• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

3" vs. 2.75"

  • Thread starter Thread starter luckythirteen13
  • Start date Start date Oct 9, 2005
L

luckythirteen13

New Member
Jul 19, 2005
648
0
0
Anaheim, CA
Oct 9, 2005
#1
  • Oct 9, 2005
  • #1
right now im running a 3" pulley on my vortech. its making about 7# of boost on my motor. i have a 2.75" pulley and since im going to the tuner tomorrow or the day after i thought id see what you guys think about going with more boost. i was wondering how much more boost id get from the smaller pulley.
http://www.koolpages.com/potatohell/filename.html here is the dyno sheet from the last time i was there. my fuel system just couldnt handle it so all the test were cut short. you can see it went lean at 4000rpm. right now i have a 255lph intank pump, t-rex in line pump, 42# injectors and 80mm pro-m. the tuner said id get around 425rwhp with the 3" pulley. you think i should go for more boost or be happy with what i have? the bottom end is stock with about 100k miles. there is only about 7k miles on the afr165's and everything above them. sc has less then 100 miles.
i dont want to push the limit but i defenitely dont want to be slow.
any input would be great
thanks
 

Lyncher

New Member
Jun 14, 2005
434
0
0
Oct 9, 2005
#2
  • Oct 9, 2005
  • #2
..maybe bump it up to 8#s but you dont wanna get to or above 450rwhp they is consdiered the safe amount of power you can make on a stock block. Sure you can make more and it might take it for a while but it is a time bomb. You could maybe get away with 9# but its pushing it
 
L

luckythirteen13

New Member
Jul 19, 2005
648
0
0
Anaheim, CA
Oct 9, 2005
#3
  • Oct 9, 2005
  • #3
well if im at 7# now with the 3" i doubt the 2.75" will only make 1 pound more so maybe ill just stick to the 3". it is my daily driver
 

Lyncher

New Member
Jun 14, 2005
434
0
0
Oct 9, 2005
#4
  • Oct 9, 2005
  • #4
^ yeah basically what I was getting at... lol maybe get a powerpipe or something I think they give you like 1# I could be wrong...I think the rule of thumb is somting like 1#=12-15rwhp..
 
L

luckythirteen13

New Member
Jul 19, 2005
648
0
0
Anaheim, CA
Oct 9, 2005
#5
  • Oct 9, 2005
  • #5
when mm&ff did a test on the power pipe they got 4# extra. im sure results arent typical but even still........
well i guess ill run it on the dyno the way its sitting now. im going tomorrow or tuesday (he said hes not sure if hell open tomorrow) so ill post my results and a vid if i remember my camera
thanks
 
You must log in or register to reply here.

Similar threads

Fuel Vortech Supercharger injectors
  • Dontknowchit
  • Mar 13, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
1K
Fox 5.0 Mustang Tech Mar 8, 2026
from6to8
A
Discussion on mild budget build/ top end
  • Acesario
  • Feb 21, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
644
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 23, 2026
General karthief
Electrical Innovate PSB-1 is DOA? Am I an idiot? All plausable. Please Help
  • Dontknowchit
  • Apr 26, 2025
  • Fox 5.0 Mustang Tech
Replies
1
Views
388
Fox 5.0 Mustang Tech Apr 26, 2025
Dontknowchit
Stand alone vs chip tune (for noob)
  • nicholase
  • Jan 2, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2 3
Replies
44
Views
2K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 1, 2025
Noobz347
Question about power steering.
  • 2003 mustang gt modded
  • Oct 23, 2024
  • 1994 - 1995 Specific Tech
Replies
5
Views
407
1994 - 1995 Specific Tech Nov 15, 2024
manicmechanic007
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?