great lakes dragway test and tune 4-13-13 - Page 2 - 460 Ford Forum
General Race Tech All other topics, such as Fuel Delivery, Ignition, Engine, Safety, Data Aquisition, Suspension, etc...

User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #16 of 22 (permalink) Old 04-21-2013, 10:32 PM Thread Starter
Member
 
Join Date: Jan 2007
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by BOSS 429 View Post
what rpm are you crossing the line at? 3.70 gear might not be enough?

i had a 5700 rev chip and i was bouncing off the limiter right at the end.
twekd1 is offline  
Sponsored Links
Advertisement
 
post #17 of 22 (permalink) Old 04-22-2013, 07:25 AM
Super Moderator
 
bigblok86ranger's Avatar
 
Join Date: Mar 2009
Location: Beloit , Wisconsin
Posts: 5,255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
      
Send a message via Yahoo to bigblok86ranger
Quote:
Originally Posted by bigblok86ranger View Post
Try 7.5 psi fuel pressure, hopefully you have a 1/2" or -8 minimum fuel lines.
What needle and seats are in the carbs? Put the good viton tipped .150" seats in if you don't have them already and get the fuel pressure up. I think the better needle seats will allow ~9.5 psi. Someone will correct me if I am wrong.

The Holley Blue is only rated to around 550hp I ran one with around 690hp but with only one carb you may need to upgrade your pump.

Eric Millard
bigblok86gt@yahoo.com

528ci of N/A power

Circle R Racing Engines

Trick Chassis
Beloit,WI 53511
608-313-9197

http://www.trickchassis.com/

"LOL, WE DONT RACE DYNOS" Quoted for the truth!
bigblok86ranger is offline  
post #18 of 22 (permalink) Old 04-22-2013, 08:58 PM Thread Starter
Member
 
Join Date: Jan 2007
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Correction i have a black pump on the carbs and a blue pump for the nitrous.

So besides fuel pressure what else can it be? What number squirters should i run and cam color? (it has the large 50cc accelerator pumps)
watching the car i see its not puffing fuel smoke when i stall it out but it does when i floor it.

I am sure the carbs used to run alcohol, could something be drilled out that i should look for?

The ignition system is a old school msd 7al-2, msd pro billet distributor, and a msd pro power coil.
twekd1 is offline  
post #19 of 22 (permalink) Old 04-30-2013, 12:28 PM
Senior Member
 
Join Date: Aug 2008
Location: WAY up in the U.P. of M.I.
Posts: 878
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
If its doing it's surging at WOT, the squirters or pump cams have nothing to do with it. If they were Alky carbs before, the metering blocks and main body passages are probably too big. The Surging sounds like a fuel delivery problem to me....

557ci 70 Maverick, 8.76@153 1.25 60ft.... So far....
A70Maverick is offline  
post #20 of 22 (permalink) Old 05-09-2013, 09:52 PM Thread Starter
Member
 
Join Date: Jan 2007
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
so after playing with jets last time out I realized carb tuning is expensive and difficult. I am all in now i purchased 2 full jet kits and 2 full accelerator pump tuning kits. I also purchased a Innovative motorsports LM2 data logger with 2 o2 sensors. it has the capability of adding a ton of sensors. right now it will have rpm and air fuel in each header collector. wish me luck
twekd1 is offline  
post #21 of 22 (permalink) Old 05-10-2013, 01:35 PM
Member
 
stang93mustang's Avatar
 
Join Date: Mar 2009
Location: Elgin, Illinois
Posts: 118
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
 
A little late now but I would say get a victor jr. manifold with a 1050 dom. and you good to go.

You would need a pump pressure of at least 12-15psi to handle demand. Need 6 1/2 to 7 1/2 psi from regulator to carb. Check float height adjustment. (This is for single carb tune but you can get the ideal)

93' LX hatch, 460 with mods and factory heads, TH400 trans, 9" w/ 3.89 spool. Best (so far!) of 10.04 @ 133 mph w/ 1.36 60'
Wanna see a low budget BBF run: (I know..the date trips me out!)

https://www.youtube.com/watch?v=70l4...e_gdata_player
I'm not SAYING, I'M JUST SAYING!!!

Last edited by stang93mustang; 05-10-2013 at 01:39 PM.
stang93mustang is offline  
post #22 of 22 (permalink) Old 05-12-2013, 01:22 AM
Senior Member
 
Join Date: Aug 2008
Location: WAY up in the U.P. of M.I.
Posts: 878
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Pull the motor out and dyno it. Best $$ you'll ever spend! You already spent WAY more than a dyno session trying to figure it out!

557ci 70 Maverick, 8.76@153 1.25 60ft.... So far....
A70Maverick is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 460 Ford Forum 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 for yourself.

Email Address:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
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