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UtlGoa
10-14-2005, 12:01 PM
I just bought a 1969 Camaro with a SBC400. It has a 600 Holley on it now. I want to switch to a 650 double pumper. Will this carb be to big for my motor. The motor has 202 heads, solid cam, and headers. I don't know the cam lift.
Or would a larger carb work better.
Moneypitt
10-14-2005, 01:14 PM
I have never seen a 400 in a 69 Camaro. If it is a 400, a true 400, then the 600 is probably plenty of fuel as the 400 will not grab Rs like a 327/350. Now if it is a 383, 400 block and 350 crank, that would be a different story. Just remember that even a double pumper should not have the "secondary" recovery (after the bog) that alot of people "feel" is a sign of the secondaries opening. A well tuned carb should be a gradual, continous pull, not a jolting recovery, as the secondaries open. With a solid cam I would wager someone has made a hotrod out of the 383 combination, otherwise the 400 was a good grocery getter, and not alot more...............MP
UtlGoa
10-14-2005, 01:14 PM
Do you think the 650 will be to small for the 400? Or will it work fine. I don't plan on drag racing. I bought the car to cruise and go to car shows.
UtlGoa
10-14-2005, 01:17 PM
I questioned the guy I bought the car from about the motor. He is saying it's a SBC 400. I think down the road I'll pull the motor and either go 383 or big block.
Sleek-Jet
10-14-2005, 01:19 PM
Do you think the 650 will be to small for the 400? Or will it work fine. I don't plan on drag racing. I bought the car to cruise and go to car shows.
650 should be more than enough.
I wouldn't want to go any bigger unless I was making some serious HP and deeper gears.
UtlGoa
10-14-2005, 01:24 PM
Thanks for the info. This is my first camaro, and first chevy motor. So I'm still learning.
SmokinLowriderSS
10-14-2005, 05:09 PM
Years ago (OK, decades) I had a 74 Camaro and I put a 400 mouse in it. Great runner. I ran a 600 Vac Secc on it (list 3310), lightest controll springs were still OK in it, no bogging or soft spots anywhere. The 650 Mech. should be OK IMO but I would not try to go bigger.
GofastRacer
10-14-2005, 07:31 PM
I just bought a 1969 Camaro with a SBC400. It has a 600 Holley on it now. I want to switch to a 650 double pumper. Will this carb be to big for my motor. The motor has 202 heads, solid cam, and headers. I don't know the cam lift.
Or would a larger carb work better.
Is this a street deal or race??, if it's a street deal and you have a dual plane manifold(which you should have)put a 3310 750 on it, since it has vacuum secondaries you'll be on the primaries on cruise and when you stand on it the secondaries will open only as much as the motor needs so you won't be too big, also you'll save a bundle on gas!..
YeLLowBoaT
10-14-2005, 07:46 PM
Is this a street deal or race??, if it's a street deal and you have a dual plane manifold(which you should have)put a 3310 750 on it, since it has vacuum secondaries you'll be on the primaries on cruise and when you stand on it the secondaries will open only as much as the motor needs so you won't be too big, also you'll save a bundle on gas!..
What he said. I wouldn't run anything but vac on a street car.
UtlGoa
10-14-2005, 07:48 PM
This is just a street car. I just happen to have a 750 vac sitting in a box in my garage. I took it off my boat.
GofastRacer
10-14-2005, 07:51 PM
This is just a street car. I just happen to have a 750 vac sitting in a box in my garage. I took it off my boat.
Put it on, a little tuning and you'll love it!..
GofastRacer
10-14-2005, 07:53 PM
What he said. I wouldn't run anything but vac on a street car.
Same on a family ski boat!.
Moneypitt
10-15-2005, 07:23 AM
[QUOTE=SmokinLowriderSS]Years ago (OK, decades) I had a 74 Camaro and I put a 400 mouse in it. Great runner. I ran a 600 Vac Secc on it (list 3310),
I think the 3310 series carbs were 750s , the 600s were 1850s???MP
SmokinLowriderSS
10-16-2005, 10:33 AM
[QUOTE=SmokinLowriderSS]Years ago (OK, decades) I had a 74 Camaro and I put a 400 mouse in it. Great runner. I ran a 600 Vac Secc on it (list 3310),
I think the 3310 series carbs were 750s , the 600s were 1850s???MP
You appear to be correct according to Mor-tec. I am pulling a 1984/95 memory out of my behind here as far as list ##'s go. What I had was a square-bore, Holley Vac Seccondary, 600 CFM carb. I THOUGHT I remembered it as a list 3310-?. :idea:
Moneypitt
10-16-2005, 10:59 AM
The only reason I remember is I am looking for a 600 (1850) for my old Ford truck. The 3310, (750) is too fat for the 428 stump puller motor. I shudder to think of all the 1850s that have passed through my hands and now that I need one, well I'm sure you know that story...........MP
SmokinLowriderSS
10-16-2005, 05:01 PM
That story has about a $300+ ending doesn't it?
Moneypitt
10-16-2005, 05:47 PM
I'm trying to trade either a 3310, or a 750 double pumper for a 600....The 3310 is on the truck and running fine, the 750DP is runable, ran when I took it off.....Someone have an 1850 in "mighty fine" condition? Lets talk.....MP
YeLLowBoaT
10-16-2005, 06:52 PM
I have been looking for a good 700 or 750 dp for awhile. would you be intrested in selling rather then a trade?
Moneypitt
10-16-2005, 08:24 PM
I don't know.......Let me think about it. It is a 4779-2, runable, but could use a clean up/rebuild kit.........It also has an electric choke........Whats it worth?? Anyone else have an opinion on a fair price?...........MP
H2OT TIMES
10-16-2005, 08:30 PM
You appear to be correct according to Mor-tec. I am pulling a 1984/95 memory out of my behind here as far as list ##'s go. What I had was a square-bore, Holley Vac Seccondary, 600 CFM carb. I THOUGHT I remembered it as a list 3310-?. :idea:
Isn't there also a 3310-1 or 2 that is 780 CFM??????
GofastRacer
10-16-2005, 08:38 PM
Isn't there also a 3310-1 or 2 that is 780 CFM??????
The difference between the two is the 3310-1 is the old style 780 with secondary metering block, the 3310-2 is the new style 750 with a metering plate!..
GofastRacer
10-16-2005, 08:40 PM
I'm trying to trade either a 3310, or a 750 double pumper for a 600....The 3310 is on the truck and running fine, the 750DP is runable, ran when I took it off.....Someone have an 1850 in "mighty fine" condition? Lets talk.....MP
Ray, I think I have stock out of the box ready to go 1850, I'll trade ya if your 3310 is in good shape!..
GofastRacer
10-17-2005, 06:17 AM
Ray, I think I have stock out of the box ready to go 1850, I'll trade ya if your 3310 is in good shape!..
Well cancel that, just dug it out and it's a 3310 not an 1850, sorry bout that!.. :frown:
Jim W
10-17-2005, 07:59 AM
Utlgoa,
If you get under your car,
a 400 SBC has only 2 soft plugs per side. All other SBC have 3 per side. Just be careful cause sometimes there is a soft plug behind the motor mounts. FYI.
Be good, Jim
UtlGoa
10-17-2005, 09:00 AM
Thanks Jim,
I will check that out and see what I have.
Moneypitt
10-17-2005, 10:22 AM
Also the 400 cranks were externally balanced. See if there is a counterweight on the dampner, simular to the BBC 454, but not quite the same......MP
Kevin Heine
10-20-2005, 12:22 PM
If I'm not mistaking the 400 has a hump between the cyliners and the 350's and smaller are slightly concaved.
UtlGoa
10-20-2005, 02:16 PM
So I should go with a 750 vac sec on a street car?
Beer-30
10-20-2005, 02:54 PM
People loved the 400 blocks for their versatility. If it is, in fact, a 400 block and you pull it out for a 383, don't just give it away.
So, H-80, huh?
GofastRacer
10-20-2005, 06:55 PM
So I should go with a 750 vac sec on a street car?
YES!..
Beer-30
10-20-2005, 06:58 PM
YES!..
I'll second that. Every car I had a 3310 780 vac-sec on drove wonderfully. Right out of the box they are a great street carb.
GofastRacer
10-20-2005, 07:50 PM
I'll second that. Every car I had a 3310 780 vac-sec on drove wonderfully. Right out of the box they are a great street carb.
What's nice is you're cruising on a two barrel and when you get on it, the secondaries open only as much as the motor needs, saves a bunch of gas!..
Beer-30
10-20-2005, 08:11 PM
What's nice is you're cruising on a two barrel and when you get on it, the secondaries open only as much as the motor needs, saves a bunch of gas!..
Not so much that for me as the smooth operation. Only if there was a spring problem do they bog at all.
GofastRacer
10-20-2005, 08:44 PM
Not so much that for me as the smooth operation. Only if there was a spring problem do they bog at all.
If you're talking about the secondaries, yes you can have a bog but that gets taken cared of by tuning with different springs, but regardles whatever spring works the secondaries will only open to what the motor requires. I had one on my old ski boat and the secondaries would only open 3/4 ways, so one time I had a buddy reach over and open them the rest of the way to see what would happen, all it did was make intake noise no increase in rpm whatsoever!..
UtlGoa
10-21-2005, 07:21 AM
Here is another question for you guys? I put a pro form body and a secondary metering block with jets on my 750, will that make any diffrence? Or should I just buy a new carb.
I really appreciate all of the help.
GofastRacer
10-21-2005, 07:29 PM
Never used it but I heard that they increase performance????... :confused:
Rexone
10-22-2005, 12:25 AM
The difference between the two is the 3310-1 is the old style 780 with secondary metering block, the 3310-2 is the new style 750 with a metering plate!..
Good call Art. There was also an early 3310 with no dash anything that was like the -1 with the metering block. They went to the plate I think with the -2 to keep the cost down and changed the cfm rating to 750 (yeah like that worked for long lol). The carbs are different lengths too as a result of above so if you have a solid chrome fuel line they won't interchange between the earlys and lates.
When I had the speed shop in the mid / late 70's we were selling 1850's for 59.95 and 3310-1's for under $100, new. A 4781, 850 was about $189 or so and we thought that was astronomically absurd for a carburetor. A new dominator was about $250 I think if that.
What a difference 30 years makes lol.
GofastRacer
10-22-2005, 07:29 PM
Good call Art. There was also an early 3310 with no dash anything that was like the -1 with the metering block. They went to the plate I think with the -2 to keep the cost down and changed the cfm rating to 750 (yeah like that worked for long lol). The carbs are different lengths too as a result of above so if you have a solid chrome fuel line they won't interchange between the earlys and lates.
When I had the speed shop in the mid / late 70's we were selling 1850's for 59.95 and 3310-1's for under $100, new. A 4781, 850 was about $189 or so and we thought that was astronomically absurd for a carburetor. A new dominator was about $250 I think if that.
What a difference 30 years makes lol.
Yep I had one of those original 3310's, haven't seen one of those in ages and they're not even in the book anymore!.. I hate thinking what that stuff used to go for back then let alone what I used to pick them up at the swap meet for, LOL.. :D