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building 557 info

 
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diverjet
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Joined: 25 Mar 2007
Posts: 2
Location: michigan
167.36 points



PostPosted: Sun Mar 25, 2007 7:10 pm    Post subject: building 557 info Reply with quote

Very Happy Idea I'm putting together the block an need to get an idea of what cam to use the heads are 429 cj cc to 73 cc ported an polished running trick flow tunnel duel 850 dry shot nos this is for my jet so pump will be built to take motor output any ideas would help
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Big Dave
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Joined: 04 Dec 2005
Posts: 2644
Location: Tampa Florida
119910.22 points



PostPosted: Sun Mar 25, 2007 8:18 pm    Post subject: Reply with quote

From Comp Cam I would recommend either a XM278H, or the XM288H grinds.

The XM278H has a 2000 to 6000 RPM range with 278/292 advertised duration and 234/244 duration @ 0.050" lift with 0.574"/0.576" lift on a 112 LSA.

The XM288H has a 2200 to 6500 RPM range with 288/304 advertised duration and 244/254 duration @ 0.050" lift with 0.580"/0.585" lift on a 112 LSA.

Lunati has a hydraulic flat tappet that might work; a split cam profile grind number 00096 with specs of 214/224 duration @ 0.050" lift and 0.516"/0.543" lift on 112/108 LSA.


Big Dave
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diverjet
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Joined: 25 Mar 2007
Posts: 2
Location: michigan
167.36 points



PostPosted: Mon Mar 26, 2007 10:09 am    Post subject: info Reply with quote

I've been told because of the jet pump an 108 valve sep. works best but have not had much tinkering with fords with the jet also would be using an roller cam Razz the lift you have put is under 600 is this due to the heads an cfms an the 112 vavle sep does this work best with the nos Idea I 'm wanting to two stage the nos what do you think is to much or is this an play and learn thing
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