steves

There is a camaro I'm interested in getting. What are some cheap basic mods to an LG4 I can do? Car seems original its a 5 speed not sure what gear it has. I was talking with someone and they said an exhaust from a TPI would help. Any other mods that are cheap?

85FBTranam

iTrader: (3)

Intake manifold, hedders, exhaust, better flowing air filter/intake. Everything plays off other parts...no one part is going to solve it for you.

8t2 z-chev

This is what i did to wake up the original LG4 in my
'82 z28"back in the day"-early '90s
-headers,y-pipe,3"super single exhaust
-hotter cam-(LG4 cam super mild,used one close to
"L69"specs)
-rejetted the carb to compensate for the cam and
exhaust uprades
-air cleaner and hood modified for functional
air induction
-had to add electric fuel pump as original mechanical
pumps(tried replacements)would not keep the carb
bowl full.

Toyota h8r

Save up and build a mild 350 and just swap them.

The end of the day you will still have low output lg4.....and only 50hp more.

Mild 350 with vortec heads and lt4 hotcam will run great and cheap

MustangEater82

iTrader: (1)

My minor research and conclusions are.,

-exhaust/headers, not lg4 diameter, 3 in.
-hotter cam
-i am going to try electric fan

I am considering the 1st and 3rd one and build an engine.

paul_huryk

What you want to do is eliminate all the restrictions on the exhaust, intake, and timing curve to get all the power back that GM intentionally choked out:

Headers, 3" cat, 3" cat back (if not headers then a 3" y-pipe)

L69 dual snorkel air cleaner assembly

Electric fans (if it has a clutch fan)

Underdrive pulleys

Edelbrock micro-plus (to give you the proper timing curve)

Edelbrock performer EGR intake manifold

Carb tuning to get a/f ratio correct

chazman

iTrader: (4)

You know what I would do, Stevie. TPI exhaust, N10 even better, HO air cleaner, bump the timing, re-jet the carb and drive the poop out of it!

MustangEater82

iTrader: (1)

Any more details on the edelbrock micro-plus (what does it do, what is it controling)

Also anyone source any cheap dual snorkel cleaners quick searches show $75-150

JamesC

iTrader: (5)

Here's what I did long ago:

L69 dual snorkel with ducts/scoops
L69 exhaust manifolds, Y- and intermediate pipe--along with a high-flow cat
CK or DR secondary metering rods and B hanger
Air-valve tension tweak
Edelbrock intake
Summit cam
advanced timing

The car ran much better than its original 155 hp, but after swapping in a 350 HO Deluxe, I learned that the LG4 effort, while a valuable learning experience, was somewhat a waste of energy/money.

JamesC

MustangEater82

iTrader: (1)

My plans are to try and do dual purpose nods, something that could be done on bother engines.

steves

I found a replacement N10 exhaust on ebay some used SLP headers and I think I would like to build an 2OTL exhaust. Probably gonna end up costing what half the car costs. But it would be exactly what I want. Just gotta work on the wife a little bit more and Im gonna call the guy. If it was an LB9 5 speed I'd just ask for forgivness LOL.

chazman

iTrader: (4)

It sure would sound good.....

SDTransAM

iTrader: (5)

I did an open element filter, Hooker Headers with cat-delete y-pipe, with a 3" Magnaflow exhaust. B&M Ripper shifter, and I really enjoy driving this car. Suspension mods made it a bit funner also. It's not super fast, but no slouch in my books.

steves

This along the line of what im looking for......It's an original car from what I can tell. Don't need it to be fast just looking to make it a little more fun. I would like to keep it as factory looking as possible any mods would be like either getting some vintage SLP stuff or finding stuff from newer cars to add to it like and H.O. air cleaner. Im looking for a cheap fun car to have. An LG4 will never be fast. If I can get it to run in the 14's I will be more than satisfied.

JamesC

iTrader: (5)

I went from 155 hp, to around 200 (I'm guessing) to 330. I wasn't aware that the first two were slouches until the first time I put my foot in the 330--then the stupid grin didn't leave my face for a week. Just sayin'....

Best of luck with the projects you fellows have going.

JamesC

five7kid

iTrader: (14)

Really no need to reinvent the wheel:
https://www.thirdgen.org/forums/faq-...5-engines.html

"FAQ is your friend."

paul_huryk

Edelbrock micro-plus was a piggyback computer made in the late 80's to early 90's to bump up the timing in the LG4 motors. GM used retarded timing on the LG4 cars to limit power output. I bought one new in 1989 and picked up 20hp nothing else changed. Probably a tough find now.

steves

Been doing some research. This is what I came up with headers, full 3" exhaust, dual snorkle air cleaner, carb tuning and maybe a cam. I think that would put me where I wanna be. The car i'm looking at is an 86 so those mods should put me at about what a big cam LB9 is at. I would like for it to be in the 14's this will be more of a fun cruiser. If I do that stuff should I even bother messing with the computer??


Found this too.

Message flagged
Friday, May 4, 2012 12:55 PM
http://www.fl-thirdgen.org/325-305sbcbuildup.html

SDTransAM

iTrader: (5)

If you are really wanting performance of any sort. Put a traditional Carb and an HEI mechanical advance distributor on. Ditch the computer entirely.

paul_huryk

Just doing a cam alone is a waste, unless you have a flat lobe or a couple of bum lifters or something like that.

But if you were to go the route you are looking into, with the right tuning and gears, the car might dip into the high 14s without anything but replacing the stock restrictive parts.

paul_huryk

In theory that makes sense, but as I have found out, most people do not have the patience to tune such a setup correctly and get all the performance an engine can give. Hence the multitude of 275hp, 14 second cars that might be putting out 375hp if everything was on the money.

five7kid

iTrader: (14)

Baloney. The computer carb is more than capable to put a fun cruiser 3rd gen in the 14's.

84Camarodriver

i keep hearing "remove all the restrictive parts" but what all are they?,

chazman

iTrader: (4)

On an LG4, exhaust is the biggest one, by far.

JamesC

iTrader: (5)

If you wish to see how restrictive the LG4 can be, note the comparison of Y pipes in post #7 of the following link (the exhaust manifolds and intermediate pipe are also dinky):

https://www.thirdgen.org/forums/exha...-question.html

JamesC