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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Finalizing Engine Plans

  • Thread starter Thread starter Performance Red
  • Start date Start date Oct 4, 2005
P

Performance Red

Member
Nov 29, 2004
75
2
6
Oct 4, 2005
#1
  • Oct 4, 2005
  • #1
Alright I've made a few posts regarding what my setup for the engine i plan to swap in this winter and i just have a few final questions about head/cam selection my currently planned setup was:
MPH Stage 2 1/2 Heads
VT Stage I cams
Dragon Upper Intake Plenum
Dragon 75mm TB
K&N FIPK
BBK Ceramic Coated Longtube Headers
VRS Offroad X-Pipe
4.10's

My plan is to stay n/a with a good amount of performance, but i have a few questions before I start ordering this setup. Would the vt stage II cams be too much cam for a daily driven car? I dont want the car to be really sluggish below 3k rpm. I know the VT stage II's would have a higher peak horsepower number (with the trade-off of having to rev the engine higher to achieve that number), but I'm not really interested in setting the rev limiter any higher then 6,400. I've talked with VT and they say that stage II's are fine in a daily driver, but i still have my concerns. My second question is regarding the 2.5 heads, are they overkill for a n/a car? I have heard that you can reach a point where you have ports that are too large for a n/a car to properly support. Any help is appreciated.
 
J

jimfitzgerald

New Member
Apr 11, 2001
6,672
0
0
Oct 4, 2005
#2
  • Oct 4, 2005
  • #2
I would order a set of custom Comp cams from MPH and have Tim spec them out to match your MPH heads.
 

RedDaemon

10 Year Member
Mar 31, 2005
3,470
9
108
Atlanta, GA
Oct 4, 2005
#3
  • Oct 4, 2005
  • #3
i think with that custom grind and 4.10's, vt stg II should be fine for a dd
 
B

Blown00GTAuto

Founding Member
Jun 7, 2002
182
0
0
Washington DC
Oct 5, 2005
#4
  • Oct 5, 2005
  • #4
Performance Red said:
....Would the vt stage II cams be too much cam for a daily driven car? I dont want the car to be really sluggish below 3k rpm. I know the VT stage II's would have a higher peak horsepower number (with the trade-off of having to rev the engine higher to achieve that number), but I'm not really interested in setting the rev limiter any higher then 6,400. ...
Click to expand...

If you're going to get "stage 2.5" heads then get cams to match them, i.e, to get optimal performance in your rpm range. As someone already suggested it would be wise to go to MPH for custom grinds. 4.10's will give you more torque to the ground, even though you'll lose some low end engine torque from the bigger cams. Once you feel the top end pull you'll have no regrets.

As far as the ability of a 2v shortblock to withstand a decent level of rpms, my shifting was at 6500 rpms for the longest with 380+ rwhp (on an auto), and I know of 2 others who have shifted stock 2v shortblocks at 6500-6600 for 3+ years of drag racing. One of those cars is 430+ rwhp on a stock longblock - 4 years blown.
 

billfisher

Active Member
Jul 17, 2005
1,296
4
38
huntsville, AL
Oct 5, 2005
#5
  • Oct 5, 2005
  • #5
2v ports will never be too large.
 
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