Register FAQ/Rules Image Hosting Members List Calendar Forum Home

Go Back   Detroit Racing Forums > Technical Discussion > Technical Articles and "How To's"

» Sponsors
Support Our Sponsors
Reply
Thread Tools Display Modes
Unread 09-03-2006, 09:33 AM   #1
Boomer!
Infraction Jackson !!!!!!
Member
 
Boomer!'s Avatar
 
Join Date: Nov 2005
Location: Wandering my empty garage moving parts 10' at a time
Posts: 966
Boomer! I need rep points!
Default How to figure what size fuel injector size to run.

A simple forumla which is very accurate. I always here people say what size should i run.



[ estimated rwhp X .50 ) / 8] /.8 = injector size.

say you have estimated 400 x .50 = 200 divided 8 which is the number of injectors on the engine= 25 divided by .8 which is the injector duty cycle= 31.25 < being the smallest suggested injector size to run.

When selecting a injector round the number up to the next available size as it is better to be below 80% duty than above. Blown or turbo application should figure for 70% duty cycle.

N/a and nitrous V8 reference chart
__________________________________________________ ______
hp injector size #'s

250 19.53
300 23.43
350 27.34
400 31.25
450 35.16
500 39.06
550 42.97
600 46.88
__________________
Build cars from a "book" when I can't even read

HOOC'd on Foniks wurkt foor me
Boomer! is offline   Reply With Quote
Unread 01-07-2007, 07:32 PM   #2
speedy
Carnage 06 tour member
Member
 
speedy's Avatar
 
Join Date: Jan 2006
Location: Sterling Hts.
Posts: 648
speedy I need rep points!
Default

I have this info on the subject. It's out of Hot Rod mag.
Attached Images
 
__________________
Mike

http://AHSA.cc

86 Grand National 45,800 miles (For Sale)
86 Mustang GT w/
speedy is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not 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
Detonation explained: BigWheelinBubba Technical Articles and "How To's" 0 07-02-2006 02:48 PM
fuel pump question!!! not2slo The Shop 1 07-01-2006 01:25 AM
*Not actual size Lisa The Alley 8 06-27-2006 05:37 AM
What size tire? Deuce450 The Shop 2 05-25-2005 05:19 PM

Powered by vBadvanced CMPS v3.2.1

All times are GMT -5. The time now is 04:14 PM.

"Used Ford Mustangs for sale in Detroit"



All posts and images belong to DetroitRacing.net and its owners.