what deck height is best.... - 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> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 08-17-2008, 08:05 PM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
what deck height is best....

I am getting ready to build a 427 big block out of a 454 block and I'm wondering what would be the best deck height to use for the build. A 9.8 or a 10.2 .Getting a merlin block with splayed main caps. It's going in my 70 monte that I'm making into a custom cruiser. Toping it with a procharger as well. Any help with this would be greatly appreciated.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-17-2008, 10:17 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,844
Wiki Edits: 326

Thanks: 749
Thanked 968 Times in 816 Posts
The tall block may present header fitment problems and interference at the brake booster.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-18-2008, 08:36 AM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well I will take that in account. Thanks for that bit of info.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-18-2008, 09:49 AM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
Unless you are going for lots of cubes there is no reason to use the tall deck. You won't be able to find a reasonable intake for it (unless you are always over 3,000 rpm) If you are running oval port heads then they don't even make an intake to match the deck height and oval ports.

Stick with the standard 9.8 height.

Why are you spending all that money on a merlin block anyways? A 427 in a 4 bolt main properly prepped and assembled is good for 800 horse all day long.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-18-2008, 10:02 AM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
I have a tall deck Merlin built for blower but it isn't a 427. Slightly larger 632
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-18-2008, 11:03 AM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
And that block is perfect for that application...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-18-2008, 06:38 PM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
block

For your application a 9.8" block is what you want to use.

Keith
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-19-2008, 08:24 PM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for the insight. I think I'll stay with the 9.8 deck. The reason for the merlin block is for the splayed main caps for extra strength and am building it from scratch new. I look to be a little over 1000 hp on pump gas in a street/strip custom crusier. Definitly worth it in the end I think.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-20-2008, 06:31 AM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
Well in that case an aftermarket block is a good way to go for sure.

But if you don't mind me asking...how do you plan to get 1000 HP on pump gas?

I have seen 800 or so but I think that is about the limit.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-25-2008, 11:31 AM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I'll be using a procharger with intercooler to acheive the horses I'm looking for. Check them out at www.procharger.com awesome site
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-25-2008, 12:50 PM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
I am sure that you can achieve the HP numbers but I think that your boost will have to be so high that you will need to run higher octane gas to prevent detonation. Big blocks start to detonate at about 9.5:1 on pump gas with the ignition in the right spot.

With a supercharger and enough boost to run those numbers you will have to build your engine at around 6.5:1 which sucks. Or maybe it doesn't suck...but it will be difficult to run 1000hp and pump gas. That is all.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 08-25-2008, 09:05 PM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Have you went and checked out the website? It shows and tells you how its done. Really not to difficult to do as long as your motors baseline hp is in the right spot. There's cars on pump gas pushing 1600+ hp. not the is just the s@#t right there...
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 08-26-2008, 04:51 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
engine

Just as a heads up... I built a procharged 427 pump gas small block chevy. It is right around 750 hp.

That car is almost useless on the street...Not sure what you going to do with another 250hp in a street car????


Keith
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 08-26-2008, 07:41 AM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
Quote:
Originally Posted by oldskoolmc
Have you went and checked out the website? It shows and tells you how its done. Really not to difficult to do as long as your motors baseline hp is in the right spot. There's cars on pump gas pushing 1600+ hp. not the is just the s@#t right there...

Yes I did read the website, it doesn't tell you how to build the motor to maintain the right compression with 24 psi of boost to keep your motor from detonating. I am sure if you do your homework you will be fine. But it is not going to be as easy as bolting on procharger on the motor and letting her rip....and still run on pump gas.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 08-26-2008, 08:41 PM
Registered User
 
Join Date: Aug 2008
Location: indiana
Age: 43
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
very true. You're not going to just bolt on a procharger and get those numbers. The motor will have to be built for it with the right combo of parts to achieve your maximum numbers without trashing your powerplant like a grenade. My car isn't going to be a daily driver but will still be very streetable for the cruises.
Reply With Quote Quick reply to this message

Recent Engine 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 Deck Height? junior stocker Engine 10 10-29-2007 11:41 AM
how do i figue out deck height denny1977 Engine 3 01-24-2006 01:57 AM
Can you use a dial indicator to measure deck height? Malibu73 Engine 9 10-26-2005 08:42 PM
What is Stock Deck Height? Chevy21 Engine 8 09-29-2004 10:00 PM
deck height? Blag General Rodding Tech 2 03-30-2003 03:37 AM


All times are GMT -6. The time now is 09:42 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.