This is topic Will a x303 work on my set up? in forum Tech Talk at Northern California Ford Owners .
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Posted by 87 coupe (Member # 10919) on
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I have some 351 jr windsors with upgraded dual springs I believe my max lift with single springs was 570-600 and the cam has a 542 lift Im going with a gt40 tubular and a 70 mm tb and spacer how would my set up respond to this cam here's some pics maybe that helps a lil more any advice
Head specs:
Cam specs:
[ August 09, 2012, 04:21 PM: Message edited by: 87 coupe ]
Posted by 87 coupe (Member # 10919) on
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Any one?
Posted by 91blackonblack (Member # 11591) on
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Im pretty sure it will clear bro.my boy had a 306 with eddie heads wit the x cam an hee cleared perfectly.an i had the f cam an peoole didnt think i wouldnt clear either.but google any info u want an its people out there that did things we doing nowa days.its been done before im pretty sure.
Posted by 87droptop50 (Member # 7185) on
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You should be ok
Posted by 87 coupe (Member # 10919) on
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Yeah I think it should too did some research and everything looks good I'm running a fresh 306 those heads and x303 should be a runer shit is getting too Xpensive lol but will be worth it
Posted by turbo50 (Member # 6700) on
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Roller or non roller springs?
Flat tappet cams and roller cams and just cams in general all have different seat and nose values.
Posted by 87 coupe (Member # 10919) on
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It's roller
Posted by turbo50 (Member # 6700) on
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quote:
Originally posted by 87 coupe:
It's roller
Your springs, are they for a roller cam or a flat tappet cam? If you dont know take it to a performance oriented machine shop.
Posted by 87 coupe (Member # 10919) on
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Yes these springs are for a roller cam these heads use to be on a 331 stroker along with a F303 cam and 1.6 Rockers
Posted by turbo50 (Member # 6700) on
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You are gonna want 120 closed and 300 open
SO, check your installed height of existing springs then have a machine shop run em down with the lift numbers and see what rates you have.
If installed is 1.450 then you want 120 pounds at installed atleast and you have .542 lift then at .908 you want 300 and make sure you have no coil bind until below that.......(these numbers are GENERIC values)
[ August 10, 2012, 11:56 PM: Message edited by: turbo50 ]
Posted by turbo50 (Member # 6700) on
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So if you have the -2 part number you are set.
Now check PTV
Posted by 87 coupe (Member # 10919) on
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With clay ?
Posted by turbo50 (Member # 6700) on
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quote:
Originally posted by 87 coupe:
With clay ?
Clay or a dial gauge if its already together.
Posted by 87 coupe (Member # 10919) on
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It's still apart I called summit before I ordered these pistons I gave them I talked to the tech guy told him my heads were 58cc but the machine shop resurfaced them to 54cc so I gave them 180cc and a 54cc so they came up with these probe flat top forged pristons with a 2 valve reliefs should be good but I'm definitely checking ptv
Posted by turbo50 (Member # 6700) on
:
quote:
Originally posted by 87 coupe:
It's still apart I called summit before I ordered these pistons I gave them I talked to the tech guy told him my heads were 58cc but the machine shop resurfaced them to 54cc so I gave them 180cc and a 54cc so they came up with these probe flat top forged pristons with a 2 valve reliefs should be good but I'm definitely checking ptv
I used to have a picture of a shortblock with deep valve reliefs and aftermarket pistons......too bad the reliefs were cut in the wrong place.
The 1.60 exhaust valve on the edelbrocks banged everyone of the pistons.....
on a side note, I put that motor back together with some trick flow twisted wedge heads and it ran like a raped ape even after all 8 pistons touching all the exhaust valves......
Posted by 87 coupe (Member # 10919) on
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I'll take all that advice u gave me I want to do
It right the old man helping me out works in a machine shop in the bay rebuilding and building motors everyday so hopefully he's right also u know.
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