i have an 84 z28 305c.i.d. and i want to get a new carb and intake manifold.

i'm only sixteen and i dont get much money.
i was thining about getting a performer rpm intake and a 600cfm edelbrock carb #1406

my question is will it fit with hood/air cleaner?

i have the catalog and the performer intakes have two different kinds one for egr and one non egr

the performer rpm only comes in non egr
will that work?

 

If you still have the original computer controlled carb you cant just bolt in a new non computer carb in its place. I think you have to get a new non computer distibutor to go with it. A new carb really wont net any big gains, the one you have is more than enough for a mild 305. Also you only need the egr provision if you want to pass emissions, you cant pass with out it. So if you want to pass emissions the RPM is out, and if you dont then defenetly get it because its way better than the regular performer. Good luck.

 

Visit EbayMotors... I got my carb and intake there (Holley carb, Ede intake) for $100 total.

 

If you don't have much money to spend on performance improvements, don't waste what you have on a carb and intake. Replacing them won't make your car any faster except for the weight reduction of your wallet.

Assuming your engine is an LG4 (8th character of the VIN is an "H"), you would gain more power by replacing the single snorkel air cleaner with a dual snorkel unit. The factory types are getting harder to come by, but they are very good. If your VIN code is a "G", you should already have it (assuming somebody didn't do something stupid like putting an open element on it). Alternatives include fabricating your own dual snorkel (there's a tech article accessed through links on the thirdgen.org home page), or getting an aftermarket type from ramairbox.com.

Exhaust is your next issue. Every piece of the LG4 exhaust is restrictive and should be replaced. Start with headers and work your way back. Parts for '86-'90 TPI single cat application are the preferred performance pieces.

Next is cam and better valve springs. At this point upgrades to the ignition coil and control module should be considered. After that is head work (porting, larger valves, etc.).

Even then the stock carb and intake manifold are still fine. An upgrade intake may help, but until you have done all of the other things I list, changing the carb and intake is a complete waste of money.

 

i have an L69 engine

the reason i want a new carb is because if I slam on the gas it bogs out so much that if i hold it it cuts off

also when i rebuilt the carb the tension spring wasn't even there like it is supposed to be do y'all know of a way to get a replacement spring

 

my air cleaner is fine but the hoses have some small hoses
and if i get new headers and stuff will i need new wires and stuff

by the way what is the purpose of egr

 

The missing tension spring would probably be the reason behind your bog.

 

do you know where i can get a replacement

 

If you have an L69, consider yourself one lucky dog. Most of what's needed is already there. The air cleaner hoses, at last report, were only available for the passenger side. But, that's fine, the only difference is the right side has an anti-chafing pad stapled to it. I'm sure the aftermarket is going to pick up the slack soon, as the factory supply is fast disappearing.

Replacing the carb, intake and distributor at great expense instead of some simple tuning is just plain silly. I've only been messing with q-jets since about 1971, but I've never seen that AV tension spring missing or broken or any other way nonfunctional. Now, I've heard things on this board that I've never seen, nor could even imagine, so I'll take your word that it really is missing. But, if the spring really is missing, the AV would always be open. Of course, the choke pull-off holds the AV closed, too, so if you have that bad of a problem, you probably have more than one thing wrong. However, whatever it is, it would in all probability be cheaper to fix that q-jet than it would be to replace the carb, intake, and distributor.

Try emailing sales@carbs.net and tell them what you need. Most likely, they'll be able to handle it. They don't list that particular part here http://www.carburetion.com/quadrajet.asp , but they have things not listed on their site.

When I installed headers, I had to change the two straight boot plug wires to 90 degree boots. Small price to pay (I eventually went with all new Summit 8mm universal wires cut to length upon installation and Made 4 U looms - much cleaner than the original installation).

EGR (exhaust gas recirculation) is an emissions control device that puts a small bit of exhaust gas in the fuel/air mix to lower combustion temperatures in high pressure/high temperature conditions. The purpose is to lower nitrogen oxide compounds formation, a major air pollutant. If it is plugged or inoperative, the typical symptom is excessive pinging under part throttle loaded operating conditions.

 

so i couldn't get that spring from autozone or something

if the egr makes a ping noise when not in use what would be an alternative.

 

Tayloring the ignition advance curve (not an easy task with CC ignition), or backing off the base timing.

 

is the L69 exhaut as restrictive as the lg4

 

Not at all.

But not as good as headers and 3" cat and on back.

 

I have 3 Q-jets in the shop pm me and I can come up with a spring