iroccopz28

I have an '86 Iroc with the 305 LG4 carburated and 5speed. I want to make some changes that will allow for more get-up-and-go, i'm sure you know what I mean Anyways, I live in Pennsylvania and need to be able to keep stock emissions in order to keep getting legal inspection stickers. I am wondering if anyone can give me some tips on where to start with this motor.

I have heard that I can get a 350 and use my intake and heads for more power and still keep the emissions. I am not sure if that is true or not. I would like to to keep my engine though if possable, but if I have to change it, I will see if I can get something else as long as I can keep the car emissions legal.

Thanks in advance for any helpful information,
Jim

Street Lethal

iTrader: (16)

Jim, you have an excellent platform to work with. What I would do, is, pull the stock heads and give them a nice thorough porting. Try to get your hands on an aftermarket intake manifold (preferrably w/EGR, as you already noted), and port to match the heads. Consider a nice custom ground camshaft for your application (for your stock Static/Dynamic compression levels), and upgrade the rods/hanger in the carb to compensate the added fuel needed. You also might want to look into an L69 Prom for a more "performance" calibrated tune....

-Rob

iroccopz28

That sounds a lot better then what I was expecting to hear. Everything that you said made sense to me, but i am not familiar with the rod/hanger part for the carburator. Everything thing else you said, I think I will be able to do.

Thanks for the information,
Jim

Street Lethal

iTrader: (16)

Jim, here is an excellent article written by Ed about tuning the quadrajet, Click Here....

-Rob

Guro 305

Some pix would've been nice in that article. Sorry, I'm all visual.

I can't just read, I need to see as well.

iroccopz28

Thanks again for the information, I found that article to be informative and something that I am going to have to spend some time looking into some more. I think I am feel a little better about getting into this project now. I will have to do some priceing of parts and I am sure that i will have more questions before to long.

Thanks again,
Jim

five7kid

iTrader: (14)

There is a sticky in the top section of the Carburetor forum that has the factory service manual information for the E4ME. Even has pictures.

There is a thread in the FAQ forum about the differences between 305's and performance modifications. A bunch of good information in there.

iroccopz28

Thsnk you for the information, I will look into it...

Thanks, Jim