LG3-3 HO HO - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 03-17-2004, 09:53 PM   #21
Senior Member
Posts like a Camaro
 
padgett's Avatar
 
Join Date: Jul 2003
Location: Orlando, Florida
Posts: 872
Thanks: 0
Thanked 0 Times in 0 Posts
padgett is on a distinguished road
Default

Personal opinion - no balance shafts and do not think they had roller lifters. The whole 3800/4spdO/D combo has just gotten better every year and still is around (what is a 3.9 ?). Currently have 3 - 88, 90, & 92 (and an 88 power module on a pallet)
padgett is offline   Reply With Quote
Old 03-18-2004, 02:06 AM   #22
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Apr 2003
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Steve LS is on a distinguished road
Default

Balance shaft is said to be a idle thing. I dont know it may help across the whole range. 60* V6 guys said 60* is naturally balanced for V6 anyhow and 90* V6 is folish design. We know Buick developed it by building it on assembly line with 225 &300 ci 90* V8'*. That was the basics of the old odd fire engine. When they bought the rights back they quickly changed to even fire but stayed with 90*. Well its worked out good anyhow.

Do you really think roller lifters are that big of a deal ? Im just not sure. It seems like they are a everylast fraction kind of performance gain. Im sure they are way better for durability.

My 86 3 litre with all its then modern electrical tec & 9.5:1 got 125 HP. My 1964 1725cc(when their that small every cc counts) Alpine engine was 100 hp (stock)with solid flat lifters, rocker shafts and nothing special in the "tech" department. 9.3:1 compression in Aluminum heads and factory tuned exhaust. 4 into 2 into 1.

On another note they both got nearly the same gas milage, but by then my engine was worked up to 140-150 range. It was strong but the cars weigh was 2330.
Steve LS is offline   Reply With Quote
Old 03-18-2004, 02:27 AM   #23
Executed
 
Join Date: Jun 2002
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
MikeDiaz is on a distinguished road
Default

Quote:
Originally Posted by padgett
Needs the TV cable adjusted ?
I once did go on a venture searchign aroudn the net for info to fix my tranny issue we (were) discussing. And i did glance over a "tv cable" thing.

What is the TV cable? Doing a quick search i see it'* the "Throttle Valve cable" which must mean it'* the 'other' braided steel cable that is hooked on to the throttle body on my car (the other 2 being the accelerator pedal'* and then the cruise control'* cables).

So anyone know how to adjust this? Any ideas? I also read that having it maladjusted can cause SERIOUS problems so I'd like to go into this knowing ahead wha ti 'm getting into

Throw whatever you got at me

Mike Diaz
'87 Bonneville:
Bonne Stock + home-brewed Intake / K&N Filter
MikeDiaz is offline   Reply With Quote
Old 03-18-2004, 02:34 AM   #24
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

On my 92, the cable is clipped to a flange that has a handful of mounting points for adjusting the cable. If it'* too tight, your throttle won't close.
J Wikoff is offline   Reply With Quote
Old 03-18-2004, 07:17 PM   #25
Senior Member
Posts like a Camaro
 
padgett's Avatar
 
Join Date: Jul 2003
Location: Orlando, Florida
Posts: 872
Thanks: 0
Thanked 0 Times in 0 Posts
padgett is on a distinguished road
Default

With 85,000 on the clock, my wife decided to visit family in Indiana. Was right at the zero degree mark. One day she called me to say that the oil light was coming on at idle. Flew up with a new sender but same-same. Took to dealer and after a full day said was nothing wrong and the guage was off.

Drove home at Interstate speeds with a stop at Gatlinberg (was nice befre Dollyland). Put real gage on at home. 19 psi max & zilch at idle. Found the center cam bearings in somewhat mangled condition in bottom of pan. Never missed a beat. I like roller lifters.
padgett is offline   Reply With Quote
Old 03-18-2004, 09:06 PM   #26
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Apr 2003
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Steve LS is on a distinguished road
Default

Now this was a LN3-C ? Wonder why cam bearing went ? Wonder why dealer "techs" wanted you to ruin your engine ? You dont need to answer that one

I remember the old 60'* & 70'* Chevys had flat camshafts and shot lifters at 90,000 miles. Until mid 70'* Buick and Olds used much higher quality casting. Not sure about Pontiac. Must be rollers were the way around this expensive casting to get the endurance. Good idea.
Steve LS is offline   Reply With Quote
Old 03-19-2004, 01:03 PM   #27
Senior Member
Posts like a Camaro
 
padgett's Avatar
 
Join Date: Jul 2003
Location: Orlando, Florida
Posts: 872
Thanks: 0
Thanked 0 Times in 0 Posts
padgett is on a distinguished road
Default

Have heard of one other like instance on a '90 3800. Key seems to be a very cold start (before that trip car had been garaged in Florida and never experienced a real cold start).

I wrote to the dealer in Indiana with a copy of their report but never received a reply. Still have the block but at the time there were no oversized cam bearings available & would not trust stock ones after the originals spun, are there oversized ones avalable now ? Everything else showed no wear.
padgett is offline   Reply With Quote
Old 03-21-2004, 02:55 PM   #28
Senior Member
True Car Nut
 
Join Date: Dec 2002
Location: Halifax, Canada 91SSE / 97SSEi
Posts: 5,857
Thanks: 0
Thanked 0 Times in 0 Posts
Merlin 91/97 is on a distinguished road
Default

Quote:
Originally Posted by jr's3800
I have heard of carbed versions doing 200-205 hp easy and doing 280 ft lbs of torque... But that I think was a mils cam ment for torque....

But I would like to know more about that LG3 build up... It will be interesting for all of us...
Did we ever find out how he got 250hp from the LG3? Didn't that stock only output 150hp?

I've got an LN3 in my 91, stock output 165hp, very curious if I can do similar stuff to it. A 100hp gain out of mine would be SOOO SWEET!
Merlin 91/97 is offline   Reply With Quote
Old 03-22-2004, 12:44 AM   #29
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Apr 2003
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Steve LS is on a distinguished road
Default

Merlin heres the only detailed LN3-C build I know of. Lots of reading, grab a cup of coffee. Im 86 2dr.ltd Steve on this forum and BCA without theSteve. LoType is the guy with the LG3-3 build

http://www.lesabret.com/phpBB/viewtopic.php?t=2663

Im a little sceptical about the 250 on that LG3-3 engine but I do have my fingers crossed. He still wants to find some rockers, injector and TB work, plus rear header. Maybe then but I think more compression would be needed. 10:1 or 10.5:1. Im just going by the L36 that only came up at 205. Frankly I think you would need 12.5:1 and race fuel to make 250 NA out of 231ci.
Steve LS is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
lg3-3 and hi-low fan(s) projectheavytouring Performance, Brainstorming & Tuning 0 08-18-2004 10:20 AM
LG3-3 on nitrous? projectheavytouring Performance, Brainstorming & Tuning 3 08-14-2004 04:00 AM
turbo LG3???? projectheavytouring Performance, Brainstorming & Tuning 7 03-19-2004 11:46 PM
WOOHOO!!! I'm an LG3 now!!!!! OLBlueEyesBonne Lounge 11 09-23-2003 02:10 PM
what is a LG3? CraZyDriVer868 General GM Chat 4 07-10-2003 03:10 AM


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 02:56 AM.


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.