400 horsepower 1/4 mile time - 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 08-02-2012, 11:34 AM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
400 horsepower 1/4 mile time

Hi,
Will my 400hp sbc get me in the 12 secs in the 1/4 mile.
My car weighs 2600lbs,T5 manual,3.09 rear gears(small 23" tyres though)
with the camelhumps it did 14 secs,now Im putting procomp 210cc on,or will I need to spray it as well?
Fed up with being beat by 4 cylinder turbo cars!
Thanks in advance
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-02-2012, 11:49 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 6,773
Wiki Edits: 0

Thanks: 240
Thanked 621 Times in 604 Posts
400 crank hp?

If a car that light with that much power doesnt do high 11s dont tell anyone.My 67 camaro had about 380 rwhp and ran high 11s @ 114 weighing 3560 with me in it.
my 80 camaro ran 11.9s @110 weighing 3750 ish with me in it.probably made less HP than the 350 in my 67 but more torque.It was an LS-5 rat with a solid cam and victor oval port,stock LS-5 heads ,no porting,but it had 2.19/1.88 stock valves from my LS-7
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-02-2012, 12:12 PM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Thanks for that! a bit reassuring.
When I ran it with unported camelhumps it would only do 14.50@96mph,it did seem it was holding back on the top end of each gear,if it does 12s or even high 11s with the new 210cc heads does that equate to about a 100 horsepower gain? Can the heads make that much difference? Everything else on the motor is the same!

Last edited by dave350v8; 08-02-2012 at 12:18 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-02-2012, 12:23 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 6,773
Wiki Edits: 0

Thanks: 240
Thanked 621 Times in 604 Posts
I ran high 11s with GM angle plug heads.If your heads on the engine are terrible and the new ones are marvelous then 80 to 100 is not too far off.I would think 50 would be more realistic.so many variables? what headers/cam/intake/ carb are you using?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-02-2012, 12:33 PM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Im using a magnum 280 cam(480/480 lift),rpm intake,650 holley dp,only thing that I can see not good is block hugger headers!(not got much room)
Heads are procomp 210cc,mallory unilite and roller rockers.
When I run the camelhumps I had 600 holley v/s and points dizzy.
Was considering some 1.6 roller rockers to give me a bit more lift,would of taken it to 510/510
One thing worth mentioning when I had the valve guides redone(sleeved) they came back worse than before,only just noticed when I stripped them down the other day,no exaggeration they had +0.030 play in them! Smoked like a train especially on the over run

Last edited by dave350v8; 08-02-2012 at 12:40 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-02-2012, 12:38 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 6,773
Wiki Edits: 0

Thanks: 240
Thanked 621 Times in 604 Posts
Im not a big fan of hydraulic flat tappet cams.650 will work for now. I used an 850 on my 67 camaro with a 355. msd type of ignition with a rev limiter is nice.the rev limiter can save the engine if a driveline part ever breaks at WOT
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-02-2012, 12:44 PM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
I thought a 850 was too big for a 350! Anyway you ran some good times in your cars,hope I can get near them times,thanks for your advice
I like the idea of a rev limiter

Last edited by dave350v8; 08-02-2012 at 12:56 PM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-02-2012, 01:00 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 6,773
Wiki Edits: 0

Thanks: 240
Thanked 621 Times in 604 Posts
I run a 950 on my 434.Brandon Gueverra,a local fella at mission uses a 4777 holley with 4781 base plates,top is milled and ported venturis,even though it started as a 650,it now flows over 1000 cfm. small solid roller cam 355 runs 10.8s.This car has been around 25 years so its well tuned.On the chasis dyno it made a little over 400 rwhp.Its the entire package that counts.his car is 3100 pounds,using 4.88s and a powerglide.not street driven anymore.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-02-2012, 01:13 PM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Shall I use my 650dp or my 750v/s carb then,mainly using the car on the strip not going to be a daily driver!
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-02-2012, 01:19 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 6,773
Wiki Edits: 0

Thanks: 240
Thanked 621 Times in 604 Posts
use the carb you have for now.when you want to go faster,borrow a good working 750,then let the owner try and get it back from you.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-02-2012, 01:27 PM
Registered User
 
Join Date: Oct 2010
Location: united kingdom
Posts: 221
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Nice one,will try that!
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
1/4 mile time kwopper07 Hotrodding Basics 17 12-10-2007 03:25 AM
quarter mile time 63futura351w Hotrodding Basics 17 06-10-2005 03:31 AM
Does Your Mph In The 1/4 Mile Represent Your Horsepower 70SPORT Engine 18 07-01-2004 08:33 PM
1/4 mile time???????????/ 3dhunt General Rodding Tech 0 08-26-2003 03:15 PM
1/8, 1/4 mile time help Rubberman2003 Hotrodders' Lounge 1 04-16-2003 05:05 PM


All times are GMT -6. The time now is 08:29 PM.


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.