BBC guys ... what is it?

[HellinnFrnt]

the guy that built it 12 years ago can't remember for sure he "thinks" it's a 427 hi perf.

head #'s
3964291 Hi Perf  A1472  GM3T (clock thingy pointing at 2 oclock)  has "Trinary 621" stamped on ends of heads
block #'s
3904351  Hi Perf GM1

Weiand 7513 intake

 

[spd500]

The block is a 1967 427  ,could be 2 or 4 bolt main
Heads are : rectangle port, closed chamber, 396, 402, 427, 454, 109cc chambers, Large or small hex spark plugs used, crate motor usage after 1970.

 

[spd500]

That info is from here :
http://www.castingnumbers.info/site/main

 

[Michael Swindoll]

3964291....69-72...rect..CLOSED..396, 402, 427, 454, 109cc chamber, Large or small hex spark plugs used, crate motor usage in years after 1970.

3904351....427.......67......2 or 4 bolt

 

[HellinnFrnt]

ok so it's a  427 corvette hi perf  what kinda comp ratio ya think it's getting with dome pistons ?

 

[duanehydro]

small dome or large dome? think.gif the 39cc dome makes 12 to 1

 

[HellinnFrnt]

I've made me some custom parts for BBC !!!  How many of you guys want to buy them ???  clap.gif




Valve settings were all over the place on intakes 10-21  21-23 on exhaust not so bad. What say you on .016 intake .022 exhaust ? solid flat cam with .600 ish lift  (580-610 with my crappy measuring stick) opinions ? other than pulling the motor to get to the plug to check cam numbers that may or may not be there? 

 

[TintMan]

I have a .638 roller...26 intake 28 exhaust...???

 

[Disturbed]

Comp Cams Xtreme energy solid roller cams have a much tighter clearance than most.  Mine is .016 intake and .018 exhaust. You really need to know the exact cam in order to get it correct.  :smile30:

 

[Becket]

Comp Cams Xtreme energy solid roller cams have a much tighter clearance than most.  Mine is .016 intake and .018 exhaust. You really need to know the exact cam in order to get it correct.  :smile30:

Orrrrr..........Make more Custom BBC parts  :smile14:

 

[ChryslerJet]

I've made me some custom parts for BBC !!!  How many of you guys want to buy them ???  clap.gif




Valve settings were all over the place on intakes 10-21  21-23 on exhaust not so bad. What say you on .016 intake .022 exhaust ? solid flat cam with .600 ish lift  (580-610 with my crappy measuring stick) opinions ? other than pulling the motor to get to the plug to check cam numbers that may or may not be there?

Most people try not to bend push rods maybe that's whats wrong we all need to get bent pushrods oh wait I don't drive a chevy nevermind.

 

[Disturbed]

You're right CJ.  I don't think your keyboard has any chance of throwing a rod or bending a pushrod any time soon.. 

 

[KONA77]

You're right CJ.  I don't think your keyboard has any chance of throwing a rod or bending a pushrod any time soon..

but he might get a cramp in his fingers  :grin:

 

[Michael Swindoll]

You're right CJ.  I don't think your keyboard has any chance of throwing a rod or bending a pushrod any time soon..

but he might get a cramp in his fingers  :grin:

aaahahahahahahahaha...........  :grin: :grin: :grin: thats not nice!  :cheesy: :cheesy: :cheesy: funny as hell though! Motivation brotha! :smile30:

 

[ChryslerJet]

Motivation brotha! :smile30:

Go tit

 

[Crusader]

You're right CJ.  I don't think your keyboard has any chance of throwing a rod or bending a pushrod any time soon.. 

Unless of course, he considers his fingers as pushrods????

 

[Michael Swindoll]

You're right CJ.  I don't think your keyboard has any chance of throwing a rod or bending a pushrod any time soon.. 

Unless of course, he considers his fingers as pushrods????

He might.... You never know! He might set there and move his fingers real fast and make that sound, you know!! vroom...... Vroom....... Vrooooooommmm.....  :grin: :smile30:

 

[duanehydro]

yup, gotta love that small block chrysler jet boat sound we all know and love.  :smile22:

 

[Disturbed]

yup, gotta love that small block chrysler jet boat sound we all know and love.  :smile22:

BWAHAHAHA!

 

[73 Sanger Flat]

I've made me some custom parts for BBC !!!  How many of you guys want to buy them ???  clap.gif




Valve settings were all over the place on intakes 10-21  21-23 on exhaust not so bad. What say you on .016 intake .022 exhaust ? solid flat cam with .600 ish lift  (580-610 with my crappy measuring stick) opinions ? other than pulling the motor to get to the plug to check cam numbers that may or may not be there?

My roller cam wss set 26 and 28.. So I set them cold at 20 and 22 .. That is with an iron block and  aluminum heads ..If you plan on setting them cold , you have to take in consideration what block and heads you have , or set them when the engine is hot .. i believe the aluminum heads and iron block will grow .06 ..