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3800 V6 L67 Turbo


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#1 pagemo

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Posted 17 February 2011 - 10:55 AM

Well I stumbled on my next motor while getting parts to fix my sons car. I bought a 99 Buick regal GS with the 3800 SC motor (l67) with 90K miles(very clean!) I have been doing some research and it appears I can use a R154,AX15, W58 or T5 behind this motor depending on the bell housing I select. I will use the Flywheel and clutch from a 97-03 F-body camaro, If I stay Supercharged I will have to cut off the back of the SC and weld on a  elbow and remount the throttle body so that it clears the firewall.   A single or even Twin turbos would be easier to make power so I am leaning toward ditching the SC and making a sheet metal intake. These V6’s are very strong and stock bottom ends have held well over 400Hp. I plan to add ARP fasteners and the 2005 up model  rods($250 a set) which should make it safe to 500 or so.
This is going in the gullwing Project and I think I can do the swap fairly inexpensive and even keeping the stock GM computer and MAS to start. I will post details and pictures as I go.



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I should have it out of the doner car this weekend...But i have to swap transmissions in my sons car before i can start fitting it in the conquest.

Edited by pagemo, 27 December 2011 - 08:38 PM.

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89 Conquest,undergoing a complete rebuild, new suspension,color change and Gullwing doors!
89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#2 LEPORE

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Posted 17 February 2011 - 11:05 AM

i was looking into the same swap...lol

#3 pure_insanity

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Posted 17 February 2011 - 11:15 AM

how similar is this motor to the original gnx motor?  is it even the sdame or just a later model/version of the same motor.  i may be thinking wrong here but it seems to me like this motor has the plastic intake, if so go ahead and give it a new set of intake gaskets.  i think this was in the early years of dex cool when it was eating up the intake gaskets.  not hard to do and not much money either.  whole lots easier to do with the motor out of the car.
  otherwise, i think its a pretty cool swap.  glad to see your getting back to the gullwing car.
some good mpi info that may help someone.
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#4 BOHO

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Posted 17 February 2011 - 12:07 PM

Good luck scott...Hope to see you in May.
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#5 ColdScrip

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Posted 17 February 2011 - 12:56 PM

My first car and i still have it is a 3800 V6 L67 series 1 SSEi bonneville. Fun car. Always wondered what it would do in a quest.
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#6 pagemo

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Posted 17 February 2011 - 01:04 PM

View Postpure_insanity, on 17 February 2011 - 11:15 AM, said:

how similar is this motor to the original gnx motor?  is it even the sdame or just a later model/version of the same motor.  i may be thinking wrong here but it seems to me like this motor has the plastic intake, if so go ahead and give it a new set of intake gaskets.  i think this was in the early years of dex cool when it was eating up the intake gaskets.  not hard to do and not much money either.  whole lots easier to do with the motor out of the car.
  otherwise, i think its a pretty cool swap.  glad to see your getting back to the gullwing car.

Its actually not the same as the GN motor at all, the good news is that its the next generation and actually been improved in several areas.
From Wiki:
L67 Supercharged
A 3800 Series II L67 Supercharged engine in a 1998 Buick Regal GS.The L67 is the supercharged version of the Series II L36 and appeared in 1996, one year after the normally-aspirated version. It uses the Eaton Generation III M90 supercharger with a 3.8" pulley, a different throttle body, fuel injectors, cylinder heads, and lower intake manifold than the L36 uses. Both engines share the same engine blocks, but compression is reduced from 9.4:1 in the L36 to 8.5:1 for the L67. Power is up to 240 hp (180 kW) and 280 lb·ft (380 N·m) of torque. Final drive ratios are reduced in most applications, for better fuel economy and more use of the engine's torque in the low range. The engine was built in Flint, Michigan. The engine was certified LEV in 2001.

This engine is or was used in the following cars:

1996–2005 Buick Park Avenue Ultra
1997.5–2004 Buick Regal GS / GSX (SLP)
1996–1999 Buick Riviera (optional 1996-97, std. 1998-99)
2004–2005 Chevrolet Impala SS
2004–2005 Chevrolet Monte Carlo SS Supercharged/Intimidator SS
1996–1999 Oldsmobile Eighty-Eight LSS (limited)
1996–2003 Pontiac Bonneville SSEi
1997–2003 Pontiac Grand Prix GTP

The NA version uses the plastic mainfold, This one has a aluminum lower plenum that the SC mounts to, Also the heads are slightly different and the injector boss is in the head. So to make a Turbo Version A sheet metal intake is all thats required.
But since you mention it i may swap the intake gasket on my sons while the motor is out!
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#7 jinx

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Posted 24 February 2011 - 08:29 AM

Quote

I have been doing some research and it appears I can use a R154,AX15, W58 or T5 behind this motor depending on the bell housing I select. I will use the Flywheel and clutch from a 97-03 F-body camaro,
is this the bellhousing from the aussies ?
why not use the f-body 5speed also ?

we have a corolla clubmember in orlando with a supercharged 3800/5 spd, powered 1974 corolla.

got some pictures on my cpu of a 3800 powered starquest, from austarion

yeah, 3800 is better than the older gn 3.8.

I would still like to build a "hot rod" using the 3800. I'm not counting my buick v6 days over just yet.... as I got my eye on a clean 2 door chevy chevette sittin in a friends garage.
I told him "you know you really not ever gonna do anything with that chevette - stop kiddin yourself. Call me whenever you're ready".
I'll build a nice turbo 3800 5 speed, with some deep 18s out back.... slammed, glass paint job, etc.... ac too :)

#8 nomad

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Posted 24 February 2011 - 11:44 AM

cool swap plan.
Ive dealt with place before and there is some good info here also. The L76 can make some real impressive power.
http://www.zzperformance.com/

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#9 Frenchi934

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Posted 24 February 2011 - 05:46 PM

Looked into this swap for my car based on low cost and large availability of parts but decided against it because of weight issues.
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#10 pagemo

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Posted 25 February 2011 - 09:03 PM

View PostFrenchi934, on 24 February 2011 - 05:46 PM, said:

Looked into this swap for my car based on low cost and large availability of parts but decided against it because of weight issues.
What was the issue? As far as I remember our g54b with turbo and manifold weight close to 450lbs the 3800 with Accessories and sc is 475. I would love to swap a set of aluminum heads on but it kind of kills the low cost swap theme for a 35lb savings. Besides I think by the time I dump the SC and build a aluminum sheet metal intake drop all of the unnessary brackets I should be able to match the stock weight?
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#11 pagemo

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Posted 26 February 2011 - 08:58 AM

View Postjinx, on 24 February 2011 - 08:29 AM, said:

is this the bellhousing from the aussies ?
why not use the f-body 5speed also ?

we have a corolla clubmember in orlando with a supercharged 3800/5 spd, powered 1974 corolla.

got some pictures on my cpu of a 3800 powered starquest, from austarion

yeah, 3800 is better than the older gn 3.8.

I would still like to build a "hot rod" using the 3800. I'm not counting my buick v6 days over just yet.... as I got my eye on a clean 2 door chevy chevette sittin in a friends garage.
I told him "you know you really not ever gonna do anything with that chevette - stop kiddin yourself. Call me whenever you're ready".
I'll build a nice turbo 3800 5 speed, with some deep 18s out back.... slammed, glass paint job, etc.... ac too :)


It depends on the transmission I pick. I am leaning towards the T5 since it can be built to handle 550ftlbs. The stock f body t 5 is very weak. It was rated at like 245ftlbs and the bell housing is tilted so that the stick leans toward the driver. I would use a bellfrom a 93 s-10. And a T5 from a early 90's mustang

The chevette would be a sweet project :)
If you can I would love to see the pictures of the 3800 swaped station.
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#12 jinx

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Posted 28 February 2011 - 08:06 AM

these probably 6 to 7 years ago
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3800 plucked from holdens is a popular oz/nz corolla swap choice too.... especially for their freestyle burnout competitions. Impressive videos on youtube of the l'il V6 liten em up for days

#13 socjdqcer

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Posted 13 April 2011 - 09:18 AM

I build a GTP that a drag raced and i bought EVERYTHING from ZZP! they are the best, when it was all said and done my GTP ran 12 seconds flat and it had potential for so much more! I built the motor myself, so if you have any questions let me know.  I actually was trying to sell my conquest to get a FIERO.  Guys do the L67 swap in FIEROs a lot and they are crazy fast cuz they are so light!  However i couldnt find a fiero body i liked, so i decided to do the Quest.  Good Luck!

#14 pagemo

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Posted 06 November 2011 - 06:11 PM

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The motor is mounted and I went with a TKO 600, it rated to 600ftlbs. Im using a spec 3+ clutch good for close to 500 ftlbs to start.
I haven't decided yet if I should use the forged motor,stage 3 cam,billet roller rockers and all or just stay with the factory motor I have mounted until its tuned to start and run?
Anyway here's some pictures.
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#15 BOHO

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Posted 06 November 2011 - 06:16 PM

Nice work Scott.
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#16 pagemo

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Posted 06 November 2011 - 07:07 PM

Thanks boho! Hope that 1jzI is running good for you. I am just trying to make sure this car gets completed soon. I have a ton of money on parts in the last few weeks now I just need some serious labor to get it on the road.
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#17 Dred_85.5_TSI

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Posted 06 November 2011 - 07:27 PM

Which TKO 600 bell housing bolt pattern did you use to fit the 3800?
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#18 pagemo

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Posted 07 November 2011 - 07:05 AM

View PostDred_85.5_TSI, on 06 November 2011 - 07:27 PM, said:

Which TKO 600 bell housing bolt pattern did you use to fit the 3800?
I am using a bell from a 94 s10 with a T5, I will have to add the 4th bolt hole that sticks out out on the TKO but that's it as far as I know. The trans should be here tomorrow so I will have a better idea then. I know several of the f body camaro crowd are doing the same.
Pictures when I get it ready to install. Not sure how it will fit in the trans tunnel either.
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89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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#19 BOHO

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Posted 07 November 2011 - 08:58 AM

Have you decided on if your going twin or single yet?.
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#20 pagemo

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Posted 07 November 2011 - 07:32 PM

View PostBOHO, on 07 November 2011 - 08:58 AM, said:

Have you decided on if your going twin or single yet?.
Yeah...im kind of sad to say i am going single large turbo. Main reason is cost and complexity. I have to just get it completed and on the road maybe one day in the future i can take the time to twin turbo it??
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89 Conquest,undergoing a complete rebuild, new suspension,color change and Gullwing doors!
89 Yellow conquest MPI 365WHP@20psi, everything new or rebuilt    SOLD!!
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