right now i have a stock carb. along with a performer intake on my engine...once i get a job in the next few months im going to want to save up and purchase bigger and better things . what do u guys suggest?????? here are some pictures of what it currently looks like

 

i was thinking on the lines of an edelbrock performer carb 750 cfm....and possibly an RPM AIR GAP intake..... oh yeah and along with the installation of these i will be deleting my AC and all of its power-robbing components

 

anyone?

 

Performer RPM q-jet manifold, save the carb money to buy a ... ok, after seeing your website, you have the things I was going to suggest, so, something else.

 

what

 

What do you mean what?
Questioning my advice on the intake manifold, or the carb, or what to spend your money on?

 

where were u trying to go before u stopped? just curious thats all

 

well it all depends on your performance goals in the future. What rpms do you wish to shift at? is this a daily driven car or a drag racer? Be honest with your self in how the car is going to be driven. your existing cam specs can help us out too. the performer rpm manifold is a 1500-6500 rpm manifold. (now dont hold me to that since I am shooting from the hip) Alot of people are true belivers in the quadrajet carb as a good performance carb. I takes patience to learn setting it up right plus it looks like yours could use a rebuild. some of the more trouble free carbs are the holly 750 cfm double pumper and the edelbrock 750 performer carb. it depends on your skill level with setting it up yourself.

 

well right now i shift it at 5500 MAX...its a daily driver..but i want to get more horses out of my engine without spending a lot of cash...the cam specs im NOT too sure about...its not stock but i would say its a mild cam...not very radical, but not a stocker either....i basically wana get a lil more HP without going internal. i honestly dont care that much about gas mileage or any of that...i just want more power. IN THE FUTURE..i possibly would want a new cam, or port my heads or SOMETHING...and if i was to install it, it would be the help with a mechanic...someone who knows what their doing. but i also wana get rid of all those stock hoses that are on my carb right now...i wana delete my ac and try and clean up my engine compartment..

 

and it would be nice to keep it at 5500 or 6000 MAX

 

well it looks like your old computer q-jet is old and tired and if it was me personally with your car I would remove it and get rid of the ecm and loose wires going into it. The essential vacuum accessories are brake booster and heater controls. if you are running with a older hei with vacuum advance then that needs it too. also a short fat one to the pcv valve. I am a fan of the edelbrock 750 performer carb for its ease to tune and how well it holds that tune. its not the best W.O.T. carb but it is great for a daily driver and still gives excellent performance. with your gearing and driving style you will see an improvment with a performer rpm air gap manifold. That and getting the car in good tune with fresh spark plugs and your advance set up right ill make it feel very strong. I dont know what heads you got except that they are aluminum. If you call up lunati or comp cams and tell them every thing you know about your existing combo such as gear ratio, good heads?, compression ratio, transmission, displacement, shift points, exhaust system, they can give you a good reccomendation on a cam shaft. Since you will have bought a good carb and intake, the cam will be the next step in performance. that will give you the best overall control the engines character. such as power that kicks in about 1500-2000 rpms and tops out around 6000-6500 rpms. good luck man!

 

The only "upgrade" would be a double pumper carb, and only because you have a manual transmission. Any other choice would be a waste of money vs. the q-jet you have now.

 

thank u vette man! good info indeed!!!! and i might have to give them a call later on when i want a new cam! and five7kid why not get a new intake? especially upgrading to a air gap intake? its give its a better cold charge etc...?and im assuming it will give me a lil more horepower with a better breathing carb.

 

There aren't any spreadbore air gap manifolds that I'm aware of, so you'd have to replace the carb with it. Something like a Performer wouldn't be enough of an upgrade over stock to be worth the trouble, and a taller design like the Performer RPM might give you hood clearance problems.

 

im not trying to get a high rise manifold or anything and i cant immagine the air gap being THAT much taller than the performer intake....but i THINK 750 cfm would be a lil too much for my engine...so possibly something with 700 cfm?

 

and i was thinking of replacing both my intake and carb aperion...

 

I was referring to carbs, not intakes.

If you go with a double pumper, you'd be best to get an aftermarket intake, because a square bore carb won't mount to a stock intake.

Unless you get a spread bore Holley double pumper, of course.

 

thanks for the advice! i was thinking of going to a holley intake as well, but maily i want to replace both of those. with the double pumper will i be able to get rid of all those stock wiring to the carb? like ecm etc..?and would u happen to know a part number or sumn i can look up?

 

how about a street avenger carb? 670 cfm?

 

would a road demon jr carb work with the set up ive talked about? or a demon road demon carb? argh i need help thank *** ive got this board

 

Street Avenger, Road Demon, and Road Demon Jr. are all vacuum secondary carbs. Keep your q-jet and save your money, they aren't worth it.

Any aftermarket carb will make all the wiring but the choke power (and possibly the high idle selonoid) useless.

 

The performer rpm manifold is 3/4" taller than your existing one. If you want to check it, get some inch round clay ***** and put a few on top of the air cleaner and shut the hood. Then see how bad they are squished. if they are compressed more than a 3/4 of an inch then you need to change your air cleaner to a drop base or use a thinner air filter. Also 750 cfm is not too big for your engine. Your stock q-jet you have now is a 750 cfm carb.

 

no kidding? so IN YOUR OPINION do u think with a new performer edelbrock 750 cfm carb, the rpm air gap, and along with my deletion of my AC i will see some horse power gains?

 

That's what I've got and I love it. It seems to be just enough for my 350. I would go with the RPM Air-Gap too.

Matt

 

NO!

That is the wrong type of carb. RPM intake with your current carb would make the same power. Wrong type for a manual transmission, however.

I don't know what I need to say to get it across that if you don't get a double pumper carb, keep your q-jet.

 

And keep in mind you that your dual snorkle air cleaner won't fit anymore without some type of mod done to it. I have the exact same car, minus the nice paint,door decals etc.. yours has!

He's right. Only diff will be that your not on the CCC system anymore. The Q-jet has plenty of cfm (790 I think), and I'd still run the CCC Q-jet on my 400 if my cam was milder! But - a DP carb does deliver more "punch" with a 5 speed and decent gears like we have.

 

ok im getting what ur saying now...so ur saying only go with a double pumper and not waste my money with an intake?

 

here it is....uve made my mind up, the double pumper it is...fuel line or no fuel line..? and do u like the zinc?!

 

SO IF I DID go witha "square bore" double pumper which intake would go well with that carb?

and if i got the sqaure bore w/out the intake would it even be worth it?

all i want is horse power gains...again...with out going internally thats all..

and im just a tad lost, sorry if i seem stupid...im just trying to get all of this information you guys are giving me....but thank u for the advice everyone

 

Whether you get spread bore or square bore probably doesn't make much difference, unless you're still running a stock intake. The stock intake won't mount a square bore carb without an adapter. The Performer you have now should mount either style of carb.

A double pumper won't necessarily get you any more peak horsepower. It might give you better throttle response. The Qjet you have now and the Performer intake probably aren't holding you back. Upgrades to the exhaust, cam and heads will give you a much better return. I can understand wanting to change things, but if you don't change the things that actually need it, you're only making change for its own sake.

 

well then i think i might just get a double pumper...better throtle response doesnt sound to bad to me

 

are there any electircal choke double pumpers? or does it become manual once i get rid of my ECM?

 

There are lots of double pumpers with electric chokes. Kits are also available for most models to convert manual chokes to electric as well.

 

right on thank you very much everyone...is the fuel line good to have ? or does it not matter as much...im just trying to pay as much as i need to.

and now that i have got my mind set on the double pumper would it be a waste for a new intake? or would keeping the performer work best

 

The manifold depends on your cam selection. Like I said, the performer rpm air gap is a 1500rpm to 6500 rpm manifold. That is where it comes in the strongest. guessing from your gear ratio, I would pick the rpm air gap manifold and get a cam to match the power band your shooting for. Call up one of the large cam makers for a cam suggestion. and also make sure your valve springs are good enough for it.

 

if i did purchase the double pumper along with the rpm air gap manifold...and in the future i was going to buy a better cam...im assuming it would work out better once the new cam was in and everything...? but i can afford the double pumper right now, and with that on my performer intake its not necessarily going to give me any HP, but ill see a better responding throttle? in the future im sure i can put in a new manifold, along with a higher lift cam..

but i am curious as to if i did get the double pumper on top of a rpm air gap would i see any gains? with my cam in it right now my cams gota be around like 300 lift right now im assuming, i can check my paper work when i get back home

 

Sure, a fresh new carb that is properly tuned and your distributor is also in good shape, properly timed and advanced will make a difference in performance....But I do stress proper tuning and timing! Are you suffering from off idel bog right now? is your motor sluggish in your opinon? You might try to get it tuned and timed on your existing combo right now and see if that helps your throttle response and performance. maybe you need a tune up.

 

my carb is absolutely fine, and im sure my tunning is fine

 

well then if your carb is fine, then you may try out a rpm air gap. My guess is that you will see about 5-15 hp increases in your top end, if your existing cam's power band goes that high. You can easily sell the performer manifold on ebay to get back some of your money.

 

so should i still get the double pumper as well then? if i do buy a rpm air gap?

 

after having the performer intake you have, I have tried 2 q-jets, a holley, and an old edelbrock.

In my personal experience...

I have learned that I do not like the holley. I never could get the mixture right for more than a few days, and the night and day performance was like... night and day. If I had it set up for night time, it ran poorly in the day time and vice versa.

I really liked the quadra-jet. I rebuilt it a few times, but there were some issues I had with it. I was blaming my timing problem on it. I didn't know any better.

Edelbrock seemed to get good gas mileage, much like the rochester. And it didn't seem to act like a dog either. I liked the 2 screw design on the front, and it just seemed to work better for me.

What I did...

I bought an rpm air gap, and the 750 edelbrock. It was apparently an unpopular decision, because everyone says, "that combo will never work for your car, blah, blah". It seems that the rpm air gap has gotten a bad rap for low end. the thing is, it is exactly the same as the performer air gap, until 1500. Then it takes off, not running out of steam until 6500.

What I am saying is that the rpm air gap is a solid buy. For a carburetor, holley seems to perform better, but it requires more attention. Quadra-jets are a good carb, but for me the new edelbrock seemed to do much better than my rebuilt quadrajets.

I am not telling you the gospel, but just some experience that I have had. Really you won't learn until you buy it yourself.

But as soon as you do decide on a carb choice, regardless of who it is, you will swear that it is the best brand out there. Everyone does that, and I am guilty on many occasions.

 

thank you for that advice.. did u ever try a double pumper?