• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

opinions 1/4 mile times

  • Thread starter Thread starter speedy66
  • Start date Start date Feb 20, 2004
S

speedy66

Founding Member
Jun 20, 2000
629
0
0
glendale,arizona,usa
Feb 20, 2004
#1
  • Feb 20, 2004
  • #1
My motor specs are in my sig
I am running a c4.. 3.00 gears (open) and 275/60/r15 tires

what you guys think I will run? I am hoping for mid 13's
 
J

jesserose17

New Member
Aug 21, 2003
219
0
0
Southern CA
Feb 20, 2004
#2
  • Feb 20, 2004
  • #2
Having an open rear may mean less traction and also 3.00 is kind of tall for drag racing... I am guessing low 14's. Good luck and let us know what are your times!
 
J

John Z

Founding Member
Sep 21, 2000
581
0
0
Morgantown WV
Feb 20, 2004
#3
  • Feb 20, 2004
  • #3
I'll say 10.5 seconds but only because I want people to feel good after reading my post. Just use my number and never take the car to the strip (and never never never street race) and you will feel good for a longtime . If you ignore the advice and take the car to the strip, be prepared to be disappointed.
 

BobV

20+ Year Stangneter
May 18, 2003
474
0
16
Leavenworth, KS
Feb 20, 2004
#4
  • Feb 20, 2004
  • #4
Sorry, but with that rearend, I'll go 15.5.

Get a two-striper and some high 3 gears, I'd go low 14's.
 

Edbert

Founding Member
Jul 13, 2002
3,548
32
109
Austin TX
Feb 20, 2004
#5
  • Feb 20, 2004
  • #5
I'd say 15.25, but I don't know the specs on these items "FMS B-Cam, Mildly ported E-7s". What are the valve/port sizes on those heads, are they aluminum? What are the specs on that cam, is it hydraulic roller or solid? Have you done anything to imrove the shifting of the C4? What about the suspension?
 
S

speedy66

Founding Member
Jun 20, 2000
629
0
0
glendale,arizona,usa
Feb 20, 2004
#6
  • Feb 20, 2004
  • #6
only reason why i say 13's is I have seen a similar set up on a 67 and he ran 13.9

b cam specs are 284*, .480" lift Hyd roller
C4 has a street shift improver kit.. nothing radical
e-7s are cast iron.. I believe, and also the valve/port sizes are unknown to me.. I got the heads in a trade

gears I plan on going with 3.55s
 
S

speedy66

Founding Member
Jun 20, 2000
629
0
0
glendale,arizona,usa
Feb 20, 2004
#7
  • Feb 20, 2004
  • #7
suspesnion is.. 620lb eiback drop coils in front.. keyb gas adjust shocks.. no swaybar..

rear. gabriel airshocks.. very week and old rear leaf springs/
 
M

mp67

Founding Member
Nov 4, 2002
392
0
0
Texas
Feb 20, 2004
#8
  • Feb 20, 2004
  • #8
Mid 13's is a lofty goal with that rearend. Like someone else said, not enough info on motor combo(cam specs, compression ratio, etcc.) to make a good call.

Ok, you posted as I was writing this on cam specs. If you have the 3.55 in before you run, that is a good step in the right direction. Is it still going to be open? Could limit traction. If those are stock E7's, I would still say no on mid 13's. Probably mid 14's, but hey, now is your chance to prove us wrong.
 
S

speedy66

Founding Member
Jun 20, 2000
629
0
0
glendale,arizona,usa
Feb 20, 2004
#9
  • Feb 20, 2004
  • #9
ok more specs on the cam

lobe is 112.. duration at .050 is 224
comp ration is 10:1

I know the heads are gasket matched.. and the ports have been opened and smoothed.. not sure what else there is..
 
J

jesserose17

New Member
Aug 21, 2003
219
0
0
Southern CA
Feb 20, 2004
#10
  • Feb 20, 2004
  • #10
speedy66 said:
rear. gabriel airshocks.. very week and old rear leaf springs/
Click to expand...

I would suggest replacing & upgrade the rear leaf springs to 5 leaf, otherwise you may have severe wheelhop. I can vouch for this, I used to have real bad rear wheel hop with my original 4 leaf springs... and I have replaced it with 5 leaf, no more wheelhop!
 
6

'69Stang

Founding Member
Sep 28, 1999
1,130
2
38
Metro Detroit
Feb 20, 2004
#11
  • Feb 20, 2004
  • #11
Mid 14's....
 

SandSprite

Member
Feb 8, 2003
332
0
16
L.A., CA
Feb 20, 2004
#12
  • Feb 20, 2004
  • #12
14's if u can get it to hook. Wheel hop will probably be your weakness (as well as your gear ratio). as is, id bet high 14's- low 15's.
 

12sec67

Active Member
Oct 6, 2003
1,301
1
36
San Diego, Ca
Feb 20, 2004
#13
  • Feb 20, 2004
  • #13
high 14's with wheellhop and a ugly 2.3+ for a 60'
 
S

speedy66

Founding Member
Jun 20, 2000
629
0
0
glendale,arizona,usa
Feb 21, 2004
#14
  • Feb 21, 2004
  • #14
never had wheel hop yet.. goofen around on the street.. but mainly doing from idle launches...

the 275/60/r15 is a bit hard to hop with 3.0 gears.

while I am at it.. what would be a good rpm to launch at?
 
You must log in or register to reply here.

Similar threads

O
Good all around perfornace-ish tires?
  • optionizerSS
  • Jan 25, 2026
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
7
Views
350
2005 - 2014 S-197 Mustang -General/Talk- Jun 15, 2026
TPony
D
Exhaust set up
  • dropteeth
  • Sep 20, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
19
Views
551
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 24, 2025
AeroCoupe
O
SOLD FS: 18" FR500 chrome wheels and Toyo tires
  • optionizerSS
  • May 21, 2026
  • Other Classifieds
Replies
1
Views
114
Other Classifieds Jun 2, 2026
optionizerSS
O
3
Eight inches is enough for me...
  • 351MooseStang
  • Nov 27, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
5
Views
584
1974 - 1978 Mustang II Talk & Tech Mar 2, 2026
Bullitt347
Mustang II 4 cyl gear hunting and possibly messed up vacuum system
  • oesterreicher
  • May 31, 2026
  • 1974 - 1978 Mustang II Talk & Tech
Replies
11
Views
310
1974 - 1978 Mustang II Talk & Tech Jun 14, 2026
manicmechanic007
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang 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?