally, and effiecently, it IS a bottleneck and kills the power potential.

If it were me, with unlimited funds...
3.8, custom DOHC heads (1.7 In, 1.3 Ex), twin T4(.60)/T3(.48) and a BUILT 4L60.

Light, VERY deadly, and would kill about every other street engine out there.
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Old Aug 9, 2004 | 10:17 PM
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From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
I would use a Al GMPP block bored to about 3L with a stock internal ballance 2.8 crank with Modded 6'' forged small jornal SBC rods, custom pistons and Al 3rd gen heads. Also custom Comp cam mechanical roller cam.
With turbos twin K04's, a 5 speed trans and posi 10 bolt 3.73 gears may be.
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Old Aug 9, 2004 | 11:31 PM
  #13  
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From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
Originally posted by V6sucker
The DOHC/turbo arguement...

Just as a referance...
An engine I am swapping is a 2.6 8V SOHC turbo.
I am replacing with a 2.0 DOHC turbo.

The 2.6 at 14 PSi puts roughly 220 Trq, but tops out at 6500-6800 Rpms, and the highest one I have seen in person was 480 Ft Lbs of Trq.

The 2.0 at 14 PSi puts out roughly 260, will top out over 9K Rpms, and again the highest one I have read about is deep into the 600 Ft Lb range.

Why? Flow.
The 2.6 head is a bottle neck, while the intake valves are 1.5" or so, the DOHC head has 2 1.3" thats over an 1" difference. That equates to ALOT more flow.

Yes you can have the best turbo set up in the world, but of your head cannot flow the numbers equally, and effiecently, it IS a bottleneck and kills the power potential.

If it were me, with unlimited funds...
3.8, custom DOHC heads (1.7 In, 1.3 Ex), twin T4(.60)/T3(.48) and a BUILT 4L60.

Light, VERY deadly, and would kill about every other street engine out there.

Yeah GM was looking at 3.8L DOHC HF V6 but I think they dropped the idea. You might have lots of problems getting such huge valves in the engine---unless it has a HUGE bore.

Certainly a 4 valve head can flow great numbers but a modern LS6 head is pretty damn impressive. I think the head design is very critical as well---not just the number of valves.

I think the Corvette ZR1 (LT5) had 1.3 intake valves. Most modern engines have good flowing heads.

Want to see some terrible heads? L03 TBI heads! The worst flowing heads Chevy has ever made!

Just one question---why would you want an automatic behind that engine? Takes out too much fun, IMO

Last edited by avro206; Aug 9, 2004 at 11:36 PM.
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Old Aug 9, 2004 | 11:44 PM
  #14  
V6sucker's Avatar
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Car: a car being parted out
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Originally posted by 871LEIroc


Just one question---why would you want an automatic behind that engine? Takes out too much fun, IMO
No boost lost between shifts...
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Old Aug 9, 2004 | 11:49 PM
  #15  
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From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
I would want a turbo with a stick, no other way for me.
A lot of times a high boost turbo moter with an auto is faster than if it had a standard IN THE 1/4 MILE.
Standard trans turbo moters a lot of times have insane top speeds.
I would take the 5 speed any day, but that's just me.
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Old Aug 10, 2004 | 10:21 AM
  #16  
V6sucker's Avatar
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Car: a car being parted out
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trust me I perfer manuals. I would take a manual over a stick almost any day of the week.
But I am also toying with the idea of having the 4L60E with paddle shifters. Auto/manual, no boost loss, any gear, any time, and no RPM lost between the shifts.

But history also shows, that Auto's behind turbos are much faster.
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Old Aug 10, 2004 | 06:15 PM
  #17  
avro206's Avatar
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From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
Originally posted by V6sucker
trust me I perfer manuals. I would take a manual over a stick almost any day of the week.
But I am also toying with the idea of having the 4L60E with paddle shifters. Auto/manual, no boost loss, any gear, any time, and no RPM lost between the shifts.

But history also shows, that Auto's behind turbos are much faster.

psst maybe you were just tired but a manual IS a stick

I am not so sure about the auto VS manual being faster in a turbo application. Sure teh boost falls off more in a manual but manual don't have the parsetic loo like automatics do. A TH400
loses close to 40hp

Posche 911 Turbo is faster with a manual and so would a Dodge Daytona/Spirit ect because they have 3 speed autos and 5 speed manuals. Becuse the 3 speed has no o/d the gears are really weak.

Perhaps there are some auto turbos that are faster......

any way neat ideas

Last edited by avro206; Aug 10, 2004 at 06:19 PM.
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Old Aug 10, 2004 | 08:14 PM
  #18  
V6sucker's Avatar
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Car: a car being parted out
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derr, I perfer manuals over AUTO'S!
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Old Aug 10, 2004 | 08:37 PM
  #19  
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Re: V6 dream car

Originally posted by 871LEIroc
If you had the funds, what kid of build up would you do to your V6?
I'd probably have mine dipped in 24k gold.
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Old Aug 10, 2004 | 10:26 PM
  #20  
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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)
beautiful Tom, purely beautiful.....

Didnt realize it said our v6 car, hmmm, if that was the case..i'd be pulling hte six and replacing it with the northstar right away, instead i'm waiting...what i said earlier was in respect to another v6 car i'd come in contact with.

Talked to my friend at the shop, he aggreed with dowards turbo kit, and thinks that we'll be building that dream car of mine as a shop project.
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