What carb to use? - Third Generation F-Body Message Boards

killa66cam · 10-20-2009, 01:44 PM

I am looking at a couple of carbs on craigslist, and was wondering what I should use. The first one is a rebuilt Q-Jet for $60. The second one is a 625 Speed Demon, with electric choke, and vacuum secondaries..that needs to be rebuilt...for $125. The Barry Grant rebuild kit is about $60. The car is a 1991 Camaro RS Convertible...with a 305 and a 700R4. This is what I have planned for the car:
059 Vortec Heads (already have)
Professional Products Carb Intake (already have)
LT4 Hot Cam (still looking)
Mallory 4309 AFPR (getting today)
Hooker 2055 Headers (still looking)
GM HEI Distributor with Mallory components (already have)
What carb would you recommend for the above setup that I have planned? Thanks.

Cam

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anthony714 · 10-20-2009, 02:06 PM

you need tosit down and really ask yourself "what am i using this car for most" and then build your carb accordingly. if its a drag car then some carbs/mods might not be so street freindly and on the flip side if its a street car with an occasional strip action you might set it up for the street but not get max benefit from it. also power and "mileage" dont tend to go hand in hand so much with a carb. with that said if its a street car and you set it up right theres absolutely nothin wrong with the qjet. theres arguements back and fourth but when done right a qjet tends to give you a little of all worlds. the one i had had no problem going low 12's and 13-14 mpg ....

killa66cam · 10-20-2009, 04:13 PM

Quote:

Originally Posted by anthony714

you need tosit down and really ask yourself "what am i using this car for most" and then build your carb accordingly. if its a drag car then some carbs/mods might not be so street freindly and on the flip side if its a street car with an occasional strip action you might set it up for the street but not get max benefit from it. also power and "mileage" dont tend to go hand in hand so much with a carb. with that said if its a street car and you set it up right theres absolutely nothin wrong with the qjet. theres arguements back and fourth but when done right a qjet tends to give you a little of all worlds. the one i had had no problem going low 12's and 13-14 mpg ....

It will mainly be a street car. Some drag racing on occasions for right now. I may add some nitrous at some point as well; but that will be later on.

Cam

thisjustaintme · 10-28-2009, 04:46 PM

Heads have any port work done? how bout the intake? id say a carb under 700cfm will work anything id say somthing like this would work http://www.summitracing.com/parts/HLY-0-80555C/

killa66cam · 10-28-2009, 05:20 PM

Quote:

Originally Posted by thisjustaintme

Heads have any port work done? how bout the intake? id say a carb under 700cfm will work anything id say somthing like this would work http://www.summitracing.com/parts/HLY-0-80555C/

The heads and the intake are completely stock...no porting. I may end up porting the exhaust side of the heads some...but we will see about that. I like that carb, but don't like the $373.75 price tag. I was looking for something around 650cfm. I found that Demon carb, that is a 625cfm, on craigslist. I can get it for a $100, and the rebuild kit would be another $60. The reason I was mainly looking at the Q-Jet is because I can get it for $60, and it has already been rebuilt. It came factory on a lot of GM vehicles...many stock SBC and some BBC. That being said, I'm sure that it would be enough for a warmed up 305...I just didn't want it to be too much, or not worth using at all for my setup.

Cam

thisjustaintme · 10-28-2009, 08:08 PM

I would stay away from demon carbs a holley style carb is the way to go very easy to adjust and change jets summit has remanufactured holley carbs on there for alot cheaper

killa66cam · 10-28-2009, 09:51 PM

Quote:

Originally Posted by thisjustaintme

I would stay away from demon carbs a holley style carb is the way to go very easy to adjust and change jets summit has remanufactured holley carbs on there for alot cheaper

So you would recommend the Q-Jet over the Road Demon, of the two carbs I was asking about, right? And you would recommend a Holley over most anything else I take it?

Cam

five7kid · 10-29-2009, 03:39 PM

Stick with the q-jet.

Exactly which intake do you have?

killa66cam · 10-29-2009, 05:02 PM

Quote:

Originally Posted by five7kid

Stick with the q-jet.

Exactly which intake do you have?

Right now I have the Performance Products Vortec carb intake. I may end up getting a Edelbrock or GM Vortec carb intake though.

Cam