L27 to L36 swap? anyone? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-17-2006, 02:16 PM   #1
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Apr 2006
Location: maitland fl
Posts: 858
Thanks: 0
Thanked 0 Times in 0 Posts
Marik_bathory is on a distinguished road
Default L27 to L36 swap? anyone?

i've got a '95 transport which basicly has a '94 bonneville drivetrain in it. it'* an L27/4t60E combo thats got about 170K on it. the original play was to drop a S2 L-67 in and blow everything away with this monster sleeper. but i've decided instead to build an old monza drag car instead and use the van as a support vehicle. which of course means towing and the like.

i'd love to have that extra 35 horse the L36 provides, not to mention the torque for just tooling around town and definatly for towing.

has anyone ever done a 27 to 36 swap before. i figure the mounts should match up and my biggest problem would be the wiring. my plan here is to get the factory wiring harness from both cars and just compare them, eventually plicing them into a perfect adaptor harness. this will take me weeks.

i figure i might also have to swap axels, since i'd like to use whatever tranny comes with the L36.

anyone done this before?
Marik_bathory is offline   Reply With Quote
Old 05-17-2006, 04:18 PM   #2
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

No I have not done this before...

But after driving the LN3'* and L27'* I will say that the L36 does not have the Super strong low end grunt that the LN3 and L27 has... But the L36 does have a nice and stout 200 ft lbs at say 1500 rpms and a peak of 230 @ 4000 rpms, with 205 HP at 5200 Rpms... It does get to be a bit more fun above 3500 rpms...

But I do feel with a bit of an exahust, and intake, and some lower intake porting an L36 will be more than up to the challenge of towing and moving the Transport around.... The 3800 should have continued in the U body line through current... Thats just my thought..

Family member has a Montanna and wishes it had the same 3800 II L36 that his 95 Bonneville has...

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 05-17-2006, 05:20 PM   #3
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

jr's3800, his L27 has a 4T60E trans and many L36'* do also. are they the same bellhousing/mounting pattern or do you have to get the trans with the motor?
lash is offline   Reply With Quote
Old 05-17-2006, 05:29 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

It will bolt up, but some internal wiring changed from year to year. A good trans shop could convert it for another year.

Personally, I'm all for the direction jr's3800 was almost leaning in his reply. I think the L27 is better suited for towing than the L36. Simply because it delivers it'* peak power at a lower RPM.
willwren is offline   Reply With Quote
Old 05-17-2006, 05:46 PM   #5
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

What'* the peak torque for an L27?
J Wikoff is offline   Reply With Quote
Old 05-17-2006, 05:47 PM   #6
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

Quote:
Originally Posted by J Wikoff
What'* the peak torque for an L27?
225 Ft Lbs @ 3200 Rpms
1993 SLE is offline   Reply With Quote
Old 05-17-2006, 06:08 PM   #7
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

we need to keep in mind that the L27 has the Tall deck and the L36 has the short deck... But the way in which these motors produce their torque is diffrent...

My LN3 is instant torque.... Its amazing to see it strum along at 1400-1450 rpms going uphill and loose no speed in OD... The L27 is much the same in that respect but it got the aid of better breathability and a few changes that helped reduce friction even further... I would most likely stick with the L27 if you plan on towing 3000-4000 Lbs...

Yes everyone I know that amount of towing is not reccomended, But we all know the 3800 can do it... I would merely suggest a good trans cooler for towing..

Now if you want to drop in a lower milage L36 I'm all for that too... More top end power there... It would be interesting to see a Transport running around with the engine I think it should have had all along( especially 96 )


And being off the wall here...

I wonder if the 94 U body PCM wiring harness is the same, as the PCM for the 94-95 Bonnevilles are the same as the 94-95 U body van... An L36 may turn into an easy swap if the wiring is right and you can get your hands on an L36 EPROM for the PCM...

Does the 94-95 L27 have the double knock sensor set up?

and yes the 3800 II L36 will bolt right up to the present trans

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 05-17-2006, 08:29 PM   #8
Senior Member
True Car Nut
 
GAMEOVER's Avatar
 
Join Date: Aug 2003
Location: Racine Wi
Posts: 5,146
Thanks: 0
Thanked 0 Times in 0 Posts
GAMEOVER is on a distinguished road
Default Re: L27 to L36 swap? anyone?

Quote:
Originally Posted by Marik_bathory
i've got a '95 transport which basicly has a '94 bonneville drivetrain in it. it'* an L27/4t60E combo thats got about 170K on it. the original play was to drop a S2 L-67 in and blow everything away with this monster sleeper. but i've decided instead to build an old monza drag car instead and use the van as a support vehicle. which of course means towing and the like.

i'd love to have that extra 35 horse the L36 provides, not to mention the torque for just tooling around town and definatly for towing.

has anyone ever done a 27 to 36 swap before. i figure the mounts should match up and my biggest problem would be the wiring. my plan here is to get the factory wiring harness from both cars and just compare them, eventually plicing them into a perfect adaptor harness. this will take me weeks.

i figure i might also have to swap axels, since i'd like to use whatever tranny comes with the L36.

anyone done this before?
dont waste your time go with the L67 if anything
GAMEOVER is offline   Reply With Quote
Old 05-17-2006, 09:24 PM   #9
Senior Member
Posts like a Camaro
 
Join Date: Sep 2003
Location: Bad Axe,MI.
Posts: 1,025
Thanks: 0
Thanked 0 Times in 0 Posts
daman is on a distinguished road
Default

All i know is the L27 in my van hauls the mail,,plenty of Tq. i would't change a thing
about it........$.02
daman is offline   Reply With Quote
Old 05-17-2006, 09:41 PM   #10
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default Re: L27 to L36 swap? anyone?

Quote:
Originally Posted by GAMEOVER
Quote:
Originally Posted by Marik_bathory
i've got a '95 transport which basicly has a '94 bonneville drivetrain in it. it'* an L27/4t60E combo thats got about 170K on it. the original play was to drop a S2 L-67 in and blow everything away with this monster sleeper. but i've decided instead to build an old monza drag car instead and use the van as a support vehicle. which of course means towing and the like.

i'd love to have that extra 35 horse the L36 provides, not to mention the torque for just tooling around town and definatly for towing.

has anyone ever done a 27 to 36 swap before. i figure the mounts should match up and my biggest problem would be the wiring. my plan here is to get the factory wiring harness from both cars and just compare them, eventually plicing them into a perfect adaptor harness. this will take me weeks.

i figure i might also have to swap axels, since i'd like to use whatever tranny comes with the L36.

anyone done this before?
dont waste your time go with the L67 if anything
I second this accusation.


Even a 92/93 L67 has enough torque to go around plus it is at a super low peak
Hans is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
L27 w/L36 throttle body 91buickman Performance, Brainstorming & Tuning 8 06-27-2007 03:03 PM
L27 L36 Merrill'spontiac General GM Chat 15 06-08-2006 11:17 PM
L36 miles or L27 miles Steve LS Performance, Brainstorming & Tuning 26 01-04-2005 12:55 AM
Gatorback belt on a L27 or L36 OLBlueEyesBonne Performance, Brainstorming & Tuning 3 07-17-2003 11:26 PM
L27 or L36 Muslimsteel General GM Chat 16 06-10-2003 11:25 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:56 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.