« previous next »
Pages: [1]   Go Down

Author Topic: Performance cam  (Read 1711 times)

0 Members and 1 Guest are viewing this topic.

CliffB

  • Guest
Performance cam
« on: March 15, 2009, 03:11:46 PM »
If I install this cam (#p4529658 specs are .450/.450 hydraulic lift----256/256 duration -- 40 overlap-- made by crane cams sold thru mopar). Would I have to fatten up the fuel mixture or could the factory computer compensate enough for it?
Logged

Offline Bounty Hunter

  • Member
  • Posts: 1658
    • http://www.sija.org
Re: Performance cam
« Reply #1 on: March 15, 2009, 07:00:19 PM »
I have a similar cam and the ECM seems to do fine.  But i also installed some Ford v8 injectors, with a few other mods.  The stock ECM can handle a cam change.
Logged

CliffB

  • Guest
Re: Performance cam
« Reply #2 on: March 15, 2009, 07:19:55 PM »
Did it make a noticable difference?
Logged

Offline jfrabat

  • Gargantuan Mango Tree Mechanic®
  • Member
  • *
  • Posts: 3676
  • Finally USING the Jeep!
Re: Performance cam
« Reply #3 on: March 15, 2009, 07:36:44 PM »
Quote from: Bounty Hunter on March 15, 2009, 07:00:19 PM
I have a similar cam and the ECM seems to do fine.  But i also installed some Ford v8 injectors, with a few other mods.  The stock ECM can handle a cam change.

You also need to change the valve springs, right?  If so, what kind of springs do you need? Simply new stock springs, or stiffer ones?
Logged
'94 YJ 2.5L with 4" RE lift, Superwinch EPi9.0, FoMoCo e-Fan, SD30 and SD35 w/ARB-5.13, 165A alt., 33" BFG KM2 on 15" AR wheels, Sony sound system, Pavement Ends Hardtop, Hydroboost

Offline Bounty Hunter

  • Member
  • Posts: 1658
    • http://www.sija.org
Re: Performance cam
« Reply #4 on: March 15, 2009, 10:27:41 PM »
You need mopar performance valve springs that are rated for the increase in valve lift.  I'll post up a part number soon, but I think it's in the FAQ.
Logged

Offline jfrabat

  • Gargantuan Mango Tree Mechanic®
  • Member
  • *
  • Posts: 3676
  • Finally USING the Jeep!
Re: Performance cam
« Reply #5 on: March 16, 2009, 12:00:55 AM »
Quote from: Bounty Hunter on March 15, 2009, 10:27:41 PM
You need mopar performance valve springs that are rated for the increase in valve lift.  I'll post up a part number soon, but I think it's in the FAQ.

Which one are they?

P4529214     Cylinderical
P4529215     Conical

Spring retainers
P4529216 Cylinderical Valve Spring
P4529217 Conical Valve Spring

Felipe
Logged
'94 YJ 2.5L with 4" RE lift, Superwinch EPi9.0, FoMoCo e-Fan, SD30 and SD35 w/ARB-5.13, 165A alt., 33" BFG KM2 on 15" AR wheels, Sony sound system, Pavement Ends Hardtop, Hydroboost

Offline Bounty Hunter

  • Member
  • Posts: 1658
    • http://www.sija.org
Re: Performance cam
« Reply #6 on: March 16, 2009, 09:58:34 PM »
I used:
Springs:   p5249464
Retainers: p4529216
Logged

Matt vs YJ

  • Guest
Re: Performance cam
« Reply #7 on: March 18, 2009, 09:16:33 PM »
Quote from: Bounty Hunter on March 16, 2009, 09:58:34 PM
I used:
Springs:   p5249464
Retainers: p4529216

Did you need to have the spring seats machined, or are these a direct swap?
Logged

Offline Bounty Hunter

  • Member
  • Posts: 1658
    • http://www.sija.org
Re: Performance cam
« Reply #8 on: March 19, 2009, 10:06:12 AM »
Direct swap, no machining.
Logged

YJmechanic

  • Guest
Re: Performance cam
« Reply #9 on: March 31, 2009, 12:10:25 AM »
clifford makes them too if you need/  i know for a while the mopar stuff was hard to find/  thats why i have clifford stuff in mine
Logged
Pages: [1]   Go Up
« previous next »