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Author Topic: Performance cam  (Read 1710 times)

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CliffB

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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?
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Offline Bounty Hunter

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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.
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CliffB

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

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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?
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'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

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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.
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Offline jfrabat

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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
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'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

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Re: Performance cam
« Reply #6 on: March 16, 2009, 09:58:34 PM »
I used:
Springs:   p5249464
Retainers: p4529216
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Matt vs YJ

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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?
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Offline Bounty Hunter

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Re: Performance cam
« Reply #8 on: March 19, 2009, 10:06:12 AM »
Direct swap, no machining.
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YJmechanic

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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
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