My old 350 had a q-jet from a 1985. I had this truck when I was 17, so I beat the s*** out of it, and used to jump it, until I broke the frame doing that. The carb never had problems from angles or hard impacts.
Best off road carb for 350 chevy?
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I have a Holley Truck Avenger carb too.
It works as advertised - 30 degree side to side tilt, 40 degree inclines. Spring loaded needles. Tall vent line. Bolt it on and it works.
That's the good news.
Now the negatives. This is one carb that you definitely do not want to oversize for your engine. My 350 is stock. The PO put on a 670 Truck Avenger. This carb is way too big for the application. I just don't turn the engine over 4000 rpm. Doing all the formulas, it should have something from a 390cfm to 470 cfm. The 470 Truck Avenger probably would have been a better idea. But even then, these carbs run way rich. They're designed for an engine with a big cam, large ports and large valves. I've jetted mine down substantially, put in the stiffest secondard spring, and changed the power valve. It runs leaner now, but the mileage still sucks (9.2 highway) and the power is less. I don't think it's going to get any better than this. It's still on the rich side, but won't lean down any more.
I was getting ready to find and put on a 2100. Hadn't considered a Quadrajunk. But with all the recommendations above, perhaps I ought to consider one. I don't know much about them. Just how much tilt can you put on one? Anyone have a favorite online tuning guide they'd care to recommend? Need to figure out what options there are for chokes - like integral, divorced or maual. Are they sensitive to fuel line pressure? Anyone with a 350 powered FJ40 and a Q carb, what's your mileage like?
It works as advertised - 30 degree side to side tilt, 40 degree inclines. Spring loaded needles. Tall vent line. Bolt it on and it works.
That's the good news.
Now the negatives. This is one carb that you definitely do not want to oversize for your engine. My 350 is stock. The PO put on a 670 Truck Avenger. This carb is way too big for the application. I just don't turn the engine over 4000 rpm. Doing all the formulas, it should have something from a 390cfm to 470 cfm. The 470 Truck Avenger probably would have been a better idea. But even then, these carbs run way rich. They're designed for an engine with a big cam, large ports and large valves. I've jetted mine down substantially, put in the stiffest secondard spring, and changed the power valve. It runs leaner now, but the mileage still sucks (9.2 highway) and the power is less. I don't think it's going to get any better than this. It's still on the rich side, but won't lean down any more.
I was getting ready to find and put on a 2100. Hadn't considered a Quadrajunk. But with all the recommendations above, perhaps I ought to consider one. I don't know much about them. Just how much tilt can you put on one? Anyone have a favorite online tuning guide they'd care to recommend? Need to figure out what options there are for chokes - like integral, divorced or maual. Are they sensitive to fuel line pressure? Anyone with a 350 powered FJ40 and a Q carb, what's your mileage like?
Holley
I have a Holley Truck Avenger. I love it. I have a 670 cfm on a 350 with Vortec Heads, Edelbrock Air Gap Intake, and Comp Cam 262 extreme energy.
It seems to be the perfect carb for it. I have a Edelbrock 750 Performer on it. I gave it away and told them to never bring it back around. Never could get it dialed in. Even with the spring loaded needles and seats.
JR
I have a Holley Truck Avenger. I love it. I have a 670 cfm on a 350 with Vortec Heads, Edelbrock Air Gap Intake, and Comp Cam 262 extreme energy.
It seems to be the perfect carb for it. I have a Edelbrock 750 Performer on it. I gave it away and told them to never bring it back around. Never could get it dialed in. Even with the spring loaded needles and seats.
JR
My Edelbrock runs fine on any angle I can keep the rubber down on. I've had the suspension unloading going upwards and comeing down without a hicup. A buddy laid his rig on its side a couple of weeks ago. Had to turn the engine off ith the key as the Edelbrock was functioning just fine. I won't claim you can count on this, but we have no problems with them. And they're inexpensive to boot.
Mark...
Mark...
Kdink79-- I don't know if you got a part number for your carb yet, but I just got one and it was a 3-78A. It shoulb be for an early 70's half ton truck.
they don't like to be filled with water and sand though..... Snorkel coming soon.
Bret
they don't like to be filled with water and sand though..... Snorkel coming soon.
Bret
Eldelbrock 1400
I'll sell anyone my carb.
"This special part# 1400 600 cfm carburetor is a Street Legal, Electric Choke, 50-state street legal for all 1980 and earlier General Motors V8s (E.O. #D-215-10). Calibrated for maximum fuel economy. Includes timed vacuum ports, EGR and fuel vapor outlet. Not for computer-controlled engines. Comes with the following jets, rods and springs: Metering Jets: Primary .098, Secondary .095; Metering Rods: .073 x .047. Step-Up Spring: orange (5" Hg). Edelbrock square-bore carburetors are all-aluminum, ball-burnished and lightweight. There are no power valves to blow or plastic parts to break. The two-piece construction resists warping. Metering rods can be changed within seconds without carburetor removal. These all metal carburetors are also compatible with gasohol and blended fuels. Their simple tub-type bowl and rear-pivot floats offer you trouble-free operation. The Edelbrock square-bore carburetors are available for many applications and available with either a calibration for maximum fuel economy or a richer calibration for modified engines. "
Almost 100 % new. Carb ran for 8 hours only. Bought new from Summit. I have all the paperwork.
I will include an adapter/spacer plate for a 350 that I paid $75 for for free.
I paid $266 plus shipping.
Sell to you for $180
I'll sell anyone my carb.
"This special part# 1400 600 cfm carburetor is a Street Legal, Electric Choke, 50-state street legal for all 1980 and earlier General Motors V8s (E.O. #D-215-10). Calibrated for maximum fuel economy. Includes timed vacuum ports, EGR and fuel vapor outlet. Not for computer-controlled engines. Comes with the following jets, rods and springs: Metering Jets: Primary .098, Secondary .095; Metering Rods: .073 x .047. Step-Up Spring: orange (5" Hg). Edelbrock square-bore carburetors are all-aluminum, ball-burnished and lightweight. There are no power valves to blow or plastic parts to break. The two-piece construction resists warping. Metering rods can be changed within seconds without carburetor removal. These all metal carburetors are also compatible with gasohol and blended fuels. Their simple tub-type bowl and rear-pivot floats offer you trouble-free operation. The Edelbrock square-bore carburetors are available for many applications and available with either a calibration for maximum fuel economy or a richer calibration for modified engines. "
Almost 100 % new. Carb ran for 8 hours only. Bought new from Summit. I have all the paperwork.
I will include an adapter/spacer plate for a 350 that I paid $75 for for free.
I paid $266 plus shipping.
Sell to you for $180
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I have a road demon gas sucker 4 barrel. Have yet to hook it up, but I've heard noting but good things about'em. They only specilaize in Carbs so they might know what they are doing....
I calculated 13 mpg on my fj40 with a slightly hopped up 350 (bored 30 over, RV cam, 10.5:1 pistons) with the Qjet. Its also SOA with 35's and a SM465 and 4:11 diffs. And thats running it rich as well.
I'm not sure what angles yet, havent had it on anything uber extreme yet. But not one hiccup yet.
I'm not sure what angles yet, havent had it on anything uber extreme yet. But not one hiccup yet.
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I did a road trip with my FJ40. The carb is leaned out as far as I can take the primaries. I'm getting good plug readings. I might be able to lean the secondaries more, but that won't affect cruise economy.
With the mild 350, 4.11 gears and 33" tires, I'm only getting 9.2 mpg with the 670 Holley Truck Avenger. I don't think it's going to get any better than that. That's at 65 mph freeway.
I've never fiddled with a Rottenchester, so I'm totally ignert about them. Picked up a book to do some studying up. Despite their being more complex to tune than a Holley, apparently they are outstanding for economical mixture. I looked up an application for a 1975 GMC/Chevy pickup with a 350. Holley sells these rebuilt. It has a plenty of vacuum fitting on it, including one in the rear base for vacuum, and a PCV in the front. It uses a divorced choke, so the manifold has to have a provision for it.
With the mild 350, 4.11 gears and 33" tires, I'm only getting 9.2 mpg with the 670 Holley Truck Avenger. I don't think it's going to get any better than that. That's at 65 mph freeway.
I've never fiddled with a Rottenchester, so I'm totally ignert about them. Picked up a book to do some studying up. Despite their being more complex to tune than a Holley, apparently they are outstanding for economical mixture. I looked up an application for a 1975 GMC/Chevy pickup with a 350. Holley sells these rebuilt. It has a plenty of vacuum fitting on it, including one in the rear base for vacuum, and a PCV in the front. It uses a divorced choke, so the manifold has to have a provision for it.