I have an 86 sports coupe with a 345 9 bolt
l69 air cleaner flow master muffler no cat.
I know chips help the the injcted cars but
what about the carburated cars?

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83 berlinetta currently 350/350 3:42 gear,2500 stal,3inch exhaust,2 1/4
exhaust manifolds,comp cam 268,performer intake
L69 dual snorkle aircleaner 3160lb
86 sports coupe lg4 2:73 posi disc brake 3 inch exhaust with some kind of flow master(Dual tail pipes)ugly primered Z28 or iroc front bumper.

 

Timing curve, basically. The L69 chip has a good enough timing curve that I don't worry about it. It won't do much on a mostly stock motor either.

 

Thanks, Would it be worth getting an l69 chip,or the zz4?

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83 berlinetta currently 350/350 3:42 gear,2500 stal,3inch exhaust,2 1/4
exhaust manifolds,comp cam 268,performer intake
L69 dual snorkle aircleaner 3160lb
86 sports coupe lg4 3:45 9 bolt,flow master with factory looking 2 1/2 tail pipes,factory foglamps.

 

One of these days, I'm going to run mine as-is with the aftermarket chip, change back to the factory LG4 chip, and run it again for comparison.

The ZZ4 chip may be taylored somewhat for the larger displacement and higher compression. It may not be the best choice for an otherwise stock LG4.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

The 86 LG4 should already have a knock sensor and a more agressive timing curve compared to 82-84 (I misred the sig and thought you had an 83 LG4... my bad).

You could switch to the 85-ish L69 chip, but I'm not sure it would gain you anything.

I'm wary of suggesting the ZZ4 chip because I don't think it will run in the stock ECM; the conversion kit supplies a service replacement ECM for a reason I think. Also, the EGR is disabled in the ZZ4 chip. Since the ZZ4 has aluminum heads, higher compression, and premium pump gas, I would think the timing curve wouldn't be right for your car. You could always fill 'er up with premium and give it a shot, I suppose, but I wouldn't do it without a scan tool to watch the knock sensor.

 

Do you know for a fact that the chip in the ZZ4 conversion kit disables the EGR?

That same kit includes a tube that goes from the exhaust manifold up to the hot air choke boss on the intake manifold for the very purpose of supply exhaust gases to the EGR valve. Why would they then disable the EGR in the chip?

 

57,

Are you hooking up the hot air tube to the Thermac system on your HO aircleaner? How are you doing it with your headers?

 

For the every-other-year emissions inspection/test, at least. Will see how it acts during the winter as well. I suspect it will actually help during that warming up driving period.

That's a little "free" tip that I haven't heard people talk about - disconnect and plug the Thermac vacuum hose at the track. Will insure you only get cool air coming into the intake. Since most people try to make their runs with the engine only partially warmed up, that can make a difference.

So far no complaints about the headers (at least since getting them on - getting there wasn't exactly a walk in the park).

 

Do you know for a fact that the chip in the ZZ4 conversion kit disables the EGR?

Yeah I do, 'cause that's what I put in my car. I have NO EGR. The intake manifold on the crate motor comes with a blockoff plate on it. No valve, no wires, no nothing. And no codes.

That same kit includes a tube that goes from the exhaust manifold up to the hot air choke boss on the intake manifold for the very purpose of supply exhaust gases to the EGR valve.

Really? Those rat bastards shorted me a part then! Is three years to late to ask for a refund? .

At any rate, the kit came with a nice little sticker that said something along the lines of:

"This car is equipped with an HO Camaro Performance Package (P/N xxxxxxxx) and is certified to pass emissions without the original EGR and EFE systems (CARB-EO #xxxxx)".

I can take a picture of the sticker if you'd like to see it .

At any rate, I don't have any pictures that show the EGR blockoff plate because my heater core hoses run right over top of it.

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"Beware he who would deny you access to information, for in his heart, he dreams himself your master"

'84 Black Camaro Sport Coupe ZZ4 350 M6 -- '84 Olds Cutlass Supreme 231 A3
'91 Medium Blue Metallic Z28 400 A4 -- '99 Navy Blue Metallic Firehawk #120 346 M6

[This message has been edited by 99Hawk120 (edited December 07, 2001).]

 

I've disconnected the Thermac system and plugged the vacuum port at the back of the carb. My snorkels are open all the time now. Since I put headers on, I have no way of hooking up that heat tube that used to go from the exhaust manifold to the aircleaner snorkel.

That's what I am wondering how to achieve. Now I don't even know if it is worth the trouble.

 

Now I'm starting to wonder if this kit can be used in CA on a Firebird. Especially if that sticker specifically reads Camaro.

I'd really like to see it. What is the EO #?

Guess a call to the local BAR station is in order.

GP

[This message has been edited by gpierce (edited December 12, 2001).]

 

Wow, jackpot. I was looking around the CARB website: http://www.arb.ca.gov/homepage.htm

And found this link: http://www.arb.ca.gov/msprog/aftermk...es/devices.htm

If you do a search on EO for Engine Modification/Change, way down on the list is EO D-287-1 Which states the GM part # for this swap is for both Camaro's and Firebirds.

This is cool too because there are a bunch of other engine swaps listed, although not a lot for third gens

GP

 

Here's the description:

Not quite right, it does use the heat stove. What it doesn't use is the EFE system (the exhaust mounted "flapper" valve).