Help - BBC 396 - 440 Stroker Street Build - Chevelle Tech
Engine General Engine Discussion.

 23Likes
Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 52 (permalink) Old Feb 26th, 20, 10:23 PM Thread Starter
 
Join Date: Feb 2020
Posts: 8
Help - BBC 396 - 440 Stroker Street Build

Hey

I am putting together a 396 +.090 (4.185" bore) 4.00" stroke, 440ci engine for my 1969 chevelle. This is a street only engine, hydro brakes, manual transmission

So far, I have the block freshly machined and a box of O.E engine parts that came off the 1969 motor.

My goal is to get to 500hp N/A, without spinning the motor to 8k rpm


I am looking for suggestions on:

aluminum Head brand and combustion chamber size

Cam profile and duration

Compression ratio and piston dome cc


I know I will have more questions to come, Thank you in advance!
satx_675 is offline  
Sponsored Links
Advertisement
 
post #2 of 52 (permalink) Old Feb 27th, 20, 7:11 AM
Tech Team
Bob
 
Join Date: Jan 2019
Location: Atl
Posts: 97
Re: Help - BBC 396 - 440 Stroker Street Build

Edelbrock and others have 110cc heads that combine with about 22cc dome pistons that would make about 10.0-1 compression ratio depending on gasket thickness and bore notch. what style lifter are you planning?
pbcbob is offline  
post #3 of 52 (permalink) Old Feb 27th, 20, 7:35 AM
Senior Tech Team
 
Join Date: Dec 2005
Location: Lancaster, PA
Posts: 11,087
Re: Help - BBC 396 - 440 Stroker Street Build

I am guessing you are going to have a set of pistons made for it. So based on that, pick a cylinder head and then just have the piston made to match that. And then the cam will be based on the flow characteristics of the head.
71454Chevelle likes this.

Ray


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Best pass 8.87 at 150.98 1.212 60'. Sold 3/2018

1970 SS 396 project in progress. Bought 5/2018
bracketchev1221 is offline  
 
post #4 of 52 (permalink) Old Feb 27th, 20, 8:21 AM
Senior Tech Team
jeff
 
Join Date: Jan 2008
Location: yukon ok.
Posts: 5,072
Re: Help - BBC 396 - 440 Stroker Street Build

The 396 is not that hard to get 500HP from.
Read this.
Chevrolet 396 Big Block - Super Chevy Magazine

And this may also help.
https://www.chevelles.com/forums/13-...ke-500-hp.html

If you have the 1969 oval port heads and know how to port heads a little I would use them.
427L88 likes this.
jeff swisher is offline  
post #5 of 52 (permalink) Old Feb 27th, 20, 3:11 PM
Tech Team
 
Join Date: Feb 2019
Posts: 897
Re: Help - BBC 396 - 440 Stroker Street Build

Here is something I helped a kid with in the late 80's He had a real nice 68 Chevelle SS 396 4 speed car that ran 14.40'[email protected] and he wanted to go faster than the fox body guys back then as they would beat him. I tole the kid we need to do some new heads and a very mild cam. So he went with the 350hp 396 cam and after some persuasion he reluctantly did a set of Peanut Port heads. I told him I would but the heads from him if the did not perform well, so that was enough to try them. The heads only had the 2.19 and 1.72 exhaust valves, no porting and with a performer intake and his stock Q-jet the car ran [email protected] Needless to say he was very happy. He never told his buddies with other 396 cars what he used for heads and he always beat them. Besides would you put a 265cc head on a 400 SBC? of course not, then why would you do that to a lesser 396 BBC.
the heckler likes this.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
68Chevele is offline  
post #6 of 52 (permalink) Old Feb 28th, 20, 12:38 AM
Lifetime Premium Member
Chris
 
Join Date: Oct 2005
Location: Wichita Falls,TEXAS
Posts: 3,256
Garage
Re: Help - BBC 396 - 440 Stroker Street Build

Why would you spend the money on an odd displacement stroker instead of building a 454 based stroker?

1967 Chevelle 496BB/TH400/Strange S-60 (Show and Go)
1967 El Camino 388SB/700R4/12-bolt posi (Rat Muscle Parts Hauler)
2015 Harley Davidson Road Glide Special (Cruiser)
2007 Harley Davidson Road King Custom (Bar Hopper)
2018 Chevy Silverado LTZ Duramax (Daily Driver)



My Chevelle:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



C & D Performance

North Texas Chevelles
Motorhead62 is offline  
post #7 of 52 (permalink) Old Feb 28th, 20, 6:52 AM
Senior Tech Team
 
Join Date: Dec 2004
Location: tucson az
Posts: 14,182
Send a message via AIM to Jim Mac
Re: Help - BBC 396 - 440 Stroker Street Build

Quote:
Originally Posted by Motorhead62 View Post
Why would you spend the money on an odd displacement stroker instead of building a 454 based stroker?
isnt this just a .090 block with a 454 crank?

Jim

70 chevelle, SS clone 454 4 speed
71 camaro. (owned since 1978!) 6-71 blown small block 400
66 chevelle 350 4 speed 3.55 12 bolt
66 el camino 350 th350 parts hauler
Jim Mac is offline  
post #8 of 52 (permalink) Old Feb 28th, 20, 7:26 AM
Senior Tech Team
 
Join Date: Dec 1998
Location: Lubbock, TX
Posts: 4,403
Re: Help - BBC 396 - 440 Stroker Street Build

Quote:
Originally Posted by Motorhead62 View Post
Why would you spend the money on an odd displacement stroker instead of building a 454 based stroker?

'69, no 454 blocks yet, the purists will find it and harass the owner for not staying "original".


Unless it's a top shelf concours type car, I'd tell the purists to pound sand and I'd drop a 496 or 505 stroker in 'er.

Gary Adrian
Organized people are just too lazy to look for their stuff...
Busted Knuckles is offline  
post #9 of 52 (permalink) Old Feb 28th, 20, 7:38 AM
Senior Tech Team
 
Join Date: Aug 2018
Posts: 1,391
You’ll get more gross HP,
stroking your 396
but you’ll get the HP at the
expense of a slower revving engine.
Reelysalty is offline  
post #10 of 52 (permalink) Old Feb 28th, 20, 8:05 AM
Senior Tech Team
 
Join Date: Dec 2005
Location: Lancaster, PA
Posts: 11,087
Re: Help - BBC 396 - 440 Stroker Street Build

Quote:
Originally Posted by Reelysalty View Post
You’ll get more gross HP,
stroking your 396
but you’ll get the HP at the
expense of a slower revving engine.
How much slower? Enough to time it?

Ray


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Best pass 8.87 at 150.98 1.212 60'. Sold 3/2018

1970 SS 396 project in progress. Bought 5/2018
bracketchev1221 is offline  
post #11 of 52 (permalink) Old Feb 28th, 20, 8:51 AM
Senior Tech Team
 
Join Date: Mar 2004
Location: Shippensburg, PA
Posts: 4,745
Re: Help - BBC 396 - 440 Stroker Street Build

Quote:
Originally Posted by 68Chevele View Post
Here is something I helped a kid with in the late 80's He had a real nice 68 Chevelle SS 396 4 speed car that ran 14.40'[email protected] and he wanted to go faster than the fox body guys back then as they would beat him. I tole the kid we need to do some new heads and a very mild cam. So he went with the 350hp 396 cam and after some persuasion he reluctantly did a set of Peanut Port heads. I told him I would but the heads from him if the did not perform well, so that was enough to try them. The heads only had the 2.19 and 1.72 exhaust valves, no porting and with a performer intake and his stock Q-jet the car ran [email protected] Needless to say he was very happy. He never told his buddies with other 396 cars what he used for heads and he always beat them. Besides would you put a 265cc head on a 400 SBC? of course not, then why would you do that to a lesser 396 BBC.
What kind of Compression ratio did it have? Weren't peanut ports all 119cc? That's running pretty good for an old-tech 350hp factory cam.
novadude is offline  
post #12 of 52 (permalink) Old Feb 28th, 20, 9:21 AM
Gold Member
Gene
 
Join Date: Sep 2000
Location: Buffalo NY
Posts: 15,020
Re: Help - BBC 396 - 440 Stroker Street Build

satx 675, dont waste too much money on alloy heads as your bore size and ci wont work them well at all. oem 781 are likely your best choice or RR-ovals in iron if you have no heads. In fact, this may be the application where the shrouded ( for a 4.25" X4") old closed chambers work OK. Small combustion chamber = compression. And they're barely shrouded for a 396.

Anywhere near 500 is going to require a roller cam imho, PROPERLY matched to your heads. To me, that is the "system" you ought be entirely focused on. In fact, you might get ahold of a pro, like Straub or Foxwell if they dont chime in here, and see which head/cam combo might shine for a small bore low displacement rat.

Gene
ACES 3112/Team Chevelle Gold #62
Be big, be a 'builder'!
427L88 is offline  
post #13 of 52 (permalink) Old Feb 28th, 20, 9:25 AM
Senior Tech Team
 
Join Date: Aug 2018
Posts: 1,391
Quote:
Originally Posted by bracketchev1221 View Post
Quote:
Originally Posted by Reelysalty View Post
You’ll get more gross HP,
stroking your 396
but you’ll get the HP at the
expense of a slower revving engine.
How much slower? Enough to time it?
Short stroke also produces more HP...faster.
Reelysalty is offline  
post #14 of 52 (permalink) Old Feb 28th, 20, 11:10 AM
Tech Team
 
Join Date: Aug 2005
Location: KY
Posts: 943
Re: Help - BBC 396 - 440 Stroker Street Build

Quote:
Originally Posted by Reelysalty View Post
Short stroke also produces more HP...faster.
Could you explain how the short stroke does that?
sleeper is offline  
post #15 of 52 (permalink) Old Feb 28th, 20, 11:25 AM
Gold Member
Gene
 
Join Date: Sep 2000
Location: Buffalo NY
Posts: 15,020
Re: Help - BBC 396 - 440 Stroker Street Build

My short stroke 3.76" made maybe 510 @68 00, my 4" makes [email protected] w/ smaller cam.. That's how!

The key here is cylinder filling that small bore and short stroke. No HP gains here, its a hinderance you have to design around. You'll need a ton of ram effect and "port-torque" from the valve event timing/port config to support any decent HP under 7000 rpm.

Gene
ACES 3112/Team Chevelle Gold #62
Be big, be a 'builder'!
427L88 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome