TimRS

Did GM make an L69 305HO in 1987 for the Z-28? What was the L69's last year of production? Anyone know??

Tim

cs2000

1986 was the last year, and very limited, only 74 were built , as you might already know, the H.O. came out mid year in '83, only with a 5-speed trans, in '84 automatics were optional, in '85 the 5-speed was the only choice again, and was only available with the IROC-Z package, '86 was to be 5-speed only too, now for the Z28 or the IROC-Z package. it would be interesting to know if any of the 74 H.O. '86's survived, or if they were sold to the public at all. Chris, '87 Conv. 1 of 263

TimRS

Does anyone know what the base engine was for a '87 Z-28? LG4 I'm guessin', but what HP rating?

Tim

cs2000

The base engine for the Z28 was the LG4 in 1987, it was rated at 170 h.p, while the same engine in the sport coupe is 165, I still trying to figure out what the difference was, my LG4 '87 convertible uses the same engine code " SDB" as my friends '87 Z28. Chris

[This message has been edited by cs2000 (edited December 16, 2000).]

TimRS

Thanks Chris. I'm looking at buying a '87 and the guy says its a 305HO but all of my research shows the '87s came LG4 305's or TPI 305's or 350's. Have you tried to mod yours with any luck?

Tim

cs2000

the only mod I've done to mine is put a dyno-max exhaust on it. Mine is only a fair weather cruiser, the LG4 is a good cruiser, with plenty of power for cruising around town or the Interstate, but it's no drag racer. check the VIN of the car your looking at , the eighth digit is the engine code, H=305-4bbl LG4, F=5.0 tpi, 8= 350. Chris

TimRS

I've got a 91 RS with a LO3 now. It's rated @ 170 HP but I'm itchin' for more..MUCH MORE!! Sounds like a good base to start from though.

Tim

cs2000

I had a 1991 RS LO3-5-speed I bought new. nice car, mine was teal with gray leather, it was ordered with every factory option you could get in 1991, including a engine block heater and rear louvers ( that the factory forgot to put on !) tell me more about your '91. Chris

Willie

iTrader: (1)

Chris,

To the best of my knowledge, all 74 1986 305 L69 Camaros were all Z28's without the IROC-Z option. I do not know if they were officially sold to the public, BUT I did physically see one on sale by a private party in Phoenix many years ago. It was a 5-speed car.

I have also read several reference books that state the H.O. option was available in 1987. I must also state that I have read many other inaccuracies within these books, so I discount them as unreliable. Have you ever heard of a 1987 1LE? One book states they were produced. HA!!!

Willie

[This message has been edited by Willie (edited December 16, 2000).]

TimRS

My RS is a Black '91 with grey standard interior. The only major options I got were 16 in. wheels/tires and A/C (college student at the time I bought it new). I have a Flowmaster muffler, ADS superchip, K&N filter, Bosch platinum plugs, and a 165 degree thermostat. I still get about 20-22 mpg back and forth to work. That's about the only time I drive it.

Tim

cs2000

Willie, are you sure about the '86 L69 being available on the Z28 only?, I found info that shows the L69 was available in both the IROC and the Z28. I also have a dealer order form dated 12-02-85 that excludes the L69 alltogether. the info I have written down shows that 2 different 5-speeds were used, the MC4, and the M39. axle ratios were 3.23 with the M39, and 3.73 with the MC4 Chevrolet also required the P235/60vr-15, RPO QAC,larger than the standard Z28 tires. Chris

Petes 84Z28

The LG4 can be made to work fairly decently...see my sig...

Pete

------------------
Pete's Place
HiOutput <a href="http://www.hioutput.com/rpmworld.html">Virtual Racing Team</a>

<IMG SRC="http://www.hioutput.com/pics/SC.gif" TITLE="Pete's 83 SC">
My 83 SC...(originally V6) 203,000 mile LG4/5-speed from an 84 Z28, 3.42 one-tire-fryer, T-tops, PW, PH, boxed LCA's, Hedman Hedders and y-pipe, Dynomax cat-back, .420" lift cam, custom air induction .....best ET is 14.935@94.14</P>

Jason E

What WAS the deal with the 235/60/VR15 tires on the Z28s? When did that start? I have conflicting information on those, and until now I thought they may have been a typo in the books I have!

Were they only supposed to be for L69 '86s or something? I've never seen a Z28 with this size tire...all the ones I have seen had the 215/65/15s.

cs2000

Chevrolet records show on 4 sets were put on 1985 cars. These cars I am guessing were probably pre-production '86's. it's interesting how many mysteries about 3rd generation cars are out there. Chris

David M

Chris, The '86 L69 cars were all IROC's. I'm 99% sure about this. But knowing how GM is there could be exceptions. I have never seen an L69 engine in a 1985 or'86 Z28. The 74 L69 cars should have been all IROC optioned Camaros for the Canadian Players Challenge Series. They were all Z49 (mandantory Canadian base equipment) optioned cars with no A/C and no t-tops. All these cars were built at the Norwood plant. I am getting all this info from a Camaro/Firebird Performance magazine dated spring 1987. In my opinion these were the first 1LE cars or maybe a start-up of the 1LE program. I have seen one of these cars for sale. It is a documented race car from the Canadian series.

Z's r Best

I keep reading that the 83 Z28's with the HO 305 (L69, VIN code 7) only came with 5 spds. but ours has a 700R4 and all the computer, electrical and emissions stuff still works so it's hard to believe someone took out a 5 spd. and did all the wiring and computer chip work to put a 700 R4 in.

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Z's r Best

Willie

iTrader: (1)

David,

As I mentioned in a previous post above, I have physically seen a 1986 L69 Z28. I confirmed this through the VIN (year and engine). It did NOT have the IROC-Z option. It was white with silver ground effects and multi-colored silver Z28 striping.

I also have two references on this subject. The first is the "Camaro Buyers Guide". It states, "The RPO L69 High Output V-8 was also listed as an available option for Z28 models, but it too was generally unavailable, though records do show 74 were sold in 1986 Camaros." The second is the GM 1986 Camaro sales brochure. It shows in the Power Teams spreadsheet that the L69 was available (as "interim availability") on the Z28 with and without the IROC-Z option, but with 5-speed manual transmission only.


Chris,

The four Z28's you mention with the optional P235-60VR/15 tires were not in 1985, but 1986. The White Book confirms this. I came ever so close to ordering an '86 Z28 with this option, but didn't.

Willie

[This message has been edited by Willie (edited December 25, 2000).]

cs2000

Willie, your correct about the quanity of 4 tires from 1986 instead of '85 as I wrote. sorry for the mis-information. Chris

zee28

I think the HP rating depends on the book or manual your looking at.I have seen horsepower numbers between 150-170 for the LG4.I think we all tend to lean toward the higher #s.I think the GM ratings for the 86-87 LG4 were closer to the 150 mark.Who knows which one is right. I also wonder how many L69 cars got LG4 motors and the oppisite?


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~mike~
1 superclean 86IROC-Z

Jason E

I've seen them 145-165, never up as far as 170. I've only seen 305 TBIs rated at 170.

cs2000

The LG4 H.P. ratings are as follows, 1982-145 h.p, 1983-1984 150h.p.,1985 155 h.p. 1986-155h.p.except Z28 and IROC's, 165 h.p for Z28's and IROC's,1987- 165 h.p exc. Z28's and IROC's, 170 h.p. for Z28's and IROC's, these figures are from official Chevrolet publications and the M.V.M.A. specification forms. Chris