Can I use the L69 HO intake with everything else being stock LG4 (heads, etc). Also, if I can do this, how much difference am I looking at between upgrading to an L69 HO and an Edelbrock Performer (both with stock Quadrajet)?

 

You can do this. I don't know how much gain though.

 

Thanks. So probably better off with a performer?

 

Not really, the Performer is comparable to the stock intake. If you gained anything, it wouldn't be enough to justify the effort.

The Performer RPM would be an improvement on the other hand, but there are a lot of other things that you should worry about first before changing the intake.

 

Such as what? I know I'm going to get the carb rebuilt and put headers on, what else should I worry about?

So is the Performer comparable to the stock L69 H.O. intake or the LG4 intake? Would an older L69 intake (pre-87) fit on my '87 LG4 motor?

 

LG4 and L69 use the same intake.

The first thing you need to worry about is the exhaust, not the intake.

 

on both points.

 

Well I just bought a Quadrajet, Intake, and Cam supposedly out of an L69 305 that the guy said was out of his 1987 Camaro.

I was just reading that the L69 stopped production that year. So was I had and these are older and won't work in my '87 LG4 (centerbolt heads)?


I had to get an intake anyways because the one I have has some issues. I'll get on the exhaust just as soon as I recoup some funds.

 

Should still work just fine, I don't see why it wouldn't? As far as the cam goes though... I wouldn't put in a used cam if its not a roller cam. But why use a GM cam anyway? If you swapped cams, you should make it worthwhile and get something from Comp Cams or Crane, not a 20 year old GM cam.

 

Yeah, I see you're point on the cam, it's 20 years old but still it only has 60k miles on it. It was a good cam for for back in the day. Should I just ditch it though? I wasn't in the market for a cam, he just threw it in cuz he got rid of the Camaro and now has a Mustang GT.

Oh, and the intake is the exact same one I have now, I matched up the GM#'s tonight. So it should work. I guess I'll just leave the stock intake until I get into a new motor (350 or 383)... The guy I bought the parts from had an '87 Camaro with the L69 305 H.O. and put an Edelbrock Avenger intake and new carb on it and saw very minimal results and didn't recommend it.

 

Just goes to show, the carb and intake aren't the places to spend money.

You could have saved some money. The carb and intake you bought are the same as are on your LG4. The cam is different, but you can't use it.

 

Well, see, if you replace the cam, you need to do all the disassembly, replace all the gaskets, seals, etc, as well as buy new lifters. All the same stuff you'd have to buy to put in a new cam.

The mileage isn't the issue with using that cam... its the fact that is such an old design, thats really only marginally better (at best) than whats in there now. If you are going to do a cam upgrade, get a newer, more modern cam grind, like Comp's XE256 or XE262. They will run circles around the L69 cam, sound better, make more power, and get the same or better fuel economy to boot. Absolutely no downside to upgrading to a more modern cam than that.

 

The real issue with that cam is trying to put an 87 factory roller cam into an 85 non-roller block. Won't happen.

 

I needed a new intake and carb anyways. Mine are busted.

About the 87 factory roller cam into an 85 non-roller block...thats not my scenario. I have an '87 LG4 motor out of a Monte Carlo. Pretty sure that is a roller block.

I wasn't planning on doing a cam in the near future, the guy just threw in the cam with the parts I bought and I thought it'd get me some decent gains, but it doesn't sound like it from the comments on here. Oh well, I guess I'll just sell the cam.