This is topic Cam suggestions in forum Tech Talk at Northern California Ford Owners  .


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Posted by Billy Bob (Member # 9412) on :
 
Hello I need help finding out what cam I should run 1991 5.0 notch with my set up. It's a 306 with AFR 185 heads,(still trying to figure out what rocker size) 30 lb injectors, Long tube headers, CAI, typhoon upper and lower intake for now. It will be for street and highway use
 
Posted by SLOWSN95 (Member # 8269) on :
 
Comp Xe282hr. Great midrange and cam that will pull upwards to 6500. Run that with a 1.6 and ALWAYS check ptv and pushrod length.
 
Posted by ed650 (Member # 9897) on :
 
Comp cam xe270hr if you supercharge it down the road or anderson n41 if you plan to stay all motor.
 
Posted by 1fastmach1 (Member # 10137) on :
 
b31hr for supercharge or nitrous and n-71 for na both from anderson motorsports
 
Posted by Billy Bob (Member # 9412) on :
 
quote:
Originally posted by SLOWSN95:
Comp Xe282hr. Great midrange and cam that will pull upwards to 6500. Run that with a 1.6 and ALWAYS check ptv and pushrod length.
What is ptv?
 
Posted by 1Sick91 (Member # 6776) on :
 
ptv = piston to valve clearance.
 
Posted by NEIGHT (Member # 8741) on :
 
quote:
Originally posted by Billy Bob:
quote:
Originally posted by SLOWSN95:
Comp Xe282hr. Great midrange and cam that will pull upwards to 6500. Run that with a 1.6 and ALWAYS check ptv and pushrod length.
What is ptv?
Piston To Valve. You have to check for clearance otherwise you can potentially hit a piston with your valve. I've seen it before(not on my cars) and its not a pretty scene it'll cost you $$$$.
 
Posted by Billy Bob (Member # 9412) on :
 
quote:
Originally posted by NEIGHT:
quote:
Originally posted by Billy Bob:
quote:
Originally posted by SLOWSN95:
Comp Xe282hr. Great midrange and cam that will pull upwards to 6500. Run that with a 1.6 and ALWAYS check ptv and pushrod length.
What is ptv?
Piston To Valve. You have to check for clearance otherwise you can potentially hit a piston with your valve. I've seen it before(not on my cars) and its not a pretty scene it'll cost you $$$$.
How do I check for that clearance?
 
Posted by 1fastmach1 (Member # 10137) on :
 
gotta get some playdoe take the heads off place the play doe on the valve reliefs put your heads back on torque your heads make sure you have the gasket on put your roller rockers on that cylinder and rotate motor one whole rotation then take off cylinder heads and check the play doe with a micromtor and see how much clearnace you have should be more than .080 on the intake and .100 on the exhuast hope this helps
 
Posted by NEIGHT (Member # 8741) on :
 
quote:
Originally posted by Billy Bob:
quote:
Originally posted by NEIGHT:
quote:
Originally posted by Billy Bob:
quote:
Originally posted by SLOWSN95:
Comp Xe282hr. Great midrange and cam that will pull upwards to 6500. Run that with a 1.6 and ALWAYS check ptv and pushrod length.
What is ptv?
Piston To Valve. You have to check for clearance otherwise you can potentially hit a piston with your valve. I've seen it before(not on my cars) and its not a pretty scene it'll cost you $$$$.
How do I check for that clearance?
You'll need:
Play-doh or clay whatever you feel like using(play-doh works best)
Check valve spring
Valve spring compressor to remove valve spring

Once you have those you install the heads with gasket and everything and you turn the motor over a few times then pull it off and check the impression to see how much clearance you have. It's kind of a long process but it's better to check it now than later having it hit and you have to replace your piston/valve and get your heads reworked.
 
Posted by Martinna (Member # 12493) on :
 
FTI knows SBF AFR combinations as good as anyone. They can set you up with a cam, rockers and all that. http://flowtechinduction.com
 




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