Stock quadrajet
12-26-2010, 10:33 PM
#1
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Car: 1985 Camaro Z-28 T-top
Engine: 4bbl 305
Stock quadrajet
I just recently purchased my new (to me) third gen Z-28 and I have never had a carburetor before in anything I have ever owned. I would like to start making some modifications to give my engine a little more than stock horsepower. I don't really want to do the LSX swap, well I do but its just not practical for me, I read that the stock carb can put out 750 cfm if tweaked right and I have also seen a lot of 600-650 cfms on performance engines. How do I make mine get that and what is it stock? There might even already be a thread about this but I am new to the board. I would at least like the horsepower that my 3s has.
12-26-2010, 11:16 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Stock quadrajet
The carburetor isn't even close to the first thing to start messing with to increase power. What modifications have been done to the car already, if any?
12-27-2010, 02:26 AM
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Car: 1985 Camaro Z-28 T-top
Engine: 4bbl 305
Re: Stock quadrajet
None as of yet and I wasn't planning on messing with the carb first I just wanted to get a little insight as to how to do it when I get there. It has a new exhaust system on it but its a stock setup that the previous owner just had installed so no real performance gain there but thats all thats been upgraded.
01-01-2011, 01:26 PM
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Car: stock car
Engine: 350 Chevy
Transmission: 1.76 powerglide
Axle/Gears: 3.73s
Re: Stock quadrajet
honestly the first thing i would do is put headders and a complete exhaust.
01-01-2011, 02:35 PM
#6
Re: Stock quadrajet
You carb flows either 650 or 750cfm though I can't recall off hand how to tell the difference. Either way, your carb is plenty big enough to run anything up to 400+HP. As stated earlier, I'd start with headers and a 3" exhaust (for single exhaust). This alone should free up 20-40hp. After that, I'd put new sway bars under it, front and rear as well as a "wonder bar". Also Polyurethane bushings all the way around. A well handling car "feels" faster because of how it handles. After this, it's all about "how much" you want to spend. Best of luck!
01-01-2011, 02:42 PM
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Car: stock car
Engine: 350 Chevy
Transmission: 1.76 powerglide
Axle/Gears: 3.73s
Re: Stock quadrajet
perfectly stated above how much you want to spend. I just put heads cam lifters intake roller rockers throttle body headders full exhaust and a few things here and there. total price was 3500 roughly. I did all the work on my friend Ryans 89 Iroc L98 tuned port. but ya it all depends on your budget.
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