• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Got my 347 dyno'd (but still got some issues)

  • Thread starter Thread starter Joe 5.0
  • Start date Start date Jun 3, 2010

Joe 5.0

Founding Member
Feb 1, 2002
1,184
2
38
Macomb, MI (metro detroit)
Jun 3, 2010
#1
  • Jun 3, 2010
  • #1
Thats what my car laid down today.

HOWEVER, we were not able to get it to pull past ~4700, as I have a pretty decent misfire. The cam is spec'd to have peak hp @ 6k, so it should be pretty easily into the 410-425 whp range once I get the misfire figured out.



The combo is as follows:

  • 347 CI (forged everything) ~ 10.5:1 compression
  • Jay Allen solid roller cam (~600 lift)
  • Canfield 195 heads (spec'd by Jay Allen)
  • Victor 5.0 intake (upper extrude honed, lower port matched to heads, inlet 90mm)
  • 90mm Accufab TB, 90mm MAF, 4" intake tubing)
  • 1 3/4 Accufab LT's w/ 3" collector, 3" offroad hpipe
  • 3" Hooker Aerochambers (loud) with dumps


As you can see I am leaving alot of power on the table, as tq is STILL climbing when it starts to cut out. I have to figure out if its the plug wires, cap/rotor, distributor, or ignition box (or something else :/ )

Its frustrating that its STILL not 100%, but its moving in the right direction. As soon as I get the misfire figured out it'll go back for a couple full pulls to 7k.
 

nmcgrawj

Advanced Member
Sep 28, 2003
3,651
4
68
Indianapolis, IN
Jun 4, 2010
#2
  • Jun 4, 2010
  • #2
Looks great man. Is Jay still out in the saline/ann arbor area?
 

Joe 5.0

Founding Member
Feb 1, 2002
1,184
2
38
Macomb, MI (metro detroit)
Jun 4, 2010
#3
  • Jun 4, 2010
  • #3
As far I know, yeah he's out in Saline.
 

Dino Dino Bambino

15 Year Member
Jun 13, 2007
1,672
89
79
Cyprus
Jun 5, 2010
#4
  • Jun 5, 2010
  • #4
The torque peak of 388 at 4750rpm looks to be right on the money. The problem is the horrendous misfire from 4900-5700rpm and then again from 5800rpm upwards. The peak of 395 at 5750rpm gives a good indication of what your 347 is capable of. I think the peak will be more like 400 at 6000rpm when you've sorted out the misfire. Redline will effectively be at about 6500.
 
You must log in or register to reply here.

Similar threads

B
'03 GT Fuel Pump/Pressure/Delivery Issue
  • Brodach
  • Oct 21, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
884
SN95 4.6L Mustang Tech Oct 31, 2025
gkomo
What in gods green earth happend to my N/A 2.3?
  • Piranahbite
  • Mar 24, 2024
  • 2.3L (N/A & Turbo) Tech
Replies
8
Views
2K
2.3L (N/A & Turbo) Tech Jun 1, 2024
Piranahbite
Engine Is there something wrong with my engine or is this just normal modded fox behavior?
  • AnthonyA1234
  • Aug 30, 2022
  • Fox 5.0 Mustang Tech
Replies
6
Views
2K
Fox 5.0 Mustang Tech Aug 30, 2022
90sickfox
My saga of keeping the car running cool
  • hoopty5.0
  • May 19, 2022
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 20, 2022
hoopty5.0
J
Goldbox misfire issue at low load
  • James408
  • Dec 8, 2020
  • Digital Self-tuning Forum
Replies
14
Views
2K
Digital Self-tuning Forum Dec 17, 2020
James408
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific 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?