rochester quadrajet

any one got any suggestions about the quadrajet with
electronic choke. mine needs rebuilt and some told me that
id be better off to just buy a brand new one

get a sqaure bore carb. There so much better.

if you know how to rebuild it then i would personly go that rought. they are not hard to rebilt you just need to pay atention when you take it apart so you dont lose anything and so you know where everything goes when you put it back together. its pretty straight forward and if you get a rebuild kit from your local parts store then it has a diagram showing all the parts, (not the greatest by anymeans though). as for getting spacificaly a carb that has a square bore, thats kinda up to you. i like spread bore cars, i personly run a quadrajet, cuz they have the small primarys and bigger secondarys so it gives you more or a respoce, not totaly sure how to put it, when you get into the secondaries. lets just say you know when the secondaries open up. now if you dont want to rebild it yourself or have someone do it i would say to just go buy an edelbrock carb. they are a pretty good right out of the box.

let me tell ya from experience, if you've never rebuilt a carb, dont make a quadrajet your first attempt

why is everyone so scared of quadrajets. i would prefer to rebuild a quadrajet over a holly anyday. i have done both. the only carb i can think of that i have herd is easier is a edelbrock. i dont know about that cuz i personaly have never rebuilt any edelbrocks.

well i wasnt scared of the quadrajet, but i was
wanting to keep it and my brother said it was
junk and it would probaly cost a lot to rebuild it

oh, i wasnt refering to on when i was talking about people being scared. i was more refering to the coment that 4onFloor said. if you have it profesinaly rebilt then it will probably cost quite abit. probably not as much as a new carb but im not sure. like i said i do my own so i dont know how much someone would charge. but they are by no means junk. i personaly prefer them over any other carb. they are very tunable if you know how to tune them corectly. but your best bet might be to get a new carb. if your going to do that and want a quadrajet still you can get one from jet. i know either summet or jegs sells Jet quadrajets and they have different levels for different performance levels. (Jet is the name of the company incase you didnt know)

I know some Z28's and Trans Am's come
with a quadrajet that was tuned buy a
computer. the model i have come off
an 85 camaro 305 liter. i had the motor
bored out to a 309 and bought new pistons
and had the heads port polished and a valve job.
I wonder what kind of power it will make. thats
why im kind of skeptical about the old quadrajet.

Every Chevy guy i know thinks Quadra-jets are junk and toss them for another carb as fast as possible.

that must be because you dont know any chevy guys that work on carbs. there arnt very many people that like them actualy. yet for some reason they came on many many GM cars from the 60's all the way throught the 80's. there must be something good about them for GM to have used them for so many years. people dont know anything about them so they dont like them. thats the way the world works, if you dont know anything about it you dont like it. its called ignorance. but i personly prefer them and i know how they work and how to make them work.

I like the Q-jet. It's just a very sensitive carb. My first rebuild was on a Q-jet, and I found it to be fairly easy. Just be sure to adjust the choke spring properly or you'll only run on 2 barrels. Check for warping of the air horn, make sure the throttle plate bushing isn't worn, and make sure to set the float level very carefully.

A problem that most Q-jets are known for is hard starting when cold. This is most likely caused by the main well plugs. They shink over time and let fuel drain when the engine is shut off. Use a quick set epoxy to seal them before re-assembling the carb. Just my 2 cents

get a sqaure bore carb. There so much better.


NUFF said

very good advice burnM. and its all true. its nice to know im not the only person who doesnt believe all the myths they hear.

so what square bore carb whould you two recomend twin89s and 1992rs? im just curiouse.

I have to agree. The Q-jet has a bad reputation because most people don't know anything about them. I have rebuilt Q-Jets and Holleys and I can honestly say I prefer the Q-jet.

i never said the quadrajet was hard to rebuild. i just wouldn't take your first stab at rebuilding a carburetor at a quadrajet. i've rebuilt quad's,holly's,even the ricer carbs on the early sentra's. and actually, i think the Carter carbs are easiest to rebuild, but not a big fan of em

For a stock to mild 350 Holley Street Legal 600cfm carb should do you good. it is in the jegs and summit catalogue's. Also the name says it all. Street legal lol

If you know what you are doing with cars, why not try putting fuel injection in your car. Its alot more reliable than a carb and they start up in the winter too.

new carbs electric chokes arent bad.... Seriously my cordia sometimes starts better in the winter than my TBI and my tbi pretty much fires right up.

EFI can be a bitch to install if you dont currently have it. Sometimes its too much to take on and too pricey compared to the price of a new carb.

so then whats wrong with a holly spread bore. oh and incase you didnt read it, the one your talking about also says... "installaton on spreadbore-style manifolds, howerver, requires an adapter plate for proper mounting". im betting that the spread bore would be a better carb than the square bore, and would be more of a bolt on and not require aditional parts.

yeah EFI will be like 2 grand or so and a carb would onyl be a couple hundred dollars.

the adapter is 20 bux at autozone. I sold my old 600cfm carb to a guy with an 83 I think it was Z28 and he reported a gain to me and the carb prolly could of used rebuilding!

yeah, the only thing i like about a holly is that it seems to have a little more responce when you first hit the gas but i hav run hollys, (sguare bore), my quadrajet, and my dads old spread bore holly on the same engine. i would not chose the square bore for anything unless i was more concerned with economy maybe. but even so you can tune the quadrajets to run perfect on the primarys and then still have the big secondaries when you hit the gas. there is a big difference when the seconaries open up. not with a square holly though. if you havnt riden or drove a car with a strong engine and a properly tuned quadrajet i highly recoment everyone should. there is a big difference.

I rode in his car with the decently tuned quadrajunk it wasnt much... now I havent ridden in it with the new holley but from a stop just flooring the throttle it will spin them a bit longer from a stop.

thats a bummer you dont like in cali. i would take you for a ride and show you what one can really do, and then come back and put on my holly and show you what they dont do.

i called a salvage yard today and they have
several tuned port engines out of 91-92 z28's
for $400.00 i can buy the whole engine and
get the wiring harness and anything else i need
off the car to make it run.

well that doesnt sound to bad.

where the hell do you live? around here they like to 300-400 just for the tpi injectors plenum runners lower manifold.... 500-600 for the wiring harness and computer with the complete TPI setup.

yeah EFI will be like 2 grand or so and a carb would onyl be a couple hundred dollars.

eh brand new maybe. the engine in my sig was a quadrajet at one time. which i know tbi is cheaper than tpi, hence the fact that it's not a tuned port. but for the throttle body, dist, coil, sensors, harness, and lots of other things cost me $180 used. which is a small price compared to whats sitting inside that block. But i just wanted something reliable and fairly fuel efficient but yet good enough to hold it's own when cruisin. dont really care too much about 1/4 miles times, and even if do go that path there's always bolt on mods.

and imho, anyone who pays $2000 for aftermarket fuel injection is nuts. the holley projection and holley mpi system are a rip off. it's a closed loop system, so you throw engine codes out the window. and they charge you an extra $100 just for an O2 sensor.

yeah i ment new. i have debated on putting EFI on my car. its not built for long cruses, but i sometimes drive it up to where we go fishing,( a 6 hour drive), and we go up in elevation and then my car just dogs down. also i wouldnt mind getting the little amout more MPG that i would get with EFI. i dont think it would be alot cuz i do have my carb tuned extreamly well, well until i switched jets and screwed everything up. do you like the TBI on your car. im not to crazy about it but it would be an easier swap wouldnt it?

i live in kentucky you can always find a dumb
hillbilly with a junk yard. some will charge you
100.00 and you can strip a car down to its frame.
(those are the best.) i will be picking up my
350 tpi this weekend for 375.00 and thats for the
wiring computer all the little sensors, even the
corvette style air box, the car its coming out of
is a 92 25th anniversary its got all kinds of goodies
on it. it on thats white with the red racing stripes.
id like to buy the whole car and fix it up but he said he would only part it out.

grab me the instrument cluster lol

your camaro is just like mine. mine has a set of eagle alloy 5 star rims they are 15x8's. i have a
cluster that has the round guages. if the man
doesnt watch me i'll grab cluster and send it to
you. does you car have the flat new updated
cluster or w the round guages

need anything else????????

hmmm....

hehe hate to jump in but how bout the shifter plate for a 5 sp? lol

hmm i ll see what i can come up with i never asked
what kind of tranny it has. ive got and automatic
plate and radio trim plate. ive gotten extra leather
t top bags, rear window defroster buttons, i need
1 thing that i cant find any where, a console lid.
every one i find is busted open or cracked lick mine.

im goin to the junk yard to look around tom or sat. ill see if i can find a nice consol lid, black or??

yeah black

ok ill see what i can come up with

i found a nice overhead console in the junk yard once it had the auto dimming mirror and maplight
i gave 45.00 for it. its cool. i would really like to find a factory cd player for an iroc-z, have you ever seen one?

hmm, no i havnt, the junkyard around here take out the cd players, they ususally leave the old factory ones in that dont look like there worth alot, ive never seen the iroc cd player, ill look for that also

flat cluster 145mph cluster... let me know.

does you car have power windows? that way
if if find some shifter plates for your 5 spd i ll
get the right one

no it doesnt, but i dont care ill take either one, doesnt the shifter plate end right b4 the power window buttons?

are you fellows still in high school? i know its late
were i am 3:29 and im at work. i get off in 30 minutes.

where do you work at 3:30 in the morning?

haha.. nah im just outa highschool, and lost my job a little while ago, o well it sucked anyways, so i dont have no where to be tom mornin, yea its 330 here too im ususally up every night at this time, i jus cant sleep

you know i have never noticed, i ll have to check
my car is a 5 speed too. now that i think about it
it does end before the switch, my trans am
has the switches on the shifter plate.

oo yea, i think on the trans am there connected, but on the camaro there seperate, the switch plate it part of the console and stuff

i work for a coal company. i weigh the coal trucks
that comes in on night shift. thats over with at 8pm
then i have to audit all the loads, 250-350 loads
per day are brought in here to be put on a train.
usually after 1 or 2 i m done and just sit here
chatting with you guys.

thats not bad. gettin payed to sit and talk about cars, with a little work on the side.

haha lucky bastard, id love to have a job like that

i guess im kinda lucky, its only 12:35 here. i can stay up late/early and chat but once everyone out east finaly goes to bed it gets boring, and i am still up for a few hours after.

it pays 14.82 an hour 60-65 hours a week.

thats over 800 a week

damn. i wish i could have that much to put into my car. i need a job. im on my year off of school. i planed to get a job and work on my car more but i decided if im takin the year off im taking the year off.

before taxes i draw 1,776, still getting about 1,400
after.

i kno, if i had that kinda money to put into my car i would have one badass car, considering i dont have any bills to pay, lol are you just outa college or hs?

thats every two weeks