Is the Edelbrock Performer Intake any good?....I've been told its the same as stock.

 

If you don't put a set of headers and exhaust on that engine, you won't feel much difference with a Performer intake. Port and polish the heads, too (follow the link at the end of my sig), and put in a cam similar to the one I run.

Then you'll know that engine is feeling its oats

 

It's basically a copy of one of the better stock intakes.

That's not what makes the LG4 slow. Don't waste your money unless your current one is broken.

The things those cars (note I said "cars", not "engines") are, in order of importance: exhaust all the way from the heads to the street, but don't buy ANYTHING that fits LG4, get something like 350 TPI headers; then a cam, something like a Comp XE256H or XE262H at the most; then gears, you have 2.73s now, get 3.42 or 3.73; then head work. Somewhere along the line it should get an air cleaner; the best setup is the L69 one, not an open element, and above all not a "drop base" aftermarket one.

I have a 305 in my car right now, came as a L69 car; has the same intake manifold as your car, by part number. It has the stock L69 air cleaner, stock computer-controlled Q-Jet, stock intake, Edelbrock TES and stock L69 exhaust behind that (much larger than LG4 exhaust). The only real mods to it are a set of better-flowing heads (double-humps) and a Comp XR264HR cam. It has every emissions device installed and operating, including the cat, AIR, EGR, etc.; it's set up to pass California emissions isnpection, which it easily did while I lived out there. It puts about 210 HP to the rear wheels - 214 at one dyno, 208 at another; that's more than alot of modded 350 TPI cars can manage. Compare that to a typical LG4 car's 130 or so RW HP.

Notice - the stock intake, same part # as yours. You don't need a different one until you take a whole lot of other restrictions out of your induction system.

 

i changed the stock intake on my old 305 and noticed alot of difference over the stock one and i didn't have headers

 

Was that using the notoriously accurate "personal butt dyno", or do you have measurements? ETs, lap times, dyno readings?

 

Ok, my exhaust is decent. Hedman shorties, lowsy 2.5 inch pipe although the bends are nice, and I now have 3 inch from y-pipe back. 305 heads (the ones on the L69, can't remeber #). Motor is 350 with xr269hr cam. With the stock q-jet manifold right before I took it off it G-teched a best 14.8 at 101 mph. The following day with the Performer RPM it G-teched at 14.7 at 103 mph. I actually made a few runs each time but these two were the only ones I was able to get decent enough traction (my goodyear gatorback IIs have a high tread # 420) to be an accurate assessment. My mphs were a mile or two higer with the performer RPM but for the money and issues with hood clearance I would not do it again. I personally doubt the regular performer will make that much of a difference at all.

However down the road with porting these heads or getting aftermarket ones the RPM way make a bigger difference. Hmm, I wonder if I will do the test again when I do it or just stick the performer RPM on.