400 sbc hp estimate - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-08-2013, 02:38 PM
Registered User
 
Join Date: May 2013
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
400 sbc hp estimate

i have 400 bored 30,stock crank and rods with claimer pistons,i'm thinkin of going with 280 magnum comp cam and lifter set,double roller timing set,370 64cc chevy heads,roller rockers,weiand team g intake,headers and topping it with holley 750

so i'm shooting for 425 hp but not sure i'll ever reach it i need opinions and suggestions any and all are appreciated thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-08-2013, 03:03 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Quote:
Originally Posted by chevykiid View Post
i have 400 bored 30,stock crank and rods with claimer pistons,i'm thinkin of going with 280 magnum comp cam and lifter set,double roller timing set,370 64cc chevy heads,roller rockers,weiand team g intake,headers and topping it with holley 750
so i'm shooting for 425 hp but not sure i'll ever reach it i need opinions and suggestions any and all are appreciated thanks
Well son, here you are again with a different screen name and another recipe that won't work.

You weighed in yesterday as chevykid1955 with this post....

"i am building a chevy small block 400 and was wondering the hp ratind i could expect, im putting vortech heads with a 2 inch rise and a turbo set up with a 454 tbi fuel injection and a mild cam, and i know to have the steam holes and extra water holes drilled im having a machine shop do that, any idea about horse power and torque? and im pushing 10 lbs of boost"

Here was my reply to you yesterday....

"That's gonna be tough to do with the 64cc Vortec L31 heads. You'll need to build the motor at 7.5:1 static compression ratio in order to use pump gas and I don't know where you're going to get 54cc dished pistons."

Now, you're back on here today as chevykiid with two i's and dropped the 1955, asking about another combo that won't work. Those 64cc iron heads will make 10.8:1 static compression ratio and will never work on pump gas without the motor detonating itself to death. Besides, the tiny little intake runners would be hard pressed to make 300 hp, much less 425.

Rather than coming back tomorrow with another screen name and another unworkable combination of parts, why don't you just tell us exactly what parts you have now and how much money you have to buy new parts. I would want to know the specs on the block and pistons. What is the block deck height? What is the piston deck height? What is the piston crown configuration? If you don't know what I'm talking about here, ask questions. If you're too embarrassed to ask questions on the forum, ask me questions on Private Message by clicking on my screen name.

If we know exactly what you have, then we can offer intelligent answers to help you get where you want to go.

Last edited by techinspector1; 05-08-2013 at 03:09 PM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-08-2013, 03:18 PM
Registered User
 
Join Date: May 2013
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
no disrespect sir but i'm sorry you mistaking me for someone else i've never used this before
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-09-2013, 11:56 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,639
Wiki Edits: 0

Thanks: 364
Thanked 858 Times in 820 Posts
400 ci with 10.8:1

Quote:
Originally Posted by chevykiid View Post
no disrespect sir but i'm sorry you mistaking me for someone else i've never used this before
Tech is one of the best engine combination gurus here.His street engines are very well planned.I hope you show him the respect he deserves and listen to his plans. If you can prove him wrong then you dont need any help at all
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-09-2013, 02:48 PM
Registered
 
Join Date: Apr 2013
Location: Burlington, IA
Posts: 39
Wiki Edits: 0

Thanks: 2
Thanked 6 Times in 6 Posts
Im not one to get in the middle of things but I agree. Learning things is what all of these forums are about and im going to tell ya something. This forum is crazy with information about building really ****** autos. From what ive noticed starting with the first day the guys on this site know tons and tons of useful info. I found this forum througj a search for a grille and im glad I did. They are full of knowledge with being smart and have centuries of experience with autos and life in general. Its to close of a time frame posting a topic that mimics itself to believe otherwise. Like said if not prove its different and yoir a different person. If your afraid of looking dumb trust me they wont bust your balls. If they see something wrong theyll tell you their opinions, thats the whole point of asking for help. Think of it like being at a show meet or hangout and there being 15 guys hanging around bullsh..ting about anything and everything.

These guys know what they doing and yes I myself feel like an idiot most of the time being on here and reading threads after threads but its really cool because im learning. Ive asked some of the dumbest things.....to them but its lwgitly something that I didnt get per say but I knew by asking I would get really good and helpful info. If your worried about looking dumb be a fly on the wall here and read through the threads first and research.

Ive always stayed away from metal, I dont really enjoy working with it but seeing and reading about what these guys are working with and building with metal and their imagination the first opportunity im able to buy some supplies im going to learn how to work with metal. I glass but they are some things that fiber/carbonglass doesnt work for and I always had someone else or a shop do it but the short period of being on this forum has inspired me to learn how to do that myself as well.

I guess what im trying to say is dont be a nutty person on here youll only get bad replies and from what ive picked up if you want drama or want to start it go to this forum known as the HAMB.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-09-2013, 03:00 PM
Registered User
 
Join Date: May 2013
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
thanks for he advice and yes i have convinced tech that i'm a different guy and have already figured out hes the real deal and knows what hes talkin bout he has helped me a ton so far and i'll take all the help i can get thanks guys
Reply With Quote Quick reply to this message
The Following User Says Thank You to chevykiid For This Useful Post:
vinniekq2 (05-09-2013)
  #7 (permalink)  
Old 05-09-2013, 06:52 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Turns out the OP has a 400 block with Keith Black Claimer hypers, part number H3416, about 5cc's of eyebrow, hung on 5.565" rods. First entry on this page....
Chevy 400's
I'm telling him that he will have to use a minimum 76cc head with the 5cc pistons to prevent excessive static compression ratio with an iron head. He has some 882 heads and if we call them 78cc, we arrive at a 9.9:1 static compression ratio. If we zero deck the block to the stack and use a 0.040" gasket and drill the heads for steam holes and use a Crane hydraulic flat tappet cam #113531 and follow these instructions for installing a flat tappet camshaft and keep our fingers crossed, this could work.
http://www.summitracing.com/parts/crn-113531
http://www.crankshaftcoalition.com/w...ips_and_tricks

Here's how to drill the heads for steam holes.
Technical Articles at Greg's Engine & Machine
Be sure to use only a 400 head gasket that has steam holes in the gasket to match the steam holes in the block and heads.

I played around with this mess and finally came across what I think would be a pretty good combo using the 882 heads, zero deck and 5cc claimer pistons, Edelbrock Performer RPM intake manifold mounting a 600 CFM, vacuum secondaries carb, long-tube headers through the mufflers, a 9.9:1 static compression ratio and a 0.039" squish as a result of a zero deck and this head gasket.....
http://www.summitracing.com/parts/fe...make/chevrolet

Camshaft was installed retarded by 4 degrees on these 0.050" numbers.....
IO (3)
IC (41)
EO (46)
EC (4)

RPM....HP....TQ
1500...113...400
2000...165...433
2500...207...435
3000...261...457
3500...316...474
4000...363...475
4500...397...463
5000...410...431
5500...369...352

BMEP 179.1 lbs @4000 rpm's
Heads are stalled after 5000.

Should be a pretty good street motor, using a pretty healthy cam. Any of you guys who have a 400 block, crank and 5.565" rods might take note of how this combination works with KB claimer pistons, 5cc crowns, part number H3416. They're 1.565" on the compression height, so with a 5.565" rod and 1.875" stroke radius, the stack measures 9.005". With the block being a theoretical 9.025" block deck height, you will have to cut only 0.020" off the decks to achieve zero deck.

Last edited by techinspector1; 05-09-2013 at 07:09 PM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-09-2013, 07:13 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,639
Wiki Edits: 0

Thanks: 364
Thanked 858 Times in 820 Posts
I would love that engine in my bull dozer
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-09-2013, 09:52 PM
Registered User
 
Join Date: May 2013
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
400 sbc

And just in case anybody's wondering this is going in a 85 camaro sport
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-10-2013, 04:08 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,800
Wiki Edits: 0

Thanks: 48
Thanked 603 Times in 540 Posts
Quote:
Originally Posted by chevykiid View Post
And just in case anybody's wondering this is going in a 85 camaro sport
What are you going to use for a rear axle?.... because a decent 400 will explode the stock 7.5" peewee 10 bolt that is stock in these cars(even the Z28) - in the blink of an eye.

I'm not kidding at all
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-10-2013, 04:24 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Quote:
Originally Posted by ericnova72 View Post
What are you going to use for a rear axle?.... because a decent 400 will explode the stock 7.5" peewee 10 bolt that is stock in these cars(even the Z28) - in the blink of an eye.
I'm not kidding at all
Eric is right. You need to begin looking at options that will hold the torque of the motor without tearing all the teeth off the gears. I would look for an 8.5", 12-bolt that would fit into the car on the rear suspension that's in there now.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 05-10-2013, 05:00 PM
Registered User
 
Join Date: May 2013
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
400 sbc

Would a rearend out of a 67 camaro work?
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 05-10-2013, 05:10 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Quote:
Originally Posted by chevykiid View Post
Would a rearend out of a 67 camaro work?
Count the number of bolts holding the rear cover on. 12 bolts will work, 10 bolts will not.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 05-10-2013, 05:17 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 48
Posts: 9,800
Wiki Edits: 0

Thanks: 48
Thanked 603 Times in 540 Posts
Quote:
Originally Posted by chevykiid View Post
Would a rearend out of a 67 camaro work?
Not without a ton of modificaton.

The '67 Camaro is a leaf spring rear, the '85 Camaro is 2 lower links, a panhard locater, and a long 3rd link/torque arm that attaches to the nose of the rear end and the rear of the transmission mount/case.

The only bolt-in solution for '82-up Camaro is an aftermarket 12-Bolt, Dana 60 or 9" Ford from companies like Currie Enterprises, Moser Industries, Quick Performance or Strange Engineering...rather pricey. Quick Perf is about the most reasonable price-wise.

The stock rear suspension style and weak stock rear end are the biggest problems to overcome with the '82-up Camaro/Firebird design. GM didn't do these cars right at all.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 05-10-2013, 05:44 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
I'll bet that with a little planning aforethought, a fellow could adapt and bolt the leaf springs into the car and use the '67 diff.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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 for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sbc 355 Horsepower Estimate.... VARS_85MONTE Hotrodding Basics 2 01-24-2012 06:19 AM
sbc hp estimate please??? 89camaro355 Hotrodding Basics 1 06-16-2011 11:09 PM
SBC Horsepower/TQ Estimate Please Hanks56Chevy Hotrodding Basics 7 09-29-2010 09:42 AM
HP Torque estimate on this 406 SBC longrange3000 Engine 14 08-19-2010 09:50 PM
Opinions/hp estimate on this 350 sbc? kane583 Hotrodding Basics 23 03-15-2005 10:58 PM


All times are GMT -6. The time now is 11:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.