MY84CAMARO06

HOW GOOD IS THE 305 H.O ENGINE?THE MAN I BOUGHT IT FROM BOUGHT IT OFF THE SHOWROOM IN 1984 AND THEN HE SOLD IT TO ME..ITS IN MINT CONDITION..I JUST WANT TO KNOW WHAT I CAN DO TO GAIN A FEW HORSES?

THANKS DEVAN

Sonix

iTrader: (1)

LOTS. THAT WOULD BE THE L69. CHECK THE MAIN PAGE OF TGO TO SEE THE STOCK HP RATINGS.
PUTTING ON HEADERS AND A GOOD FREE FLOWING EXHAUST REALLY WAKES UP THE MOTOR, WE'RE TALKING 40HP EASY, NOT AN EXAGGERATION. A CAM WOULD ALSO HELP IT LOADS, ALONG WITH A DUAL SNORKLE AIR INTAKE. CHECK THE FAQ FORUM FOR MORE INFO ON BOOSTING POWER IN LG4/L69 MOTORS.



LOTTA PEOPLE GOING FOR THE ALL CAPS LATELY, IS A BUG GOING AROUND?

MY84CAMARO06

it says 190..l69 is the code? if so its 190 hp..i got full exhaust.whats a good cam cost?.im new to the muscle world..i usually only drove hondas.

thanks devan
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(3o5 h.o z28 iroc) is my engine

Sonix

iTrader: (1)

shouldn't be an IROC if it's the stock 1984 engine.

full exhaust? headers, y-pipe and muffler ? ok, good, well welcome to the muscle car world

a comp xe256 or xe262, with lifters, springs, retainers. New timing chain too. That'd work well. Lots of choices there tho.

mw66nova

iTrader: (13)

how fast do you really wanna go? there are plenty of things to do to that 305. if you've already got full exhaust, then the next thing is to work over the drivetrain. make use of all the engine has to offer by putting in a good torque converter, a set of 3.73 gears and posi. lca relocation brackets and subframe connectors.

once you've done that, consider a cam/head/intake/carb upgrade.

sofakingdom

iTrader: (1)

Being a L69 car, it already should have 3.73 gears.

There's no such thing as a 1984 IROC. That organization's initials are not associated with 84 Z28s in any way. Don't make that mistake, or people here will be sure to harass you endlessly about it.

It needs headers and exhaust; a good high-flow cat, with the 4-bolt hookup like it came stock; and a cam. For headers, go with a good quality set made specifically for that car, with the stock exhaust hookup; such as SLP or Edelbrock. Get them ceramic coated. Coating them will lower the underhood temp by at least 100 degrees.

The XE262 is the killer combo with the L69/T-5/3.73 drive train.

The intake and carb aren't holding that motor back. Replacing them is a waste of money. I wouldn't do that until you already have a motor with more cubes; and even then, they're probably not the bottleneck. The intake will be the weak link long before the carb.

Head porting can pay off BIG TIME. Good to do at the same time as the cam.

stroker_SS

350 - <----- you must be at least this tall to ride the world of muscle.
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305 -
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2.8 -

Had to do it.

Fast355

iTrader: (2)

mw66nova

iTrader: (13)

so...what's your car run again?

JamesC

iTrader: (5)

https://www.thirdgen.org/forums/faq-...5-engines.html

The L69 was a butt kicker in its day. You might see what it'll do before the modding bug drives you crazy.

JamesC

mw66nova

iTrader: (13)

i've seen/heard of l69 cars with full exhaust, 5spd and 3.73's with sticky tires running 13.9's with no other mods.

didn't realize his was a 5spd.

go run the car man, get use to it, and learn how to drive that thing like a bat outta hell!

84_Camaro

325 horsepower 305 cid Chevrolet V8
(Built with simple bolt on mods!)
This information is a brief summary of an article that appeared in the March 1999 issue of Car Craft magazine.
If you are seriously interested in this build-up, I suggest that you find a copy of that issue.
305 BUILD-UP PART 1.

Car Craft started out with an 80,000 mile (130,000km) 305 LG4 engine from a 1982 Camaro. They removed the engine from the Camaro and put it straight on the dyno with headers, 3" dual pipes to Flowmaster mufflers, and a HEI distributor with 22 deg total advance. This gave a baseline dyno result of:

197 HP @ 4,000 rpm. 261 ft/lb torque @ 3,100 rpm.

305 BUILD-UP PART 2.

Added an Edelbrock Performer EGR intake manifold, but with the EGR blocked off.

217 HP @ 4,200 rpm. 285 ft/lb torque @ 3,300 rpm.

This is an increase of 20 HP and 24 ft/lbs over stock.

305 BUILD-UP PART 3.

Replaced Edelbrock Performer EGR intake with an Edelbrock Victor Jr single plane intake manifold. Replaced Q-Jet carb with a 750 Holley double pumper.

217 HP @ 4,200 rpm. 285 ft/lb torque @ 3,300 rpm.

This resulted in no change from the previous mods, maintaining the increase of 20 HP and 24 ft/lbs over stock.

305 BUILD-UP PART 4.

Added Comp Cams XE262H-10 "Xtreme Energy" hydraulic flat tappet cam. 218/224 dur @ 0.050, .462/.469 lift, 110 deg LS. Set initial timing to 16 deg BTDC.

270 HP @ 5,100 rpm. 291 ft/lb torque @ 3,800 rpm.

The cam change resulted in a huge increase of 53 HP. Torque was up by 6 ft/lbs.

305 BUILD-UP PART 5.

Replaced stock cylinder heads with World Products 305 S/R Torquer heads.

298 HP @ 5,500 rpm. 308 ft/lb torque @ 3,900 rpm.

A 28 HP increase over the stock heads, and the 305 engine now has close to 300 HP.

305 BUILD-UP PART 6.

Replaced World Products 305 S/R Torquer heads with '96 - '97 Chevy truck L31 Vortec cast iron heads, GM P/N 12558060. These are available from GM dealers in the USA for US $408 a pair, fully assembled. The Vortec heads require a different intake manifold, and Car Craft chose an Edelbrock Super Victor. They kept the same Holley 750 DP. Car Craft says that these heads are a bolt on for conventional small block Chevy engines. If your engine is earlier than '87, you will also need a set of self aligning rocker arms, and a pair of "center-bolt" valve covers.

325 HP @ 5,800 rpm. 317 ft/lb torque @ 4,800 rpm.

TECH COMMENTS
With peak torque at 4,800 rpm, the 325 HP 305 would definitely need some stiff rear end gears (I'd suggest a minimum of 3.73 ratio) plus a high stall converter if the car had auto trans. In my opinion the WP Torquer heads are the better choice for a street engine. I think that a 300HP 305 with 308 ft/lbs at 3,900 rpm, would be a nice street / strip combination.

JamesC

iTrader: (5)

Before I swapped out my LG4, I modded so that it was, in most respects, the equivalent of the L69: cam, intake, rods and hanger, dual snorkel with ducts and scoops, an L69 exhaust to include manifolds, Y and intermediate pipe (along with a high-flow cat). By the way, the stock L69 intermediate pipe was larger than the after market catback I'd previously had. Anyway, long shory short, for an LG4, it was pretty quick. Like mw says, play with it.

JamesC

mw66nova

iTrader: (13)

car crafts buildup is about the most mis-matched set of parts i've seen yet.

the 305 will NEVER benefit from the super-victor intake. i'd imagine that with a GOOD dual plane intake (not the perfomer, it's JUNK) it would have done much better than they got. i'm running the holley street dominator dual plane intake with a power range from idle-7200 rpms. this same intake fed my 450hp 360 AND my fathers 550hp 355, so it works just fine for the 305.

i used a smaller cam then they did, a smaller carb, and a set of factory casting 416 heads and produced an estimated 348flywheel hp based on weight/et. based on weight and mph it was still 335flywheel hp

stroker_SS

HAHA it don't, sorry if i offended anyone over that it's just some friendly ribbing. BTW i respect your 305's times very much.

mw66nova

iTrader: (13)

i'm just givin' you a hard time back bro!

i'll have new times to post in a week!

one wheel peel

so how much $$$$$$$$ is all that? sounds like around ? heads
carb, headers, gears,intake,cam,carb .forget about it much more and you may as well get a NEW crate motor

manchesterbeast

I got a good laugh outa that.
Im one of many who swaped out the stock 305 for a 350. mines an oldy but she runs pretty good.

Ive got my original 305 and i've been thinking alot about rebuilding. I was just wondering what the difference is between a regular 305 and a HO 305?

mw66nova

iTrader: (13)

cam, some small things on the carb, and compression (depending on year). 82-84 lg4's got 8.5:1 compression while the l69's got 9.5:1. from 85 up they all recieved the 9.5:1 pistons.
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heh, some people actually like to build there own power, rather than pay somebody else to build it for them.

but honestly, what is the goal here? to have a well running, efficient 305? or an all out go as fast as we can type deal?

if it's the latter and you'd like to stay small block, skip the 350 and go with a 400+ motor.

JamesC

iTrader: (5)

https://www.thirdgen.org/forums/faq-...5-engines.html

JamesC