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Author
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Topic: Should I be ok with the x303 cam with my 351 jr windsor heads at 600 max lift
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87 coupe
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Member # 10919
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posted
 
 
Like title says my heads have a 600 max lift and the xcam has a Valve lift of 542 and 286 duration dnt care too much about leaving hp on the thanksgiving table I know there's better cams this is what I got mean while I get the funds for a custom grind cam and a blower What u guys think And the heads are world products 351 jr windsor heads with upgraded double springs i know for a fact these heads come with single springs and I'm using 1.6 crane cams rr
Posts: 2016 | From: Home | Registered: May 2011
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coupedup
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Member # 9987
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posted
What are the combustion chamber size for the heads?
Even though the heads can accept to 600 lift and the cam is 542 lift it should work fine but check for piston to valve clearance to make sure your valves arent hitting the piston.
I had some ptv issues with an f-cam and custom aluminum heads.
also keep in mind there are alot of better custom cams out there than the X.
Posts: 4406 | From: Ca | Registered: May 2010
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87 coupe
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Member # 10919
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posted
I'm going to run probe srs forged pistons I still haven't assembelled the short block last time I checked summit said a e303 was going to be fine with my set up but i know that cam is smaller, Combustion Chamber size is 58cc but was decked to 54cc at a machine shop with shims on the valve springs and intake runners are 180cc
Posts: 2016 | From: Home | Registered: May 2011
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coupedup
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Member # 9987
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posted
its hard to say what type of issues you could potenially run into because dpending on what type of valve reliefs the pistons have, combined with the 54cc heads I cant say for sure but definitely check for ptv clearance when you go to assemble.
Posts: 4406 | From: Ca | Registered: May 2010
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87 coupe
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Member # 10919
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posted
Yeah thanks I'll check next week when I get my rotating assembly back from the machine shop the pistons have 2 valve reliefs flat tops and valve relieves looks pretty big but whoe knows right.
Posts: 2016 | From: Home | Registered: May 2011
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