Dart SHP heads - Page 2 - 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
  #16 (permalink)  
Old 08-01-2012, 06:00 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,876
Wiki Edits: 0

Thanks: 17
Thanked 307 Times in 287 Posts
Quote:
Originally Posted by prostcelica View Post
I wont be turning the motor past 6500 Tops!!. Probably put a 6000 pill in my msd just to be safe. This will aslo be a street car. Ive read you really dont want to use anything above a 195cc intake runner on the street. Also seen many people say 180 runner is perfect for 350 street motor. I talked to 2 people at AFR one said use the 180's for sure. The other said Because of the weight of my car (2500#'s) he go 195's. Being that im a cheap a** I considered getting a cheaper set of heads(still want decend quality) and port and polish them.
I would like to make 450hp but still have a reasonable amount of tourqe.

Any head suggestions would be appreciated. I can get a set of AFR streets to my door for 1715.00 USD. If I could get a set to my door for $1200 and port and polish and achieve that 450hp goal I think thats the way I would go. Im in Canada btw
If your redline is 6000 rpm then you have the wrong cam. For that rpm on a 350 a 180cc runner is about perfect. A cam with about 225 intake duration (.050" hyd) will be about right.

You need to pick a concrete target and have all your parts work towards that goal, not just slapping parts together.

BTW taking about 10cc's out of junk yard vortec heads along with a good valve job and stock valve would actually be about perfect for your goals, and can be done for less that $500. Much less if you're resourceful.

You're making reaching your goal much more complicated than it needs to be.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 08-02-2012, 04:42 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,433
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by prostcelica View Post
Thanks for the info 2wldr4u. I think I would just spend the extra 200$ and get the AFR's though.
Where can you buy AFR's for 1020.00 ???
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 08-02-2012, 04:44 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,433
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by vinniekq2 View Post
AFR 180s will support 550 plus Horse power,how much HP are you planning on making?
A 180 runner head 550 horse are you serious!!
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 08-02-2012, 04:45 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,433
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by prostcelica View Post
Here is the link to the heads I am looking at. Being that its going to be a street car isnt a 200cc head to big?? I told Comp what I was doing and thats the cam they recomended

Hey CNC block: Do you like the SHP heads??

Dart 127122 - Dart SHP Special High Performance Cylinder Heads - Overview - SummitRacing.com
I have a set of the 200 coming this week but here is some info on the 200's

ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test - Yellow Bullet Forums
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 08-02-2012, 08:52 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,707
Wiki Edits: 0

Thanks: 309
Thanked 742 Times in 713 Posts
CnC,whats the confusion?
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 08-02-2012, 10:43 AM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
Heyyou car CNC. I wish I could get AFR's for 1020 (so does everybody I would thnk :-) ) AFR's will cost me 1720 usd by the time I have them in my hand. Do you think the dart 200cc head would be to big for 355 street car?? Also that link you posted look like it was for a 383. What do you think those numbers would be like on my setup if I did some clean up on the heads??

Thanks again for the great info
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 08-02-2012, 10:53 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,433
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by vinniekq2 View Post
CnC,whats the confusion?
No confusion I have built alot of engines over the years and if I was looking for 550 horse it would not be with a 180 runner head.
Reply With Quote Quick reply to this message
  #23 (permalink)  
Old 08-02-2012, 10:59 AM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,433
Wiki Edits: 0

Thanks: 1
Thanked 17 Times in 17 Posts
Quote:
Originally Posted by ap72 View Post
Flow numbers aren't everything. Using the smallest port will result in severe choking at high rpm. There are ways to corectly size the port and the valve for your intended usage, always using the smallest is not one of them. You can get 250cfm out of ported stock castings, that doesn't mean they're good for performance.

Btw excessive velocity is just as bad as inadequate velocity if not worse.
X2

Just another guy racing a flow bench LOL
Reply With Quote Quick reply to this message
  #24 (permalink)  
Old 08-02-2012, 11:03 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,707
Wiki Edits: 0

Thanks: 309
Thanked 742 Times in 713 Posts
most street driven cars dont even need the flow of a 180 cc intake runner AFR head.I use dart 227 heads on my car,its not that Im scared or unaware of what those heads can produce.Just look around at the general posts,hydraulic cams,small to medium carbs,most carbs are vacuum secondaries,lots of dual plane intakes,small tube headers,2 1/2 inch exhaust or smaller,,,,why would any of these applications need 200 plus CC heads?
Reply With Quote Quick reply to this message
  #25 (permalink)  
Old 08-02-2012, 12:08 PM
Registered User
 
Join Date: Jul 2012
Location: Franklin
Posts: 85
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
I have used Darts for years and refuse to buy any other name brand to race with for two reasons reason #1 out of the box they out flow all other competition and #2 they are truely a track proven performance head I have a set of the 230 pro1's on a 410 small block as we speak the shp series are nice for any app and I believe the dude that replied about the cast iron heads was probably thinking of the sportsmans which are still excellent heads but you won't be disappointed with any Dart head you pick!
Reply With Quote Quick reply to this message
  #26 (permalink)  
Old 08-02-2012, 03:57 PM
Cridder's Avatar
Registered User
 

Last journal entry: 310 Small Block Chevy
Last photo:
Join Date: Oct 2010
Location: Nanaimo (Cedar) BC Canada
Posts: 61
Wiki Edits: 0

Thanks: 3
Thanked 2 Times in 2 Posts
ram induction pass-a

Quote:
Originally Posted by ap72 View Post
Flow numbers aren't everything. Using the smallest port will result in severe choking at high rpm. There are ways to corectly size the port and the valve for your intended usage, always using the smallest is not one of them. You can get 250cfm out of ported stock castings, that doesn't mean they're good for performance.

Btw excessive velocity is just as bad as inadequate velocity if not worse.
Remind me to tell that to the next guy i see running a tunnel ram,
i take it theres no benefit to port velosity in the late stages of valve closing.
I think someone once said "when is fast fast enough" that person should have the answer, he can tell us why excessive port velocity is bad.
Reply With Quote Quick reply to this message
  #27 (permalink)  
Old 08-02-2012, 04:29 PM
Registered User
 
Join Date: Jan 2010
Location: joplin
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i run the brodix ik 200, on 355 and 383 and for the money they real hard to beat ,run 11.80 with 355 and 11 .00 with 383 turning 6500 with both, and those are right out of the box, check them out might be something your interested in
Reply With Quote Quick reply to this message
  #28 (permalink)  
Old 08-02-2012, 05:24 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,876
Wiki Edits: 0

Thanks: 17
Thanked 307 Times in 287 Posts
Quote:
Originally Posted by Cridder View Post
Remind me to tell that to the next guy i see running a tunnel ram,
i take it theres no benefit to port velosity in the late stages of valve closing.
I think someone once said "when is fast fast enough" that person should have the answer, he can tell us why excessive port velocity is bad.
Port choke and air fuel seperation.

Look at the engines being developed now, specifically the current ls and hemi runner designs... also consider those engines will rarely see more than 5,000 rpm and spend the majority of their lives right above idle...

But I'm sure they were doing much better in 1965 than in 2012...
Reply With Quote Quick reply to this message
  #29 (permalink)  
Old 08-02-2012, 05:37 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,186
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
Dart SHP heads

I have been on Comp Cams CamQuest. I went thru every HYD. roller cam they have recommended and according to the dyno results on their cams you wouldn't come close to 450 Hp with your parts. Now if you use the Dart SHP heads with a Comp solid roller XR280R, 2500-6500 rpm range, single plane intake with a 750 cfm carburetor,3.73-3.90 gears and a 3000 stall it will put out 424.1 hp@ 5500 and 436.7 lbs of torque @ 4500 rpms. With the largest Hyd roller hp was like 387 hp @ 5500 with your intake and carb. If you wanted 450 hp should have done some research and built a 383.
Reply With Quote Quick reply to this message
  #30 (permalink)  
Old 08-02-2012, 06:17 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
I went 355 because I got a smokin deal on itfrom a friend. I would like to make 450hp but at the end of the day I just want to build a nice stout street motor.
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
Dart Shp Sbc 407 Build Help! kertwood Engine 21 12-12-2010 11:46 AM
DART SBF Blocks...SHP V's Sportsman Peter James Engine 2 05-23-2010 12:51 AM
questions about the dart shp block boredandglued Engine 7 12-26-2009 12:41 PM
Dart SHP Short Block Camaro2 Engine 2 11-13-2009 07:04 AM
Dart intake? Brodix or Dart Heads? Slowass72 Engine 3 01-20-2004 04:52 PM


All times are GMT -6. The time now is 04:26 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.