Chevy 454 Big Block - Chevelle Tech
Chevelle Tech join team chevelle as a supporting member  
Chevelle Parts at SS396.com      
GROUND UP & SS396.com         
Official Sponsor of Team Chevelle
     

Auto Insurance

Chevelles.com is the premier Chevrolet Chevelle Forum on the internet. Registered Users do not see the above ads.
Engine AdvertisementGeneral Engine Discussion.

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old May 23rd, 06, 12:43 AM
spaceace77084 spaceace77084 is offline
Tech Team
George
 
Join Date: Dec 2005
Location: San Antonio, Texas
Posts: 468
Default Chevy 454 Big Block

Please tell me if it is a good idea to overhaul a 454 that originally came out of a truck and put into a 70 Chevelle?? I'm making a SS 454 clone. Would I get some good power from it? What set up would work best for a weekend driver sometimes drag strip car???

I plan on boring it out 30 over and putting a steel crank, anything I should know about pros and cons??

Any help would be great.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old May 23rd, 06, 4:23 AM
71nomad 71nomad is offline
Tech Team
 
Join Date: Nov 2005
Location: Alamogordo, NM or Holloman AFB, NM
Posts: 113
Send a message via AIM to 71nomad
Default Re: Chevy 454 Big Block

im also building a 454 engine in my 71. im pretty sure truck blocks are taller so you may have some clearence issues. im using a popular 454 car engine casting # 361959 production years 73-90 a car style oil pan and a non raised intake. 454's can produce a lot of power with the right parts. .030 bore is a good bore to start, because you will have plenty of room to bore it again if you want. 454's can be bored to .110 over, i belive. a good bore, a good set of OVAL PORT cylinder heads with a valve job. roller rockers, 3/8 push rods, a nice forged steel crank, dome style pistons with strong steel rods. a good cam shaft to match your compresstion which should be close to 10:1 by now, with the above parts. a nice big block high flow intake. with a high flow holley carbto match. and a quality ignition system with probally get you over 500hp and around the same amount of torque. im doing pretty much the same thing to my 454 and im estimationg around 530whp. i'll probally be contradicted after this post but im planning all this for me. this is my first engine build and im not fimiliar with the process and the product yet so i do welcome it. hope i helped.
Reply With Quote Quick reply to this message
  #3  
Old May 23rd, 06, 5:25 AM
Busted Knuckles Busted Knuckles is offline
Senior Tech Team
 
Join Date: Dec 1998
Location: Lubbock, TX
Posts: 3,459
Default Re: Chevy 454 Big Block

Post the casting number off of the driver's side ledge on the back of the block - that'll help identify it as either a tall deck (a.k.a. pain in the butt) or passenger car block. Unless it came out of a big truck or bus, it's probably a standard deck height block. I've pulled quite a few out of pickups and 1-ton trucks and they've all been standard deck blocks.
__________________
Gary Adrian
FCS Harmony Racing

'Cause if they catch you in the back seat trying to pick her locks,
They're gonna send you back to mother in a cardboard box...
You better run!
Reply With Quote Quick reply to this message
  #4  
Old May 23rd, 06, 6:39 AM
Hal_396 Hal_396 is offline
Tech Team
 
Join Date: Aug 2002
Location: Center Point, Iowa
Posts: 398
Default Re: Chevy 454 Big Block

I thought the tall deck blocks were only 366 and 427 truck motors. I don't think the 454 ever came as a tall block.
Reply With Quote Quick reply to this message
  #5  
Old May 23rd, 06, 6:44 AM
mr 4 speed mr 4 speed is offline
Lifetime Premium Member
 
Join Date: May 1999
Location: Under the hood of some musclecar
Posts: 22,885
Default Re: Chevy 454 Big Block

Quote:
Originally Posted by Hal_396
I thought the tall deck blocks were only 366 and 427 truck motors. I don't think the 454 ever came as a tall block.
that is absolutley correct.
No such thing as a tall deck truck 454
Reply With Quote Quick reply to this message
  #6  
Old May 23rd, 06, 7:00 AM
-SS454- -SS454- is offline
Senior Tech Team
Chris
 
Join Date: Aug 2002
Location: Alberta, Canada
Posts: 3,527
Default Re: Chevy 454 Big Block

71nomad, whats ur parts list in which u expect to get 530 rwhp from?
Reply With Quote Quick reply to this message
  #7  
Old May 23rd, 06, 8:16 AM
71nomad 71nomad is offline
Tech Team
 
Join Date: Nov 2005
Location: Alamogordo, NM or Holloman AFB, NM
Posts: 113
Send a message via AIM to 71nomad
Default Re: Chevy 454 Big Block

781 heads 2.19 1.88 valve job, .030 bore with dome pistons, 10.5:1 compresstion 282 cam shaft with 3/8 rods with an edelbrock air gap intake and a 750cfm dp holley carb. with i guess some tweaks hear and there for a little more power. do you think i can get that with all these things or maybe a little extra stuff on it or other part combinations "SS454"?
Reply With Quote Quick reply to this message
  #8  
Old May 23rd, 06, 8:27 AM
jmeek66 jmeek66 is offline
Tech Team
 
Join Date: Mar 2006
Posts: 123
Default Re: Chevy 454 Big Block

IMHO for that kind of HP at the rear wheels with that setup that thinking might be a little ambitious. I have a similar setup excluding your over 10 to 1 compression (mine is 9.5 to 1) with same heads and valves. I'm running a fairly agressive street 268 voodoo cam and although I have not dyno'd it. Software dyno places my setup at around 475-490 hp on just motor. I'm hopefull for around 350 or so at the rear wheels HO wise. However, either way, you should have a real torque monster running those ovals!
__________________
66 Chevelle - 468 200-4R 4.10s - black on red
Reply With Quote Quick reply to this message
  #9  
Old May 23rd, 06, 8:54 AM
-SS454- -SS454- is offline
Senior Tech Team
Chris
 
Join Date: Aug 2002
Location: Alberta, Canada
Posts: 3,527
Default Re: Chevy 454 Big Block

71nomad, for sure you wont get 530 rwhp with that combo. 530 rwhp is like 675 hp at the crank, and you need a very stout 454 to get 675 hp N/A. Sounds like a nice reliable engine that should make very strong power over the entire torque curve. I think jmeek66's post says it correctly. I think you may want to drop the compression down to about 10:1 tops though. 10.5 with iron heads and a 282 cam might see some detonation on pump gas. If its primarily a street engine, i think building it to run on pump gas all day, even in hot weather, with optimal timing is a better approach.
Reply With Quote Quick reply to this message
  #10  
Old May 23rd, 06, 12:47 PM
spaceace77084 spaceace77084 is offline
Tech Team
George
 
Join Date: Dec 2005
Location: San Antonio, Texas
Posts: 468
Default Re: Chevy 454 Big Block

Thanks for all the help. I'll post the engine code when I get back to my brother's house. We are doing it at his house.

I plan on ONLY running regular gas on this car. I'm not planning to run any kind of special fuel.


One more question. Would it be a good engine to rebuild if it was a 2 bolt main as apposed to a 4 bolt main??
Reply With Quote Quick reply to this message
  #11  
Old May 23rd, 06, 1:04 PM
Busted Knuckles Busted Knuckles is offline
Senior Tech Team
 
Join Date: Dec 1998
Location: Lubbock, TX
Posts: 3,459
Default Re: Chevy 454 Big Block

2 vs 4 bolts - naturally aspirated, mind you - has more to do with RPMs than horsepower. 4-bolt caps help prevent cap walk and do make a stiffer bottom end for high winding engines than anything else. Most folks will tell you that there's only about 50 - 100 hp difference between capabilities of each. If you really need a 4-bolt block, drop the additional coin and get an aftermarket block. Then you can go bug$hit crazy with a build and not have to worry about it. Big stroke, big bore, big huffer, big shot - big-inch engines are where it's at, IMHO. Whether or not the block will hold up will be the least of your worries
__________________
Gary Adrian
FCS Harmony Racing

'Cause if they catch you in the back seat trying to pick her locks,
They're gonna send you back to mother in a cardboard box...
You better run!
Reply With Quote Quick reply to this message
  #12  
Old May 23rd, 06, 1:15 PM
spaceace77084 spaceace77084 is offline
Tech Team
George
 
Join Date: Dec 2005
Location: San Antonio, Texas
Posts: 468
Default Re: Chevy 454 Big Block

Quote:
Originally Posted by mr 4 speed
that is absolutley correct.
No such thing as a tall deck truck 454


So then if it is not a tall deck engine, it should fit fine in a 70 chevelle?
Reply With Quote Quick reply to this message
  #13  
Old May 23rd, 06, 4:36 PM
Hal_396 Hal_396 is offline
Tech Team
 
Join Date: Aug 2002
Location: Center Point, Iowa
Posts: 398
Default Re: Chevy 454 Big Block

Yes, it will fit. If the 70 had an original 307 motor then you'll have to change the frame mounts I believe. If it had a 350 you should be OK.
Reply With Quote Quick reply to this message
  #14  
Old May 23rd, 06, 4:54 PM
71nomad 71nomad is offline
Tech Team
 
Join Date: Nov 2005
Location: Alamogordo, NM or Holloman AFB, NM
Posts: 113
Send a message via AIM to 71nomad
Default Re: Chevy 454 Big Block

wow i didn't think that much power was lost between the crank and the rear wheels. im a little disappointed. because i thought i was going to get at least 450hp to the wheels. i know i was shooting a little high with 530hp. but that kind of sucks. anyway, thanks guys!

Last edited by 71nomad; May 23rd, 06 at 5:11 PM.
Reply With Quote Quick reply to this message
  #15  
Old May 23rd, 06, 9:59 PM
Johnny O Johnny O is offline
Team Member
John
 
Join Date: Oct 1998
Location: Hagaman, NY
Posts: 2,733
Default Re: Chevy 454 Big Block

Spaceace, you're combo will make a ton of power, you wont be disappointed. Assuming you have a 'regular' 454, which it probably is, it will likely have large oval port heads, which are great to use. Look for head casting # ending in 781. But to get a decent compression ratio, you will need a domed piston. The rods and crank will likely be fine to use after reconditioning. You dont need a forged crank for what you're planning, and you dont need a 4 bolt block. A 2 bolt 454 block will support well over 600 HP, so dont sweat it. If it came out of truck, it just might be a 4 bolt, which would be nice, but not necessary.

71Nomad, dont lose sleep over the HP thing....it's the torque that you will feel, not the HP, and you will for sure have a smile on your face the first time you nail it. John
__________________
The difference between intelligence and apathy?
I have no idea, and I couldnt care less.

Johns Ride
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Chevelle Tech > Mechanical > Engine      Current Topic: Chevy 454 Big Block
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:

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.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Big Block Chevy Square Port Or Oval Port oddities Performance 87 Jun 19th, 06 10:35 AM
454 big block mac762 Engine 4 Aug 16th, 05 8:13 PM
tall deck big block questions greg_moreira Performance 3 Jun 21st, 05 7:23 AM
tall deck big block questions greg_moreira Performance 0 Jun 20th, 05 9:00 PM


All times are GMT -4. The time now is 4:36 AM.


Is there a site like this for?    El Caminos Camaros Novas Impalas GTO Chevy Punch All Chevys

2009 Team Chevelle - AutoForums