Thread: sbc 400

Tweet

do any body have any pic so i can see about how to do this or a web sit

Originally Posted by tango

I won''t tell you that . 23 More cubes . That Like a 327 to a 350 . And you won"t have to grind down all the parts and block to make thing's fit . Or run a camshaft that the rods won't hit . Na the 406 you will Like . Later go up to a 427 SB or a 434 COOL

I think I need to add this.
The only way you won't have to do any grinding is if you run the stock length 5.565 rod.
I really hope you will try and run either a 5.7 or a 6.0 length.
With the heads you have and the camshaft you have I.M.O. you will be in the 550 horsepower area.
Is the cam you have now cut on a small base circle??
If it is not you will have to do some grinding on the rod bolts.
There are some I- beam rods that use cap-screws.
Competion products sell these Scat 4340 I beam rods for less than $250.
All this means is the bolt screws into the rod and there is no rod nut on them.
If you don't like to grind on anything then don't build a 427 or a 434 because they are all about grinding.

Originally Posted by demetrice askew

the cam is 276/284 at @.50 lobe separation is 106 and 110. And the heads are 210cc/66 i thank the valves are 2.08/1.60

Back on track with the 400 here:

This is too much cam for your compression now. It can be covered up though with a high stall. Bottom end will be soft if the converter is too tight.

Are you using a tranbrake?

Originally Posted by camaro_fever68

Back on track with the 400 here:

This is too much cam for your compression now. It can be covered up though with a high stall. Bottom end will be soft if the converter is too tight.

Are you using a tranbrake?

Add to this; It's going to want more than a 6k rpm shift point also. You need a cam in the 260 @.050" range.

I dont have a transbrake how can i tell if the stall to tight

Buy a police scanner and wait til it's time to get it out on the street and test it.....

Do you know the rated stall you are using? Too small of a stall for the combo and the engine is lazy coming off the line.

A 276@.050" cam is going to need at least a 5500 rpm stall. You also need about 14:1+ compression

That cam is rated at 4400-7800 rpm. That's way too much cam for your combo of parts.

If you are wanting to turn this engine 6K rpm, sell both those cams and get a good cam for your combo. A comp 12-900-9 comes to mind. Get it on a .900 base circle though to have a little extra cam to rod clearance. I'm running this cam in a 383cid with 11:1 compression on pump gas running 10.80's. I shift at 6200 rpm. With your bigger engine, you could shift a 6000 rpm with out a problem.

Heck, I still don't understand why people don't leave the automatic trannies in Grandma's Impala and run a 5 or 6 speed so they can use the gears to keep the engine in the power range they built it to operate in???????

Originally Posted by nitrowarrior

Buy a police scanner and wait til it's time to get it out on the street and test it.....

Now I like that . That's how I will Test My Monte Carlo . COOL

Originally Posted by Dave Severson

Heck, I still don't understand why people don't leave the automatic trannies in Grandma's Impala and run a 5 or 6 speed so they can use the gears to keep the engine in the power range they built it to operate in???????

What do you have in your Impala ?

ummmm. I drive a Bonneville for a street car, no Impala's in my driveway!!!!

Originally Posted by Dave Severson

ummmm. I drive a Bonneville for a street car, no Impala's in my driveway!!!!

And how many pedals do you have in that car ?

It's a driver, not a hot rod. You want to talk driver's, we'll talk driver's. Just what the heck is your point or you just wanting to start another senseless argument????

My hot rods and my drivers are never the same car.....

Originally Posted by Dave Severson

It's a driver, not a hot rod. You want to talk driver's, we'll talk driver's. Just what the heck is your point or you just wanting to start another senseless argument????

My hot rods and my drivers are never the same car.....

Post #168 is my Point Friend .

Huh????

Again, my driver's are just drivers--Bone stock and untouched. Automatics with A/C and cruise control.

My Hot Rods are usually 5 or 6 speeds, manual trans so I can keep the engine in it's power range.

Why would this be a problem for you???? I commented on a post question concerning stall speeds and camshafts in a Hot Rod saying that I preferred 5 or 6 speeds....... Why would this have anything to do with the fact that my Bonneville is an automatic??? I would like to trade it this summer for a G6 with a 6 speed if that's any consulation.......