Engine choice - Team Camaro Tech
Engine General Engine Discussion.

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old Jun 29th, 19, 10:44 AM Thread Starter
GCS
Tech Team
Greg
 
Join Date: Aug 2015
Location: Shelton,Washington
Posts: 93
Garage
Engine choice

For building a street engine 350-400 hp range I have 2 short blocks available, both 4bolt main. Both rebuildable cores 1) 350 other 400. Is one better than the other. I’ve always used 350’s but wondering about the bigger cubic inches of the 400
GCS is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old Jun 29th, 19, 11:48 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,045
Garage
Re: Engine choice

400 is better hands down.

66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
post #3 of 16 (permalink) Old Jun 29th, 19, 11:50 AM
Senior Tech
kevin
 
Join Date: Mar 2012
Location: virginia
Posts: 3,546
Re: Engine choice

if you want torque, build a 383
flat tire is online now  
 
post #4 of 16 (permalink) Old Jun 29th, 19, 12:01 PM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,045
Garage
Re: Engine choice

Quote:
Originally Posted by flat tire View Post
if you want torque, build a 383
400 is same stoke as 383 but with more cubes. So youre gonna get more torque out of the 400

66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
post #5 of 16 (permalink) Old Jun 29th, 19, 01:31 PM
Moderator
____
 
DOUG G's Avatar
 
Join Date: Mar 1999
Location: Maryland, USA
Posts: 19,225
Garage
Send a message via MSN to DOUG G
Re: Engine choice

400 a factory 4-bolt or machined splayed 4-bolt ?
4-bolt 400 was said to be weaker than the 2-bolt due to meat in the web....I'm not an engineer, so

But, I'm sure with a little block filler, it will be more than fine at the power level you're wanting.

Talk to your machinist/builder

Now, in saying that, I would go 400 all day...

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
DOUG G is offline  
post #6 of 16 (permalink) Old Jun 29th, 19, 02:59 PM
Senior Tech
Dave
 
Join Date: Dec 2005
Location: Tampa, Florida
Posts: 4,587
Re: Engine choice

You are correct Doug. When the newer versions of the 400 were recast they had a thicker main web making the newer two bolt blocks stronger than the earlier four bolt main cap blocks.The '509 is supposed to be the strongest.

Another fun fact about 400 blocks is there is no core shift. With a 350 or any other previous SBC the individual cores were laid into the cope in pairs that could shift around. The 400 was a single core for all eight cylinders.

Big Dave

Last edited by Larger Dave; Jun 29th, 19 at 07:03 PM.
Larger Dave is offline  
post #7 of 16 (permalink) Old Jun 29th, 19, 03:36 PM
Moderator
____
 
DOUG G's Avatar
 
Join Date: Mar 1999
Location: Maryland, USA
Posts: 19,225
Garage
Send a message via MSN to DOUG G
Re: Engine choice

Thanks Dave, been a while

My old 406" had 350 rods, Eagle crank for a 400, and pistons that were for a ? 377 (de-stroked 400) and seen 7500-7800 for the norm at the track (400's aren't rpm motors )
Was low 11's in the 118-119 range.

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
DOUG G is offline  
post #8 of 16 (permalink) Old Jun 29th, 19, 09:58 PM
Team Member
Darin
 
ilikeike's Avatar
 
Join Date: Jun 2013
Location: Stanislaus Co. Ca.
Posts: 1,312
I can’t really think of any reason to build a smaller cubic inch small block over a larger cubic inch one for a a normal type street hot rod.

400++. Go big.

1968 Butternut Coupe,
421" Dart SHP block
TKO 600 RR
Dutchman 9" w/3.70 US Gear Lightning r&p
Speedtech torque arm,Ridetech HQ coilovers
Global West arms
Budnik wheels

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ilikeike is offline  
post #9 of 16 (permalink) Old Jul 1st, 19, 05:06 AM
Senior Tech
Bill
 
Join Date: Dec 2005
Location: Massachusetts
Posts: 1,388
Garage
Re: Engine choice

I seem to remember core shift being a problem on the sbc 400.
arocars is offline  
post #10 of 16 (permalink) Old Jul 1st, 19, 06:17 AM
Super Moderator
Bess-68's rule
 
Everett#2390's Avatar
 
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,555
Garage
Re: Engine choice

For the street, build for torque - it pegs your Seat-O-Pants meter.
The energy used to move an object from a standstill.
Longer stroke, more torque.
You can go to Wallace Racing site and use their formulas for torque/HP as long as you know the weight of the Camaro.
Losing weight is free power, less weight, more acceleration.
Yes, I used a 350 2-bolt +0.020" overbore & PG to push a 2900 lb Camaro to 11.90/115 MPH in the qtr mile.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
'
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - maybe this year, 2019 ...
Everett#2390 is offline  
post #11 of 16 (permalink) Old Jul 1st, 19, 01:11 PM
Senior Tech
Larry
 
Join Date: Apr 2017
Location: Las Vegas NV
Posts: 513
Garage
Re: Engine choice

Getting 1hp per cubic inch is not difficult, so the 350 should easily do it.

On the other hand when you are searching for additional power in an engine adding cubic inches is usually the easiest and safest route to that end.

The 400 will get you to the top of your desired range pretty easily.

I can't complain, but sometimes I still do.
Larry Madsen is offline  
post #12 of 16 (permalink) Old Jul 1st, 19, 02:44 PM
Gold Lifetime Member
Dave
 
Join Date: Jun 2006
Location: Vacaville CA
Posts: 1,348
Re: Engine choice

When my original motor got sick I replaced it with the GM ZZ383/425hp. long block.
flat tire likes this.

Dave

Known to run with scissors....
__________
1969 Camaro Z/28 "clone", GMPP ZZ383, Autogear M22W, Moser 12bolt w/TruTrac 3:73.
Fred Mertz is offline  
post #13 of 16 (permalink) Old Jul 2nd, 19, 07:41 AM Thread Starter
GCS
Tech Team
Greg
 
Join Date: Aug 2015
Location: Shelton,Washington
Posts: 93
Garage
Kinda what I have in mind. Going forged flat top pistons, decent quality aluminum heads ( still investigating which ones) mild hyd roller cam setup. How about intake? Single or dual plane? Have brand new dual. Exhaust already on there, hooker ceramic coated headers with 21/2 “ all way to tailpipes. 3.73 posi diff. & 4speed M20 Plus misc. necessities.
GCS is offline  
post #14 of 16 (permalink) Old Jul 2nd, 19, 07:51 AM
Senior Tech
Ed
 
Join Date: Feb 2018
Location: Wheeling, WV
Posts: 343
Re: Engine choice

Go 400. There's no substitute for cubic inches.
ZEN357 is offline  
post #15 of 16 (permalink) Old Jul 3rd, 19, 05:23 PM
Probationer
Dean
 
Join Date: Sep 2018
Location: Asheville NC
Posts: 5
Re: Engine choice

When I was 17, built a 400 for my 69 SS. Stock bore, stock heads, stock pistons, very mild over stock cam. Elderbrock intake with spread bore ?Holley. All I knew it was a small block...after the build, it wouldnt start....no compression...lol yes used 350 rings. Tore it down in back of a pickup truck. Put it back together and installed in the car same day. I could take off in 3 rd gear and smoke the tires. It lasted until I sold it 4 years later. Had many SB since. It was the most fun I ever had with a camaro. They are factory balanced as well..least externally. You will be pleasantly surprised by the extra performance.
DeanZ10 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro 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 we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










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