hi, i want you for my olds 350ci 1968 upgrade
i would like a most performance motor,
Can you help me for this modification,
i think changed...
1500-6500rpm
Edelbrock manifold 7111
Edelbrock carburator 1407 Is the cfm is correct?
i look for homogeneous configuration :Cam edelbrock EDL-7112
high volume oil pump,forged pistons and accessories...

But my problem is ,for this moment , I don't want to change my original cylinder heads 5


Is it interesting or not?

 

I have never heard anything bad about the Edelbrock Power Packages. However, I think there might be better ways, and cheaper ways to make power. I installed a Comp cam into my engine and got a good price. Plus, alot of people here will tell you Quadrajets are the way to go. They are a very streetable carburetor with alot of available power.

 

Are you from Italy? Good going with the language. I can't imagine going on an Italian website and getting information. The quadrajet is the way to go in my opinion. I'm not sure what you specifications are on your cam selection so I cannot give an opinion. The intake manifold is the one to go with though. DO NOT USE THE EDELBROCK HEADS OFFERED FOR YOUR MOTOR, EVER! They don't fit very well and require quite a bit of fabrication. I have some experience in these.

 

z11375ss, not italy , i come from belgium but i love usa.

For the thread, my actual carburator is a quadrajet 77 years it does not open completely.that is why I would like to change and not the repackaged

 

You could always rebuild the quadrajet you have. However, I am not sure if they were using computer controlled carburetion in 77. That would be something that might make it a bit more difficult to rebuild.

 

I too have a 1968 Olds 350 Rocket in my car and looking to do the same exact thing that you have listed in my rebuild.

The 5 heads do not have to be replaced, but it's a good idea to pull them off, and put in new hardened valve seats. That's the only thing leaded gas was used for

While you're at it, you might as well replace the valves, valves guides, srpings, etc

 

Boy, that's odd, as I read tis post, "A Bridge too Far" just came on the TV, flat planet huh?

Where in Belgium are you located? French/Dutch ????

 

Florent, what's it like to drive an Olds in your country? I bet you get looks like crazy!

 

No need to.

If the fuel system is up to it, your cast iron heads will support 400HP without any trouble.

Norm

 

DEPENDS ENTIRELY ON THE APPLICATION.


At power levels under about 400 HP they are not much improvement over the #5 heads, he is planning on using. I will concede, that they do look impressive, at car shows, when the hood is up.

When considering aftermarket heads, a little homework needs to be done.

They were designed with the 455 in mind as that was/is the customer base. Logically, the port/runner sizes and configurations were geared to the needs of the 455, not to those of a 350. They are an excellent choice, if one wishes to move up to higher power levels, and the RPM associated with them.

It is a "Given" that the original fuel system is seldom able to keep up, at these levels. Need I say more?

Yes, we know.

Norm

 

So they just used the port/runner sizes and configuarations from the original heads designed for the 455 and changed some things to accomodate use on a small block? I guess total cc of the combustion chambers and valve sizes would be obvious things they had to change then.....interesting.

 

I'm a bit confused, but I'll work with it.

455 Olds heads are different than Olds 350 heads because of the different flow requirements. Edelbrock only manufactures one head for Olds.

At Edelbrock, the designers goal was: RPM level (400-500 HP) on a 455, with no changes that would affect its compatibility with OEM/aftermarket replacement parts, or, that might sacrifice reliability. Adding insult to injury, the valve centerlines could not be changed, because the heads had to work on a 350, if a customer chose to go to that power level.

Norm

 

Dang, you guys are WAY over my head (or heads, haha). I'm stoked; I've got a Holley Street Dominator intake and an Edelbrock 1406 carb coming my way. I love Quadrajet carbs, but I thought I would try something different. We'll see.
I was planing on putting that on the 72 350 and in the 68 vert.
I guess I'll keep reading your posts to see where I've gone wrong and to keep improving! You guys are great!!!

 

The Edelbrock carburetor is a good carb as well. You will put it on and do a few adjustments and be good to go for months. People around here just like the Quadrajet because of the spread bore design and the kick in the pants feel it gives you when you open the secondaries.

 

My first language is French and no , i'm not a crazy guy ,but in Belgium, 1gallon of gasoline =7.7$ ,the people take for a crazy

 

For resum , Who has a mild modification on your 350 ? and what time you made 1 / 4 miles?

 

Keep in mind, you can bolt any BBO head onto a 350. The bore is only a little larger (4.125 vs 4.057 stock) and the bolt pattern is the same. So, the same reasons that you would do that are thew same reasons you you use an E-brock head on a 350, high RPM power as Norm stated. The intake runners are larger and the extra volume will hurt low end performance. That is the sacrifice for the high end flow. You will need to port match an RPM intake or other intake that has enough material on them. The E-brocks don't have the recess in them, so on the 350 which has a shorter deck fuel pump clearance is an issue. Also, the large chamber makes it tough to get much compression on a 350. And, again as Norm stated, for low 400 hp, there is no reason not to use the SBO heads, plenty of guys going right quick with them.

 

http://72.22.90.30/phpBB2/viewtopic.php?t=28012
Here are the specs to my mild 9 to 1 355 driver. That car currently has a new 10.5 to 1 355 with a 227/233 Voodoo cam in it. It is brutally hot here (Florida) so no track or dyno data yet.

 

Port (not gasket) match is always a good idea, regardless of the head/manifold combination.

Shouldn't be. How many are using an OEM type pump at, or near, 400HP?

If any are, how many experience a "lean" condition, at the big end?

Norm

 

Oops.

http://www.robbmcperformance.com/products/olds550.html

Someone probably is, but it did not exist, when the Edelbrock head was designed.

Norm

 

"Shouldn't be. How many are using an OEM type pump at, or near, 400HP?

If any are, how many experience a "lean" condition, at the big end?"

The Master/Airtex 40736 will support that Hp level just fine, and costs $40, but will not clear the E-brock head.

Hey smart-a$$ Norm, this, from RobbMc's website,
"Will Not Clear Edelbrock Heads"

Oops.

You continue to **** off with your crappy, insulting attitude and manner of posting, running good guys off of this board with your bullying tactics. The mods always support you, for whatever reason, costing this board good members who might actually contribute something in a positive, supportive manner. You suck the life out of this board and make it no friggin fun. That is an indisputable fact.

 

Yes it is. That is why I posted the link.

Can you explain, in an adult manner, what prompted this childish (and unwarranted) personal attack?

If you can, do it in a PM, instead of trashing someone else's thread.

Norm

 

Now that the BS is finished, we can pick up the pieces.

1500 is probably what you might see, but you can expect a number closer to 5500 than to 6500.

Yes. This carb will use what it needs, no more

Yes it is.

A torque converter, with more "stall", is something to consider. Contact Art Carr for the one that will work best, for you. Then, once you have driven it, you will be better able to choose the rear end gears, that will fit your own needs.

Norm

 

I found at comp cam a remanufacturing camshaft of the W-31 version (Factory muscle #402194)
range 1800-5800 rpm Duration adv. 308 in - 308 ex this is a good choice ?
if i choose this cam ,could i put intake manifold edelbrock (RPM or not ?) ,carb 750 cfm ,rebuilt th350 trans kit,which stall converter?(stock or ? ) 3.73 posi rear end .

thx

 

This is not a good cam choice for the street. Actually for anything except a restoration. You want more lift and less duration. You are much better off talking to a dedicated Olds vendor for the right cam. I have used Engles with great success. I currently have an Ultradyne (now Bullit) in my mid 10 second SB. As far as trans stuff, I like Coan. Good quality even in their lower end stuff.

Nick