Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Chevrolet > Chevrolet Classics
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools Search this Thread
Old 02-26-2011, 07:23 PM   #1
chevyking72
AF Newbie
 
Join Date: Feb 2011
Location: orlando, Florida
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
409 sbc build

well I'm building a sbc 409 and would like some input on what to expect with my build. I started with a 400 cid block bored it .40 over and used the stock crank and purchased keith blck floating hyp pistons along with scats 3.75 rods also floating, Im using the Edelbrock rpm air gap intake along with the edelbrock 60999 aluminum heads. I plan on using the holley 750 mechanicle carb. every bolt was replaced with arp bolts etc. what can i expect to make as far as torq and hp.
chevyking72 is offline   Reply With Quote
Old 02-27-2011, 01:34 AM   #2
CivRacer95
srs biznis
 
CivRacer95's Avatar
 
Join Date: Sep 2004
Location: Location, Location
Posts: 3,658
Thanks: 6
Thanked 2 Times in 2 Posts
Send a message via AIM to CivRacer95
Re: 409 sbc build

Not exactly my expertise here, so I'll move it to the Chevy section and let those gearheads give you a hand with your questions

*Edit: Moved to this section because I had no idea where to put it exactly. Sorry to the Chevy mods, figured you would be able to take it from here!
__________________
AF Guidelines. Read and play nicely :
Just Click Here!



CivRacer95 is offline   Reply With Quote
Old 02-27-2011, 09:47 AM   #3
534BC
AF Enthusiast
 
Join Date: Jan 2006
Location: Babylon
Posts: 946
Thanks: 0
Thanked 1 Time in 1 Post
Re: 409 sbc build

Welcome to AF forums.

HP is directly calc with VE and rpm since you have already listed the displacement.
VE can be estimated maybe 70-80% and then calc at whatever rpm you desire.

It mostly determined by your camshaft and heads selection. sorry I can't be specific. 400-500 HP maybe? I'm sure there are online calcs that'll help more.
534BC is offline   Reply With Quote
Old 02-27-2011, 11:07 AM   #4
777stickman
AF Enthusiast
 
Join Date: Jan 2004
Location: Maybe, California
Posts: 1,852
Thanks: 6
Thanked 90 Times in 89 Posts
Re: 409 sbc build

SummitRacing.com has a bunch of calculator sites. You might also take a look at the carb sizing calculator as that 750 may be a bit too much for your application.
__________________
57 Chevy 210
65 Olds 442 Convertible (Another one sold)
75 GMC Vandura 3/4 Ton
1999 K2500 Old Body Style Suburban (Gone but not forgotten)
05 Dodge Ram 3500/5.9 Cummins
2012 Toyota FJ Cruiser
777stickman is offline   Reply With Quote
Old 03-01-2011, 08:34 AM   #5
chevyking72
AF Newbie
Thread starter
 
Join Date: Feb 2011
Location: orlando, Florida
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Red face Re: 409 sbc build

Quote:
Originally Posted by 777stickman View Post
SummitRacing.com has a bunch of calculator sites. You might also take a look at the carb sizing calculator as that 750 may be a bit too much for your application.
I'm using the comp cam magnum 292h cam and lifter kit sorry I left that out. Also using summits online calculator kinda confused me and I'm not sure I put in the correct info
chevyking72 is offline   Reply With Quote
Old 03-02-2011, 09:17 AM   #6
MrPbody
AF -Advisor
 
Join Date: Feb 2004
Location: Chesterfield, Virginia
Posts: 2,549
Thanks: 0
Thanked 6 Times in 5 Posts
Re: 409 sbc build

Well, without a cam spec, we're gonna be "lost" for power.

Avoid the KB hyper-eutectic pistons. They've been "problematic" since their introduction in the mid '90s. Setting them "up" to work AND live is not trivial. Speed Pro are good forgings and reasonably priced. The Icon (fka Kieth Black) forgings are also very good and reasonable.

I would also suggest Eagle rods versus the Scat. We've seen metalurgical issues with the Scats. What is a 3.75 rod? For the "safest" 400 build, a 6" rod is called for.

The factory crank is fine. In fact, better than ANY of the aftermarket castings. Just be sure the grind is done by a good crank shop.

I hope that block is a "2-bolt". 4-bolt 400s are very weak in the bulkheads, where they removed material in the WRONG places for the outboard bolt holes. Unlike 350, a 2-bolt is a better block. If power levels reach the point where 4-bolt is needed, "splayed bolt" caps are called for. Once you go past about 550 HP, I would highly recommend an aftermarket block, like "Little M". Unlike 350, with 400, the block is the "weak link".

FWIW

Jim
MrPbody is offline   Reply With Quote
Old 03-02-2011, 01:05 PM   #7
chevyking72
AF Newbie
Thread starter
 
Join Date: Feb 2011
Location: orlando, Florida
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Re: 409 sbc build

Good information! The only thing is the machine work and assembly of motor is complete. So I'm just wanting to know should I sale this and rebuild or for street cruising I'm fine.
chevyking72 is offline   Reply With Quote
Old 05-13-2012, 01:51 PM   #8
techinspector1
AF Newbie
 
techinspector1's Avatar
 
Join Date: May 2012
Location: Hemet, California
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Re: 409 sbc build

Quote:
Originally Posted by chevyking72 View Post
I'm using the comp cam magnum 292h cam and lifter kit sorry I left that out. Also using summits online calculator kinda confused me and I'm not sure I put in the correct info
I would never use this much cam for a street cruiser. What's the static compression ratio of the motor. You cannot intelligently choose a camshaft for a motor until you know the exact static compression ratio.
http://www.cranecams.com/faqview.php?s_id=9
techinspector1 is offline   Reply With Quote
Old 05-13-2012, 07:34 PM   #9
maxwedge
A990 racer
 
Join Date: Mar 2002
Location: Chestertown, New York
Posts: 16,589
Thanks: 14
Thanked 325 Times in 319 Posts
Thumbs up Re: 409 sbc build

Quote:
Originally Posted by techinspector1 View Post
I would never use this much cam for a street cruiser. What's the static compression ratio of the motor. You cannot intelligently choose a camshaft for a motor until you know the exact static compression ratio.
http://www.cranecams.com/faqview.php?s_id=9
Agreed, that cam would need a big convertor and gear to work and at least 10:1 with the alloy heads, I believe the 3.75 rods refers to the stroke? Forget vacuum for the p/brakes also.
__________________
maxwedge is offline   Reply With Quote
Old 05-13-2012, 09:39 PM   #10
oldblu65
AF Fanatic
 
oldblu65's Avatar
 
Join Date: Jan 2006
Location: " The Scenic City "
Posts: 6,127
Thanks: 6
Thanked 58 Times in 57 Posts
Re: 409 sbc build

Anyone wanting advice on a Chevy 409 build should contact Lamar or Rob Walden @ http://www.worldcastings.com/ or by calling 770-449-0315 . They are the premier builders of 409's in the country and can get you going in the right direction with your build . I am not connected in any way with this company - just know it by their reputation ! They are located in Doraville , Ga. !
__________________
" Sometimes I grow so tired "
oldblu65 is offline   Reply With Quote
Old 05-14-2012, 07:45 PM   #11
maxwedge
A990 racer
 
Join Date: Mar 2002
Location: Chestertown, New York
Posts: 16,589
Thanks: 14
Thanked 325 Times in 319 Posts
Smile Re: 409 sbc build

Quote:
Originally Posted by oldblu65 View Post
Anyone wanting advice on a Chevy 409 build should contact Lamar or Rob Walden @ http://www.worldcastings.com/ or by calling 770-449-0315 . They are the premier builders of 409's in the country and can get you going in the right direction with your build . I am not connected in any way with this company - just know it by their reputation ! They are located in Doraville , Ga. !
"Old", he is referring to a 409 cu. in. small block not the W engine 409.
__________________
maxwedge is offline   Reply With Quote
Old 05-14-2012, 09:26 PM   #12
oldblu65
AF Fanatic
 
oldblu65's Avatar
 
Join Date: Jan 2006
Location: " The Scenic City "
Posts: 6,127
Thanks: 6
Thanked 58 Times in 57 Posts
Re: 409 sbc build

Quote:
Originally Posted by maxwedge View Post
"Old", he is referring to a 409 cu. in. small block not the W engine 409.
I apparently missed the " SBC " part of the thread ? Sorry , guys !
__________________
" Sometimes I grow so tired "
oldblu65 is offline   Reply With Quote
 
Similar Threads
Thread Thread Starter Forum Replies Last Post
Building a new 385ci SBC for my 1991 Z28 1986Z28 COMPLETELY off-topic 6 06-01-2010 08:31 AM
Help: Tips and Tricks to building a good tuner car for drifting Steviodaddio Drifting 8 12-19-2008 02:19 AM
need opinions on a sbc build jason-1995fbody General Discussion 3 04-26-2007 10:36 PM
1963 Chevrolet Impala 409/425 Convertable. trdaggers Impala | Impala SS 1 05-22-2004 01:26 PM

Reply

POST REPLY TO THIS THREAD


Bookmarks
Go Back   Automotive Forums .com Car Chat > Chevrolet > Chevrolet Classics

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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



All times are GMT -5. The time now is 08:46 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts