Carb Recommendation for newbe
#1
Carb Recommendation for newbe
I've just installed a new 350 rocket in my 70 convertible with the following performance upgrades and was looking for a better carburetor choice.
Specs:
350 long block core from Napa
Hedman Exhaust Headers (very tight fit beware)
New alum. water pump - Mondello.
New Edlebrock 3711 performer intake manifold- Mondello
New adjustable valvetrain – Mondello
New Hyd. Cam Jm18-20, .488 IN, .496EX, 260/266 duration- Mondello
New JM 830 Annular Carburetor (vacuum secondary) – Mondello
all except headers Mondello recommended
The last recommendation I think was flawed and I’m thinking its too much CFM for such a heavy car with stock gears. (of which I’m not sure- highway cruising) I do want to change to 4.11 gearing. It's got a Th350 trans with a shift kit too.
Any thoughts?
thanks in advance
Specs:
350 long block core from Napa
Hedman Exhaust Headers (very tight fit beware)
New alum. water pump - Mondello.
New Edlebrock 3711 performer intake manifold- Mondello
New adjustable valvetrain – Mondello
New Hyd. Cam Jm18-20, .488 IN, .496EX, 260/266 duration- Mondello
New JM 830 Annular Carburetor (vacuum secondary) – Mondello
all except headers Mondello recommended
The last recommendation I think was flawed and I’m thinking its too much CFM for such a heavy car with stock gears. (of which I’m not sure- highway cruising) I do want to change to 4.11 gearing. It's got a Th350 trans with a shift kit too.
Any thoughts?
thanks in advance
#2
Nothing beats a Quadrajet. They are just hard to find. I myself havent had good experience with the holley rebuild service, but maybe you will. Other than that, i would recommend like a 650 holley. They are EASY to keep tuned properly. However im not entirely sure what will work the best.
#5
Not busting chops here, but what heads are on that 350? Chances are it has VERY low compression, like in the 7.6 to 1 neighborhood. If that is the case (not saying it is, but I bet'cha it is) you are too aggressive on the cam, intake, gear, converter and carb. What heads are on it, 3A?
#6
WHOA big fella!!!
830m annular is WAAAAAAY too much for that engine.
350 long block core from NAPA tells us nothing about the engine, except it displaces 350 or so cubic inches.
The cam may be too big, depending on how engine was built, just like cap'n said.
Go big on the heads, and small on the cam instead.
A q-jet is the way to go. Not hard to find at all, out here. Make some calls.
Quit spending your money at Mondello's unless you like a ball hone up your exhaust pipe. You will get it in the end.
The problem is Joe is not there anymore.
830m annular is WAAAAAAY too much for that engine.
350 long block core from NAPA tells us nothing about the engine, except it displaces 350 or so cubic inches.
The cam may be too big, depending on how engine was built, just like cap'n said.
Go big on the heads, and small on the cam instead.
A q-jet is the way to go. Not hard to find at all, out here. Make some calls.
Quit spending your money at Mondello's unless you like a ball hone up your exhaust pipe. You will get it in the end.
The problem is Joe is not there anymore.
Last edited by Warhead; May 10th, 2008 at 03:43 PM.
#8
#9
Thats the exact one im buying tomorrow from schucks. They are having a 3-day 20% off sale on any single item over 100 bucks. So that 336 dollar carb just became like 268 bucks. Cant afford not too, considering every other parts store wants like 350 for the carb, and isnt doing the sale right now.
#11
I have heard that about a million times and believe there is some truth to it. I have never personally had the pleasure to deal with Joe or the dis-pleasure to deal with Lyne (sp) or whomever it is running the show there now so I have no personal experience, just leave it at that.
#13
This is a GREAT carb if you want to stick your head under the hood to tune it every weekend.
Edelbrocks are good too. I just like the kick in the pants feel of the secondaries opening on the spread bore Quadrajet. Tuned right the Quadrajet is very streetable. If it isn't done right it is a nightmare. I do agree that Edelbrocks are probably easier to set up.
#14
I went with a 650 Edelbrock Thunder series with the adjustable secondaries, but now I'm starting to have buyers remorse. I haven't had a chance to run it yet, but I was pretty fond of the big ole secondaries in my Q-Jet. Not to mention it was a good carb for around town driving.
If the Edelbrock doesn't give me significant gains, I'll probably rebuild the Q-Jet I have and put it back on.
If the Edelbrock doesn't give me significant gains, I'll probably rebuild the Q-Jet I have and put it back on.
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